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公开(公告)号：US10315973B2
公开(公告)日：2019-06-11
申请号：US15763296
申请日：2015-12-08
发明人： Youming Ni , Wenliang Zhu , Yong Liu , Hongchao Liu , Lei Shi , Zhongmin Liu
IPC分类号： C07C29/10 , C07C31/20 , B01J29/70 , B01J39/05 , B01J29/08 , B01J29/18 , B01J29/40 , B01J29/65 , B01J31/02
摘要： This invention provides a method for preparing ethylene glycol by hydrolyzing 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 hydrolyzing ethylene glycol monomethyl ether. This invention provides a new process to realize the preparation of ethylene glycol by hydrolyzing ethylene glycol monomethyl ether. And in the method, the catalyst has long life and good stability.
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公开(公告)号：US11111200B2
公开(公告)日：2021-09-07
申请号：US16463415
申请日：2016-11-25
发明人： Lei Shi , Zongmin Liu , Youming In , Wenliang Zhu , Yong Liu , Hongchao Liu
IPC分类号： C07C51/12 , B01J29/18 , B01J29/40 , B01J29/65 , B01J29/70 , C07C67/37 , C07C57/04 , C07C69/54
摘要： The present invention provides a method for preparing acrylic acid and methyl acrylate. The method comprises passing the feed gas containing dimethoxymethane and carbon monoxide through a solid acid catalyst to generate acrylic acid and methyl acrylate with a high conversion rate and selectivity at a reaction temperature in a range from 180 to 400 and a reaction pressure in a range from 0.1 MPa to 15.0 MPa, the mass space velocity of dimethoxymethane in the feed gas is in a range from 0.05 h−1 to 10.0 h−1, and the volume percentage of dimethoxymethane in the feed gas is in a range from 0.1% to 95%.
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公开(公告)号：US10532969B2
公开(公告)日：2020-01-14
申请号：US15763318
申请日：2015-12-11
发明人： Lei Shi , Youming Ni , Wenliang Zhu , Yong Liu , Hongchao Liu , Zhongmin Liu
摘要： The present invention provides a method for directly preparing glycol dimethyl ether and co-producing ethylene glycol from ethylene glycol monomethyl ether. More specifically, the method comprises passing a feedstock containing a raw material of ethylene glycol monomethyl ether and a carrier gas through a reactor loaded with a solid acid catalyst to produce glycol dimethyl ether and ethylene glycol, at a reaction temperature range from 40° C. to 150° C. and a reaction pressure range from 0.1 MPa to 15.0 MPa; wherein a carrier gas is an optional inactive gas; and the feedstock contains water whose volume concentration in the feedstock is in a range from 0% to 95%; and the weight hourly space velocity of the raw material of ethylene glycol monomethyl ether is in a range from 0.05 h−1 to 5.0 h−1; and the volume concentration of the raw material of ethylene glycol monomethyl ether in the feedstock is in a range from 1% to 100%; and the volume concentration of the carrier gas in the feedstock is in a range from 0% to 99%. In the method of the present invention, using a solid acid as a catalyst and ethylene glycol monomethyl ether as a raw material, under a low temperature condition, glycol dimethyl ether and ethylene glycol are prepared directly with high selectivity; moreover, there is substantially or completely no production of by-product 1,4-dioxane that causes pollution to the environment and is harmful to the human body or animal bodies.
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公开(公告)号：US10370318B2
公开(公告)日：2019-08-06
申请号：US15758572
申请日：2015-12-08
发明人： Youming Ni , Wenliang Zhu , Lei Shi , Hongchao Liu , Yong Liu , Zhongmin Liu
IPC分类号： C07C53/08 , C07C51/12 , B01J29/18 , B01J29/24 , B01J29/65 , B01J29/67 , B01J31/02 , B01J31/26 , B01J37/00 , B01J37/02 , B01J37/08 , B01J37/30 , B01J29/00
摘要： The present invention provides a method for preparing acetic acid by carbonylation of methanol, which comprises: passing a raw material containing methanol, carbon monoxide and water through a reaction region loaded with a catalyst containing an acidic molecular sieve with an adsorbed organic amine, and carrying out a reaction under the following conditions to prepare acetic acid. The method in the present invention offers high acetic acid selectivity and good catalyst stability. The catalyst in the present invention does not contain noble metals such as rhodium or iridium, and does not need additional agent containing iodine, and thus does not generate a strong corrosive hydroiodic acid and the like.
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