baber/WOPTO huggingface dataset:
Patent TW-I785599-B (TW)
Title: Electroplating system
Inventor: MCHUGH PAUL R
IPC: C25D21/12
Filed: 2021-05-06
Granted: 2022-12-01
Abstract: An electroplating system has a vessel assembly holding an electrolyte. A weir thief electrode assembly in the vessel assembly includes a plenum inside of a weir frame. The plenum divided into at least a first, a second and a third virtual thief electrode segment. A plurality of spaced apart openings through the weir frame lead out of the plenum. A weir ring is attached to the weir frame and guides flow of current during electroplating. The electroplating system provides process determined radial and circumferential 
current density control and does not require changing hardware components during set up.
Patent TW-I753834-B (TW)
Title: Improved source/drain performance through conformal solid state doping
Inventor: XIE QI
IPC: H01L21/02
Filed: 2017-04-07
Granted: 2022-01-21
Abstract: A method for improving source/drain performance through conformal solid state doping and its resulting device are disclosed. Specifically, the doping takes place through an atomic layer deposition of a dopant layer. Embodiments of the invention may allow for an increased doping layer, improved conformality, and reduced defect formation, in comparison to alternate doping methods, such as ion implantation or epitaxial doping.
Patent TW-I782604-B (TW)
Inventor: HSU CHO-KANG
IPC: H01Q5/30
Filed: 2021-07-01
Granted: 2022-11-01
Abstract: 一種天線模組，包括基體，輻射部及主動電路，所述輻射部及所述主動電路均設置於所述基體上，所述輻射部由導電材料製成，所述輻射部為完整之片體，所述輻射部之一側設置有至少一訊號饋電點，進而分別為所述輻射部饋入電訊號；所述輻射部上設置有至少一切槽，所述切槽用以將所述輻射部分為間隔設置之輻射分支，所述輻射分支分別電連接至相應之訊號饋電點，進而分別為所述輻射分支饋入電訊號；所述主動電路電連接至所述輻射部，用以切換所述輻射部之輻射模態。本申請還提供一種具有該天線模組之電子設備。
Patent TW-I815155-B (TW)
Inventor: Huang yu-xuan
IPC: H01L21/76
Filed: 2021-08-03
Granted: 2023-09-11
Abstract: 半導體結構，包括：第一電晶體，具有第一源極/汲極部件及第一閘極；第二電晶體，具有第二源極/汲極部件及第二閘極；多層互連，設置在第一電晶體及第二電晶體上；信號互連，在第一電晶體及第二電晶體下；以及電力軌（power rail），在信號互連下且與信號互連電性隔離，其中信號互連電性連接第一源極/汲極部件及第一閘極的其中一個至第二源極/汲極部件及第二閘極的其中一個。
Patent TW-I769065-B (TW)
Title: Display device and manufacturing method thereof
Inventor: CHENG SHIUAN-TZUNG
IPC: H01L33/58
Filed: 2021-08-24
Granted: 2022-06-21
Abstract: A display device includes a circuit substrate, a silicon dioxide pattern and a plurality of light emitting elements. The silicon dioxide pattern is disposed on the circuit substrate and has a plurality of openings. The light emitting elements are disposed on the circuit substrate and electrically connected to the circuit substrate, wherein the light emitting elements are located in the openings respectively and adjacent to the silicon dioxide pattern. A manufacturing method of a display device is also provided.
Patent TW-I787992-B (TW)
Inventor: CHANG YI-KAI
IPC: H02P6/08
Filed: 2021-09-07
Granted: 2022-12-21
Abstract: 本發明係一種直流無刷吊扇手動及遙控器正反轉控制方法，其係包括
一電源、一遙控與手動控制開關組及一吊扇無刷馬達相互導接，於遠端進行檔位信號輸入判別控制吊扇無刷馬達正、反轉，外接將遙控器控制模組可透過現有控制線與手動控制器模組連接，無須增加額外之配線，增加結構之多元使用機制及遠端操作廣泛性，以達結構功能性及使用變化性佳之功效。
Patent TW-I796002-B (TW)
Inventor: KISHIMOTO YOSHIYASU
IPC: B66C13/22
Filed: 2021-11-17
Granted: 2023-03-11
Abstract: 可提供一種具同步機能的連動共吊起重機，具同步捲上的機能，當藉由3個以上鉤進行連動共吊時，各鉤的荷重分擔可同步調整，各別如下地控制複數鉤(H)的捲上馬達(IM)的速度，在捲上時，馬達負載若變大的話隨其使速度變慢，馬達負載若變小的話隨其使速度變快，在捲下時，馬達負載若變大的話隨其使速度變快，馬達負載若變小的話隨其使速度變慢，並各別如下地動作，在捲可起連動共吊時，荷重分擔比其他的鉤(H)更大的鉤(H)的速度是變比其他的鉤(H)慢，荷重分擔比其他的鉤(H)更小的鉤(H)的速度是變比其他的鉤(H)快，在捲下連動共吊時，荷重分擔比其他的鉤(H)更大的鉤(H)的速度是變比其他的鉤(H)更快，荷重分擔比其他的鉤(H)更小的鉤(H)的速度是變比其他的鉤(H)慢，藉此，複數鉤(H)的連動共吊時複數鉤(H)可彼此相互分擔荷重。
Patent TW-I779953-B (TW)
Inventor: WANG ROU-WEI
IPC: H01L21/306
Filed: 2021-12-07
Granted: 2022-10-01
Abstract: The disclosure provides a pattern collapse free wet clean process for fabricating semiconductor devices. By performing post reactive ion etching (RIE) using a fluorine-containing gas such as C2F6, followed by cleaning in a single wafer cleaner (SWC) with diluted hydrofluoric acid (HF) or in a solution of ammonia and HF, a substrate with multiple pattern collapse free high aspect ratio shallow trench isolation (STI) features can be obtained.
Patent TW-I803142-B (TW)
Inventor: JIA JIFEI
IPC: C10G45/08
Filed: 2022-01-07
Granted: 2023-05-21
Abstract: 本發明揭示一種用於加氫加工、加氫處理、或加氫裂解烴原料之負載型觸媒，該負載型觸媒包含至少一種元素週期表之第6族金屬及至少一種第8、9或10族金屬，且視情況包含磷。按氧化物且基於觸媒組成物總重量計算，該第6族金屬包含約30至約45重量百分比，且該第6族與該第8、9或10族或其混合物金屬成分總共包含約35至約55重量百分比。該金屬及磷(若有)被承載在多孔性無機氧化物載體或撐體之上及/或之內，在將金屬及磷併入之前該撐體的總孔體積(TPV)為約0.8 cc/克至約1.5 cc/克，該撐體並包含界定的孔大小分布，且其中該負載型觸媒包含界定的孔大小分布。
Patent TW-I794002-B (TW)
Inventor: Liu han-yi
IPC: G06F3/16
Filed: 2022-01-28
Granted: 2023-02-21
Abstract: A multimedia system and a multimedia operation method are provided. The multimedia system includes a signal encoder, a screen, a plurality of loudspeakers, a processor, and an amplify circuit. The signal encoder encodes image signals, audio signals, and an audio enhancement signal to provide a multimedia signal. The image signal is divided into a plurality of regional image signals based on a plurality of display regions. The audio signal includes a plurality of regional audio signals corresponding to the regional image signals. The processor extracts the image signal, the regional audio signals, and the audio enhancement signal from the multimedia signal, and controls a screen to display the image signal. The amplify circuit adjusts the regional audio signals in response to the audio enhancement signal, and provides the regional audio signals after been adjusted to the plurality of loudspeakers.
Patent TW-I809720-B (TW)
Title: Dynamic random access memory and operation method thereof
Inventor: YEN NUNG
IPC: G11C11/401
Filed: 2022-02-17
Granted: 2023-07-21
Abstract: The invention provides a dynamic random access memory (DRAM) and an operation method thereof. The DRAM includes a memory cell array, a temperature sensor, and a refresh logic circuit. The temperature sensor senses a temperature of the DRAM. The refresh logic circuit enters a tRFC based on a refresh command issued by a memory controller to perform an automatic refresh operation on at least one memory cell row of the memory cell array. In a temperature-controlled refresh mode, the refresh logic circuit correspondingly adjusts the number of a plurality of tRAS periods in the tRFC according to a temperature sensing result of the temperature sensor. In the fine granularity refresh mode, the refresh logic circuit correspondingly adjusts the number of the tRAS periods in the tRFC according to a granularity specified by the memory controller.
Patent TW-I807723-B (TW)
Title: 安裝於釘槍的線簧及具有線簧的釘槍
Inventor: HUANG TSUNG WEN
IPC: B25C5/11
Filed: 2022-03-25
Granted: 2023-07-01
Abstract: 一種具有線簧的釘槍，包含一殼座單元，以及安裝於該殼座單元的一針匣單元、一壓柄、一撞板、一回復件及一線簧。該殼座單元包括一以塑膠材質製成的內殼組，以及一以金屬板材製成且包覆於該內殼組外部的外殼組，該線簧包括一延伸段及一回繞段，該延伸段具有一第一端及一第二端，該回繞段具有一連接端部及一末端部，該連接端部朝該末端部延伸時使該末端部朝該第一端所在方位回彎，該線簧垂直於一軸線的截面具有一寬度及一高度，且該高度與該寬度的比值介於1:1至1:1.6之間。利用整體配置，具有強化結構、降低成本的效果。
Patent TW-I810923-B (TW)
Inventor: CHENG WEI-JEN
IPC: G01N23/20
Filed: 2022-05-05
Granted: 2023-08-01
Abstract: 本發明揭露鍍鋅鋼材構件之銲接性質的評估方法與銲接方法。此評估方法包含對鍍鋅鋼材進行熱成形操作，以形成包含合金層與氧化層的鍍鋅鋼材構件。接著，分析鍍鋅鋼材構件，以獲得X光繞射圖譜，而可藉由合金層與氧化層間的繞射峰強度比值來評估鍍鋅鋼材構件的銲接性質。此評估方法可快速且準確地評估鍍鋅鋼材構件的銲接性質，進而可銲接形成具有良好銲接品質的鍍鋅鋼材連接件。
Patent TW-I815547-B (TW)
Title: 集成式膜式氧合器
Inventor: Liu ri-dong
IPC: A61M1/34
Filed: 2022-07-12
Granted: 2023-09-11
Abstract: 本發明公開一種集成式膜式氧合器，包括氧合器和附接在氧合器上的過濾器，其中，氧合器包括上蓋、下蓋、殼體和氧合結構，殼體的兩端分別連接上蓋和下蓋，氧合結構包括設置在殼體內的芯軸、氧壓膜和變溫膜，過濾器包括過濾器殼體以及安裝在過濾器殼體內的導流結構和濾網，過濾器殼體的入口與氧合器下蓋上的出血口相連，經過氧合器氧合後的血液直接進入過濾器進行過濾處理，能夠減少血液與非自身系統的接觸面積，減輕血液破壞，避免由於手動連接過濾器與氧合器可能帶來的污染風險。
Patent TW-I816498-B (TW)
Title: 匯流排直接中斷服務裝置
Inventor: SHEN TZE-LAN
IPC: G06F13/24
Filed: 2022-08-03
Granted: 2023-09-21
Abstract: 本發明揭露一種匯流排直接中斷服務裝置，耦接於處理器的匯流排介面單元，匯流排直接中斷服務裝置包含中斷指令寄存庫以及中斷請求多工器，中斷指令寄存庫儲存複數個中斷指令及對應各複數個中斷指令的匯流排位置與操作指令，當接收端接收中斷請求時，中斷指令寄存庫由複數個中斷指令當中選擇對應中斷請求的中斷控制指令。中斷請求多工器耦接於匯流排介面單元及中斷指令寄存庫，當中斷請求多工器接收中斷控制指令，直接由輸出介面傳送中斷控制指令對應的操作指令至對應的匯流排位置來操作周邊裝置。
Patent ZA-200006033-B (ZA)
Title: Injection device.
Inventor: WEBER WILFRIED
IPC: A61M5/315
Filed: 2000-10-26
Abstract: An injection device that is used with a syringe, wherein the injection needle of the syringe is initially introduced into the skin and the injection fluid is injected afterwards. The injection device is essentially driven and controlled by a control sleeve (6) which can be displaced and/or rotated in relation to the housing (7) and which can be moved between a closing and functional position (P1) and an open and safety position (P2). In the closing and functional position, the control sleeve prevents access to the syringe and activates a release device for the injection process. In the open and safety position, a syringe (1) can be removed or inserted. A plurality of components carrying out the injection process (a slide (2) in which the syringe (1) is placed and a plunger (4) that impinges upon the syringe piston) are moved or controlled depending on the movement and position of the control sleeve or supported (for example, an ejection device for the syringe or a signaling device informing that injection has been completed). The device enables full-automatic injection that can be reliably carried out by patients themselves with few handling procedures.
Patent ZA-200101051-B (ZA)
Title: Masks and their manufacture.
Inventor: DOANE MARK WILLIAM
IPC: A62B18/02
Filed: 2001-02-07
Abstract: A mask 2, 50 such as a laryngeal mask or face mask, has a soft annular cuff 21, 52 on a more rigid mount 20, 51 of funnel shape. The cuff 21 and mount 20 are moulded together by rotational moulding or the mount 51 is preformed and the cuff 52 is moulded onto the mount in a rotational mould 60. <IMAGE>
Patent ZA-200408435-B (ZA)
Title: Use of a magnesia zirconia brick
Inventor: SCHMALENBACH BERNARD
IPC: C03B5/43
Filed: 2004-10-19
Abstract: The present invention relates to the use of a magnesia-zirconia brick in regenerator chambers of glass troughs, which are at least partially operated using a reducing atmosphere.
Patent ZA-200702183-B (ZA)
Title: Electricially heated cigarette including controlled-release flavoring
Inventor: NEWMAN DEBORAH J
IPC: A24F40/20
Filed: 2007-03-15
Abstract: Electrically heated cigarettes used in an electrical smoking system include a flavoring-release additive and sorbent effective to remove one or more gas-phase constituents of mainstream tobacco smoke. The flavoring-release additive includes at least one flavoring. The flavoring is released in the cigarette upon the flavoring-release additive reaching at least a minimum temperature during smoking. The flavoring-release additive can have various forms including, for example, beads, films and inclusion complexes. Electrical smoking systems including the electrically heated cigarettes, methods of making the cigarettes, and methods of smoking the cigarettes are also provided.
Patent GR-1004086-B (GR)
Title: System of accessories for fast molding and unmolding reinforced concrete
Inventor: PAFILIS EVANGELOU CHRISTOS
IPC: E04G17/00
Filed: 2000-02-22
Abstract: he invention relates to seventeen accessories used for the easy and fast dismounting of surfaces meant for the construction of concrete injection moulds. These accessories are: a mould-adjusting angle, an insertion element fluctuating in width, a false magnetical angle, a mobile platform-receiving construction, a system retaining two I metal elements with frame or insertion element, a system retaining a metal I with frame, an adjuster retaining the sides of the mould, a self-acting pin of double action, a variable angle adjuster, a support for unmolding, a clamp for metal laths, a frame clamp with metal I element, a clamp connecting two metal I elements, a mountable joint for metal I elements (lengthwise), a metal perforated I element, a joint connecting two pipes lengthwise, a metal perforated I element with connection recesses lengthwise, and a metal perforated I element with special connections lengthwise.
Patent IN-159575-B (IN)
Inventor: NATH PREM
IPC: C23C14/34
Filed: 1983-09-06
Abstract: Apparatus (60) for preventing the deposition of nonhomogeneous semiconductor films onto substrates (11) in a glow discharge deposition system which includes at least one deposition chamber (28) into which process gases are introduced and disassociated by electrodynamic fields created between a cathode (34) and the substrate (11). The shielding apparatus (60) of the present invention comprises a pair of relatively narrow, elongated shielding plates (60) spacedly disposed in the deposition chamber (28) so as to lie substantially parallel to the plane of the substrate (11), one each disposed adjacent each of the ends of the cathode (34) to block nonhomogeneous films induced by the varied electrodynamic fields (B) which occur at the ends of the cathode (34) from being deposited. In this way, only homogeneous semiconductor films formed by uniform electrodynamic fields (A) produced adjacent the central portion of the cathode (34) are deposited onto the substrate (11). The shielding plates (60) are preferably coated with a polymer film (61) to prevent discharge in the area between the shielding plates (60) and the substrate (11).
Patent MX-339571-B (MX)
Title: Non-alchohol bioactive essential oil mouth rinses.
Inventor: MORDAS CAROLYN J
IPC: A61K8/92
Filed: 2011-06-30
Abstract: The invention relates generally to mouth rinses for the prevention and elimination of bad breath as well as for the reduction of oral microorganisms responsible for the development of dental plaque and tooth decay. In particular, the present invention relates to a non-alcohol or reduced alcohol mouth
Patent MX-355386-B (MX)
Title: Process and apparatus for adsorptive bubble separation.
Inventor: ROBERT L CLAYTON
IPC: C12M1/08
Filed: 2008-06-18
Abstract: Process and apparatus are described for adsorptive bubble separation of hydrophobic particles from liquid dispersions. The process may be used to treat the gas/liquid dispersion after it has been introduced from two or more ducts near the perimeter or from a central duct of the separation vessel. When the gas-liquid-particle dispersion is introduced from a central duct, the rising bubbles are directed by, e.g., a baffle toward the perimeter of the apparatus, where they rise. At the liquid surface, bubbles with attached hydrophobic materials form a floating froth layer, which is directed toward a central froth collection launder.. Rising froth at the perimeter pushing the froth bed into the reduced area of the center encourages further coalescence of the bubbles and increases liquid drainage from the froth, thus leading to concentration of the collected materials without the need for complex equipment geometry. Also disclosed is an improvement for froth flotation processes comprising using a vacuum to pull froth and/or collapsed froth into and through the froth collection launder and froth drain line. This improvement assists froth collection because froth can be pulled by suction through the collection system more easily than it can be drained by gravity.
Patent MX-353374-B (MX)
Title: Method for making a filter segment for a disc filter and the filter segment.
Inventor: AKE RALVERT
IPC: B01D33/23
Filed: 2011-08-30
Abstract: A method and device for making a disc shaped filter segment (1) of a disc filter (not shown), said filter segment (1) comprising a filter frame (2) and a filter material (3), said filter frame (2) being adapted for a filter support (not shown) of the disc filter. The method includes injection moulding of the filter frame (2) in a lower half (4a) and an upper half (4b) with a filter material (3) placed between the lower half (4a) and the upper half (4b), said filter material (3) being stretched and during the injection moulding in stretched condition integrated in the lower half (4a) and the upper half (4b) of the filter frame (2), and wherein the filter material (3) after injection moulding exhibits a residual stretching of the material. The device concerns an injection moulded filter frame (2) with a filter material (3) integrated in stretched condition between a lower half (4a) of the filter frame (2) and an upper half (4b) of the filter frame (2), said filter material (3) after injection moulding exhibiting a residual stretching of the material.
Patent MX-345613-B (MX)
Title: Nucleic acid molecules that confer resistance to coleopteran pests.
Inventor: KENNETH E NARVA
IPC: C12N15/63
Filed: 2011-12-30
Abstract: This disclosure concerns nucleic acid molecules and methods of use thereof for control of coleopteran pests through RNA interference-mediated inhibition of target coding and transcribed non-coding sequences in coleopteran pests. The disclosure also concerns methods for making transgenic plants that express nucleic acid molecules useful for the control of coleopteran pests, and the plant cells and plants obtained thereby.
Patent MX-365732-B (MX)
Title: Processes for producing cycloalkylcarboxiamido-pyridine benzoic acids.
Inventor: DAVID SIESEL
IPC: C07D405/12
Filed: 2008-12-04
Abstract: The present invention relates to a process of providing the 3 -(6-(I -(2,2- difluorobenzo[d][l,3]dioxol-5-yl) cyclopropanecarboxamido)-3-methylpyridin-2-yl)benzoic acid in substantially free form (Compound 1).
Patent MX-349859-B (MX)
Title: Method for cultivating sugar cane.
Inventor: NILTON DEGASPARI
IPC: A01N25/00
Filed: 2012-04-13
Abstract: The present invention relates to a method for cultivating sugar cane comprising cutting the stalk of an adult sugar cane plant into pieces, placing the stalk pieces containing at least one node in a humid medium, removing the shoots emerged from the nodes of the stalk or of the stalk pieces, optionally removing the newly emerged shoots, where this step can be repeated one or several times, removing the newly formed shoots when they are 10 to 60 cm long in such a way that they comprise meristematic tissue, planting these shoots in a growth medium, growing seedlings from the shoots at a temperature of at least 15°C, and 10 to 120 days after planting the shoots, planting the seedlings grown from the shoots to the field if the growth medium is not a field, or, in case the growth medium is a field, exposing the seedlings obtained from the shoots to ambient conditions.
Patent MX-354993-B (MX)
Title: Prevention of disulfide bond reduction during recombinant production of polypeptides.
Inventor: KAO YUNG-HSIANG
IPC: C07K1/00
Filed: 2008-07-08
Abstract: The invention concerns methods and means for preventing the reduction of disulfide bonds during the recombinant production of disulfide-containing polypeptides. In particular, the invention concerns the prevention of disulfide bond reduction during harvesting of disulfide-containing polypeptides, including antibodies, from recombinant host cell cultures.
Patent MX-341195-B (MX)
Title: Coating system.
Inventor: JULIANE KRÜSEMANN
IPC: C09D7/41
Filed: 2012-09-14
Abstract: A coating formed on a substrate is provided which coating comprises (a) an organic NIR-transparent pigment and/or an inorganic NIR-reflective pigment; (b) a dye having a transmittance of at least 75% in the range of from 700 to 2500 nm; and (c) optionally an effect pigment; wherein said coating exhibits a total solar reflectance (TSR) of (i) = 40%, if 60 < L* < 100, or (ii) = 30%, if 30 < L* = 60, or (iii) = 20%, if 0 < L* = 30, wherein L* is the lightness. The coating is suitable for an exterior-use coating like an industrial coating or a coating for vehicles, especially an automotive finish, having improved jetness.
Patent MX-348126-B (MX)
Title: High clearance adjustable sprayer.
Inventor: JONES MATTHEW
IPC: A01C23/00
Filed: 2014-07-29
Abstract: An agricultural sprayer assembly includes a wheeled carriage, a chassis, and a spray delivery system. The wheeled carriage has a number of adjustable support legs (e.g., four), each formed of hydraulically coupled and actuated upper and lower leg sections or members. The chassis is supported on the wheeled carriage, at an adjustable clearance height defined by the operational height of the support legs. The spray delivery system includes a spray boom coupled to a boom support, and an actuator coupled to the boom support and the chassis. The actuator is configured to adjust the height of the spray boom with respect to the clearance height of the chassis.
Patent MX-354526-B (MX)
Title: Methods and systems for capturing and sequestering carbon and for reducing the mass of carbon oxides in a waste gas stream.
Inventor: NOYES DALLAS B
IPC: B01J23/755
Filed: 2013-03-15
Abstract: Methods of capturing or sequestering carbon include introducing a reaction gas stream to a catalytic converter to convert a portion of the carbon in the carbon oxide to solid carbon and a tail gas stream containing water vapor, removing the solid carbon from the catalytic converter for use, disposal, or storage, and recycling at least a portion of the tail gas stream to the catalytic converter. Methods may also include removing a portion of the water from the tail gas stream. The tail gas stream includes a portion of the initial process gas stream and at least a portion of water vapor produced in the catalytic converter. Methods may also include removing water vapor from various streams and reacting the carbon oxide with a reducing agent in the presence of a catalyst. Systems for capturing or sequestering carbon from a gaseous source containing carbon oxides are also described.
Patent MX-357161-B (MX)
Title: Method for removing an ester from a vapor mixture.
Inventor: FRANÇOIS LOVIAT
IPC: B01D53/96
Filed: 2013-04-23
Abstract: A method for the removal of an ester (3') from a vapor mixture (5') containing the ester (3') is disclosed. The method comprises the steps of by bringing the vapor (5) mixture (5') into contact with an aqueous solution (6') containing the acid (4') corresponding to the ester (3'), wherein a portion of the ester (3') is dissolved in or otherwise transferred to the aqueous solution (6'), and the aqueous solution (6') is after the contact led in a circulation (73), the aqueous solution (6') is processed in the circulation (73) in a process comprising: a heating step (240), a (10) reaction step (250) having a residence time and a temperature, a cooling step (260), wherein the heating step (240) precedes the reaction step (250), the reaction step (250) precedes the cooling step (260), and the residence time and the temperature in the reaction step (250) are sufficient to substantially reduce the content of the ester (3') in the aqueous solution (6'). The invention further (15) relates to an apparatus (1) for carrying out said process. The present invention further relates also to the use of the apparatus (1) in the method of the invention, preferably in the production of a lactide (13') or a polylactic acid polymer (12').
Patent MX-360442-B (MX)
Title: Propylene via metathesis with low or no ethylene.
Inventor: ROBERT J GARTSIDE
IPC: C07C2/08
Filed: 2013-09-11
Abstract: A process for producing propylene is disclosed, including: fractionating a mixed C4 hydrocarbon stream to recover a first fraction comprising isobutene and a second fraction comprising 2-butene; contacting the first fraction with a first metathesis catalyst in a first metathesis reaction zone; recovering an effluent from the first metathesis reaction zone comprising at least one of ethylene, propylene, unreacted isobutene, C5 olefins, and C6 olefins; contacting the second fraction and the ethylene in the effluent with a second metathesis catalyst in a second metathesis reaction zone; recovering an effluent from the second reaction zone comprising at least one of unreacted ethylene, propylene, unreacted 2-butene, fractionating the effluent from the first metathesis reaction zone and the effluent from the second metathesis reaction zone to recover an ethylene fraction, a propylene fraction, one or more C4 fractions, and a fraction comprising at least one of C5 and C6 olefins.