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Chlorination process in chloropropene production

A technology of allyl chloride and propylene, applied in the field of allyl chloride production, which can solve the problems of low production continuity and many side reactions, and achieve the effect of improving production continuity and reducing side reactions

Inactive Publication Date: 2014-04-16
SHANDONG HIYI CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in the prior art, the yield of allyl chloride obtained by the chlorination reaction is 75%-80%, with many side reactions and low production continuity

Method used

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  • Chlorination process in chloropropene production
  • Chlorination process in chloropropene production

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Embodiment １

[0024] The chlorination process in the production of chloropropene of the present invention, concrete steps are:

[0025] (1) After the liquid chlorine is vaporized by the chlorine evaporator, it enters the chlorine buffer tank and is sent to the mixing section of the chlorination reactor; the chlorine evaporator is heated by 0.4MPa low-pressure steam.

[0026] (2) The water content of raw material propylene is less than 10ppm, and it is divided into two paths together with the recovered propylene in the dry propylene tank. After mutual heat exchange in the propylene subcooler, one path is decondensed and evaporated to the top of the tower for spray cooling, and the other path passes through the chloride The cooler cools the reaction material entering the condensing and steaming tower, and vaporizes itself and then enters the vaporizer, and then enters the propylene buffer tank after being completely vaporized;

[0027] (3) In the heat exchanger, the reaction material from the...

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Abstract

The invention discloses a chlorination process in chloropropene production. The process comprises the following steps: gasifying liquid chlorine through a chlorine evaporator, allowing the chlorine to enter a chlorine buffer tank, metering, and feeding the chlorine into a mixing section of a chlorination reactor; pretreating a raw material propylene, and feeding the propylene into the chlorination reactor to react with the chlorine, wherein the reaction product comprises mixed gas of chloropropene, 1,2-propylene dichloride+1,3-dichloropropene, excessive propylene and hydrogen chloride. The chlorination process is improved, the yield is 85% after improvement, side reactions are reduced, and the production continuity is improved.

Description

technical field [0001] The invention relates to the technical field of allyl chloride production, in particular to a chlorination process in the production of allyl chloride. Background technique [0002] Allyl chloride is a colorless flammable liquid with a corrosive and pungent smell. Slightly soluble in water, miscible with ethanol, chloroform, ether and petroleum ether. It can be used as an intermediate in the production of epichlorohydrin, propylene alcohol, glycerin, etc., as a solvent for special reactions, and as a raw material for pesticides, medicines, spices, and paints. Used in organic synthesis and pharmaceutical industry, 3-chloropropene, also known as allyl chloride, is a raw material for organic synthesis. It is used in the synthesis of insecticidal monosultap, dimehypo and cartap intermediates N, N- Dimethacrylamine and pyrethroid intermediate acryl alcohol ketone are also important raw materials for medicine, synthetic resins, paints, spices, etc. It has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C21/067C07C17/10
Inventor 王吉峰薄纯金李胜军宋朋斌
Owner SHANDONG HIYI CHEM TECH
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