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Method for preparing epoxy propane by using micro reaction device

A micro-reaction device, propylene oxide technology, applied in the direction of oxidation reaction preparation, chemical instruments and methods, chemical/physical/physicochemical reactors, etc., can solve the problems of low production value and difficult separation, and achieve short reaction time, The effect of fast response and high transmission rate

Active Publication Date: 2017-06-13
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional method of producing propylene oxide will produce monomethyl ether as a by-product, which is difficult to separate and has very low production value, and the traditional method of producing propylene oxide will not get propylene glycol

Method used

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  • Method for preparing epoxy propane by using micro reaction device
  • Method for preparing epoxy propane by using micro reaction device
  • Method for preparing epoxy propane by using micro reaction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 200 g of 35% hydrogen peroxide (2.06 mol), add 140.5 g (2.06 mol) of formic acid, add 2.06 g (0.0206 mol) of sulfuric acid, and stir it into a uniform state with a stirrer. Feed nitrogen back pressure to the Corning reactor to 10bar, switch to propylene gas, and pump hydrogen peroxide material into the reactor at the same time. The liquid phase velocity is 15mL / min, the gas flow rate is 1.0L / min, the molar ratio of propylene to hydrogen peroxide is about 1:1, the reaction time is about 50s, and the reaction temperature is 30°C. The yield of propylene oxide and propylene glycol was 35% and the yield of hydrogen peroxide was 90% through indirect iodometric titration as detected by gas chromatography in the reaction solution.

Embodiment 2

[0028] Weigh 200 g of 35% hydrogen peroxide (2.06 mol), add 147.5 g (2.16 mol) of formic acid, add 2.06 g (0.0206 mol) of sulfuric acid, and stir it into a uniform state with a stirrer. Feed nitrogen back pressure to the Corning reactor to 10bar, switch to propylene gas, and pump hydrogen peroxide material into the reactor at the same time. The liquid phase velocity is 15mL / min, the gas flow rate is 1.0 / min, the molar ratio of propylene to hydrogen peroxide is about 1:1, the reaction time is about 50s, and the reaction temperature is 30°C. The yield of propylene oxide and propylene glycol was 36% and the yield of hydrogen peroxide was 91% through indirect iodometric titration as detected by gas chromatography in the reaction liquid.

Embodiment 3

[0030] Weigh 200 g of 35% hydrogen peroxide (2.06 mol), add 140.5 g (2.06 mol) of formic acid, add 1.55 g (0.0155 mol) of sulfuric acid, and stir it into a uniform state with a stirrer. Feed nitrogen back pressure to the Corning reactor to 10bar, switch to propylene gas, and pump hydrogen peroxide material into the reactor at the same time. The liquid phase velocity is 15mL / min, the gas flow rate is 1.0L / min, the molar ratio of propylene to hydrogen peroxide is about 1:1, the reaction time is about 50s, and the reaction temperature is 30°C. The yield of propylene oxide and propylene glycol was 32% as detected by gas chromatography in the reaction solution, and the conversion rate of hydrogen peroxide was 86% by indirect iodometric titration.

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Abstract

The invention discloses a method for preparing epoxy propane by using a micro reaction device. The method comprises the following steps: (1) mixing a hydrogen peroxide solution, a formic acid solution and a sulfuric acid solution so as to obtain a homogeneous solution; (2) introducing nitrogen into the micro reaction device; (3) when pumping the homogeneous solution obtained in the step (1) into the micro reaction device, switching the nitrogen introduced into the micro reaction device into a propylene gas, performing reaction, after the reaction is completed, collecting an effluent, thereby obtaining the epoxy propane. The method is rapid in reaction, high in yield, low in cost, high in security, good in operability, small in reaction size, short in time, relatively small in equipment corrosion, simple in production method process, capable of realizing continuous production, relatively high in operation security and relatively high in selectivity, can be directly amplified and is beneficial to industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for preparing propylene oxide using a micro-reaction device. Background technique [0002] Propylene oxide Propylene oxide, also known as propylene oxide and methyl oxirane, is a very important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. Mainly used in the production of polyether, propylene glycol, etc. It is also the main raw material of the fourth-generation detergent non-ionic surfactant, oil field demulsifier, pesticide emulsifier, etc. Propylene oxide derivatives are widely used in industries such as automobiles, construction, food, tobacco, medicine and cosmetics. Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products. [0003] The traditional industrial production methods of propylene oxide are mainly chlor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/12C07C29/48C07C31/20B01J19/00
CPCB01J19/0093C07C29/48C07D301/12C07D303/04C07C31/205
Inventor 郭凯李昕齐豪陈斌黄思宇
Owner NANJING UNIV OF TECH
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