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Production technology for 3-chloropropionyl chloride

A technology of chloropropionyl chloride and production process, which is applied in the field of production technology of 3-chloropropionyl chloride, can solve the problems of difficult recovery, large reaction kettle, inconvenient production, etc., and achieves the effect of good environmental protection benefit and cost saving.

Inactive Publication Date: 2019-06-14
常州市武进永升化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the production process of 3-chloropropionyl chloride was based on the reaction of sulfuric acid and hydrochloric acid. The reaction kettle required for industrial production was relatively large, which was inconvenient for production and high in construction costs. At the same time, there was a lot of waste water and waste sulfuric acid, which were difficult to recycle and cause industrial pollution. serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A production process of 3-chloropropionyl chloride includes the following steps:

[0033] Step 1: According to the parts by weight, 10 parts of hydrochloric acid and 6 parts of phosphorus trichloride are reacted to produce HCL and phosphorous acid at a temperature of 50° C. The phosphorous acid is recovered after standing;

[0034] Step 2: Add acrylic acid for addition reaction, and the reaction temperature is 45°C to form 3-trichloropropionic acid;

[0035] Step 3: Add 9 parts of phosphorus trichloride to carry out acylation reaction, stir to obtain a crude product;

[0036] Step 4: The crude product is allowed to stand for stratification, and the phosphorous acid after stratification is recovered;

[0037] Step 5: Distill the remaining expected material in Step 1 to obtain 3-chloropropionyl chloride;

[0038] Step 6: Cool the packaging.

[0039] According to another embodiment of the present invention, it further includes that in step 1, the concentration of hydrochloric acid is ...

Embodiment 2

[0046] A production process of 3-chloropropionyl chloride includes the following steps:

[0047] Step 1: According to parts by weight, 10 parts of hydrochloric acid and 6 parts of phosphorus trichloride are reacted to form a reaction temperature of 55°C to produce HCL and phosphorous acid, which are recovered after standing;

[0048] Step 2: Add acrylic acid for addition reaction, and the reaction temperature is 50°C to form 3-trichloropropionic acid;

[0049] Step 3: Add 9 parts of phosphorus trichloride to carry out acylation reaction, stir to obtain a crude product;

[0050] Step 4: The crude product is allowed to stand for layering, and the phosphorous acid after layering is recovered;

[0051] Step 5: Distill the remaining expected material in Step 1 to obtain 3-chloropropionyl chloride;

[0052] Step 6: Cool the packaging.

[0053] According to another embodiment of the present invention, it further includes that in step 1, the hydrochloric acid has a concentration of 30%, and the f...

Embodiment 3

[0060] A production process of 3-chloropropionyl chloride includes the following steps:

[0061] Step 1: According to the weight parts, 10 parts of hydrochloric acid and 6 parts of phosphorus trichloride are reacted to form a reaction temperature of 60°C to produce HCL and phosphorous acid, which are recovered after standing;

[0062] Step 2: Add acrylic acid for addition reaction, and the reaction temperature is 55°C to form 3-trichloropropionic acid;

[0063] Step 3: Add 9 parts of phosphorus trichloride to carry out acylation reaction, stir to obtain a crude product;

[0064] Step 4: The crude product is allowed to stand for layering, and the phosphorous acid after layering is recovered;

[0065] Step 5: Distill the remaining expected material in Step 1 to obtain 3-chloropropionyl chloride;

[0066] Step 6: Cool the packaging.

[0067] According to another embodiment of the present invention, it further includes that in step 1, the concentration of hydrochloric acid is 35%, and the for...

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PUM

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Abstract

The invention relates to the technical field of chemical industry production and especially relates to a production technology for 3-chloropropionyl chloride. The production technology for 3-chloropropionyl chloride comprises the following steps: 1) generating HCL and phosphorous acid from formation reaction of 10 parts of hydrochloric acid and 6 parts of phosphorus trichloride in parts by weight,standing by and then recycling phosphorous acid; 2) adding acrylic acid for formation reaction, thereby forming 3-chloropon; 3) adding 9 parts of phosphorus trichloride for acylation reaction, and stirring, thereby acquiring a crude product; 4) standing by and layering the crude product, and recycling the layered phosphorous acid; 5) distilling the residual material, thereby acquiring 3-chloropropionyl chloride; 6) cooling and packaging. No wastewater is generated from reaction of the technology; the reaction is not in contact with water and wastewater treatment cost can be greatly saved, sothat the reaction has the benefit of environmental protection; 3-chloropropionyl chloride cost was 50,000 yuan per ton in the past but is 35,000 yuan per ton now.

Description

Technical field [0001] The invention relates to the technical field of chemical production, in particular to a production process of 3-chloropropionyl chloride. Background technique [0002] The previous process for producing 3-chloropropionyl chloride used sulfuric acid and hydrochloric acid to react. Industrial production requires larger reactors, inconvenient production and high construction costs. At the same time, it produces a lot of waste water and waste sulfuric acid, which is difficult to recycle and cause industrial pollution. serious. Summary of the invention [0003] In order to overcome the shortcomings of the existing 3-chloropropionyl chloride production, the present invention provides a 3-chloropropionyl chloride production process. [0004] The technical scheme adopted by the present invention to solve its technical problems is: a production process of 3-chloropropionyl chloride, which includes the following steps: [0005] Step 1: According to the weight parts, 10 ...

Claims

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Application Information

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IPC IPC(8): C07C51/60C07C53/50C01B25/163
Inventor 周忠良
Owner 常州市武进永升化工有限公司