Method for continuously preparing epichlorohydrin by glycerine reaction fractional distillation

An epichlorohydrin, reactive distillation technology, applied in chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, organic chemistry, etc. The effect of mild reaction conditions and high water content
CN101337950AInactive Publication Date: 2009-01-07JIANGSU POLYTECHNIC UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU POLYTECHNIC UNIVERSITY
Publication Date
2009-01-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing epoxy chloropropane which is obtained through successive reaction and distillation coupling technology after glycerine that is the by-product of biological diesel oil reacts with chlorine hydride through substitution reaction under homogeneous multielement catalysis and further performs saponification cyclization reaction. The method comprises the following steps: (1) chlorine hydride is pumped in glycerine that is the by-product of biological diesel oil for reaction under homogeneous multielement catalysis, and the mixture composed of 1, 3-dichloro-2-propanol and 2, 3-dichloro-1-propanol is prepared through the technologies of continuous feeding, continuous catalyzed chlorination and continuous rectification; (2) the isomeride mixture solution of 1, 3-dichloro-2-propanol and 2, 3-dichloro-1-propanol performs the saponification cyclization to generate a product of epoxy chloropropane in alkaline solution. The method has the advantages of mild reaction condition is mild, high catalyst activity, dedicated catalytic performance, high product selectivity, process 'cleaning', easy separation, continuous operation, environment-friendliness, etc.
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Description

technical field

[0001] The invention relates to a production process of epichlorohydrin, in particular to a method for preparing epichlorohydrin from biodiesel by-product glycerin through continuous catalytic chlorination, reactive distillation and saponification. Background technique

[0002] As a "petroleum plant" with great potential for green and clean alternative fuels in the 21st century, biodiesel has shown a strong development trend in the field of fossil fuel substitutes due to its renewability and good environmental friendliness. widespread attention. At present, with the rise of a new round of biodiesel technology using renewable biomass as raw material, the sustainable development of its downstream industries has gradually become a research hotspot, and the research on deep processing technology of biodiesel by-product glycerol is in the ascendant all over the world.

[0003] During the production of biodiesel, a large amount of glycerin is produced by-product, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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