Preparation method of epoxy compound

A technology of epoxy compounds and compounds, applied in the direction of organic chemistry, etc., can solve the problems of oxidant and product decomposition, reduced selectivity of epoxidized products, large reaction heat, etc., achieve high conversion rate, improve process safety, and improve selectivity sexual effect

Active Publication Date: 2021-01-22
北京水木滨华科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, such a feeding method requires extremely strict requirements, including the control of the amount added at each feeding point and the total amount added. If the control is not good, it will easily cause excessive heat of reaction, leading to problems

Method used

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  • Preparation method of epoxy compound
  • Preparation method of epoxy compound
  • Preparation method of epoxy compound

Examples

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Example Embodiment

[0055]The preparation method of the present invention will be further described in detail below in conjunction with specific examples. It should be understood that the following embodiments are only illustrative and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies implemented based on the foregoing contents of the present invention are covered by the scope of the present invention.

[0056]The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents, materials, etc. used in the following examples, unless otherwise specified, can be obtained from commercial sources.

[0057]The schematic diagram of the epoxidation reaction device used in the following examples and comparative examples is as followsfigure 2 As shown, each reactor represents a level 1 reaction. According to the flow direction of the reaction materials, all the materials are add...

Example Embodiment

[0058]Example 1

[0059]Using tert-butanol as a solvent, the concentration of the oxidant tert-butyl hydroperoxide is 20wt%, the molar ratio of propylene to tert-butyl hydroperoxide is 3:1, and the polyol molybdenum catalyst concentration is 300 ppm.

[0060]Put the above materials infigure 2 The shown epoxidation reaction device is uniformly mixed, and the propylene epoxidation reaction is carried out at 120-125°C within the reaction residence time of 0-10 minutes, and the reaction residence time is at 125-130°C and higher than the reaction residence time of 10-20 minutes. The propylene epoxidation reaction is carried out at the temperature of the previous stage, and the propylene epoxidation reaction is carried out at 130-135°C and higher than the temperature of the previous stage reaction within the reaction residence time of 20-30 minutes.

[0061]After the 30-minute reaction in the first stage, the product propylene oxide is separated by rectification, and then part of the by-product te...

Example Embodiment

[0085]Example 2

[0086]Using tert-butanol as a solvent, the concentration of the oxidant tert-butyl hydroperoxide is 20wt%, the molar ratio of 1-butene to tert-butyl hydroperoxide is 3:1, and the concentration of the polyol molybdenum catalyst is 300 ppm.

[0087]The above materials are mixed uniformly in the epoxidation reaction device, and the 1-butene epoxidation reaction is carried out at 120-125℃ within the reaction residence time of 0-10 minutes, and the reaction rate of 125-130 within the reaction residence time of 10-20 minutes The 1-butene epoxidation reaction is carried out at a temperature higher than the temperature of the previous stage, and the 1-butene epoxidation reaction is carried out at a temperature of 130-135°C and higher than the temperature of the previous stage within the reaction residence time of 20-30 minutes.

[0088]After the 30-minute reaction in the first stage, the product 1,2-butylene oxide is separated by rectification, and then part of the by-product tert-...

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Abstract

The invention provides a preparation method of an epoxy compound, and develops a step-by-step heating preparation process. When the concentration of an oxidizing agent is high, a low-temperature reaction is selected, so that the decomposition reaction of the oxidizing agent is reduced on the premise of ensuring the reaction rate; and when the concentration of the oxidizing agent is reduced, the reaction rate is increased by increasing the reaction temperature, and the side reaction of epoxy compound decomposition is reduced. The process does not need to add the oxidizing agent in batches, so that the complexity of process operation is simplified. Compared with the preparation method reported in the existing literature, the step-by-step heating method ensures the high conversion rate of theoxidizing agent, enhances the selectivity of the epoxidation reaction, simplifies the production operation and enhances the process safety.

Description

technical field [0001] The invention belongs to the technical field of epoxy compounds, and in particular relates to a preparation method of epoxy compounds. Background technique [0002] Epoxy compounds are an important class of organic chemical intermediates, such as Propylene Oxide (PO), which can chemically react with a variety of substances due to its highly tense oxygen-containing three-membered ring structure, and its derivative products Nearly a hundred kinds. The main use of propylene oxide is to prepare polyether polyol, propylene glycol and various nonionic surfactants, among which polyether polyol is an important raw material for the production of polyurethane foam, insulation materials, elastomers, adhesives and coatings. As an important basic chemical raw material, the market demand for propylene oxide shows a continuous growth trend due to the increasing consumption of downstream products. [0003] The production methods of propylene oxide mainly include chl...

Claims

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Application Information

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IPC IPC(8): C07D301/19C07D303/04
CPCC07D301/19C07D303/04
Inventor 门永彪马敏解淑民纪珲赵伟男杨灿郑虓
Owner 北京水木滨华科技有限公司
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