A kind of method and its equipment of synthesizing methyl isobutyl ketone by 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: 2021-01-26
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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  • A kind of method and its equipment of synthesizing methyl isobutyl ketone by acetone two-step method
  • A kind of method and its equipment of synthesizing methyl isobutyl ketone by acetone two-step method
  • A kind of method and its equipment of synthesizing methyl isobutyl ketone by acetone two-step method

Examples

Experimental program
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Effect test

Embodiment 1

[0056] using as figure 1 Shown is the technological process of synthesizing methyl isobutyl ketone by acetone two-step method.

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

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

[0059] The acetone raw material F1 enters the catalytic rectification tower from the top of the tower, the DAA-containing material F2 is extracted from the side line between the third and fourth stage packings of the catalytic rectification tower, and the acetone-rich gas phase F5 is placed in the first and second stage catalyst beds of the catalytic rectification tower. It is circulated back to the tower during the interval, the liquid phase discharge F6 of the acetone flasher is circ...

Embodiment 2

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

[0076] DAA content in F7 produced by catalytic distillation column side line product: 5.6%;

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

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

[0079] MIBK product F21 is extracted by the side line, and the purity is 99.55% by gas chromatography analysis.

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

Embodiment 3

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

[0083] DAA content in F7 produced by catalytic distillation column side line product: 2.2%;

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

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

[0086] MIBK product F21 is extracted by sideline, and its purity is 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 for synthesizing methyl isobutyl ketone by a two-step method from acetone. The method comprises: a. the raw material acetone is condensed and dehydrated in a catalytic rectification tower to generate DAA and MSO, and is fed to the side line of the catalytic rectification tower Extract products rich in MSO and water; b. The DAA-containing material is extracted from the side line of the catalytic rectification tower and enters the DAA decomposition reactor. The DAA in the material is converted into acetone and MSO, and the product is flash separated to obtain acetone-rich gas phase and The liquid phase containing MSO and water is recycled back to the tower respectively; c, the liquid phase product described in step a is cooled and phase-separated to obtain an organic phase rich in MSO and an aqueous phase containing a small amount of organic matter, and the aqueous phase enters the recovery tower to recover organic matter; d 1. The organic phase described in step c is hydrogenated to generate MIBK, and the hydrogen gas is recovered by flash evaporation and then enters the MIBK refining tower, and the MIBK product is extracted from the side line. The whole process conversion rate of acetone in the invention reaches 99.0%, and the purity of the product MIBK can reach 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 an acetone two-step method. Background technique [0002] Methyl isobutyl ketone (MIBK for short) is a colorless, non-toxic, chemically stable, and widely used organic solvent, mainly used for nitrocellulose, polyvinyl chloride, polyvinyl acetate, polystyrene, cyclic Oxygen resins, natural and synthetic rubbers, solvents for paints, coatings and deoiling, color formers for color films, also used as extractants for penicillin fermentation broths and as separating agents for some salts, and as antiozonants for tire manufacturing , and it is also the main raw material for some organic synthesis. [0003] There are various methods for producing MIBK from acetone (AC for short), including AC three-step method, AC two-step method and AC one-step method. [0004] The main process of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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