-
公开(公告)号：US12071387B2
公开(公告)日：2024-08-27
申请号：US18211391
申请日：2023-06-19
申请人： TIANJIN UNIVERSITY
发明人： Minhua Zhang , Hao Gong , He Dong , Feng Shi , Fang Meng , Yingzhe Yu , Haoxi Jiang
CPC分类号： C07C1/24 , C07C7/04 , C09K5/042 , C07C7/12 , C09K2205/12
摘要： The present disclosure relates to a thermal coupling method for preparing ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system and an ethylene purification and propylene refrigeration cycle system; ethanol dehydration reaction products in the ethanol dehydration reaction system serve as a heat source for preheating, vaporization and superheating of a raw material of ethanol; tower bottoms of an evaporation tower in the quenching compression system serve as a heat source for preheating of a feed stream of the evaporation tower and heating of an overhead gas of a quenching tower; products of ethylene in the alkaline washing system serve as a cold source for cooling of crude ethylene.
-
公开(公告)号：US11939286B2
公开(公告)日：2024-03-26
申请号：US18023300
申请日：2021-09-23
申请人： TIANJIN UNIVERSITY
发明人： Minhua Zhang , Zhongfeng Geng , He Dong , Hao Gong , Yingzhe Yu , Shenghua Qian , Xiuqin Dong
摘要： The present disclosure relates to a method for producing vinyl acetate, comprising a vinyl acetate synthesis process, a vinyl acetate refining process and a separation process of vinyl acetate and ethyl acetate, including an acetic acid evaporator, an oxygen mixer, a vinyl acetate synthesis reactor, a first gas separating tower, a second gas separating tower, a recovered gas compressor, a water washing tower, an absorption tower and a desorption tower, a recycling gas compressor; the vinyl acetate refining process comprising an acetic acid tower, a crude VAC tower, and a fine VAC tower, a rectifying tower, an ethyl acetate tower, a water phase receiving tank, an extracting and rectifying tower and an ethyl acetate phase separator.
-
公开(公告)号：US20240158333A1
公开(公告)日：2024-05-16
申请号：US18235136
申请日：2023-08-17
申请人： TIANJIN UNIVERSITY
发明人： Minhua Zhang , Hao Gong , He Dong , Zhongfeng Geng , Yingzhe Yu
CPC分类号： C07C67/05 , B01J19/0013
摘要： The present disclosure relates to a process and a device for producing vinyl acetate by an ethylene process. By additionally arranging an ethylene recovery membrane assembly in a vinyl acetate synthesis section, the content of inert components such as nitrogen in a circulating system is controlled, ethylene gas is recovered from non-condensable gas, and a recovery rate of the ethylene reaches 58% or above. By adding sideline extraction at a refined VAC tower in a vinyl acetate refining section, a vinyl acetate product with purity higher than 99.98% is obtained, a mass fraction of acetic acid is less than or equal to 20 ppm, a mass fraction of acetaldehyde is less than or equal to 20 ppm, and a mass fraction of water is less than or equal to 100 ppm. In synthesis and refining processes of the vinyl acetate, a cooling method is adopted.
-
公开(公告)号：US12049442B2
公开(公告)日：2024-07-30
申请号：US18235136
申请日：2023-08-17
申请人： TIANJIN UNIVERSITY
发明人： Minhua Zhang , Hao Gong , He Dong , Zhongfeng Geng , Yingzhe Yu
CPC分类号： C07C67/05 , B01D53/22 , B01J19/0013 , B01D2311/25
摘要： The present disclosure relates to a process and a device for producing vinyl acetate by an ethylene process. By additionally arranging an ethylene recovery membrane assembly in a vinyl acetate synthesis section, the content of inert components such as nitrogen in a circulating system is controlled, ethylene gas is recovered from non-condensable gas, and a recovery rate of the ethylene reaches 58% or above. By adding sideline extraction at a refined VAC tower in a vinyl acetate refining section, a vinyl acetate product with purity higher than 99.98% is obtained, a mass fraction of acetic acid is less than or equal to 20 ppm, a mass fraction of acetaldehyde is less than or equal to 20 ppm, and a mass fraction of water is less than or equal to 100 ppm. In synthesis and refining processes of the vinyl acetate, a cooling method is adopted.
-
-
-
搜索结果
4 条记录 (耗时 0.014 秒)
