baber/WOPTO huggingface dataset:
Patent KR-20000015709-A (KR)
Title: Manufacturing method of sintered ore using starch sugar
Inventor: KIM SUNG HWAN
IPC: C22B1/16
Filed: 1998-08-31
Abstract: PURPOSE: A preparation method of sintered ore by adding starch sugar as raw material is provided which improves the productivity of sintering by increasing the particle diameter and raising its hardness. CONSTITUTION: In the manufacturing method of sintered ore by mixing sintering raw material, granulating, discharging in a truck, and sintering, 1-5 weight% of starch sugar based on the total weight of water for granulating is added to raw material. For an example, starch is prepared by mixing corn starch with alpha-amylase and water, saccharifying, decolorizing, purifying, and concentrating. 40kg mixture comprising 23.8 wt.% of iron ore, 0.0-1.0 wt.% of unslaked lime, 19.2 wt.% of half ore, and 3.2 wt% of powder coke is added with starch sugar in a drum mixer to granulate. As the property of granulating of sintering raw material improves, the productivity of sintering increases about 7-11%.
Patent KR-20000019739-A (KR)
Title: Radio interface unit of wideband wireless local loop system equipped with a v.34 standard modem function
Inventor: HWANG MYUNG GYU
IPC: H04L29/10
Filed: 1998-09-15
Abstract: PURPOSE: A radio interface unit is provided to perform telephone and data communications in a wireless local loop as well as data communications in a local loop by adding the CODEC supporting the V.34 to the RIU of the W-WLL system. CONSTITUTION: A switching module(43) outputs the CDMA-decoded communication data to modules for telephone and data communications or outputs data from the modules to a CDMA modulation module(42) or V.34 CODEC(48). an AT command process module(45) provides a function of a modem during a serial data communication. A serial data communication connection module(46) transmits data to a personal computer(PC) or to the CDMA modulation module(43) during a data communication in a wireless local loop and transmits the data to the V.34 CODEC(48) in a local loop. The V.34 CODEC(48) transmits the data of the CDMA of the serial data communication connection module(46) to a switching system or to the serial data communication connection module(46) through V.34 encoding or V.34 decoding.
Patent KR-19980087856-A (KR)
Title: 박판 버저의 떨판 지지링
Filed: 1998-09-25
Abstract: 박판 버저의 다이어프램 지지링의 외주벽면에 환상요구를 형성하여 지지링과 버저 덮개와의 접착력을 강화하고 접착제 소모를 줄이도록 한 것이다.
Patent KR-20000021051-A (KR)
Title: Telephone having abbreviated dial button and method of abbreviated dialing
Inventor: RA JONG RIB
IPC: H04M1/26
Filed: 1998-09-25
Abstract: PURPOSE: A telephone having an abbreviated dial button and a method of abbreviated dialing are provided to perform a radio paging by using an abbreviated dial button. CONSTITUTION: A telephone includes a memory, a controller, and dual tone multi frequency(DTMF) generator. The memory stores a telephone number corresponding to an abbreviated dial button. The controller reads a telephone number corresponding to the abbreviated dial button from the memory, and outputs it. The DTMF tone generator generates a DTMF tone corresponding to a telephone number being input by the controller. The controller includes a recognition part of start button or pound button, and a recognition part of a response(132). In case of the specific number, the recognition part of start button or pound button holds the reading operation until the other person response the number. When the reading operation is held, the recognition part of a response recognizes a response from the other person, and controls a starting of the reading operation.
Patent KR-20000025443-A (KR)
Title: Epoxy resin composition
Inventor: CHANG SIYU RONG
IPC: C08L63/00
Filed: 1998-10-12
Abstract: PURPOSE: An epoxy resin composition containing a specified phenol epoxy resin is provided which has low moisture absorption, the low coefficient of thermal expansion, high fluidity and improved heat resistance. CONSTITUTION: An epoxy resin composition comprises (A)from 1 to 99% by weight of phenol epoxy resin of formula I based on the total weight of the epoxy resin, (B)from 1 to 99% by weight of epoxy resin different from the formula I based on the total weight of the epoxy resin and (C)from 1 to 90% by weight of curing agent based on the total weight of the epoxy resin. In formula, n is 0 or 1, R1,R2,R3 have the meanings given in the description. The epoxy resin composition is particularly suitable for encapsulating semiconductor devices since the composition has a good mold ability and cures into a product having the low coefficient of expansion, heat resistance and low moisture absorption. It can be also used for a molding material, a powder coating material, a printed circuit board material, and adhesives.
Patent KR-19990007697-A (KR)
Title: 음식물쓰레기와 하수슬러지의 병합처리방법
IPC: C02F3/30
Filed: 1998-10-22
Abstract: 본 발명의 음식물쓰레기와 하수슬러지의 병합처리방법은 음식물 쓰레기로부터 철, 플라스틱, 비닐, 기타 이물질을 선별분리하고, 선별분리된 음식물쓰레기를 미생물에 의한 분해속도를 촉진시키도록 그 입경이 1∼2 mm 정도 이하가 되도록 파쇄하고, 파쇄된 음식물쓰레기를 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합처리하거나, 파쇄된 음식물쓰레기를 산발효시키고 pH를 조절한 후, 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합처리하는 방법에 관한 것이다.
Patent KR-19990007720-A (KR)
Title: 신발 밑창 제조용 금형 및 그 제조방법
Filed: 1998-10-23
Abstract: 본 발명은 신발 밑창 제조용 금형 및 그 제조방법에 관한 것으로, 내부공간부(110a)가 형성되고 금속재질로 구성되어 반복 재생사용되는 하부금형(110)과, 상기 하부금형(110)의 내부공간부(110a)에 착탈되고 밑창 크기의 형상과 내면에 소정의 밑창 무늬가 형성된 밑창형성부(114)가 중앙에 형성되며 밑창제조를 위해 가해지는 소정압력과 소정온도에서 변형이 발생되지 않는 경도 및 내열성으로 이루어진 밑창형성부재(112), 그리고 상기 하부금형(110)의 상부에 덮이는 상부금형(120)으로 구성되는 것을  신발밑창 제조용 금형을 제공하는데 있다.  그리고, 상기 밑창형성부재(112)는, 밑창의 제조를 위해 필요로 하는  60   kgf/cm 3     의 이상의 압력과 150℃이상의 온도에 견디는 내구성 재질로 이루어 지도록 하며, 내열성 실리콘고무와 경도를 강화하면서 열전도율이 우수한 알루미늄금속분말의 혼합으로 구성되며, 가압되는 밑창에 의해 발생되는 에어를 외부로 배출하는 에어통로(114a)를 더 포함하여 형성되도록 할 수 있다.  따라서 본 발명에 의하면, 밑창형성부재(112)에 의해 밑창제조용 금형을 간단하게 제작할 수 있으므로 금형제작비용이 절약될 수 있을 뿐만 아니라 금형제작시간이 단축될 수 있는 잇점과 또한, 밑창제조에 있어 밑창형성부재(112)만 교환하고, 금형(110)은 반복사용할 수 있으므로 자원의 재활용측면 뿐만 아니라 금형제작비용이 매우 저렴해지는 잇점이 있다.
Patent KR-20000031308-A (KR)
Title: Phyllanthus urinaria extract used for hepatitis therapy and production method thereof
Inventor: LEE YEONG IK
IPC: A61K36/47
Filed: 1998-11-05
Abstract: PURPOSE: Provided are a Phyllanthus urinaria extract and production method thereof. Phyllanthus urinaria extract inhibits hepatitis B virus e antigen(HBeAg) and s antigen(HBsAg) production, suppresses proliferation of virus, and shows low toxicity therefore, it could be used for hepatitis therapy. CONSTITUTION: Phyllanthus urinaria is methanol-extracted using 3000 ml of methanol per100g of Phyllanthus urinaria at 40-60°C, and dehydrated by using 45-55g of magnesium sulfate, celite, evaporator, or freeze dryer. The extract especially, having an anti viral activity is further purified by silicagel column, gel filtration column, high pressure liquid column chromatography. In which, gel filtration column is proceeded using sephadex column with 2 ml of mixture solvent of methanol and ethylacetate per a minute and keeping temperatures within 10°C, and high pressure liquid column chromatography uses C-18 reverse phase HPLC column and 1.5 ml of methanol per a minute as a solvent keeping temperatures within 10°C. Final extract provides a pharmaceutical composition for hepatitis therapy and immunofacilitation and the dosage thereof is preferably 50-200mg per a day for an adult.
Patent KR-20000031876-A (KR)
Title: Process for preparing an alloy plate for a lead battery improved in corrosion resistance and distortion resistance
Inventor: KIM JEONG HEON
IPC: C22F1/12
Filed: 1998-11-11
Abstract: PURPOSE: A process for preparing an alloy plate for lead battery is provided to give the outstanding improvements of erosion resistance and distortion resistance. CONSTITUTION: The process may be also carried out by the procedure as shown figure 1.Especially, the process is characterized by comprising the following steps. First, an alloy plate is cold-rolled. Second, the temperature of the rolled plate is increased to between 100 and 170°C. Finally, the desired plate is completed by recrystallizing the thus-obtained material.
Patent KR-19990062562-A (KR)
Title: 접근 포인터를 갖는 컴퓨터 디스플레이 상에서다수의 그래픽사용자 인터페이스 구성 요소를 조작하는컴퓨터 시스템 및 방법
IPC: G06F3/033
Filed: 1998-11-12
Abstract: 본 발명에 따른 컴퓨터 시스템 및 방법은 포인터 가까이에 위치되는 접근 범위 내에 적어도 부분적으로 위치되는 윈도우를 동시에 조작하는 접근 포인터를 사용하여 다수의 윈도우 또는 유사한 그래픽 사용자 인터페이스 구성 요소를 조작한다. 윈도우는 포인터의 이동에 응답하여 동시에 이동되거나 또는 크기가 변경(resize)될 수 있다. 대안적으로, 윈도우는 포인터 가까이에 위치되는 공통 원점(common origin)으로부터 연장되는 방사상 라인을 따라 내부 및 외부로 향하는 방향 중 어느 한 방향으로 이동되거나 또는 크기가 변경될 수 있다.
Patent KR-20000034170-A (KR)
Title: Method for controlling water level of washing machine
Inventor: SHIN SEONG JAE
IPC: D06F33/02
Filed: 1998-11-27
Abstract: PURPOSE: A method for controlling a water level is provided to reduce energy and to prevent a waste of washing water by controlling a washing water level to fit for the amount and the kind of the laundry. CONSTITUTION: When the laundry is inputted, washing water is supplied through a device of water supply. When a time of water supply is passed a regular time, a washing motor is rotated. The rotation number of the washing motor is arrived at a set RPM in a control device. The water supply is stopped and a washing water level is decided by stopping the water supply. However, when the time of water supply is not passed the regular time in the step for deciding the time, the operation of water supply is continued by returning to the step of water supply.
Patent KR-20000034665-A (KR)
Title: Connection structure of select cable for auto transmission
Inventor: KIM KYEONG MOK
IPC: B60K17/06
Filed: 1998-11-30
Abstract: PURPOSE: A connection structure of a select cable for an auto transmission is provided to prevent a transfer of vibration of an auto transmission into a vehicle room through a select cable. CONSTITUTION: A connection structure of a select cable for an auto transmission comprises a socket(30), a guide component(36), an E ring(35), an elastic body(37), an auxiliary fastener(38) and a nut component(39). The socket(30) has a screw portion(31) at a covering portion of an outer cover material(5) covering an inner wire(14) in the select cable(2), a protrusion(32) having a larger diameter than the inner periphery surface of a through hole(4) of a fastener(3), a contacting surface(33) corresponding to the inner periphery surface of the through hole(4) and an inserting groove(34) sequentially formed thereon. One end of the guide component(36) is welded to one end of the socket(30). The E ring(35) is inserted in the inserting groove(34), so that prevent flowing of the socket(30). The elastic body(37) is installed on the backward of the protrusion(32) of the socket(30). The auxiliary fastener(38) is installed on the backward of the elastic body(37). The nut component(39) is inserted on rear of the auxiliary fastener(38), so that engaged with a screw portion(31) of the socket(30). Therefore, a vibration transferring of the auto transmission through the select cable into the vehicle room is prevented.
Patent KR-20000037613-A (KR)
Title: Method for processing text input-output instruction in switching system
Inventor: YU CHAN HYONG
IPC: H04Q1/20
Filed: 1998-12-01
Abstract: PURPOSE: A method for processing a text input-output instruction in the switching system is provided to improve the function of the system flexibly while directly applying the input-output definition for an added portion and additional software functions, when a new switching function is added, in the distributed structure switching system. CONSTITUTION: If an operator connects with a web server(32) to process instructions on a web client(31) and the web client(31) is set up, the operator reports the activation status of the web client(31) to the instruction server(32) periodically. The instruction server(32) operates a window setup and management unit(33) as a daughter processor. The window setup and management unit(33) controls the suitability of a user and the window and frame setup on the web client(31), inspects the activation status of the web client(31) and announces the result of window setup to the web client(31) through the instruction server(32).
Patent KR-19990062722-A (KR)
Title: 플로피디스크드라이브를 이용하는 인터페이스장치
IPC: G06F3/00
Filed: 1998-12-02
Abstract: 본 발명은 플로피디스크드라이브를 이용하는 인터페이스장치에 관한 것으로서, 
     본 발명은 플로피디스크와 동일 형상을 갖고 그 헤드윈도우부에 플로피디스크드라이브(11)의 자기헤드와 맞닿아서 데이터의 송수신을 실시하는 자기인터페이스를 형성한 케이싱부(3a)와, 플로피디스크드라이브(11)에 대한 장착에 의해 해당 플로피디스크드라이브의 플로피디스크삽입구(11a)로부터 도출하여 디지털스틸카메라(2)와 접속되는 케이블부(3b) 및 커넥터부(3c), 또는 적외선송수신부를 구비하고, 케이싱부(3a)내에서 플로피디스크드라이브(11)와 디지털스틸카메라(2)의 사이의 데이터변환을 실시하는 것인 것을 특징으로 한다.
Patent KR-20000038299-A (KR)
Title: Method for forming contact hole in semiconductor device
Inventor: CHOI JUN BAE
IPC: H01L21/28
Filed: 1998-12-05
Abstract: PURPOSE: A method for forming a contact hole in a semiconductor device is provided to reduce polymer occurring in forming a contact hole and to minimize damage to a substrate. CONSTITUTION: A method for forming a contact hole in a semiconductor device comprises depositing a lay-insulating layer on a semiconductor substrate and forming a contact hole by etching a portion of the lay-insulating layer in a plasma etching apparatus, wherein RF power, which is applied to an upper electrode of the plasma etching apparatus, is 1400W to 1600W. An etching gas used in the plasma etching apparatus a C4F8 and oxygen mixture, wherein the ratio of C4F8 to oxygen is 12:5-12:9.
Patent KR-20000041303-A (KR)
Title: Friend or foe discriminating method of radar system
Inventor: NO SEUNG WOOK
IPC: G01S13/78
Filed: 1998-12-22
Abstract: PURPOSE: A friend or foe discriminating method of a radar system is provided to reduce a friend or foe discrimination error by sending interrogation sentences using various object modes complexly. CONSTITUTION: In a friend or foe discriminating method of a radar system, a first code sentence is sent to a target(400). Whether a correct response to the first code sentence is received is judged(410). If a correct response to the first code sentence is received, the target is discriminated as a friend(420). If an incorrect response to the first code sentence is received, a second code sentence is sent to the target(430). Whether a correct response to the second code sentence is received is judged(440). If an incorrect response to the second code sentence is received, the target is discriminated as a foe(470). If a correct response to the second code sentence is received, a third code sentence is sent to the target(450). Whether a correct response to the third code sentence is received is judged(460). If an incorrect response to the third code sentence is received, the target is discriminated as a foe(470). If an incorrect response to the third code sentence is received, the target is discriminated as a friend(480).
Patent KR-20000042329-A (KR)
Title: Integral air conditioner
Inventor: KIM HYEON SIK
IPC: F24F1/00
Filed: 1998-12-24
Abstract: PURPOSE: An integral air conditioner is provided to integrally produce without increasing volume by cooling a condenser with condensed water generated from an evaporator and some of coolants vented to the evaporator. CONSTITUTION: A cooling water case(140) is installed to store cooling water including condensed water formed on the surface of an evaporator(117) in a cabinet(100). A condenser(43) is installed inside the cooling water case and heat-exchanges with cooling water. A cooling pipe is installed to contact with the condenser, and some of the coolants vented to the evaporator pass through the cooling pipe. The condenser is cooled by the cooling pipe in which the cooling water and some of the coolants are flowed so that the temperature of the coolant transmitted to an expansion valve is low. Thereby, the integral air conditioner is produced by installing a compressor, the condenser, the expansion valve and the evaporator in one cabinet without increasing the volume.
Patent KR-20000044865-A (KR)
Title: Method for manufacturing a split gate type flash eeprom cell
Inventor: CHO SU MIN
IPC: H01L27/10
Filed: 1998-12-30
Abstract: PURPOSE: A method for manufacturing a split gate type flash EEPROM cell is provided to improve the reliability of a device by preventing the impurity of a metal contact. CONSTITUTION: A stack gate in which a floating gate, a dielectric layer, and a program gate are stacked is formed on a selected region of the upper portion of a semiconductor substrate. A source and a drain are formed by accomplishing the impurity ion implantation process at the selected region of the semiconductor substrate. A spacer is formed on the side wall of the stack gate. After a select gate oxidation layer is formed on the selected region of the upper portion of the semiconductor substrate, a select gate is formed.
Patent KR-20000047097-A (KR)
Title: Ribbon-typed optical cord and method thereof
Inventor: KWON OH JUN
IPC: G02B6/00
Filed: 1998-12-31
Abstract: PURPOSE: An optical cord and the manufacturing method therefor are provided to be easily manufactured by simple process by forming a layer of super polymer polyethylene, which is strong against external tensile strength, onto a resin layer of the optical fiber ribbon. CONSTITUTION: Polyethylene layers(25) having a high tensile strength are coated around a plurality of single-core optical fibers(10). The successive resin layers(21,23) having predetermined thickness are simultaneously coated on peripheral surfaces of the polyethylene layers(25). The polyethylene layers(21,23) are made of acrylate based synthetic resin, and the tensile layers(25) are made of super polymer polyethylene.
Patent KR-20000047355-A (KR)
Title: Sludge dewatering equipment using gravitation
Inventor: SON EUL TAEK
IPC: C02F11/12
Filed: 1998-12-31
Abstract: PURPOSE: A sludge dewatering equipment is provided, which is characterized in that dewatering process is carried out by gravitational force, thus it reduces cost for dewatering. CONSTITUTION: Sludge flows into P.P. packing-cloth-bag(8) of a first compartment. By inflow-pressure, water drains through pores formed on the surface of P.P. packing-cloth-bag. When P.P. packing-cloth-bag(8) is filled with sludge, a solenoid valve, installed in one side of sludge inlet port, is closed by sensor. Continuously, iron- construct(2) moves in the direction of A by a moving means(4). Then, the first compartment is moved, and a second compartment moves down of inflow inlet port(1). And the solenoid valve is opened, sludge flows into P.P. packing-cloth-bag(8) of the second compartment. When all compartments are filled with sludge, the iron-construct(2) moves in the direction of B by moving means(4). So, first compartment is returned down of inflow inlet port (1).
Patent KR-19990035910-A (KR)
Title: 휴대용 무선전화와 차량키트 간의 작동 및 비작동 접속을 지시하기 위한 방법 및 장치
IPC: H04W92/08
Filed: 1996-07-26
Abstract: 본 발명은 이동통신시스템을 형성하는 휴대용 무선전화와 차량키트간에 작동 접속 또는 비작동 접속이 이루어졌는가를 사용자에게 나타내는 시스템과 방법이다. 핸드-프리 요청신호, 외부 전력신호 및 외부 안테나신호가 존재하는지를 판단함으로써 작동 접속이 이루어졌는가를 시스템은 판단한다. 핸드-프리 요청신호, 외부 전력신호 및 외부 안테나신호의 검출은, 이동통신시스템이 완전히 작동되도록 휴대용 무선전화와 차량키트가 유기적으로 연결되었다는 것을 나타낸다. 휴대용 무선전화와 차량키트간의 작동 접속을 나타내는 작동 접속경보는 핸드-프리 요청신호, 외부 전력신호 및 외부 안테나신호가 존재한다는 판단에 따라 무선전화 디스플레이와 외부 스피커에 의해 발생된다. 바람직한 실시예에서, 외부 안테나신호는 휴대용 무선전화를 차량키트의 수화기대에 삽입한 후에 RSSI에서의 증가를 검출하거나 또는 수신된 신호강도지시(RSSI)와 기준 RSSI를 비교함으로써 판단된다.
Patent KR-19990044464-A (KR)
Title: 디지탈 정보신호의 전송, 기록 및 재생
IPC: H03M7/14
Filed: 1997-06-11
Abstract: M이 2보다 큰 정수상수이고 f b 가 채널 인코드 정보신호에서 비트 주파수일 때, f b /M에서 단일 주파수 성분을 가지는 재생되는 수신 아날로그 신호를 발생시키는 채널 인코드 정보신호에서 적어도 데이터 스컨스의 길이가 제한되도록 디지탈 정보신호는 채널신호로 채널 인코드 된다.
Patent KR-19990077009-A (KR)
Title: 나프탈렌디카르복실산 입자 및 그 제조방법
IPC: C07C63/38
Filed: 1997-05-14
Abstract: 본 발명은 EG 슬러리특성값이 2.7 이하인 슬러리 유동성이 우수한 나프탈렌디카르복실산 입자 (NDA) 를 제공한다.  상기 EG 슬러리특성값은 나프탈렌디카르복실산과 에틸렌 글리콜(EG)의 혼합물로 된 슬러리 중의 에틸렌 글리콜의 나프탈렌디카르복실산에 대한 몰비(EG의 몰수/NDA의 몰수)로 정의하며, 상기 슬러리는 브룩크필드 점도계로 측정하였을 때 점도가 1000 cP 이다.  폴리에틸렌 나프탈레이트를 생산하기 위한 원료로 본 발명의 나프탈렌디카르복실산 입자를 사용하면 경제적인 견지에서 뿐만아니라 폴리에틸렌 나프탈레이트의 질을 저하시키는 반응생성물을 거의 만들지 않기 때문에도 유리하다.
Patent KR-19990077303-A (KR)
Title: 벽면 흡착식 이동장치 및 벽면 흡착식 이동장치의 자석구동방법
IPC: B25J5/00
Filed: 1997-11-19
Abstract: 대형 철 구조물의 보수 점검 등에 적용할 수 있는 벽면 흡착식 이동장치에 있어서, 장치의 중량 증가나 대형화를 억제하면서 벽면상의 장해물을 뛰어넘을 때에 영구 자석이 장해물에 부딪치지 않도록 하면서 장치를 주행면에 확실하게 흡착시켜 주행시키도록 하는 것을 목적으로 하고, 자성체제 벽면(30)상를 이동하는 이동체(5)와, 영구 자석(2a, 2b)과 영구 자석(2a, 2b)을 벽면 (30)에 대하여 이접시키는 구동 기구(1a, 1b), 영구 자석(2a, 2b)의 이접 방향 위치를 검출하는 센서(19a, 19b), 영구 자석의 벽면 흡착력을 검출하는 센서(3a, 3b), 벽면(30)상의 장해물을 검출하는 센서(17a 내지 18b)로 이루어지는 흡착 기구(40a, 40b)를 구비하고, 상기 각 센서로부터의 검출 정보에 근거하여, 영구 자석(2a, 2b)이 장해물과 부딪칠 우려가 있으면, 이것을 회피하면서, 각 흡착 기구(40a, 40b)에 있어서의 영구 자석의 벽면 흡착력(2a, 2b)의 합계에 의해 필요한 벽면 흡착력이 발생하도록 제어한다.
Patent KR-19990082568-A (KR)
Title: 선박용 안전 보장 스테이션
IPC: B63C9/02
Filed: 1997-02-11
Abstract: 선박상의 안전 보장 스테이션에 구명보트(10)가 있고, 상기 구명보트는 그 종방향이 선박의 종방향과 일치하며 선박의 긴 측면에서 진수될 수 있다. 봉함된 각각의 구명보트(10)는 적어도 그 한 단부가 밀폐형 내단부벽(21)과 구명보트 선체 사이에 공간을 가지고, 상기 내단부벽은 구명보트에 내로 안내하는 도어(22)를 구비하고, 상기 도어는 폐쇄상태에서는 방수되며, 상기 선체는 개구(20)를 구비하고, 그 하부 승선대는 구명보트가 떠있을 때 바람직하게 수면위에 있게된다.
Patent KR-20000015878-A (KR)
Title: Recovery of styrene from pyrolysis gasoline by extractive distillation
Inventor: LEE FU-MING
IPC: B01D3/32
Filed: 1997-05-07
Abstract: PURPOSE: Processes to produce high purity styrene from a pyrolysis gasoline stream containing close-boiling aromatic and non-aromatic hydrocarbons by extractive distillation employing a more selective solvent are provided. CONSTITUTION: The process for separating styrene from at least one close-boiling aromatic or non-aromatic hydrocarbon such as o-xylene comprises the steps of extractively distilling the mixture in the presence of a two-part extractive solvent, the first part of which is selected from the group consisting of propylene carbonate, sulfolane (tetramethylene sulfon), methyl carbitol, 1-methyl-2-pyrrolidinone, 2-pyrrolidinone, and mixtures thereof, and the second part of which is water, to obtain a solvent fraction relatively rich in styrene, and stripping styrene from the solvent fraction. The extractive solvent preferably contains 0-10 wt% of the second part to the first part. Also the process for producing styrene from a feedstock comprising styrene and at least one close-boiling aromatic or non-aromatic hydrocarbon comprises feeding the feedstock into a distillation zone, feeding the two-part extractive solvent into the distillation zone, distilling the feedstock in the distillation zone in the presence of the extractive solvent to produce a solvent fraction relatively rich in styrene compared to the solvent fed to the distillation zone and an overhead fraction comprising the hydrocarbon and being relatively lean in styrene compared to the feedstock, withdrawing the solvent fraction from the distillation zone and withdrawing the overhead fraction from the distillation zone.
Patent KR-20000016039-A (KR)
Title: Revolving electric device including high voltage fixer winding and extended winding supporter and fabricating method thereof
Inventor: LEIJON MATS
IPC: H02K3/48
Filed: 1997-05-27
Abstract: PURPOSE: A revolving electric device is provided to prevent influence on mechanical defect caused by vibration of a cable and allow thermal expansion of the cable. CONSTITUTION: The device comprises a fixer(1) having a winding(6) pulled through a slot(5) therein. At least one winding(6) includes an insulating system having at least two semiconductor layers(32, 34). Each of the layers(32, 34) is essentially composed of a top surface of a coin and includes a solid insulator(33) therebetween. Supporting members(13, 113, 212, 213) are arranged and contacted along the winding(6). At least one of the layers(32, 34) is equal to the solid insulator(33) in a thermal expansion coefficient.