Method for preparing cis-pinane by catalyzing alpha-pinene hydrogenation by means of palladium-nickel bimetallic catalyst

A catalyst and hydrogen preparation technology, applied in catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problem of high cost of precious metal catalysts, achieve the effect of simple and easy reaction process, reduce production costs, and prevent aggregation and deactivation

Active Publication Date: 2017-01-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of high cost of using a single noble metal catalyst in the existing α-pinene selective hydrogenation reaction, the present invention provides a palladium-

Method used

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  • Method for preparing cis-pinane by catalyzing alpha-pinene hydrogenation by means of palladium-nickel bimetallic catalyst
  • Method for preparing cis-pinane by catalyzing alpha-pinene hydrogenation by means of palladium-nickel bimetallic catalyst
  • Method for preparing cis-pinane by catalyzing alpha-pinene hydrogenation by means of palladium-nickel bimetallic catalyst

Examples

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Embodiment 1

[0017] [Example 1] Preparation of P123 micelle-stabilized palladium-nickel bimetallic nanoparticle catalyst

[0018] Add 3mL of P123 solution (10mg / mL), 1.5mg of palladium chloride, 1.5mg of nickel chloride, and 10mg of tetrabutylphosphine bromide into a 75mL autoclave lined with polytetrafluoroethylene, and stir well at room temperature to dissolve. Then 0.5 mL of sodium borohydride solution (0.2 mol / L) was slowly added dropwise at 30°C. After the dropwise addition was completed, the stirring was continued for 10 min, and the obtained black liquid was the palladium-nickel bimetallic nanoparticle catalyst a.

[0019] attached figure 1 It is shown that the prepared palladium-nickel bimetallic nanoparticles have a particle size of about 5.0nm and good dispersion. attached figure 2 The data show that the prepared nanoparticles are palladium-nickel bimetallic nanoparticles. attached image 3 It shows that the palladium-nickel mass ratio of the palladium-nickel bimetallic nan...

Embodiment 2

[0020] [Example 2] P123 micelle-stabilized palladium-nickel bimetallic nanoparticle catalyst catalyzes α-pinene hydrogenation reaction

[0021] 0.4g α-pinene and 3mg sodium carbonate are added in the reactor that fills the catalyst a that embodiment 1 makes, first with hydrogen the air in the reactor is replaced five times, then charge 0.7MPa H 2 , Stir the reaction at 50°C for 3h. After the reaction, the upper product phase was collected and quantitatively analyzed by gas chromatography. The conversion rate of α-pinene was 99.8%, and the selectivity of cis-pinane was 96.3%.

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Abstract

The invention relates to a method for preparing cis-pinane by catalyzing a hydrogenation reaction of alpha-pinene under the mild condition by taking palladium-nickel bimetallic nanoparticles with stable polyethylene oxide-polypropylene oxide-polyethylene oxide three-block copolymer (P123) micelle as a catalyst, and belongs to the field of catalyst preparation and application. According to the method for catalyzing the hydrogenation reaction of alpha-pinene by means of the palladium-nickel bimetallic catalyst in an aqueous medium, reacting under stirring is conducted for 3 h under the conditions of 0.7 MPa H2 and 50 DEG C, the conversion rate of alpha-pinene can reach 99.8%, and the selectivity of cis-pinane is 96.3%. The method is easy and convenient to operate and friendly to environment; especially, the bimetallic catalyst is adopted, the dosage of noble metal palladium is decreased, the catalyst cost is reduced, and the selectivity of cis-pinane is improved. An environment-friendly novel way is provided for selective preparation of cis-pinane.

Description

technical field [0001] The invention relates to a method for catalytically preparing cis-pinane with a palladium-nickel bimetallic catalyst in an aqueous phase. Specifically, it is a palladium-nickel bimetallic nanoparticle stabilized by polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) micelles as a catalyst, which catalyzes α - A new method for preparing cis-pinane with pinene hydrogenation with high selectivity, which belongs to the field of catalyst preparation and application. Background technique [0002] α-pinene is an important natural product extracted from Pinaceae plants. my country is one of the main producing areas of α-pinene, but most of them are directly exported in the form of raw materials, and the refined utilization rate is low. In industrial production, cis-pinane and trans-pinane can be obtained by hydrogenating α-pinene. Among them, cis-pinane is an important chemical intermediate and is important in the fields of fl...

Claims

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Application Information

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IPC IPC(8): C07C5/03C07C13/40B01J31/30
CPCB01J31/30B01J2231/645C07C5/03C07C2531/06C07C13/40
Inventor 解从霞侯胜利于凤丽袁冰王小燕于世涛
Owner QINGDAO UNIV OF SCI & TECH
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