Method for producing dialkyl carbonate

A technology of dialkyl carbonate and alkaryl, which is applied in the field of oxidative carbonylation of alcohol compounds to produce dialkyl carbonate, which can solve the problem of low production capacity of dimethyl carbonate, unsolved problems of equipment corrosion, and the use of catalysts. Large volume and other issues

Active Publication Date: 2008-08-06
CHINA PETROCHEM DEVMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese Patent No. CN1197792A (1998) uses cuprous chloride as the main catalyst, and magnesium chloride, calcium chloride, zinc chloride, potassium chloride, etc. are cocatalysts to prepare a composite catalyst of alkaline earth metals. Although this catalyst system improves the chlorination The dissolubility of cuprous in the reaction solution, but still do not solve the corrosion problem of equipment; The Japanese Patent No. 54-24827 is the same with cuprous chloride as the main catalyst, and adds alkali metal or alkaline earth m

Method used

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  • Method for producing dialkyl carbonate
  • Method for producing dialkyl carbonate
  • Method for producing dialkyl carbonate

Examples

Experimental program
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Embodiment

[0031] Conversion rate, selectivity and productive rate recorded in the description of the present invention are calculated according to the following methods:

[0032] Conversion rate (%)=reacted methanol (mol) / methanol feed amount (mol)×100%

[0033] Selectivity (%)=2× output of dimethyl carbonate (mol) / reacted methanol (mol)×100%

[0034] Yield (%) = Conversion (%) × Selectivity (%) × 100%

Embodiment 1

[0040] Repeat the steps of Comparative Example 1, and further add 2-methylimidazole as a co-catalyst, the number of moles of the co-catalyst is twice the number of moles of copper halide. The product was analyzed by gas chromatography, and the conversion, selectivity, and yield were calculated, and the results were recorded in Table 1.

Embodiment 2-7

[0042] Repeat the steps of Example 1, and use different catalysts and cocatalysts to react according to the list in Table 1. The product was analyzed by gas chromatography, and the conversion, selectivity, and yield were calculated, and the results were recorded in Table 1.

[0043] Table 1

[0044] catalyst

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PUM

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Abstract

Disclosed is a method for producing dialkyl carbonate comprising: using organic halide metal catalyst fit with at least one catalyst promoter containing nitrogen atoms to form a catalyst system in the presence of alcohol compound, carbon monoxide and oxygen gas, and carrying out a liquid-phase oxidative carbonylation reaction to obtain dialkyl carbonate. The method for producing dialkyl carbonate uses organic halide metal catalyst fit with the catalyst promoter containing nitrogen atoms, thereby improving the conversion rate, selectivity of catalysis, and reaction yield, and reducing catalyst consumption and reduce the corrosion on reactor.

Description

technical field [0001] The invention relates to a method for producing dialkyl carbonate by utilizing an alcohol compound, in particular to a method for producing dialkyl carbonate by utilizing an alcohol compound for oxidative carbonylation. Background technique [0002] Dimethyl carbonate is a very versatile product as an organic solvent or as a reactant instead of phosgene in the synthesis of other alkyl and aryl carbonates. These alkyl carbonates and aryl carbonates can be used as synthetic lubricants, solvents, plasticizers and organic glass monomers, and are used in methylation and carbonylation reactions, such as isocyanate, polyurethane and polycarbonate preparation. Other applications of dimethyl carbonate, as disclosed in U.S. Patent No. 2,331,386, use dimethyl carbonate or other organic carbonates, or mixtures of organic carbonates and ethers, especially methyl tert-butyl ether, as gasoline or additives for fuels heavier than gasoline to improve their antiknock ...

Claims

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Application Information

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IPC IPC(8): C07C68/00C07C69/96B01J31/22B01J31/30
Inventor 张芷维蔡嘉荣陈盈佃
Owner CHINA PETROCHEM DEVMENT
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