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Method for producing epoxy chloropropane

A technology of epichlorohydrin and chloropropene, which is applied in the direction of organic chemistry, can solve the problems of high energy consumption and complicated process, and achieve the effect of simple process, good technical effect and energy saving

Active Publication Date: 2013-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the current reaction distillation process for producing epichlorohydrin by epoxidation of propylene chloride requires two towers, a reaction distillation tower and a product separation tower, and there are problems of complicated process and high energy consumption. A new method is provided. The method for the production of epichlorohydrin, the method has the characteristics of simple process and low energy consumption

Method used

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  • Method for producing epoxy chloropropane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] according to figure 1 In the epichlorohydrin production process shown, the number of theoretical plates in the public rectification section is 5, the number of theoretical plates in the common stripping section is 10, the separation efficiency of the reaction section is equivalent to 25 theoretical plates, and the number of theoretical plates in the rectification section on the production side is for 25. The catalyst loaded in the reaction section is SiO 2 / TiO 2 The titanium-silicon molecular sieve with a molar ratio of 80, 30% by weight of hydrogen peroxide and methanol mixture (70% by weight of methanol content) enters the first theoretical plate of the reaction section with a flow rate of 1.00 g / min (numbered from top to bottom, the same below), Allyl chloride enters from the bottom of the reaction section with a flow rate of 2.00 g / min, and the top of the tower is fully refluxed. The side line is extracted from the 10th theoretical plate of the separation section...

Embodiment 2

[0017] according to figure 1 In the epichlorohydrin production process shown, the number of theoretical plates in the public stripping section is 30, the separation efficiency in the reaction section is equivalent to 45 theoretical plates, and the number of theoretical plates in the rectification section on the production side is 45. The catalyst loaded in the reaction section is SiO 2 / TiO 2 Titanium silicon molecular sieve with a molar ratio of 180, 50% by weight of hydrogen peroxide and acetone mixture (70% by weight of acetone content) enters from the bottom of the catalytic reaction section with 1.00 g / min flow and 12.00 g / min flow of allyl chloride, and the side line enters from the partition The 40th theoretical plate in the section takes out 12.36 g / min, and the rest is taken out from the bottom of the tower. The weight ratio of the first part to the second part is preferably 1:1, and the temperature in the catalytic reaction section is 32 to 38°C. After the operation...

Embodiment 3

[0019] according to figure 1 In the epichlorohydrin production process shown, the number of theoretical plates in the public rectification section is 3, the number of theoretical plates in the public stripping section is 5, the separation efficiency of the reaction section is equivalent to the number of theoretical plates being 5, and the number of theoretical plates in the rectification section on the production side is 5. for 5. The catalyst loaded in the reaction section is SiO 2 / TiO 2Titanium-silicon molecular sieve with a mol ratio of 20, 2% by weight of hydrogen peroxide and ethyl acetate mixture (50% by weight of ethyl acetate content) enters the first theoretical plate of the reaction section with a flow rate of 1.00 g / min, and propene chloride is fed at a rate of 5.00 g / min. The minute flow enters from the bottom of the catalytic reaction section, the top of the tower is fully refluxed, the side line is extracted from the third theoretical plate of the partition se...

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Abstract

The invention relates to a method for producing epoxy chloropropane, which mainly solves the problems of complex process and high energy consumption since the existing reaction distillation technique for preparing epoxy chloropropane by epoxidating chloropropene needs to be implemented by a reaction distillation tower and a product separation tower. The method is implemented in a way that: chloropropene, hydrogen peroxide and solvent are subjected to epoxidation reaction in the tower body of a reaction distillation separation tower, and in the reaction process, the components are separated; the components on the tower top are condensed and totally refluxed; the solvent / chloropropene mixture is produced from the side stream of the separation tower; the epoxy chloropropane is produced from the tower bottom; and the hydrogen peroxide / solvent mixture enters from the top of the reaction section, and the chloropropene can enter from any position of the reaction section. The reaction distillation separation tower comprises a reaction distillation separation tower body, a tower top condenser and a tower bottom reboiler, wherein the reaction distillation separation tower body comprises a raw material feed port, a tower top feed port, a tower top discharge port, a tower bottom feed port, a tower bottom discharge port, a side stream production port, a partition board, a public rectifyingsection, a reaction section, a production side rectifying section and a public stripping section. The technical scheme well solves the problems, and can be used for industrial production of epoxy chloropropane.

Description

technical field [0001] The invention relates to a method for producing epichlorohydrin. Background technique [0002] Because epichlorohydrin contains active epoxy groups and chlorine atoms in its molecules, its chemical properties are quite active, and it has become an important basic organic chemical raw material and intermediate, and is widely used in the synthesis of epoxy resin, glycerin, and chlorohydrin rubber. , pharmaceuticals, pesticides, surfactants, FRP, ion exchange resins, coatings and plasticizers, etc. At present, epichlorohydrin is produced from propylene, and the production methods mainly include the chloropropene method and the allyl alcohol method. The chloropropene method, also known as the high-temperature chlorination method, is the main method for producing epichlorohydrin, with mature technology and flexible production process. But the allyl chloride method also has some serious defects, such as many by-products, high energy consumption, serious eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/08C07D301/12C07D301/32
Inventor 钟禄平肖剑
Owner CHINA PETROLEUM & CHEM CORP