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Method for removing gas phase hydrogen chloride from dichloropropanol to produce epichlorohydrin

A technology of epichlorohydrin and dichlorohydrin, applied in the directions of chlorine/hydrogen chloride, organic chemistry, etc., can solve the problems of unpublished methods for separating the oil phase of epichlorohydrin and solid catalyst, and achieves close interaction scale, Improve activity and stability, easy separation effect

Inactive Publication Date: 2014-09-24
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

200710019456 announced a preparation method of porous material impregnated and loaded super base catalyst, and used the method of fully mixed flow slurry bed to mix liquid phase dichloropropanol and super base catalyst to produce epichlorohydrin, but the patent has not been published Method for separation of subsequent epichlorohydrin oil phase and solid catalyst

Method used

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  • Method for removing gas phase hydrogen chloride from dichloropropanol to produce epichlorohydrin
  • Method for removing gas phase hydrogen chloride from dichloropropanol to produce epichlorohydrin
  • Method for removing gas phase hydrogen chloride from dichloropropanol to produce epichlorohydrin

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Effect test

Embodiment 1

[0024] 10kg of calcium nitrate and 5kg of zirconium nitrate were mechanically stirred and mixed, sent to a high-energy ball mill for ball milling for 3 hours, and then sent to a catalyst roaster for 5 hours at 600°C to obtain an atom-mixed dichloropropanol cyclization catalyst. The high-energy ball mill made the catalyst Mixing at the atomic scale strengthens the interaction between metal cations, completely different from traditional impregnated supported catalysts, and improves the lifetime of cyclization catalysts.

[0025] The reaction uses a basic catalyst mixed with the above atoms, a gas-solid phase tube reactor, and the tube reactor is filled with the basic catalyst mixed with the above atoms, the reaction temperature is 160 ° C, the reaction pressure is 50KPaG, dichloropropanol catalytic In addition to hydrogen chloride to generate epichlorohydrin, after partial condensation, the crude epichlorohydrin is condensed as a product, and the gas phase hydrogen chloride is wa...

Embodiment 2

[0028] 22kg of calcium nitrate and 1kg of sodium nitrate were mechanically stirred and mixed, sent to a high-energy ball mill for ball milling for 20 hours, and then sent to a catalyst roaster for 5 hours at 500°C to obtain an atom-mixed dichloropropanol cyclization catalyst. The high-energy ball mill made the catalyst Mixing at the atomic scale strengthens the interaction between metal cations, completely different from traditional impregnated supported catalysts, and improves the lifetime of cyclization catalysts.

[0029] The reaction adopts the basic catalyst mixed with the above atoms, and the gas-solid phase column reactor is filled with the basic catalyst mixed with the above atoms in the fixed bed reactor. The reaction temperature is 60 ° C, the reaction pressure is 1KPaA, and the catalytic desorption In addition to hydrogen chloride to generate epichlorohydrin, after partial condensation, the crude epichlorohydrin is condensed as a product, and the gas phase hydrogen c...

Embodiment 3

[0032] 4kg of calcium nitrate and 2kg of zirconium nitrate were mechanically stirred and mixed, sent to a high-energy ball mill for ball milling for 3 hours, and then sent to a catalyst roaster for 5 hours at 600°C to obtain an atom-mixed dichloropropanol cyclization catalyst. The high-energy ball mill made the catalyst Mixing at the atomic scale strengthens the interaction between metal cations, completely different from traditional impregnated supported catalysts, and improves the lifetime of cyclization catalysts.

[0033]The reaction uses a basic catalyst mixed with the above atoms, a gas-solid phase reactor, and the fluidized bed reactor is filled with the basic catalyst mixed with the above atoms. The reaction temperature is 190 ° C, the reaction pressure is 50KPaG, dichloropropanol Remove hydrogen chloride to generate epichlorohydrin, after partial condensation, the crude epichlorohydrin is condensed as a product, the gas phase hydrogen chloride is washed and purified, a...

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Abstract

The invention relates to a method for removing gas phase hydrogen chloride from dichloropropanol to produce epichlorohydrin. The method comprises the steps of: 1. filling a tubular reactor or a fixed bed reactor or a fluidized bed reactor with an atom mixed alkaline catalyst; 2. sending dichloropropanol produced by glycerol chlorination in last process into the tubular reactor or the fixed bed reactor or the fluidized bed reactor to undergo reaction; 3. directly removing the gas phase hydrogen chloride generated in step 2 reaction to obtain crude epichlorohydrin; 4. performing purification treatment on the gas phase hydrogen chloride removed in step 3, then conducting compression to a pressure of more than 0.2MPaG and subjecting the compressed hydrogen chloride to cyclic utilization in the procedure of production of dichloropropanol by the last process of glycerol chlorination.

Description

technical field [0001] The invention belongs to the technical field of chemical production technology, and in particular relates to a method for producing epichlorohydrin by directly removing gas-phase hydrogen chloride from dichloropropanol. Background technique [0002] Epichlorohydrin (alias epichlorohydrin), the chemical name is 1-chloro-2,3-epoxypropane, and the molecular formula is C 3 h 5 OCl, boiling point 115.2, ℃ freezing point -57.2, ℃ is a volatile, unstable colorless liquid, slightly soluble in water, miscible with a variety of organic solvents. [0003] Epichlorohydrin is an important organic chemical raw material and fine chemical product. It is a large variety of propylene derivatives. It is mainly used in the synthesis of glycerin, epoxy resin, epichlorohydrin rubber, nitroglycerin explosives, etc. It can also be used It is used as a solvent for cellulose esters, resins and cellulose ethers; it is also the main raw material for the production of surfactant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/08C07D301/26C01B7/01B01J23/02
CPCC07D303/08C07D301/26
Inventor 赵敏伟杨克俭李荣梁军湘赵斌赵丽丽屈阁杨磊兰杰闫伟杨青王进许景洋
Owner CHINA TIANCHEN ENG
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