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Butyl acrylate production system free of alkali neutralization and butyl acrylate production method

A technology of butyl acrylate and production system, applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve problems such as large salt-containing wastewater

Inactive Publication Date: 2017-01-04
谦信化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problem that neutralization operation exists in the production process of butyl acrylate in the prior art, and then produces a large amount of saline waste water, the present invention provides a production system and production method of butyl acrylate without alkali neutralization

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  • Butyl acrylate production system free of alkali neutralization and butyl acrylate production method

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Embodiment 1

[0058] like figure 2 As shown, the present embodiment provides a butyl acrylate production system without alkali neutralization, and the system includes a first reactor 1, a second reactor 2, an extraction tower 3, an azeotropic rectification tower 4, a light removal Tower 5 and dehydration tower 6, wherein the first reaction kettle 1, the second reaction kettle 2 and the extraction tower 3 are connected successively, the tower top material outlet of the extraction tower 3 links to each other with the material inlet of the azeotropic rectification tower 4, and the azeotropic rectification tower The tower top material outlet of 4 links to each other with the material inlet of light removal tower 5, and the tower bottom material outlet of azeotropic rectification tower 4 and the tower bottom material outlet of extraction tower 3 all link to each other with the material inlet of first reactor 1, light removal The top material outlet of tower 5 is connected with the material inle...

Embodiment 2

[0061] The present embodiment provides a kind of production method that butyl acrylate is produced, and described method comprises the following steps:

[0062] (1) The raw material acrylic acid is injected into the first reaction kettle 1, and n-butanol and acid catalyst are fed into the first reaction kettle 1 through the dehydration tower 6 in parallel to carry out the first esterification reaction at 95°C at 48kPa, wherein the acrylic acid The ratio of n-butanol and n-butanol is 1:1, and the acid catalyst content is 1.5wt% of the total material; when the first reactor 1 is full of materials, the material overflows to the second reactor 1 at 96°C for the second time at 48kPa. In the esterification reaction, the water produced by the first reaction kettle 1 in the reaction process enters the dehydration tower 6 and is removed from the top of the dehydration tower 6 to ensure that the esterification reaction is carried out in the direction of the positive reaction; the second ...

Embodiment 3

[0067] (1) The raw material acrylic acid is injected into the first reaction kettle 1, and n-butanol and acid catalyst are fed into the first reaction kettle 1 through the dehydration tower 6 in parallel to carry out the first esterification reaction at 95°C at 48kPa, wherein the acrylic acid The ratio of n-butanol and n-butanol is 1:1, and the acid catalyst content is 1.5wt% of the total material; when the first reactor 1 is full of materials, the material overflows to the second reactor 1 at 96°C for the second time at 48kPa. In the esterification reaction, the water produced by the first reaction kettle 1 in the reaction process enters the dehydration tower 6 and is removed from the top of the dehydration tower 6 to ensure that the esterification reaction is carried out in the direction of the positive reaction; the second esterification reaction, the reaction obtained The product enters the extraction tower 3 for backflush extraction to obtain an aqueous phase and an organi...

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Abstract

The invention provides a butyl acrylate production system free of alkali neutralization and a butyl acrylate production method. The butyl acrylate production system free of alkali neutralization comprises a first reaction kettle, a second reaction kettle, an extraction tower, an azeotropic rectifying tower, a lightness-removing tower and a dehydrating tower, wherein the first reaction kettle, the second reaction kettle and the extraction tower are connected sequentially, a top material outlet of the extraction tower is connected with a material inlet of the azeotropic rectifying tower, a top material outlet of the azeotropic rectifying tower is connected with a material inlet of the lightness-removing tower, a bottom material outlet of the azeotropic rectifying tower is connected with a bottom material outlet of the extraction tower and a material inlet of the first reaction kettle, a top material outlet of the lightness-removing tower is connected with a material inlet of the dehydrating tower, a bottom material outlet of the lightness-removing tower is connected with a heaviness-removing tower outside the system, and a bottom material outlet of the dehydrating tower is connected with the material inlet of the first reaction kettle. The butyl acrylate production system free of alkali neutralization and the butyl acrylate production method have the advantages that a neutralizing tower in a traditional acrylic acid production technology is modified into the azeotropic rectifying tower, neutralizing is not required, salt-containing wastewater cannot be produced, and accordingly environmental friendliness is achieved.

Description

technical field [0001] The invention belongs to the field of organic chemical raw material production, and relates to a butyl acrylate production system and a production method thereof, in particular to a butyl acrylate production system without alkali neutralization and a production method thereof. Background technique [0002] Acrylates are an important class of chemical raw materials. Butyl acrylate (BA), as a synthetic monomer and modification additive, is widely used in the fields of coatings, adhesives, textiles, papermaking, leather, plastics and rubber. The production method of BA is obtained by esterification of acrylic acid (AA) and n-butanol (BuOH) under a strong acid catalyst. [0003] The current mainstream butyl acrylate preparation process in the market is as follows: figure 1 Shown: the raw materials (acrylic acid and acid catalyst) are added to the first reaction kettle 1, butanol is added from the dehydration tower 6, and the three are in the first reacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/54C07C69/54
CPCC07C67/08C07C67/54C07C69/54
Inventor 彭楚榜于冬娥董杨吴海昌
Owner 谦信化工集团有限公司