Synthesis method of methylal

A synthesis method and methylal technology are applied in chemical instruments and methods, preparation of organic compounds, sustainable manufacturing/processing, etc., which can solve the problems of cumbersome production process, low conversion rate of wastewater, and high acid content, and achieve wastewater It is convenient to handle, reduces labor intensity, and solves the effects that are not easy to handle

Inactive Publication Date: 2014-03-26
HUIZHOU LIERAN CHEM
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most methylal production enterprises in China use sulfuric acid catalytic method for production. Because the production of this process requires 98% concentrated sulfuric acid as a catalyst, the production process is relatively cumbersome, the process operation is mostly manual, and the product index is difficult to control. There are many uncertain factors in the quality. T

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A solid acid primary synthesis method, comprising the steps of:

[0026] Formaldehyde is injected into the methylal synthesis tower with a formaldehyde feeding pump and mixed with methanol from the methanol metering tank and injected into the methanol feeding pump at a volume ratio of 1:1. The CR4 strong acidic cationic solid acid in the reactive distillation tower is catalyzed Under the action of continuous reaction to generate methylal; adjust the amount of feed to control the output of the product, adjust the reaction temperature to 75 ° C, control the reaction speed and the content of effective substances in the waste water; the product gas is extracted from the top of the reactive distillation tower, and the two Two condensers connected in series cool down the product.

[0027] In order to ensure the purity of the product, a part of the product is extracted to the methylal metering tank, and the other part is refluxed to the top of the reaction tower as a process l...

Embodiment 2

[0030] A solid acid primary synthesis method, comprising the steps of:

[0031] Formaldehyde is injected into the methylal synthesis tower with a formaldehyde feeding pump and mixed with methanol from the methanol metering tank and injected into the methanol feeding pump at a volume ratio of 1:1. The CR4 strong acidic cationic solid acid in the reactive distillation tower is catalyzed Under the action of continuous reaction to generate methylal; adjust the amount of feed to control the output of the product, adjust the temperature of the reaction to 85 ° C, control the reaction speed and the content of effective substances in the waste water; the product gas is extracted from the top of the reactive distillation tower, using two Two condensers connected in series cool down the product.

[0032] In order to ensure the purity of the product, part of the product is extracted to the methylal metering tank, and the other part is refluxed to the top of the reaction tower as a proces...

Embodiment 3

[0035] A solid acid primary synthesis method, comprising the steps of:

[0036] Formaldehyde is injected into the methylal synthesis tower with a formaldehyde feeding pump and mixed with methanol from the methanol metering tank and injected into the methanol feeding pump at a volume ratio of 1:1. The CR4 strong acidic cationic solid acid in the reactive distillation tower is catalyzed Under the action of continuous reaction to generate methylal; adjust the amount of feed to control the output of the product, adjust the reaction temperature to 80°C, control the reaction speed and the content of effective substances in the waste water; the product gas is extracted from the top of the reactive distillation tower, and the two Two condensers connected in series cool down the product.

[0037] In order to ensure the purity of the product, a part of the product is extracted to the methylal metering tank, and the other part is refluxed to the top of the reaction tower as a process liq...

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

No PUM Login to view more

Abstract

The invention relates to a synthesis method of methylal, and belongs to the technical field of chemical product preparation. The synthesis method comprises the specific steps: pumping formaldehyde into a formaldehyde synthesis tower by a formaldehyde feeding pump, mixing with methanol coming from a methanol measuring tank and pumped by a methanol feeding pump, and carrying out a reaction to generate methylal under the action of a catalyst in a reactive rectifying tower; adjusting the feeding ratio and the feeding amount to control the purity and the yield of the product, adjusting the reaction temperature to control the reaction speed and the content of effective substances in waste water, and ensuring to reach waste water discharge requirements; and taking out the product gas from the top of the reactive rectifying tower, and cooling the product by utilizing two condensers connected with each other in series. The method is simple in operation, low in consumption of the raw materials, and high in conversion rate; and the product is qualified and discharged at a time, and has stable quality.

Description

technical field [0001] The invention relates to a solid acid one-time synthesis method, in particular to a synthesis method for generating methylal by reacting methanol and formaldehyde under the action of a catalyst, and belongs to the technical field of chemical product preparation. Background technique [0002] Energy is the foundation of national economic development, and one of the three most noteworthy key issues in my country's economic development is the issue of energy structure. As a primary energy source, petroleum resources have only 40 years left to recover from the world's average recoverable reserves. Since 1993, my country has changed from an oil exporter to an importer, and the shortage of oil is increasing year by year. In 2000, my country imported 70 million tons of crude oil and 30 million tons of refined oil. Experts predict that by 2005, my country's oil imports will reach 115 million tons, and in 2010 it will reach 150 million tons. Therefore, it is...

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
IPC IPC(8): C07C43/30C07C41/56
CPCC07C41/56C07C43/30Y02P20/10
Inventor 黄志平
Owner HUIZHOU LIERAN CHEM
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