Method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde

A technology of paraformaldehyde and dimethyl ether, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high cost of paraformaldehyde and low catalyst reaction efficiency, etc.

Active Publication Date: 2018-02-13
CHINA PETROLEUM & CHEM CORP +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low catalyst reaction efficiency and high cost of paraformaldehyde as raw material in the process of synthesizing polyoxymethylene dimethyl ether with methanol, methylal and paraformaldehyde as raw materials in the prior art. A new method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde and a new catalyst suitable for the process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde
  • Method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / COF-102 (the molar ratio of covalent group to ligand is 0.1), wherein the mass fraction ratio of solid superacid to COF-102 carrier is 20:80, 100 grams of methanol and 100 grams of paraformaldehyde, at 130 ° C React with 0.8MPa autogenous pressure for 4h, extract the sample and analyze it by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw material methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

Embodiment 2

[0021] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / COF-105 (the molar ratio of covalent group to ligand is 0.1), wherein the mass fraction ratio of solid superacid to COF-105 carrier is 20:80, 100 grams of methanol and 100 grams of paraformaldehyde, at 130 ° C React with 0.6MPa autogenous pressure for 4h, extract the sample and analyze it by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw material methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

Embodiment 3

[0023] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / COF-108 (the molar ratio of covalent group and ligand is 0.1), wherein the mass fraction ratio of solid superacid and COF-108 carrier is 20:80, 100 grams of methylal and 100 grams of paraformaldehyde, in React at 130°C and 0.6MPa autogenous pressure for 4 hours, extract the sample and analyze it by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methylal and paraformaldehyde, and its composition distribution is shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde, which mainly solves the problems of low catalyst reaction efficiency and high cost of paraformaldehyde as a raw material in the past. The present invention is by taking methanol, methylal and paraformaldehyde as raw material, wherein methanol: methylal: the mass ratio of paraformaldehyde is (0~10): (0~10): 1, wherein methanol and methylal The dosage cannot be 0 at the same time. Under the conditions of reaction temperature of 70-200°C and reaction pressure of 0.2-6MPa, the raw material is in contact with the catalyst to generate polyoxymethylene dimethyl ether. The catalyst dosage is 0.05-10% of the weight of the raw material, of which The catalyst used includes the following components in terms of weight fraction: a) 30-80 parts of covalent organic aggregate carrier (COFs); b) 20-70 parts of solid superacid technical solution, which better solves this problem, It can be used in the industrial production of polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde, in particular to a method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde as a raw material. Background technique [0002] In recent years, with the deepening influence of the industrial revolution and my country's unique resource pattern of "more coal, less oil, and gas", my country's oil resources have become increasingly tense, and the pressure on oil supply has increased unprecedentedly. It is estimated that in the next 10 to 20 years, my country's oil supply rate will only be ~50%. How to use our country's rich coal resources to solve our country's energy crisis has become an urgent problem for scientific researchers. Therefore, the development of new oil substitutes from coal-based methanol has attracted increasing attention. [0003] DME was first proposed as a diesel additive. However, due to its poor cold start per...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/30C07C41/56
Inventor 杨为民高晓晨高焕新石竹刘志成杨贺勤贾银娟
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap