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Process for preparing high-purity acetylacetone

A technology for the preparation of acetylacetone, which is applied in the field of high-purity acetylacetone preparation technology, can solve the problems of dependence on imports and low purity, and achieve the effects of less equipment investment, high product purity, and shortened process flow

Inactive Publication Date: 2006-10-25
王龙集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So as to solve the problem of low purity of products produced in the existing domestic process and long-term dependence on imports, and meet the needs of domestic and foreign customers

Method used

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  • Process for preparing high-purity acetylacetone

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 Shown, the brief description of acetylacetone production process: high-purity acetylacetone preparation process,

[0027] A preparation process containing ketene,

[0028] The first step: the dilute acetic acid from the first cooling separation process and the second cooling separation process is collected through the dilute acetic acid collection process, and then concentrated by 80% through the dilute acetic acid concentration process, and the concentration is 80% acetic acid and 99% ice Acetic acid is formulated into 85% to 95% acetic acid, the 85% to 95% acetic acid is mixed with about 10% by weight triethyl phosphate in a ratio of 10:1, and the mixture passes through a cracking furnace process of 700°C to 1000°C at high temperature Cracking, acetic acid is thermally cracked into acetic acid cracking gas mixed wit...

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Abstract

This invention relates to high purity acetylacetone preparation method, it contains ketene preparation method, acetone esterification technique, ester liquor distillation and isomerization technique and acetylacetone rectification technique. Acetone selected from fresh acetone process is mixed with crude distilled and unreacted acetone selected from recovery process through acetone matching process, and then they are cooled by cryogen. Cold acetone prepared during matching process is filled into esterifying kettle, stibium, cobalt and manganese complex esterification catalyst are added, and pure ketene is filled into the kettle and is absorbed by esterification system. The catalysts in synthesized mixed ester liquor is eliminated through filtration separator process, the ester liquor from filtration is filled into crude steam kettle for crude steaming, then it is filled into acetic acid iso propylene ester process to get acetic acid iso-propylene ester. Then the ester get is filled into isomerization kettle for isomerization, muriate acid is added and temperature is risen, then crude acetylacetone is got after the acetic acid iso propylene ester rearrangement. High purity acetylacetone is got after rectification.

Description

technical field [0001] The invention relates to a process for preparing organic chemical products, in particular to a process for preparing high-purity acetylacetone. Background technique [0002] High-purity acetylacetone is an organic chemical product with a wide range of applications. It is widely used in medicine, veterinary medicine, feed additives, catalysts and other fields. There is no disclosed high-purity acetylacetone production process technology in the prior art, and it is in a state of technical secrecy. The purification of the ketene gas that contains in the relevant traditional technology adopts the inert solvent washing method, and the production cost is high, and equipment investment is big; There are many reactions, and the purity of the product is low; the rearrangement catalysts such as highly dispersed molybdenum, tetramethylaluminum, and boron trifluoride are complicated and rare, and the cost is high. [0003] The high-purity acetylacetone productio...

Claims

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Application Information

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IPC IPC(8): C07C45/76C07C49/14
Inventor 王国军王捍东
Owner 王龙集团有限公司
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