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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 the catalytic rectification tower is greatly reduced, but pressurized operation is still required, which will lead to an increase in investment costs and increased by-product formation

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
Effect test

Embodiment 1

[0056] use as figure 1 The technological process of the synthetic methyl isobutyl ketone of shown acetone two-step method.

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

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

[0059] The acetone raw material F1 enters the catalytic rectification tower from the top of the tower, and the DAA-containing material F2 is extracted from the side line between the third and fourth stages of the catalytic rectification tower. The liquid phase output F6 of the acetone flasher is circulated back to the tower between the fourth and fifth sections of the catalytic rectification tower, and the stream F7 rich in MSO and water is sent to the fifth and ...

Embodiment 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, and the others are the same as those described in Example 1.

[0076] The content of DAA in F7 produced from the side stream product of the catalytic rectification tower: 5.6%;

[0077] Water content in the organic phase discharge F10 of the phase separator: 5.9%;

[0078] MSO content in the aqueous phase discharge F11 of the phase separator: 4.7%;

[0079] The MIBK product F21 is extracted through the side stream, and its purity is 99.55% through gas chromatography analysis.

[0080] See Table 1 and Table 2 for other results.

Embodiment 3

[0082] The difference from Example 1 is that the DAA decomposition reaction temperature in Example 3 is 160° C., 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 produced from the side stream product of the catalytic rectification tower: 2.2%;

[0084] Water content in the organic phase discharge F10 of the phase separator: 1.8%;

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

[0086] The MIBK product F21 is extracted through the side stream, and its purity is 99.72% through gas chromatography analysis.

[0087] See Table 1 and Table 2 for other results.

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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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