A kind of method for the continuous preparation of methyl bromide by microchannel reactor

A micro-channel reactor, methyl bromide technology, applied in chemical instruments and methods, halogenated hydrocarbon preparation, organic chemistry, etc., can solve the problems of unrecyclable products, low yield and selectivity, and achieve good selectivity of target products. , The effect of high conversion rate of reactants and simple operation

Active Publication Date: 2017-10-31
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for continuously preparing methyl bromide in a microchannel reactor, so as to solve the problems in the prior art that the yield and selectivity are low and the product cannot be recycled.

Method used

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  • A kind of method for the continuous preparation of methyl bromide by microchannel reactor
  • A kind of method for the continuous preparation of methyl bromide by microchannel reactor
  • A kind of method for the continuous preparation of methyl bromide by microchannel reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Weigh 0.6g of phosphoric acid and dissolve it in 20g of deionized water, stir at room temperature for 10min to mix evenly, add 8g of HZSM-5 molecular sieve with a silicon-aluminum ratio of 60 purchased from Nankai University Catalyst Factory, and impregnate at room temperature for 8h. The impregnated mixture was evaporated to dryness in an oil bath at 90°C, and the obtained solid was first dried in an oven at 120°C overnight, then calcined in a muffle furnace at 550°C for 6 hours, and cooled naturally to obtain the modified catalyst A.

Embodiment 2

[0037] Weigh 0.6g of phosphoric acid and dissolve it in 20g of deionized water, stir at room temperature for 10min to mix evenly, add 8g of HZSM-5 molecular sieve with a silicon-aluminum ratio of 80 purchased from Nankai University Catalyst Factory, and impregnate at room temperature for 8h. The impregnated mixed solution was evaporated to dryness in an oil bath at 90°C, and the obtained solid was first dried in an oven at 120°C overnight, then roasted in a muffle furnace at 550°C for 6 hours, and cooled naturally to obtain the modified catalyst B.

Embodiment 3

[0039] Weigh 0.6g of phosphoric acid and dissolve it in 20g of deionized water, stir at room temperature for 10min to mix evenly, add 8g of HZSM-5 molecular sieve with a silicon-aluminum ratio of 100 purchased from Nankai University Catalyst Factory, and impregnate at room temperature for 8h. The impregnated mixture was evaporated to dryness in an oil bath at 90°C, and the obtained solid was first dried in an oven at 120°C overnight, then calcined in a muffle furnace at 550°C for 6 hours, and cooled naturally to obtain modified catalyst C.

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Abstract

The present invention discloses a method for continuously preparing methyl bromide by a microchannel reactor. The method comprises: under the action of carrier gas N2, carrying out reaction on methane and bromine in the microchannel reactor and recovering excess bromine through metal-oxide. Compared to the prior art, the method disclosed by the present invention has advantages that the reaction temperature is lower, a catalyst is not prone to be coked and deactivated, the conversion rate of reactants is relatively high, the selectivity of a target product is relatively good and the like. At the same time, the method disclosed by the present invention is simple in operation, low in cost, environmental-friendly and continuous in production and has a good prospect in industrial application.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for continuously preparing methyl bromide with a microchannel reactor. Background technique [0002] The chemical utilization of natural gas can be roughly divided into direct method and indirect method. Direct methods such as direct oxidation of methane to methanol, formaldehyde and coupling to ethylene, etc. Although these processes have been studied for a long time, due to the harsh reaction conditions (high temperature and high pressure), the target product is easily deeply oxidized to CO 2 and H 2 O, low yield and selectivity, can not compete with the traditional petrochemical process at present, it is difficult to achieve industrialization in the short term. Therefore, in recent years, the indirect conversion and utilization of natural gas has once again become the focus of research all over the world. Among them, large-scale industrial production h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C19/075C07C17/10
Inventor 郭凯孙小宁万力张锴欧阳平凯
Owner NANJING TECH UNIV
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