System and method for continuously preparing alcohol ethers by microwave catalysis

A microwave catalysis and alcohol ether technology, which is applied in the preparation of ether from alkylene oxide, ether preparation, organic chemistry, etc., can solve the problems of few catalyst active sites, low alcohol ether selectivity and yield, and unfavorable large-scale production, etc. Achieve the effect of shortening heat conduction time, improving production efficiency, and strengthening instability

Inactive Publication Date: 2018-06-08
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN100556881 A discloses a kind of method of ethylene glycol monoethyl ether, and this method adopts membrane reactor, reacts in membrane after the reaction raw material is vaporized, but ubiquitous catalyst active site is few, alcohol ether selectivity and productive rate are relatively low. Low, not conducive to large-scale production

Method used

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  • System and method for continuously preparing alcohol ethers by microwave catalysis

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Comparison scheme
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Embodiment 1

[0081] This embodiment provides a system for continuously preparing propylene glycol methyl ether by microwave catalysis, and its structural schematic diagram is as follows figure 1 As shown, the system includes a microwave reaction unit, an air stripping absorption unit and a product refining unit connected in sequence.

[0082] Described microwave reaction unit comprises microwave reactor 1, and described stripping absorption unit comprises interconnected stripping tower 2 and absorption tower 3; The outlet of the top of the stripper 2 is connected with the feed inlet of the absorption tower 3, the outlet of the bottom of the stripper 2 is connected with the product refining unit, and the outlet of the absorption tower 3 It is connected with the feeding port of microwave reactor 1.

[0083] Described microwave reactor 1 comprises primary microwave reactor 11 and secondary microwave reactor 12, and the bottom discharge port of described primary microwave reactor 11 is connec...

Embodiment 2

[0087] This embodiment provides a system for continuously preparing propylene glycol methyl ether by microwave catalysis, and the system includes a microwave reaction unit, an air stripping absorption unit and a product refining unit connected in sequence.

[0088] Described microwave reaction unit comprises microwave reactor 1, and described stripping absorption unit comprises interconnected stripping tower 2 and absorption tower 3; The outlet of the top of the stripper 2 is connected with the feed inlet of the absorption tower 3, the outlet of the bottom of the stripper 2 is connected with the product refining unit, and the outlet of the absorption tower 3 It is connected with the feed inlet of the microwave reactor 1, and the pipeline of the mixing feed inlet of the microwave reactor 1 is respectively connected with the feed pipeline of propylene oxide, the feed pipeline of methanol and the circulation pipeline of light components.

[0089] A microwave device is arranged in...

Embodiment 3

[0092] This embodiment provides a system for continuously preparing ethylene glycol methyl ether by microwave catalysis, the system includes a microwave reaction unit, an air stripping absorption unit and a product refining unit connected in sequence.

[0093] Described microwave reaction unit comprises microwave reactor 1, and described stripping absorption unit comprises interconnected stripping tower 2 and absorption tower 3; The outlet of the top of the stripper 2 is connected with the feed inlet of the absorption tower 3, the outlet of the bottom of the stripper 2 is connected with the product refining unit, and the outlet of the absorption tower 3 It is connected with the feeding port of microwave reactor 1.

[0094] Described microwave reactor 1 comprises primary microwave reactor 11 and secondary microwave reactor 12, and the bottom discharge port of described primary microwave reactor 11 is connected with the inlet of secondary microwave reactor 12, and described seco...

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Abstract

The invention provides a system and method for continuously preparing alcohol ethers by microwave catalysis. The system includes a microwave reaction unit, a gas stripping absorption unit and a product refining unit which are connected in sequence. The system provided by the invention utilizes the advantages that microwave has good penetration performance on a polar system and no contact and accelerates the intermolecular rotating friction effect, so that a reaction induction period is eliminated, reaction residence time is shortened, the reaction speed is improved, the probability of generation of by-products is reduced, and the technological process is simplified; and through an operation such as gas stripping absorption, unreacted raw materials are separated and recycled, so that the product yield is improved, and the energy consumption of light component separation is reduced.

Description

technical field [0001] The invention belongs to the field of organic chemical solvents, and relates to a system and method for continuously preparing alcohol ethers by microwave catalysis. Background technique [0002] Alcohol ether is a good traditional organic chemical solvent, which is widely used in fuel antifreeze, cleaning agent, extraction agent, flexo printing ink, screen printing ink and non-ferrous metal beneficiation agent, among which ethylene glycol monomethyl ether and propylene glycol Monomethyl ether is two types of bulk solvent products commonly used in industry. Propylene glycol monomethyl ether (PM) is a green, environmentally friendly, non-toxic, excellent performance, and widely used chemical solvent. Its demand is second only to ethylene glycol monomethyl ether. In the increasingly stringent environmental protection requirements Under certain circumstances, it is also the solvent product that is most likely to replace the toxic medium glycol ether, and...

Claims

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Application Information

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IPC IPC(8): C07C41/03C07C41/34C07C41/42C07C43/10C07C43/13
CPCC07C41/03C07C41/34C07C41/42C07C43/10C07C43/13
Inventor 刘瑞霞陈篙嵩张军平赵秋杨普
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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