Separation of 3,3-dimethylacrolein and -methyl-3-buten-1-ol by azeotropic distillation with water and glycerol专利检索-中间馏分油液体燃料燃料能源燃料种类专利检索查询-专利查询网

Separation of 3,3-dimethylacrolein and -methyl-3-buten-1-ol by azeotropic distillation with water and glycerol

阅读：856发布：2023-01-06

专利汇可以提供Separation of 3,3-dimethylacrolein and -methyl-3-buten-1-ol by azeotropic distillation with water and glycerol专利检索，专利查询，专利分析的服务。并且A process for separating, by distillation, a mixture consisting essentially of 3,3-dimethylacrolein and 3-methyl-3-buten-1-ol, wherein the mixture to be separated is distilled in the presence of water and glycerol, the 3,3-dimethyl-acrolein first being distilled off azeotropically with water and the 3-methyl-3-buten1-ol then being separated, as an azeotropic mixture with water, from the higher-boiling glycerol. It is also possible to isolate the 3,3-dimethylacrolein by distillation if the 3-methyl-3-buten1-ol is partially replaced by 3-methyl-2-buten-1-ol. The 3,3dimethylacrolein, which can be isolated in pure form by the process of the invention, is a valuable intermediate for the synthesis of natural substances such as citral, vitamin A and chrysanthemic acid.，下面是Separation of 3,3-dimethylacrolein and -methyl-3-buten-1-ol by azeotropic distillation with water and glycerol专利的具体信息内容。

权利要求

1. A PROCESS FOR SEPARATING 3,3-DIMETHYLACROLEIN FROM A MIXTURE CONTAINING 3-METHYL-3-BUTEN-1-OL WHICH COMPRISES: HEATING SAID MIXTURE IN CONTACT WITH WATER AND IN CONTACT WITH GLYCEROL WHEREBY AZEOTROPES OF BOTH 3,3-DIMETHYLACROLEIN AND 3-METHYL-3-BUTEN-1-OL ARE FORMED, SAID HEATING BEING CONTINUED AT LEAST UNTIL THE SAID 3,3-DIMETHYLACROLEIN IS DISTILLED OFF AZEOTROPICALLY WITH WATER AND THEREBY SEPARATED FROM SAID 3-METHYL-3-BUTEN-1-OL, THE AMOUNT OF WATER PRESENT IN THE MIXTURE BEING FROM 15 TO 100 PARTS BY WEIGHT PER 100 PARTS OF SAD MIXTURE AND THE AMOUNT OF GLYCEROL PRESENT IN SAIDMIXTURE BEING FROM 5 TO 30 PARTS BY WEIGHT PER 100 PARTS OF SAID MIXTURE.

2. A process as set forth in claim 1 wherein the amount of water in said mixture is from 20 to 40 parts by weight per 100 parts of said mixture.

3. A process as set forth in claim 1 wherein the amount of glycerol present in said mixture is from 8 to 20 parts by weight per 100 parts of said mixture.

4. A process as set forth in claim 1 wherein said mixture consists essentially of 3,3-dimethylacrolein and 3-methyl-3-buten-1-ol.

5. A process as set forth in claim 1 wherein said mixture consists essentially of 3,3-dimethylacrolein, 3-methyl-3-buten-1-ol and 3-methyl-2-buten-1-ol.

6. A process as set forth in claim 4 wherein 3-methyl-3-buten-1-ol is distilled off azeotropically with water after said 3,3-dimethylacrolein has been distilled from said mixture.

7. A process as set forth in claim 5 wherein 3-methyl-3-buten-1-ol and 3-methyl-2-buten-1-ol is distilled off azeotropically with water after said 3,3-dimethylacrolein has been distilled from said mixture.

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Separation of 3,3-dimethylacrolein and -methyl-3-buten-1-ol by azeotropic distillation with water and glycerol

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