Technology for preparing acetic esterand device thereof

Abstract

The invention relates to technology for preparing acetic ester and a device thereof. The technology for preparing the acetic estercomprises the steps of esterification and product rectification, the device comprises an esterification kettle, an acetic acid input pipeline, and an alcohol raw material input pipeline, the acetic acid input pipeline and the alcohol raw material input pipeline communicate with the bottom of the esterification kettle respectively,the device further comprises a primary rectification column and a secondary rectification column, the middle of the esterification kettlecommunicates with the primary rectification column through a connecting pipeline, the bottom of the primary rectification column communicates withthe middle of the secondary rectification column through the connecting pipeline, andacetate output pipelines are arranged at the tops of the primary rectification column and the secondary rectification column respectively. According to the technical scheme, thetechnology for preparing the acetic ester and the device thereofare suitable for preparation as a supporting raw material for a carbonylation synthesizing acetic anhydride device,in the case of constant raw materials, concentrated sulfuric acid is eliminated as a catalyst, the conversion rate is high, the deviceis lightly corroded, and the problem of sulfur content in production wastewateris effectively solved.

Description

technical field [0001] The invention relates to a manufacturing process of chemical products, in particular to a process for preparing acetate and equipment thereof. Background technique [0002] At present, the acetic acid esterification reaction basically adopts the traditional process of using acetic acid and corresponding alcohols as raw materials and concentrated sulfuric acid as a catalyst. Due to the strong oxidizing property of concentrated sulfuric acid, side reactions are prone to occur, and at the same time, the equipment is severely corroded, especially Reactors and pump pipelines; during production, a large amount of acid-containing wastewater is also produced, especially these acid-containing wastewater contains sulfur, which is very stressful for the subsequent treatment of wastewater. Contents of the invention [0003] In view of this, the main purpose of the present invention is to provide a process for preparing acetate and its equipment. Through this tec...

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Problems solved by technology

[0002] At present, the acetic acid esterification reaction basically adopts the traditional process of using acetic acid and corresponding alcohols as raw materials and concentrated sulfuric acid as a catalyst. Due to the strong oxidizing property of concentrated sulfuric acid, side reactions are prone to occur, and at the same time, the equipment is severely corroded, especially Reactor and pump pipeline; during production, a large amount of acid-containing wastewater is also produced, especially these acid-containing wastewater contains sulfur, which is very stressful for the subsequent treatment of wastewater

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