DMC production system and method
A production system and production method technology, applied in the fields of carbon monoxide and oxygen preparation, organic chemistry, purification/separation of carbonate/haloformate, etc., can solve the problems of poor safety and stability of mechanical operation equipment, high power consumption, and reduction of nitric acid Low efficiency and other problems, to achieve high nitric acid reduction efficiency, reduce methanol content, reduce nitrogen oxides and aquatic side reactions
Pending Publication Date: 2020-11-10
HUBEI SANNING CHEM
View PDF0 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The stirred reactor is used, which has the disadvantages of high power consumption, low nitric acid reduction efficiency, poor safety and stability of mechanical operation equipment, etc.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] Such as figure 1 Among them, a kind of DMC production system comprises synthesis reaction main cycle; Described synthesis reaction main cycle comprises DMC synthesis reactor 1, circulation compressor 2, first esterification tower 3, ester removal tower 7;
[0039] One end of the DMC synthesis reactor 1 is connected with the first esterification tower 3 through the recycle compressor 2; the other end of the DMC synthesis reactor 1 is connected with the esterification tower 7 through the The other end of the first esterification tower 3 is connected.
[0040] Preferably, the DMC production system also includes an esterification parallel bypass; the esterification parallel bypass includes a second esterification tower 6 and a booster 8; the lower end of the second esterification tower 6 passes through a The compressor 8 is connected to the ester removal tower 7; the supercharger 8 adopts a centrifugal compressor or a centrifugal high-speed fan; preferably, the second este...
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
Login to View More Abstract
A DMC production system comprises a synthesis reaction main circulation ring, wherein the synthesis reaction main circulation ring comprises a DMC synthesis reactor, a circulation compressor, a firstesterification tower and an ester removal tower; one end of the DMC synthesis reactor is connected with one end of the first esterification tower through the circulating compressor; the other end of the DMC synthesis reactor is connected with the other end of the first esterification tower through the ester removal tower; the DMC production method comprises a synthesis reaction main circulation reaction and an esterification parallel bypass reaction. The invention has the advantages that a reaction rectification esterification parallel bypass is adopted, so that reduction efficiency of nitricacid is higher, the consumption of nitric acid is effectively reduced and the content of nitric acid in waste liquid is lower while various process parameters of DMC synthesis are met. The methanol consumption is effectively reduced, the methanol content of a gasification component returned to the DMC synthesis ring is effectively increased, and the methanol content in discharged waste liquid is reduced. Meanwhile, side reactions in the esterification tower are reduced, the generation amount of nitric acid and nitrous acid is reduced, and the esterification reaction efficiency is improved.
Description
technical field [0001] The invention relates to a system and a method for producing DMC by gas-phase carbonization. Background technique [0002] Dimethyl carbonate (dimethyl carbonate, DMC) is a chemical raw material with low toxicity, excellent environmental performance and wide application. It is an important intermediate in organic synthesis, and its molecular structure contains carbonyl, methyl and methoxy groups. And other functional groups, with a variety of reactive properties, in production, it has the characteristics of safe use, convenience, less pollution, and easy transportation. Due to its low toxicity, dimethyl carbonate is a "green" chemical product with development prospects. [0003] At present, the mature process of directly synthesizing DMC is methanol carbonylation coupling method. Which is currently in the sub-ester replenishment process. A stirred reactor is used, which has disadvantages such as high power consumption, low nitric acid reduction effi...
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
Login to View More IPC IPC(8): C07C68/01C07C68/08C07C69/96
CPCC07C68/08C07C68/01C07C69/96
Inventor 李万清游川北李发春张攀李兴彪汤虎青
Owner HUBEI SANNING CHEM