Method for recovering methyl chloride in discharged tail gas of glyphosate / dimethyl phosphate production

A technology of dimethyl phosphite and a recovery method, which is applied in the field of recovery of methyl chloride in tail gas, can solve problems such as reducing economic income, environmental air impact, etc., to ensure stable operation, improve production efficiency, and have significant environmental and economic benefits. Effect

Active Publication Date: 2009-04-15
HUBEI TAISHENG CHEM
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The exhaust gas is discharged without treatment, which will reduce a certain amount of economic i

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 recovering methyl chloride in discharged tail gas of glyphosate / dimethyl phosphate production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0010] The tail gas from the glyphosate / dimethyl phosphite production process enters the gas-liquid separator through the buffer tank to separate the water and then enters the cabinet; the methyl chloride in the gas cabinet enters the condenser through the gas-liquid separator, and the condenser The condensing temperature is -15°C to condense and separate the water in the gas. The chloromethane gas from the condenser passes through a three-stage water washing tower, a first-stage alkali washing tower, and a fourth-stage concentrated acid tower for drying treatment, and the chlorine is removed by water washing. The methanol component in the methane gas, the acidic component in the methyl chloride gas is removed by alkali washing, and the moisture in the methyl chloride gas is removed by concentrated acid drying. The specifications of each tower are ∮800×8000, and ∮38PP stepped ring is installed inside, and wire mesh corrugated packing is installed on the top to increase the abso...

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 discloses a method for recycling methyl chloride in tail gas emitted by glyphosate/ dimethyl phosphite production, wherein, after gas-liquid separation, condensation, bathing, alkali cleaning, and drying are carried out on tail gas from the production technology of glyphosate/ dimethyl phosphite, arid methyl chloride is compressed by a compressor and then copiously cooled to obtain methyl chloride; partial non-condensable gas unable to be absorbed through a freezing method is fed in the compressor through methyl chloride filtered by an organic vapor membrane to be compressed again; the rest gas is discharged to the upper air. The method for recycling methyl chloride in tail gas emitted by glyphosate/ dimethyl phosphate production has the advantages that through the technology of combined copious cooling and organic vapor membrane recycling, the adoption of a DCS automatic air supply balanced system, and the core of a novel ripple packing tower, multi-level bathing, alkali cleaning, absorbing, and drying are carried out for repeatedly recycling methyl chloride gas, thus solving the problems of numerous gas production and unstable gas production of recycled methyl chloride, guaranteeing stable running of equipment, improving productivity effect, and improving recovery rate of methyl chloride from 93 percent to more than 99.5 percent; and environmental benefits and economic benefits are outstanding.

Description

technical field [0001] The invention relates to a method for recovering methyl chloride gas, in particular to a method for recovering methyl chloride in the tail gas produced in the production process of glyphosate / dimethyl phosphite. Background technique [0002] At present, the total domestic production capacity of glyphosate and dimethyl phosphite has reached more than 600,000 tons, and the annual by-product of methyl chloride tail gas is more than 400,000 tons. Enterprises cannot effectively recycle the by-product tail gas chloromethane. Chloromethane is a colorless, odorous gas that is toxic to humans. If the tail gas is discharged without treatment, it will reduce a sum of economic income for the enterprise, and more importantly, it will have a serious impact on the ambient air. Contents of the invention [0003] The object of the present invention is to provide a method for recovering methyl chloride in the exhaust tail gas produced by glyphosate / dimethyl phosphit...

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): C07C19/03C07C17/38B01D53/00C07F9/38
Inventor 熊涛于游海李群浩田义群
Owner HUBEI TAISHENG 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