公开(公告)号：US20230312452A1

公开(公告)日：2023-10-05

申请号：US18023300

申请日：2021-09-23

Applicant: TIANJIN UNIVERSITY

Inventor： Minhua ZHANG ,  Zhongfeng GENG ,  He DONG ,  Hao GONG ,  Yingzhe YU ,  Shenghua QIAN ,  Xiuqin DONG

IPC: C07C67/05 ,  C07C67/54

CPC classification number: C07C67/05 ,  C07C67/54

Abstract: 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：US20230312456A1

公开(公告)日：2023-10-05

申请号：US18023293

申请日：2021-09-23

Applicant: TIANJIN UNIVERSITY

Inventor： Minhua ZHANG ,  Yingzhe YU ,  Hao GONG ,  He DONG ,  Sheng WANG ,  Cheng LIU ,  Xiuqin DONG

IPC: C07C69/15 ,  B01J7/00

CPC classification number: C07C69/15 ,  B01J7/00

Abstract: The present disclosure relates to a vinyl acetate production process and device. By arranging a stabilizing process, an acetic acid recovery system and a desorption system and device, the composition of circulating gas is changed, the explosion range is narrowed, the volume fraction of maximum permissible oxygen at an inlet of a reactor is increased under the same production load and the same catalyst condition, the safety of the production process is improved, and the conversion per pass across the reaction is increased; and meanwhile, a material separation sequence is reasonably segmented according to an actual production condition. The present disclosure arranges a first gas separating tower which recovers surplus heat of reaction gas, reduces the energy consumption of the system, and therefore the energy consumption throughout the production flow process is reduced; the present disclosure further arranges the acetic acid recovery system.