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A kind of method for preparing 2-isopropyl-5-methyl-2-hexenal by solid base catalysis

A technology of solid base catalyst and hexenal, which is applied in the field of raw materials, achieves the effects of simple separation and purification, reduction of treatment and discharge, and reduction of a large amount of raw materials and residues

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is no report about the preparation of 2-isopropyl-5-methyl-2-hexenal by solid base catalyzed 3-methylbutyraldehyde (isovaleraldehyde).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the preparation of potassium hydroxide-calcium oxide solid base

[0027] Dissolve 1 part of KOH in 8 parts of distilled water by mass, then add 4 parts of CaO activated at 800°C for 4 hours, stir well and let stand for 24 hours, then dry at 80°C for 24 hours. The resulting solid sample was heated to 400°C at a rate of 5°C / min, and then kept at a constant temperature for 5 hours to obtain a solid powdered potassium hydroxide-calcium oxide solid base with a potassium mass percentage of 13.9%, which was used as a catalyst.

Embodiment 2

[0028] Embodiment 2: the preparation of potassium hydroxide-calcium oxide solid base

[0029] Dissolve 1 part of KOH in 138 parts of distilled water by mass, then add 69 parts of CaO activated at 800°C for 4 hours, stir well and let stand for 24 hours, then dry at 80°C for 24 hours. The resulting solid sample was heated to 400°C at a rate of 5°C / min, and then kept at a constant temperature for 5 hours to obtain a solid powdered potassium hydroxide-calcium oxide solid base with a potassium mass percentage of 1%, which was used as a catalyst.

Embodiment 3

[0030] Embodiment 3: the preparation of potassium hydroxide-calcium oxide solid base

[0031] Dissolve 1 part of KOH in 32 parts of distilled water by mass, then add 16 parts of CaO activated at 800°C for 4 hours, stir well and let stand for 24 hours, then dry at 80°C for 24 hours. The resulting solid sample was heated to 400°C at a rate of 5°C / min, and then kept at a constant temperature for 5 hours to obtain a solid powdered potassium hydroxide-calcium oxide solid base with a potassium mass percentage of 4%, which was used as a catalyst.

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PUM

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Abstract

The invention provides a method for preparing 2-isopropyl-5-methyl-2-hexenal by using 3-methylbutyraldehyde as a raw material and solid alkali of alkaline earth metal oxide supported alkali metal hydroxide or alkali carbonate as a catalyst. The method provided by the invention has the advantages that an alkaline aqueous solution is avoided, thus treatment and discharge of alkaline wastewater are reduced; the prepared solid alkali catalyst has higher activity, can be used for preparing the 2-isopropyl-5-methyl-2-hexenal with higher yield and makes separation and purification of the product simpler.

Description

technical field [0001] The invention relates to a method for preparing 2-isopropyl-5-methyl-2-hexenal by solid base-catalyzed aldol condensation, in particular to a method for loading alkali metal hydroxide or alkali metal carbon with alkaline earth metal oxide The solid base of acid salt is used as a catalyst, and 2-isopropyl-5-methyl-2-hexenal is prepared by aldol condensation with 3-methylbutyraldehyde (isovaleraldehyde) as raw material. Background technique [0002] The 2-isopropyl-5-methyl-2-hexenal involved in the present invention is an intermediate for preparing 2-isopropyl-2-isopentyl-1,3-dihydroxypropane. 2-isopropyl-2-isoamyl-1,3-dihydroxypropane can be used as a fuel additive, solvent, metal ion complexing agent, and for the preparation of Ziegler-Natta catalysts, used in olefin polymerization, especially in the polymerization of propylene. [0003] Generally, 2-isopropyl-5-methyl-2-hexenal is prepared by catalytic condensation of 3-methylbutyraldehyde (isovale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C47/21C07C45/74B01J23/04
CPCC07C45/74C07C47/21
Inventor 赵思源孙竹芳姜健准谢伦嘉田宇冯再兴
Owner CHINA PETROLEUM & CHEM CORP
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