Method for catalytically synthesizing di-2-ethyhexyl carbonate by alkali ionic liquid

A technology of diisooctyl carbonate and synthesis method, which is applied in the direction of organic carbonate preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems such as no report of diisooctyl carbonate, and achieve high selectivity , simple operation process and high yield
CN101735064AInactive Publication Date: 2010-06-16DALIAN POLYTECHNIC UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN POLYTECHNIC UNIVERSITY
Publication Date
2010-06-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a catalytic synthesis method for ionic liquid of di-2-ethyhexyl carbonate and belongs to the technical field of synthesis of ester compounds in organic chemistry. The method comprises the following steps of: performing the two-step ester exchange reaction of isooctanol and methyl carbonate serving as raw materials by alkali ionic liquid serving as a catalyst, and distilling the products by decompression to obtain the di-2-ethyhexyl carbonate, wherein the negative ion in the alkali ionic liquid is one of [OAc]-, Im-, OH-, Br-, Cl- and I- ions or a compound system formed by more of [OAc]-, Im-, OH-, Br-, Cl- and I- ions, the positive ion is 1-alkyl 3-methylimidazole, and the length of the carbon chain of the alkyl group is 1 to 13. The ionic liquid is added in an amount of 1 to 50 percent based on the total mass of the reaction raw materials, and the yield of the di-2-ethyhexyl carbonate is 45 to 85 percent. The alkali ionic liquid is used as the catalyst in the method, so that the method has the advantages of recovery of the catalyst, stable quality and yield of the product, advanced and reasonable process and easy operation.
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Description

technical field

[0001] The invention relates to an ionic liquid catalytic synthesis method of diisooctyl carbonate, belonging to the technical field of catalytic synthesis of ester compounds in organic chemistry. Background technique

[0002] Diisooctyl carbonate is a colorless clean oil with strong polar ester group, good lubricating properties, low freezing point and pour point, good compatibility with hydrocarbon oils, and high thermal oxidation stability. One of the important chemical raw materials for synthetic base oil. Compared with other ester compounds, diisooctyl carbonate is not easy to saponify, and can rapidly biodegrade. It has a strong absorption effect on ultraviolet rays between 200-320nm, and can also be used as ultraviolet shielding in the fields of daily chemicals and functional materials. agent. The synthetic route of di-isooctyl carbonate mostly adopts dimethyl carbonate and iso-octanol as raw materials, uses solid base as catalyst, and synthesizes th...

Claims

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