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Method for preparing methyl isobutyl ketone from industrial by-product effluent acetone

A kind of technology of methyl isobutyl ketone and industrial by-product, which is applied in the field of preparing methyl isobutyl ketone from industrial by-product waste liquid acetone

Active Publication Date: 2017-04-19
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts and processes for catalyzing epoxides to obtain tertiary alcohols using the above-mentioned common hydrogenation active elements have not been reported yet

Method used

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  • Method for preparing methyl isobutyl ketone from industrial by-product effluent acetone
  • Method for preparing methyl isobutyl ketone from industrial by-product effluent acetone
  • Method for preparing methyl isobutyl ketone from industrial by-product effluent acetone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Preparation of modified loaded Pd / activated carbon catalyst: 2.08g commercial powdered coconut shell activated carbon, particle size 150 mesh, specific surface area 2500m 2 / g, first at 10Mpa, 600k, H 2 / N 2 Reduced activated carbon 12h, H 2 , N 2 The molar ratio is 1:3. 6.47g Mg(NO 3 ) 2 ·6H 2 O, 0.10gCu(NO 3 ) 2 ·6H 2 O. Dissolve 0.89g of isopropyl titanate into 70.92g of deionized water, and divide the solution into three parts with a weight ratio of 4:2:1. Add ammonia water dropwise to the three solutions respectively to control PH = 9, immerse the above-mentioned activated carbon in the above-mentioned solution three times for 5 hours respectively, after each immersion, age for 12 hours and then perform the next immersion, and continuously evaporate the solvent while immersing, When the impregnation is completed, the remaining solution volume is less than 1% of the original solution volume. In vacuum condition N 2 Dry at 80°C for 12h, then 20Pa, N 2 Roa...

Embodiment 2

[0072] as attached figure 2 Shown, the CSTR reactor R-1 of series connection and fixed-bed reactor R-2, wherein R-1 loads the modified Pd / activated carbon catalyst A2.5g prepared by embodiment 1, R-2 loads Pd / ion exchange resin Composite functional catalyst, the catalyst is spherical particles with a diameter of Ф0.5-1.3, and the filling volume is 300ml. Byproduct waste liquid acetone mixed solution (composition is as table 1) is passed through reactor, reactor R-1 volume 1.5L, overflow volume 1L, byproduct acetone feed rate 6ml / min, H 2 The pressure is 4Mpa, and the reaction temperature is 120°C. Reactor R-2 has an inner diameter of Ф20 and adopts a multi-stage heating insulation system, H 2 The pressure is 3.5Mpa, the flow rate is 120NL / h, and the catalyst bed temperature is 120-140°C. Liquid samples were collected for gas chromatographic analysis. The conversion rate of isobutylene oxide at the outlet of reactor R-1 is 99%, the mass ratio of TBA (tert-butanol) to IBA (...

Embodiment 3

[0081] Such as figure 1As shown, the tube-and-tube reactor R-100 is sequentially filled with 300 ml of Pd / ion exchange resin MIBK synthesis catalyst and 100 ml of molded catalyst B from bottom to top, and the conditions in the reactor are the same as those of R-2 in Example 2. device, other operations and conditions are also the same as in Example 2, and the results are shown in Table 5.

[0082] Table 5 The reaction results of synthesizing MIBK

[0083]

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Abstract

A method for preparing high-purity methyl isobutyl ketone (MIBK) from an industrial by-product effluent acetone comprises the following steps: converting epoxide impurities in the effluent acetone into corresponding tertiary alcohol during the process section I; converting acetone into MIBK during the process section II; and realizing conversion of the above tertiary alcohol and separation from MIBK through reactive distillation. In cooperation of optimal refining process, a high-purity MIBK product can be easily prepared. By the technology, the byproduct effluent acetone is converted into an MIBK product with high added value. The equipment has remarkable economical benefit.

Description

technical field [0001] The invention relates to a method for preparing high-purity methyl isobutyl ketone (MIBK) from industrial by-product waste liquid acetone, and more specifically relates to the direct use of the by-product waste liquid acetone of a co-oxidation propylene oxide plant to prepare MIBK without separation and purification Methods. [0002] technical background [0003] Co-oxidation propylene oxide process is the mainstream process for producing propylene oxide in industry, including PO / TBA process and PO / SM process. Currently, the global production capacity of PO devices reaches 10 million tons per year, of which 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 produced by the industrial co-oxidation propylene oxide plant. The composition of the waste liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/04C07C45/73C07C45/82B01J23/89B01J35/10
CPCC07C45/73C07C45/82B01J23/8926B01J2523/00B01J2523/824B01J2523/22B01J2523/17B01J2523/47B01J35/618B01J35/647C07C49/04Y02P20/10
Inventor 何岩吕艳红黎源姜庆梅杨长巧杨险峰汪小健
Owner WANHUA CHEM GRP CO LTD
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