PATENT CLAIM ANALYSIS

Application Number: 16085397
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-03
Patent Classification: ["518", "719000"]

Abstract:
A method for preparing aromatic hydrocarbons with carbon dioxide hydrogenation, comprising: directly converting a mixed gas consisting of carbon dioxide and hydrogen with the catalysis of a composite catalyst under reaction conditions of a temperature of 250-450° C., a pressure of 0.01-10.0 MPa, a feedstock gas hourly space velocity of 500-50000 mL/(h·g cat ) and a H 2 /CO 2  molar ratio of 0.5-8.0, to produce aromatic hydrocarbons. The composite catalyst is a mixture of a first component and a second component. The first component is an iron-based catalyst for making low-carbon olefin via carbon dioxide hydrogenation, and the second component is at least one of metal modified or non-modified molecular sieves which are mainly used for olefin aromatization. In the method, CO 2  conversion per pass may be above 33%, the hydrocarbon product selectivity may be controlled to be above 80%, the methane content is lower than 8%, C 5+  hydrocarbon content is higher than 65% and the proportion of the aromatic hydrocarbons in C 5+  hydrocarbons may be above 63%.

Claim (Index 4):
The method according to  claim 1  comprising one of the following processes to make the iron-based catalyst, and the Fe 3 O 4  active component is used as an example to describe specific steps:\n A. the catalyst is prepared by a one-step synthesis method which comprises the following steps: \n (1) mixing soluble Fe (II) salt and soluble Fe (III) salt to form a salt solution or mixing soluble Fe (II) salt, soluble Fe (III) salt and auxiliary salt to form a salt solution in accordance with a catalyst composition ratio, the concentration of Fe (III) in the salt solution being 0.02-0.8 mol/L; adding HCl solution with a concentration of 3-12.1 mol/L; regulating a pH value to 0-3, wherein the molar ratio of Fe(III) to Fe(II) in the salt solution is 2:(0.8-2.8); the soluble Fe (II) salt and the soluble Fe (III) salt mean water-soluble salt compounds, and preferably are one or more than two of chlorid, nitrate and acetate; and the auxiliary salt is a water-soluble salt compound, and preferably are one or more than two of chlorid, nitrate and acetate; \n (2) adding aqueous alkali to (1); gradually regulating the pH value of the solution to 0-3 until the alkaline pH value is 9-12; after completing dripping, ageing for 1-10 h, wherein the aqueous alkali means an alkali solution with an adjustable pH value, and preferably is one or more than two of NaOH, KOH, Na 2 CO 3 , NaHCO 3 , K 2 CO 3 , KHCO 3 , Na 2 C 2 O 4 , K 2 C 2 O 4 , RCOONa, RCOOK and ammonium hydroxide; the concentration of the aqueous alkali is 0.1-8 mol/L, wherein R refers to an organo-functional group and comprises C 1 -C 20  alkyl, C 1 -C 20  alkenyl or C 6 -C 20  aryl, and preferably is methyl, ethyl or phenyl; \n (3) after completing the reaction, separating deposited products from (2) through magnetic field absorption, centrifugal or sucking filtration method; adequately washing the deposited products with deionized water, drying, roasting or not roasting at a roasting temperature of 200-600\u00b0 C. for a roasting time of 2-10 h, to prepare the iron-based catalyst containing the auxiliary; \n B. or the catalyst is prepared by a one-step synthesis method which comprises the following steps: \n (1) mixing soluble Fe (II) salt and soluble Fe (III) salt to form a salt solution in accordance with a catalyst composition ratio, the concentration of Fe (III) in the salt solution being 0.02-0.8 mol/L; adding HCl solution with a concentration of 3-12.1 mol/L; and regulating a pH value to 0-3, wherein the molar ratio of Fe(III) to Fe(II) in the salt solution is 2:(0.8-2.8); \n (2) adding aqueous alkali containing Na or K in A method to (1); gradually regulating the pH value of the solution to 0-3 until the alkaline pH value is 9-12; and after completing dripping, ageing for 1-10 h; \n (3) after completing the reaction, separating deposited products from (2) through magnetic field absorption, centrifugal or sucking filtration method; washing the deposited products with deionized water; controlling the content of remaining Na or K in the catalyst by controlling washing times and water consumption per washing; drying, roasting or not roasting at a roasting temperature of 200-600\u00b0 C. for a roasting time of 2-10 h, to prepare the iron-based catalyst containing the auxiliary; \n C. or the catalyst is prepared by synthesizing Fe 3 O 4  through a coprecipitation method and adding the auxiliary through an immersion method, comprising the following steps: \n (1) mixing soluble Fe (II) salt and soluble Fe (III) salt to form a salt solution in accordance with a catalyst composition ratio, the concentration of Fe (III) in the salt solution being 0.02-0.8 mol/L; adding HCl solution with a concentration of 3-12.1 mol/L; and regulating a pH value to 0-3, wherein the molar ratio of Fe(III) to Fe(II) in the salt solution is 2:(0.8-2.8); \n (2) adding the aqueous alkali in A method to (1); gradually regulating the pH value of the solution to 0-3 until the alkaline pH value is 9-12; and after completing dripping, ageing for 1-10 h; \n (3) after completing the reaction, separating deposited products from (2) through magnetic field absorption, centrifugal or sucking filtration method; adequately washing the deposited products with deionized water, and drying, to prepare the active component Fe 3 O 4 ; \n (4) combining the auxiliary salt with the active component through the immersion method to form a catalyst, specifically: computing the amount of theoretically required auxiliary salt according to the required auxiliary content to prepare an aqueous solution of the auxiliary salt; immersing equal volume of Fe 3 O 4  obtained in preparation of (3) into the solution; stirring, standing, drying and roasting at a roasting temperature of 200-600\u00b0 C. for a roasting time of 2-10 h, to prepare the iron-based catalyst containing the auxiliary.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 97.0
- Lexical Diversity: 1.80374
- Patent Class: 518.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16069262', '16087229', '12166153', '13072683', '15737976']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6553717317058911
- 35 USC 102 Novelty (BERT): 0.5511121398865376
- Combined Prediction Score: 0.6449457725239558
- Mean Citation Score: 238.528066
- Max Citation Score: 313.21063
- Similarity Product: 242.3042183261645

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test