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Method for generating camphene and tricyclene by pinene isomerization

A technology for isomerization and tricycloalkene, applied in the field of isomerization of pinene to generate camphene and tricycloalkene, can solve the problems of catalyst filtration difficulty, loss, and labor intensity, and achieve mild reaction conditions and high catalyst activity , good selective effect

Inactive Publication Date: 2015-04-08
SHANGHAI HUAYI GRP CO
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that there are problems in the prior art that the labor intensity is high, the catalyst is difficult to filter, and the loss after filtration is serious, and a new method for isomerizing pinene to generate camphene and tricyclic alkenes is provided

Method used

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  • Method for generating camphene and tricyclene by pinene isomerization
  • Method for generating camphene and tricyclene by pinene isomerization

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Effect test

Embodiment 1～13

[0014] 100 grams of catalysts molded in different proportions of metatitanic acid, binder and extrusion aid were respectively loaded into a fixed-bed reactor, and the raw material pinene was injected into the reactor with a metering pump for reaction. The reaction conditions and reaction results are shown in Table 1.

[0015] Table 1.

[0016]

[0017]

[0018] As can be seen from the above table 1: due to the selection of a highly active catalyst, the selectivity of camphene and tricyclic alkenes produced by the preparation method of the present invention is as high as 82.7%, and the conversion rate of pinene is as high as more than 99%, and the The preparation method has mild conditions and is environmentally friendly, and can be widely used in camphene and industrial production.

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Abstract

The invention relates to a method for generating camphene and tricyclene by pinene isomerization, and aims at solving the problems of high labor intensity, difficult catalyst filtering and large loss after filtration in the prior art. The method for generating camphene and tricyclene by pinene isomerization comprises the following step: feeding a pinene raw material into a fixed bed reactor to contact with a catalyst for isomerization reaction under the conditions that the reaction temperature is 50 to 200 DEG C, the mass space velocity of tricyclene is 0.1 to 10h<-1>, and the reaction pressure ranges from normal pressure to 1.0MPaG so as to generate a product containing camphene and tricyclene, wherein the base material of the catalyst is metatitanic acid or 5 to 95% in percentage by mass of a mixture containing metatitanic acid. According to the technical scheme, the method has the advantages that the problems above can be solved, and the method can be applied to the preparation of camphene and tricyclene by pinene isomerization.

Description

technical field [0001] The invention relates to a method for isomerizing pinene to generate camphene and tricyclic alkenes. Background technique [0002] Both camphene and tricyclic alkenes are obtained by molecular rearrangement of pinene, and the two can be transformed into each other and have the same chemical properties. Camphene and tricyclene are important fine chemical intermediates, mainly used in the synthesis of isobornyl acetate, camphor, flavors and fragrances, synthetic materials, pesticides, etc. Camphene is produced by the isomerization reaction of pinene in turpentine under the action of a catalyst. The isomerization products of pinene are complicated, and the boiling points of pinene, camphene and tricyclene are close, so the separation is difficult. Therefore, under the condition of high pinene conversion rate, improving the selectivity of camphene and tricyclic alkenes has become the main purpose of researchers. [0003] Chinese patent CN 200810099188.4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/40C07C13/605C07C5/25C07C5/31
Inventor 宁春利刘金龙章琪均张春雷
Owner SHANGHAI HUAYI GRP CO
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