Preparation of bicyclohexyl neopentyl glycol single ketal

A technology of pentylene glycol monoketal and neopentyl glycol, which is applied in the fields of chemical instruments and methods, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., and can solve the problem of troublesome operation process, large environmental pollution, Complicated preparation methods, etc.
CN101407512AActive Publication Date: 2009-04-15HEBEI MAIERSTON ELECTRONICS MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEBEI MAIERSTON ELECTRONICS MATERIAL
Publication Date
2009-04-15

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Abstract

The invention relates to preparation of an organic compound, in particular to a method for preparing dicyclohexyl pentanediol mono-ketal and belongs to the technical field of organic compound preparation. The method takes dicyclohexyl diketone and neopentyl glycol as the raw materials to carry out the catalytic reaction under the catalyst of inert solvent cyclohexane and strong acid cation exchange resin, the reaction temperature is 0 to 110 DEG C, the dicyclo mono-ketal is prepared, and the conversion rate can reach 80 to 95 percent; simultaneously, dicyclohexyl pentanediol mono-ketal with high yield and high purity is obtained by acetone-water system, and the method is beneficial to later preparation of mono-crystalline, alkene and the like.
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Description

technical field

[0001] The invention relates to a preparation of organic compounds, in particular to a preparation method of dicyclohexylpentanediol monoketal, which belongs to the technical field of preparation of organic compounds. Background technique

[0002] Cyclohexyl diketone monoketal: such as 1,4-cyclohexyl diketone ethylene glycol monoketal and 4,4'-bicyclohexyl diketone ethylene glycol monoketal, used in medicine, pesticides, spices, liquid crystal display materials And synthetic intermediates and other aspects have very important applications.

[0003] Courtot, P (Bull.SOC.Chim, Fr 1962.1943-1944) reported that 1,4-cyclohexanedione was refluxed with equimolar ethylene glycol to obtain 1,4-cyclohexanedione, 1,4-cyclohexyl The mixture of diketone monoethyl ketal and 1,4-cyclohexanedione diethyl ketal, the content ratio is 1:1:1; 1,4-cyclohexanedione is soluble in water to remove, and the residue Sodium bisulfate treatment (1,4-cyclohexanedione diethyl ketal does ...

Claims

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