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Preparation method for 2-propyl enanthol

A technology of propyl heptanol and catalyst, which is applied in the field of preparation of higher aliphatic alcohols, and can solve the problems of unreached, unsatisfactory high efficiency, low efficiency, etc.

Active Publication Date: 2009-10-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So this method is a very inefficient method
Similar methods can also be found in documents such as US4426542 and US4969953, and the defects of these methods are consistent
However, since different catalysts are still used in the two reaction sections, the complexity of the process cannot be avoided
The positive and negative ratio of the second reaction section is 6:1, which is not satisfactory
However, the existing technology cannot meet all the requirements for high-efficiency industrial production.

Method used

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  • Preparation method for 2-propyl enanthol
  • Preparation method for 2-propyl enanthol
  • Preparation method for 2-propyl enanthol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] In this example, a phosphite with the following structure is used as the catalyst ligand:

[0082]

[0083] Among the mixed butene raw materials used in hydroformylation, by mass ratio, 1-butene accounts for 62.7%, trans-2-butene accounts for 13.9%, cis-2-butene accounts for 9.0%, butane accounts for 12.9%, Isobutene content <1%.

[0084] The first hydroformylation reaction is carried out in a pressure vessel with a magnetically coupled stirring device. The device also has heating and temperature control parts, pressure display and control parts, and quantitative feeding parts of butene. The autoclave is connected to cylinders filled with synthesis gas and nitrogen. The test uses rhodium dicarbonyl acetylacetonate as a catalyst and toluene as a solvent. The specific operation steps are: preparing catalyst solution according to a certain concentration, adding it into a pressure vessel under the protection of nitrogen, and replacing it with nitrogen for 7 to 8 times...

Embodiment 2

[0096] Embodiment 2, two-stage hydroformylation reaction:

[0097] Adopt the method described in embodiment 1 to test, difference is that the mass concentration of catalyst rhodium is 400ppm, the first step allows reaction to be carried out at 55 ℃ for 1.5 hours, then the second step reaction is carried out at 85 ℃ for 1.5 hours, other Conditions remain the same. The result of the reaction is:

[0098] Table 4 hydroformylation reaction results

[0099] Olefin Conversion

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PUM

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Abstract

The invention relates to a preparation method for higher aliphatic alcohol, in particular to a method for preparing 2-propyl enanthol by taking mixed butylenes as a raw material. The method comprises the following steps of: taking the mixed butylenes as a raw material, and generating valeraldehyde through two stages of hydrogen formylation reactions; adopting the same catalyst different temperatures for the two stages of the reactions so as to improve the selectivity of the reactions and greatly improve the ratio of normal compounds to isomeric compounds of the valeraldehyde; obtaining olefinaldehyde through the condensation and dehydration of the valeraldehyde; and obtaining 2-propyl enanthol after hydrogenation and separation. The method is applied in the field of petrochemical industry.

Description

technical field [0001] The invention relates to a method for preparing higher fatty alcohols, in particular to a method for preparing 2-propylheptanol by using mixed butenes as raw materials. Background technique [0002] 2-Propylheptanol is a useful chemical raw material, for example, it can be used in the production of phthalates, which can be used as plasticizers for polyvinyl chloride resins. 2-Propylheptanol is usually prepared by oxo synthesis method, which includes: (1) butene is hydroformylated to produce valeraldehyde; (2) valeraldehyde is produced through condensation-dehydration reaction to enal; ( 3) Hydrogenation of alkenal to make final product. In these three steps, it is generally believed that the hydroformylation reaction is the most important, and its efficiency is the key to the entire preparation method. [0003] If the hydroformylation reaction adopts petroleum thermal cracking or petroleum refining process by-product mixed butene as raw material, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/125C07C29/141B01J31/24B01J31/28
Inventor 郭浩然朱丽琴王红红包天舒王蕴林
Owner CHINA PETROLEUM & CHEM CORP
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