Production increasing technology of dimethyl carbonate

A technology of dimethyl carbonate and process is applied in the field of increasing production of dimethyl carbonate, and can solve the problems of unclear reaction mechanism, unstable DMC output, complex reaction by-products and the like

Inactive Publication Date: 2017-07-21
TIANJIN PULAI CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Counclert et al. proposed a method of cyclically preparing solid phosgene, in which DMC was completely chlorinated to generate solid phosgene (BTC, solid phosgene melting point 79-82°C, white crystal at ro

Method used

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  • Production increasing technology of dimethyl carbonate

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Experimental program
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Effect test

Embodiment 1

[0027] Take 180g of dimethyl carbonate in a 250ml four-neck flask, stir with a magnetic force, and the intensity of ultraviolet light is 1325uW / cm 2 The rate of chlorine flow is 135ml / min, and the reaction is carried out, and the tail gas is absorbed by a two-stage method. The process is condensed and refluxed to reduce the loss of raw materials under conditions such as volatilization at high temperature and being carried out by gas. React at 35-45°C for 14 hours, blow off with inert gas for half an hour, wait for the reaction product to cool to room temperature, use a pipette gun and an analytical balance to calculate the specific gravity of the chlorinated solution to be 1.1001. Then react at 75-85°C for 14 hours, stop the light, blow off with an inert gas for half an hour, and cool the reaction product to room temperature to obtain a chlorinated solution with a specific gravity of 1.555. The weight gain of the system was 176.1984g, and the chlorination rate of the trichlor...

Embodiment 2

[0031] Take 180g of dimethyl carbonate in a 250ml four-necked flask, stir it under magnetic force, and the intensity of ultraviolet light is 1000uW / cm 2 The rate of chlorine flow is 135ml / min, and the reaction is carried out, and the tail gas is absorbed by a two-stage method. The process is condensed and refluxed to reduce the loss of raw materials under conditions such as volatilization at high temperature and being carried out by gas. React at 35-45°C for 12 hours, blow off with inert gas for half an hour, wait for the reaction product to cool to room temperature, use a pipette gun and an analytical balance to calculate the specific gravity of the chlorinated solution to be 1.0001. Then react at 75-85°C for 12 hours, stop the light, blow off with an inert gas for half an hour, and cool the reaction product to room temperature to obtain a chlorinated solution with a specific gravity of 1.446. The weight gain of the system was 136.6407g, and the chlorination rate of trichlor...

Embodiment 3

[0034] Take 180g of dimethyl carbonate in a 250ml four-necked flask, and react under magnetic stirring, the ultraviolet light intensity is 1325uW / cm2 and the rate of chlorine flow is 135ml / min, and the tail gas is absorbed by a two-stage method. The process is condensed and refluxed to reduce the loss of raw materials under conditions such as volatilization at high temperature and being carried out by gas. The reaction was carried out at 35-45°C for 12 hours, blown off with an inert gas for half an hour, and the reaction product was cooled to room temperature, and the specific gravity of the chlorinated solution was calculated to be 1.0868 with a pipette gun and an analytical balance. Then react at 75-85°C for 12 hours, stop the light, blow off with an inert gas for half an hour, and cool the reaction product to room temperature to obtain a chlorinated solution with a specific gravity of 1.527. The weight gain of the system was 163.1431g, and the chlorination rate of the trich...

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Abstract

The invention provides a production increasing technology of dimethyl carbonate, which increases the production of dimethyl carbonate through chlorine and methyl alcohol. The technology basically comprises the following steps: incomplete chloro compounds produced by depth chloro during production of dimethyl carbonate are reacted with methyl alcohol, and dimethyl carbonate is further produced, so that the production increasing of dimethyl carbonate is realized. According to the technology, the production increasing of dimethyl carbonate is realized through chlorine and dimethyl carbonate, and the problems that chlorine in a chlor-alkali plant is excess in production capacity and difficult to utilize are effectively solved.

Description

technical field [0001] The invention relates to the field of dimethyl carbonate production, in particular to a process for increasing the production of dimethyl carbonate. Background technique [0002] Dimethyl carbonate (DMC) is an important organic chemical raw material with abundant downstream products. It is a colorless and transparent liquid with a slight fragrance at room temperature. It is miscible with common organic solvents and can be used as carbonylation reagent, methoxylation and formazan Base reagents, gasoline additives, etc. At present, there are two types of production processes for dimethyl carbonate, the phosgene synthetic route, which requires the use of highly toxic phosgene to generate methyl chloroformate, which has been banned in many developed countries; and the non-phosgene route of methanol carbonylation oxidation , transesterification and urea alcoholysis, methanol-CO2, electrochemical synthesis and other clean synthesis methods. Counclert et al...

Claims

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Application Information

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IPC IPC(8): C07C68/00C07C68/06C07C69/96C07C17/08C07C21/06
CPCC07C17/08C07C68/00C07C68/06C07C69/96C07C21/06Y02P20/10
Inventor 李柏春耿钰淞李晓红
Owner TIANJIN PULAI CHEM TECH
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