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公开(公告)号：US12036538B2
公开(公告)日：2024-07-16
申请号：US17426979
申请日：2019-02-02
发明人： Hongchao Liu , Shiping Liu , Wenliang Zhu , Zhongmin Liu , Xiangang Ma , Yong Liu , Ziqiao Zhou , Youming Ni
CPC分类号： B01J29/18 , B01J6/001 , B01J2229/16 , B01J2229/37 , B01J2229/38
摘要： Provided are a molecular sieve catalyst, a preparation method therefor, an application thereof. The molecular sieve catalyst contains a modified Na-MOR molecular sieve, and the modification comprises: organic ammonium salt exchange, dealumination treatment, and ammonium ion exchange. The catalyst obtained by the method is used in dimethyl ether for one-step production of methyl acetate. The catalyst has high activity and stable performance, and the needs of industrial production can be satisfied.
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公开(公告)号：US11247959B2
公开(公告)日：2022-02-15
申请号：US17054894
申请日：2018-08-01
发明人： Youming Ni , Wenliang Zhu , Zhongmin Liu , Yong Liu , Hongchao Liu , Xiangang Ma , Shiping Liu
IPC分类号： C07C41/01 , B01J8/06 , B01J21/02 , B01J37/00 , B01J37/02 , B01J37/04 , B01J37/06 , B01J37/08
摘要： 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：US11292761B2
公开(公告)日：2022-04-05
申请号：US16647174
申请日：2017-09-29
发明人： Hongchao Liu , Wenliang Zhu , Zhongmin Liu , Yong Liu , Shiping Liu , Fuli Wen , Youming Ni , Xiangang Ma
IPC分类号： B01J8/04 , B01J8/06 , B01J29/70 , C07C51/10 , C07C67/36 , B01J23/00 , B01J23/889 , B01J29/18 , B01J29/40
摘要： 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. By the method above, 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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公开(公告)号：US10919832B2
公开(公告)日：2021-02-16
申请号：US16461120
申请日：2016-11-25
发明人： Zhanling Ma , Wenliang Zhu , Xiangang Ma , Hongchao Liu , Yong Liu , Youming Ni , Shiping Liu , Qiwei Chen , Zhongmin Liu
IPC分类号： C07C51/353 , C07C67/333 , C07C67/343 , B01J29/24 , B01J29/46 , B01J29/68 , B01J29/76 , B01J29/85 , B01J29/70 , B01J29/83 , B01J29/18 , B01J29/80 , B01J29/06 , B01J29/08 , B01J29/65 , C07C69/52 , C07C69/54 , C07C69/533 , C07C57/03 , C07C57/04
摘要： Provided is a method for preparing a lower unsaturated fatty acid ester, which comprises carrying out an aldol condensation reaction between dimethoxymethane (DMM) and a lower acid or ester with a molecular formula of R1—CH2—COO—R2 on an acidic molecular sieve catalyst in an inert atmosphere to obtain a lower unsaturated fatty acid or ester(CH2═C(R1)—COO—R2), wherein R1 and R2 are groups each independently selected from the group consisting of H— and C1-C4 saturated alkyl group.
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公开(公告)号：US11225443B2
公开(公告)日：2022-01-18
申请号：US16763015
申请日：2017-11-21
发明人： Youming Ni , Wenliang Zhu , Zhongmin Liu , Yong Liu , Zhiyang Chen , Hongchao Liu , Xiangang Ma , Shiping Liu
IPC分类号： C07C2/86 , B01J21/18 , B01J29/40 , B01J29/46 , B01J29/48 , B01J35/02 , B01J37/00 , B01J37/02 , B01J37/03 , B01J37/04 , B01J37/06 , B01J37/08
摘要： 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：US11014076B2
公开(公告)日：2021-05-25
申请号：US16343870
申请日：2017-08-22
发明人： Youming Ni , Wenliang Zhu , Zhongmin Liu , Zhiyang Chen , Yong Liu , Hongchao Liu , Xiangang Ma , Shiping Liu
IPC分类号： B01J29/06 , B01J29/40 , B01J23/00 , B01J29/44 , B01J29/46 , B01J29/48 , B01J29/90 , B01J37/03 , B01J37/04 , B01J38/12 , C01B39/02 , C07C1/04 , B01J38/14 , B01J21/06 , B01J21/04 , B01J35/02 , B01J23/72 , B01J23/26 , B01J37/00 , B01J35/00 , B01J38/02 , B01J23/44 , B01J23/06 , B01J23/90 , B01J29/76 , B01J29/08 , B01J29/22 , B01J29/16 , B01J29/18 , B01J29/26 , B01J29/24 , B01J29/70 , B01J29/78 , B01J29/74 , B01J29/72
摘要： 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：US10927051B2
公开(公告)日：2021-02-23
申请号：US16344375
申请日：2017-08-22
发明人： Youming Ni , Wenliang Zhu , Zhongmin Liu , Zhiyang Chen , Yong Liu , Hongchao Liu , Xiangang Ma , Shiping Liu
摘要： Disclosed is a method for preparing aromatic hydrocarbons, particularly relates to the preparation of the aromatic hydrocarbons by passing methanol and carbon monoxide through a reactor loaded with an acidic ZSM-5 molecular sieve catalyst containing no metal additive under reaction conditions. Compared with the prior art, the method provided by the present invention can improve and stabilize the selectivity to aromatic hydrocarbons, particularly BTX, by adding carbon monoxide in methanol aromatization, and also prolongs the single-pass life of the catalyst. The performance of an inactivated catalyst is not significantly degraded after repeated regenerations. Furthermore, the catalyst preparation process omits the step of adding a metal additive, so that not only the process is simplified, but also costs are greatly reduced, and environmental protection is facilitated.
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公开(公告)号：US10815162B2
公开(公告)日：2020-10-27
申请号：US16763026
申请日：2018-10-29
发明人： Youming Ni , Wenliang Zhu , Zhongmin Liu , Yong Liu , Zhiyang Chen , Hongchao Liu , Xiangang Ma , Shiping Liu
IPC分类号： C07C1/04 , B01J35/02 , B01J37/04 , B01J37/08 , B01J37/03 , B01J37/00 , B01J37/06 , B01J37/02 , B01J29/40 , B01J29/48 , B01J29/46 , B01J21/18
摘要： A method for preparing aromatics from syngas, which includes a) contacting a raw material stream containing syngas with a catalyst in a reaction zone under reaction conditions sufficient to convert at least part of the raw material to obtain a reaction effluent; b) separating the reaction effluent to obtain at least a recycle stream containing gas-phase hydrocarbons having 1 to 4 carbon atoms and unconverted syngas and a liquid stream containing hydrocarbons having 5 or more carbon atoms; c) returning the recycle stream to the reaction zone; and d) separating aromatic products from the liquid stream, wherein the catalyst includes at least one of an inert carrier-confined highly dispersed metal oxide material, an acidic molecular sieve, and, optionally, graphite powder and a dispersant.
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