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Method for preparing purified MIBK (methyl isobutyl ketone) from industrial byproduct waste acetone liquor

An industrial by-product and acetone technology, which is applied in the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of increased separation difficulty, no literature reports, complex product composition, etc., and achieve the effect of promoting stratification , the effect of reducing the amount of loss

Active Publication Date: 2018-04-17
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, the composition of the product is more complex, and the separation difficulty is increased compared with the traditional process.
[0006] At present, the purification process for MIBK is all aimed at the MIBK product prepared by pure acetone one-step method, and there is no literature report on the purification of MIBK prepared from industrial by-product waste liquid acetone. A new approach to MIBK

Method used

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  • Method for preparing purified MIBK (methyl isobutyl ketone) from industrial byproduct waste acetone liquor
  • Method for preparing purified MIBK (methyl isobutyl ketone) from industrial byproduct waste acetone liquor
  • Method for preparing purified MIBK (methyl isobutyl ketone) from industrial byproduct waste acetone liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] As shown in the flow process of accompanying drawing, carry out rectification by the rectification condition of table 4 and table 5 after the dehydrogenation of reaction synthesis liquid, wherein the extractant of delight component tower is water, and the mass ratio of consumption and feed liquid is 3:1, added in the second theoretical plate, wherein the height ratio of packing A and packing B in the liquid-liquid stratifier on one side of the dehydration tower is 1:4, and the results are shown in Table 6. It can be seen from Table 6 that the mass fraction of MIBK product finally obtained is 99.56% through the rectification of each rectification column.

[0063] The preparation method of filler A and filler B is as follows: the stainless steel filler is put into potassium permanganate sulfuric acid solution for 18 hours, and then washed with deionized water until neutral to obtain filler A. Spray polytetrafluoroethylene emulsion and sulfonated polyimide emulsion on the ...

Embodiment 2

[0072] As shown in the flow process of accompanying drawing, carry out rectification by the rectification condition of table 7 and table 8 after the dehydrogenation of reaction synthesis liquid, wherein the extractant of delight component tower is water, and the mass ratio of consumption and feed liquid is 2:1, added in the fifth theoretical plate, wherein the height ratio of packing A and packing B in the liquid-liquid stratifier on one side of the dehydration tower is 1:1, and the results are shown in Table 9. It can be seen from Table 9 that the mass fraction of MIBK product finally obtained is 99.67% through the rectification of each rectification column. The preparation method of filler A and filler B is shown in Example 1.

[0073] The rectification condition of table 7 rectification column

[0074] Distillation column

C-100

C-101

C-103

C-104

C-105

Theoretical number of boards

30

100

55

20

5

Feed position

20

40...

Embodiment 3

[0082] As shown in the flow process of accompanying drawing, carry out rectification by the rectification condition of table 10 and table 11 after the dehydrogenation of reaction synthesis liquid, wherein the extractant of delight component tower is water, and the mass ratio of consumption and feed liquid is 0.1, added on the 20th theoretical plate, the extractant of the acetone recovery tower is water, the mass ratio of the dosage to the feed liquid is 0.3, added on the second theoretical plate, wherein the liquid-liquid separation on the plate on one side of the dehydration tower The height ratio of packing A and packing B in the stratifier is 1:4, and the results are shown in Table 12. It can be seen from Table 12 that the mass fraction of the MIBK product finally obtained through the rectification of each rectification column is 99.72%.

[0083] The rectification condition of table 10 rectification column

[0084] Distillation column

C-100

C-101

C-103

...

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Abstract

The invention discloses a technological process for preparing high-purity MIBK (methyl isobutyl ketone) from industrial byproduct waste acetone liquor. The method comprises the steps as follows: a reaction liquid of MIBK is synthesized from waste acetone liquor, a light component with the boiling point lower than that of acetone is obtained at the top of a light component removal tower, and unreacted acetone is obtained at the top of an acetone recovery tower; an organic matter with the boiling point lower than that of an MIBK / water azeotrope and the MIBK / water azeotrope are obtained at the top of a process water tower; low-boiling-point organic matter such as acetone, methanol and the like coming from raw materials are obtained at the top of a dehydrating tower; an alcohol / water distillate is obtained at the top of an alcohol removal tower and a crude MIBK distillate is obtained from the tower; a light component with the boiling point lower than that of MIBK is obtained at the top ofan MIBK refining tower and an MIBK product with the purity larger than or equal to 99.5% is obtained on the side. The technology is simple, low in energy consumption and low in production cost, the high-purity MIBK product can be obtained from high-impurity waste acetone liquor, and the economic benefits are significant.

Description

technical field [0001] The invention relates to a production method of purified MIBK, in particular to a method for producing purified MIBK from industrial by-product waste liquid acetone. technical background [0002] The co-oxidation propylene oxide process is the mainstream process for industrial production of propylene oxide, including PO / TBA process and PO / SM process. Currently, the global PO plant production capacity is about 10 million tons per year, of which the co-oxidation process accounts for about 55%. ~60%. Because the oxidation reaction of the co-oxidation method is a free radical reaction, the intermediate product is extremely active and the product is relatively complex. A large amount of waste liquid is a by-product of industrial co-oxidation propylene oxide plant. The composition of this waste liquid is complex. Apart from a large amount of acetone, the main impurities are isobutane oxide, methanol, tert-butanol, etc. Due to the small difference in boiling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/73C07C45/78C07C45/83C07C45/80C07C49/04
CPCC07C45/73C07C45/78C07C45/80C07C45/83C07C49/04
Inventor 吕艳红何岩黄少峰董龙跃刘振峰袁帅王中华张林飞王文李文滨黎源
Owner WANHUA CHEM GRP CO LTD
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