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Method for extracting butyl acrylate through liquid-liquid extraction of two side feed solvents

A technology of butyl acrylate and extraction, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., to achieve the effects of avoiding polymerization and low energy consumption

Inactive Publication Date: 2012-02-08
江苏沿江化工资源开发研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for extracting butyl acrylate through liquid-liquid extraction of two side feed solvents
  • Method for extracting butyl acrylate through liquid-liquid extraction of two side feed solvents
  • Method for extracting butyl acrylate through liquid-liquid extraction of two side feed solvents

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Embodiment 1

[0039] refer to figure 2 , image 3 The process and device shown, using two kinds of solvent side feed liquid-liquid extraction process to extract butyl acrylate, the raw materials used come from the esterification reaction product of acrylic acid and n-butanol, and its mass percentage composition is butyl acrylate (90.29%), butanol ( 4.89%), butyl ether (0.95%), butoxybutyl acrylate (2.42%) and water (1.45%).

[0040] Under the condition of 298.2K, press figure 2 The process flow of two solvent-feed liquid-liquid extractions is shown. The mixed liquid 4 containing butyl acrylate is sent to the extraction tower 3 with a flow rate of 30Kg / h; the extraction agent is glycerin and water, glycerol:water=1:0.5, the extraction Glycerin 6 and water 7 enter the extraction tower 3 from the tower top and the side line in the tower respectively, and the flow rate is 30Kg / h. The raw material butyl acrylate 4 and the inflowing extractant are continuously contacted in countercurrent und...

Embodiment 2

[0048] Embodiment 2 is substantially the same as Embodiment 1, and the polyhydric alcohol that adopts is propylene glycol.

[0049]

Embodiment 3

[0050] Embodiment 3 is basically the same as Embodiment 1, and the polyol used is 1,4-butanediol.

[0051]

[0052] Two kinds of solvent side feed liquid-liquid extraction processes of the present invention are suitable for separating and extracting the mixed solution of butyl acrylate, butanol, butyl ether, butoxybutyl acrylate and water, and the proportion of each component in the mixed solution containing butyl acrylate is different. limit. According to the composition of the raw material butyl acrylate mixed liquid, the feed ratio of the extractant to the mixed liquid is 0.5-2.5:1. The raw material is sent into the extraction tower, and is reversely contacted with the extractant flowing into the extraction tower, and the raffinate contains more than 99.9% of butyl acrylate after standing and stratifying. After the extraction phase is rectified by the side rectification tower and the solvent recovery tower, the extractant water and polyols are recycled; the separated buta...

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Abstract

The invention discloses a method for extracting butyl acrylate through liquid-liquid extraction of two side feed solvents. The method comprises the steps of: subjecting a butyl acrylate material containing butanol, butyl ether, butyl butoxyacrylate and water to continuous countercurrent extraction in an extraction tower with a polyol and water as extractants, introducing the two streams of polyol and water into the extraction tower respectively, with the extractants and the butyl acrylate material in a mass ratio of 0.5-2.5:1, the polyol and water in a mass ratio of 1:0.25-0.75, thus obtaining the raffinate, i.e. the butyl acrylate with purity over 99.9%; conducting distillation separation to the extraction phase so as to obtain the polyol and water which are recyclable respectively. The method of the invention can effectively separate a mixed solution of butyl acrylate, butanol, butyl ether, butyl butoxyacrylate and water, and the separated butyl acrylate can has purity up to over 99.9%, with a one-time yield of more than 98.5%.

Description

technical field [0001] The invention relates to a process for separating and purifying butyl acrylate in the production process of butyl acrylate, in particular to a method for extracting butyl acrylate through liquid-liquid extraction of two solvent side line feeds. Background technique [0002] Butyl Acrylate, Butyl Acrylate (abbreviated as BA), is a colorless liquid, almost insoluble in water, with a solubility of 0.14g / 100ml in water at 20°C, soluble in organic solvents such as ethanol, and is the most important type of general-purpose acrylate. In China, as of July 2004, the statistical production capacity has reached 140,000 tons per year, becoming the most produced acrylic ester product. Acrylic acid is widely used in industry, mainly used in the manufacture of synthetic resins, synthetic fibers, synthetic rubber, plastics, coatings, adhesives, etc. During use, acrylates are often polymerized into polymers or copolymers. Butyl acrylate (as well as methyl, ethyl, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/58
Inventor 顾正桂
Owner 江苏沿江化工资源开发研究院有限公司