Method and equipment thereof for synthesizing methyl isobuthl ketone with acetone two-step method

A technology of methyl isobutyl ketone and acetone, which is applied in the field of synthesis of methyl isobutyl ketone, can solve the problems of reduced operating pressure of catalytic rectification tower, increased process complexity, increased by-product generation, etc., and achieves an improved balance Improve the conversion rate, reduce energy consumption, and solve the effect of low oil-water separation efficiency

Active Publication Date: 2018-05-08
长成新能股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These measures have increased the complexity of the process and increased energy consumption; 2) Compared with the one-step pressurized fixed-bed reactor, the operating pressure of th

Method used

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  • Method and equipment thereof for synthesizing methyl isobuthl ketone with acetone two-step method
  • Method and equipment thereof for synthesizing methyl isobuthl ketone with acetone two-step method
  • Method and equipment thereof for synthesizing methyl isobuthl ketone with acetone two-step method

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0055] Example 1

[0056] Use as figure 1 The process flow of the two-step synthesis of methyl isobutyl ketone with acetone is shown.

[0057] The upper part of the catalytic distillation tower is provided with four-stage heterogeneous catalyst layers, and the lower part is provided with six-stage random packing layers.

[0058] The random packing specification θ ring (Ф3), the theoretical number of packing plates is 42, and the heterogeneous catalyst is acid cation exchange resin Amberlyst 15.

[0059] The acetone feedstock F1 enters the catalytic distillation tower from the top of the tower, the DAA-containing material F2 is extracted from the side line between the third and fourth sections of the catalytic distillation tower, and the acetone-rich gas phase F5 is placed on the catalyst bed in the first and second stages of the catalytic distillation tower The liquid phase output F6 from the acetone flash evaporator is circulated back into the tower between the fourth and fifth sect...

Example Embodiment

[0074] Example 2

[0075] The difference from Example 1 is that the DAA decomposition reaction temperature in Example 2 is 140° C. and the pressure is 5.5 bar. Others are the same as those described in Example 1.

[0076] The content of DAA in F7 extracted from the sideline product of the catalytic distillation tower: 5.6%;

[0077] The water content in F10 from the organic phase of the phase separator: 5.9%;

[0078] The MSO content in F11 of the water phase of the phase separator: 4.7%;

[0079] MIBK product F21 was collected from the side line, and the purity was 99.55% by gas chromatography.

[0080] Other results are shown in Table 1 and Table 2.

Example Embodiment

[0081] Example 3

[0082] The difference from Example 1 is that in Example 3, the DAA decomposition reaction temperature is 160° C. and the pressure is 8.1 bar, and the others are the same as those described in Example 1.

[0083] The content of DAA in F7 extracted from the sideline product of the catalytic distillation tower: 2.2%;

[0084] The water content in F10 from the organic phase of the phase separator: 1.8%;

[0085] MSO content in F11 of the water phase of the phase separator: 1.5%;

[0086] MIBK product F21 was collected from the side line, and the purity was 99.72% by gas chromatography.

[0087] Other results are shown in Table 1 and Table 2.

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Abstract

The invention discloses a method and equipment thereof for synthesizing methyl isobuthl ketone with an acetone two-step method. The method includes the steps that a, DAA and MSO are generated by condensation and dehydration of the raw material of acetone in a catalytic distillation column, products rich in MSO and water are side taken off from the catalytic distillation column; b, a material containing DAA is side taken off from the catalytic distillation column, and put into a DAA decomposition reactor, DAA in the material is transformed into acetone and MSO, the products are separated by flash evaporation to obtain a gas phase rich in acetone and a liquid phase rich in MSO and water, the gas phase and the liquid phase are respectively circulated back to the column; c, the liquid phase products in the step a are cooled and divided into phases, an organic phase rich in MSO and a water phase containing small amounts of organic matter are obtained, the water phase enters into a recoverytower to recycle organic matter; d, MIBK is generated by the hydrogenation of the organic phase in the step c, after hydrogen gas is recycled by flash evaporation, then enters into an MIBK refining tower, and a MIBK product is side taken off. The total conversion rate of acetone is 99.0%, and the product MIBK purify is up to 99.5%.

Description

technical field [0001] The invention belongs to the technical field of methyl isobutyl ketone synthesis, and in particular relates to a method and equipment for synthesizing methyl isobutyl ketone by acetone two-step method. Background technique [0002] Methyl isobutyl ketone (referred to as MIBK) is a colorless, non-toxic, chemically stable, and widely used organic solvent, mainly used in nitrocellulose, polyvinyl chloride, polyvinyl acetate, polystyrene, cyclo Oxygen resin, natural and synthetic rubber, solvent for paint, coating and degreasing, coloring agent for color film, also used as extractant for penicillin fermentation broth and separating agent for some salts, and antiozonant for tire manufacturing , and it is also the main raw material for some organic synthesis. [0003] There are many ways to produce MIBK from acetone (abbreviated as AC), including AC three-step method, AC two-step method and AC one-step method. [0004] The main process of the AC three-step...

Claims

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Application Information

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IPC IPC(8): C07C49/04C07C45/62C07C45/82C07C45/74C07C49/203
CPCC07C45/62C07C45/74C07C45/82C07C49/203C07C49/04Y02P20/10Y02P20/129
Inventor 姚臻蔡旺锋罗杰敏胡佩钟远华王金亮
Owner 长成新能股份有限公司
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