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公开(公告)号：US20210246093A1
公开(公告)日：2021-08-12
申请号：US17054894
申请日：2018-08-01
Inventor： Youming NI , Wenliang ZHU , Zhongmin LIU , Yong LIU , Hongchao LIU , Xiangang MA , Shiping LIU
Abstract: Provided is a method for directly preparing dimethyl ether by synthesis gas, the method comprises: the synthesis gas is passed through a reaction zone carrying a catalyst, and reacted under the reaction conditions sufficient to convert at least a portion of the raw materials to obtain the reaction effluent comprising dimethyl ether; and the dimethyl ether is separated from the reaction effluent, wherein the catalyst is zinc aluminum spinel oxide. In the present invention, only one zinc aluminum spinel oxide catalyst is used, which can make the synthesis gas to highly selectively form dimethyl ether, the catalyst has good stability and can be regenerated. The method of the present invention realizes the production of dimethyl ether in one step by the synthesis gas, and reduces the large energy consumption problem caused by step-by-step production.
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公开(公告)号：US20200231523A1
公开(公告)日：2020-07-23
申请号：US16647585
申请日：2017-09-29
Inventor： Hongchao LIU , Wenliang ZHU , Zhongmin LIU , Yong LIU , Shiping LIU , Fuli WEN , Youming NI , Xiangang MA
IPC: C07C29/154 , B01J19/18
Abstract: A method for directly producing ethanol from syngas, carried out in three reaction zones, including: feeding a raw material containing syngas and dimethyl ether into a first reaction zone to contact with a solid acid catalyst, reacting; allowing the effluent from the first reaction zone to enter a second reaction zone to contact with a metal catalyst and react; separating the effluent from the second reaction zone to obtain product ethanol and by-product methanol; allowing by-product methanol to enter a third reaction zone to perform a dehydration reaction to obtain dimethyl ether, and allowing the obtained dimethyl ether to enter the first reaction zone to recycle the reaction. This provides a novel method for directly converting syngas to ethanol and an ethanol product can be directly produced by using syngas as a raw material.
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公开(公告)号：US20180370896A1
公开(公告)日：2018-12-27
申请号：US15743936
申请日：2015-12-08
Inventor： Hongchao LIU , Wenliang ZHU , Yong LIU , Youming NI , Zhongmin LIU , Linying WANG , Peng TIAN
IPC: C07C67/37 , C07C51/377 , C07C29/147 , B01J29/76 , B01J29/74 , B01J29/70
Abstract: The present invention provides a method for producing methyl acetate, and the method comprises a step in which dimethyl ether and a raw gas containing carbon monoxide and hydrogen go through a reactor loaded with a catalyst for carrying out a carbonylation reaction; wherein the catalyst contains an acidic EMT zeolite molecular sieve. The present invention has provided a new method for producing methyl acetate. In the method of the present invention, the carbonylation is carried out in the presence of the catalyst containing the acidic EMT zeolite molecular sieve, and the reaction activity is high, and the stability has been significantly improved, meeting the requirement of industrial production.
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公开(公告)号：US20180201557A1
公开(公告)日：2018-07-19
申请号：US15763296
申请日：2015-12-08
Inventor： Youming NI , Wenliang ZHU , Yong LIU , Hongchao LIU , Lei SHI , Zhongmin LIU
IPC: C07C29/10 , C07C31/20 , B01J29/08 , B01J29/18 , B01J29/40 , B01J29/65 , B01J29/70 , B01J31/02 , B01J39/05
CPC classification number: C07C29/10 , B01J29/088 , B01J29/185 , B01J29/405 , B01J29/655 , B01J29/70 , B01J29/7057 , B01J29/7088 , B01J31/0227 , B01J39/05 , C07C31/202 , C07C2529/08 , C07C2529/18 , C07C2529/40 , C07C2529/65 , C07C2529/70 , C07C2531/025 , Y02P20/52
Abstract: This invention provides a method for preparing ethylene glycol by hydrolysing ethylene glycol monomethyl ether. The method comprises passing a fresh raw material containing ethylene glycol monomethyl ether and water through a reaction zone loaded with a solid acid catalyst to react under the following conditions; separating the reacted mixture via a separation system to obtain a target product of ethylene glycol, by-products containing methanol, dimethyl ether and ethylene glycol-based derivatives, and an unreacted raw material containing ethylene glycol monomethyl ether and water; passing the target product of ethylene glycol into a product collection system; and passing methyl alcohol and dimethyl ether in the by-products into a by-product collection system; and after being mixed with the fresh raw materials containing ethylene glycol monomethyl ether and water, the ethylene glycol-based derivatives in the by-products and the unreacted raw material containing ethylene glycol monomethyl ether and water being recycled into the reaction zone, to realize the preparation of ethylene glycol by hydrolysing ethylene glycol monomethyl ether. This invention provides a new process to realize the preparation of ethylene glycol by hydrolysing ethylene glycol monomethyl ether. And in the method, the catalyst has long life and good stability.
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5.发明公开公开(公告)号：US20240109833A1
公开(公告)日：2024-04-04
申请号：US18275444
申请日：2021-02-03
Inventor： Youming NI , Wenliang ZHU , Zhongmin LIU
IPC: C07C51/377 , C07C67/31
CPC classification number: C07C51/377 , C07C67/31
Abstract: A method for preparing glycolic acid and methyl glycolate through hydrolysis of methyl methoxyacetate and methoxyacetic acid is provided. The method includes allowing raw materials including methyl methoxyacetate, methoxyacetic acid, and water to contact and react with a catalyst to produce glycolic acid and methyl glycolate, where the catalyst is at least one selected from the group consisting of a solid acid catalyst, a liquid acid catalyst, a solid base catalyst, and a liquid base catalyst. The method for preparing glycolic acid and methyl glycolate in the present application can be implemented by a traditional fixed-bed reactor, tank reactor, or catalytic distillation reactor under an atmospheric pressure, which is very suitable for continuous production.
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Patent Agency Ranking
公开(公告)号：US20200270188A1
公开(公告)日：2020-08-27
申请号：US16763015
申请日：2017-11-21
Inventor： Youming NI , Wenliang ZHU , Zhongmin LIU , Yong LIU , Zhiyang CHEN , Hongchao LIU , Xiangang MA , Shiping LIU
IPC: C07C2/86 , B01J35/02 , B01J37/04 , B01J37/03 , B01J37/08 , B01J37/06 , B01J37/02 , B01J37/00 , B01J29/48 , B01J29/40 , B01J29/46 , B01J21/18
Abstract: A method for directly preparing p-xylene from synthetic gas and aromatic hydrocarbon. The method includes contacting the feedstock containing synthetic gas and aromatic hydrocarbon excluding p-xylene with the catalyst in the reaction zone under reaction conditions sufficient to convert at least part of the feedstock to obtain a reaction effluent containing p-xylene; and separating p-xylene from the reaction effluent, where the catalyst includes a highly dispersed metal oxide material confined by an inert carrier, an acidic molecular sieve, and optionally at least one of graphite powder and dispersant, where in the highly dispersed metal oxide material confined by the inert carrier, the inert carrier is at least one of silicon oxide and alumina, and the content of the metal oxide in terms of metal is less than or equal to 10% by mass calculated based on the weight of the highly dispersed metal oxide material confined by the inert carrier.
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公开(公告)号：US20190262811A1
公开(公告)日：2019-08-29
申请号：US16343870
申请日：2017-08-22
Inventor： Youming NI , Wenliang ZHU , Zhongmin LIU , Zhiyang CHEN , Yong LIU , Hongchao LIU , Xiangang MA , Shiping LIU
IPC: B01J29/40 , B01J29/48 , B01J29/46 , B01J29/44 , B01J29/90 , B01J38/12 , B01J37/04 , B01J23/00 , B01J37/03 , C01B39/02 , C07C1/04
Abstract: A catalyst for synthesizing aromatic hydrocarbons, a preparation method thereof and a method for synthesizing aromatic hydrocarbons by using the catalyst. The catalyst comprises acidic molecular sieve particles and zinc-aluminum composite oxide particles. The catalyst has relatively high selectivity to aromatic hydrocarbons, particularly BTX, stable performance, and a long single-pass life.
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公开(公告)号：US20170334818A1
公开(公告)日：2017-11-23
申请号：US15537928
申请日：2014-12-22
Inventor： Youming NI , Wenliang ZHU , Hongchao LIU , Yong LIU , Zhongmin LIU , Lina LI , Shiping LIU , Hui Zhou
CPC classification number: C07C41/14 , B01J29/084 , B01J29/18 , B01J29/40 , B01J29/65 , B01J29/7007 , B01J29/7038 , C07C43/10 , Y02P20/584
Abstract: Disclosed is a method for preparing a double end capped glycol ether, the method comprising: introducing into a reactor a raw material comprising a glycol monoether and a monohydric alcohol ether, and enabling the raw material to contact and react with an acidic molecular sieve catalyst to generate a double end capped glycol ether, a reaction temperature being 50-300° C., a reaction pressure being 0.1-15 MPa, a WHSV of the glycol monoether in the raw material being 0.01-15.0 h−1, and a mole ratio of the monohydric alcohol ether to the glycol monoether in the raw material being 1-100:1. The method of the present invention enables a long single-pass lifespan of the catalyst and repeated regeneration, has a high yield and selectivity of a target product, low energy consumption during separation of the product, a high economic value of a by-product, and is flexible in production scale and application.
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公开(公告)号：US20250051257A1
公开(公告)日：2025-02-13
申请号：US18719245
申请日：2022-12-12
Inventor： Youming NI , Wenliang ZHU , Zhongmin LIU
Abstract: A method for preparing a methyl ester compound is provided, including: subjecting a raw material of a carboxyl compound, methanol and/or dimethyl ether to an esterification reaction to obtain the methyl ester compound, where the general formula I of the carboxyl compound is R—CH2—COOH, where R is a methoxy or hydroxyl; and the methyl ester compound comprises at least one of methyl methoxyacetate and methyl glycolate. This application also discloses a method for preparing a methyl glycolate, comprising the steps of: a) subjecting methylal and carbon monoxide to a carbonylation reaction to obtain methyl methoxyacetate; b) subjecting the methyl methoxyacetate and water to a hydrolysis reaction to obtain the methyl glycolate; and c) subjecting glycolic acid, methoxyacetic acid, methanol, and dimethyl ether to an esterification reaction to obtain the methyl glycolate.
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公开(公告)号：US20200239401A1
公开(公告)日：2020-07-30
申请号：US16647174
申请日：2017-09-29
Inventor： Hongchao LIU , Wenliang ZHU , Zhongmin LIU , Yong LIU , Shiping LIU , Fuli WEN , Youming NI , Xiangang MA
IPC: C07C67/36 , C07C51/10 , B01J8/04 , B01J8/06 , B01J23/889 , B01J23/00 , B01J29/40 , B01J29/18 , B01J29/70
Abstract: A method for directly producing methyl acetate and/or acetic acid from syngas, carried out in at least two reaction zones, including: feeding a raw material containing syngas into a first reaction zone to contact and react with a metal catalyst; allowing an obtained effluent to enter a second reaction zone directly or after the addition of carbon monoxide so as to contact and react with a solid acid catalyst; separating the obtained effluent to obtain product of acetate and/or acetic acid, and optionally returning a residual part to enter the first reaction zone and/or the second reaction zone to recycle the reaction. This provides a novel method for directly converting syngas into methyl acetate and/or acetic acid. Further, the product selectivity of the product of methyl acetate or acetic acid is greater than 93%, and the quantity of methyl acetate and acetic acid may be adjusted according to processing.
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