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Method for preparing camphene through isomerization of alpha-pinene

A technology for pinene and camphene, which is applied in the field of preparation of α-pinene isomerization to prepare camphene, can solve the problems of slow reaction rate and low camphene content, and achieves the effects of stable operation, large output and high yield

Active Publication Date: 2018-04-10
怀集县长林化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low camphene content in the final product and slow reaction rate in the existing camphene preparation method, the present invention discloses a preparation method for preparing camphene through isomerization of α-pinene. The preparation method can not only obtain The high concentration of camphene also effectively increases the speed of α-pinene isomerization and improves the production efficiency

Method used

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Effect test

preparation example Construction

[0018] The invention discloses a method for preparing camphene through isomerization of α-pinene, which comprises the following steps:

[0019] Step 1: the reaction raw material containing α-pinene is placed in the reactive distillation tower, is dropped into catalyst in the described distillation tower, and described catalyst is submerged under the liquid level that described α-pinene forms, to reactive distillation tower The tower kettle is heated, and α-pinene is catalyzed to form camphene under the action of catalyst, and part of α-pinene evaporates and rises, and a cooling device is arranged at the top of the reactive distillation tower, and the evaporated α-pinene Alkene is condensed and refluxed, a synthetic molecular sieve catalyst is set between the liquid level formed by the α-pinene and the cooling device, and the reaction duration is 0.5-2h to obtain the camphene mother liquor;

[0020] Step 2: putting the amphene mother liquor obtained into the first distillation ...

Embodiment 1

[0031] This embodiment discloses a preparation method for preparing camphene through isomerization of α-pinene, comprising the following steps:

[0032] Step 1: Place the reaction raw material containing α-pinene in the reaction distillation tower. After determination, the reaction raw material includes: 10% tricyclic alkenes, 75% camphene, other limonene, terpinolene, and fusel alcohols The content of longifolene and the like is 15%, and mordenite is dropped into the distillation tower, and the mordenite is submerged under the liquid level formed by the α-pinene, and the tower still of the reaction distillation tower is heated, and the reaction conditions Under normal pressure, the heating temperature of the α-pinene is 120°C-160°C, and the stirring is continued during the reaction process of the α-pinene, and the stirring speed is 160 revolutions per minute. Under the action of catalytic isomerization, camphene is formed, and part of the α-pinene evaporates and rises. A cool...

Embodiment 2

[0036] This embodiment discloses a preparation method for preparing camphene through isomerization of α-pinene, comprising the following steps:

[0037]Step 1: Place the reaction raw material containing α-pinene in the reaction distillation tower. After determination, the reaction raw material includes: 7% tricyclene, 73% camphene, other limonene, terpinolene, and fusel alcohols The content of longifolene and the like is 20%. Mordenite is dropped into the distillation tower, and the mordenite is submerged under the liquid level formed by the α-pinene, and the tower still of the reaction distillation tower is heated. The reaction conditions Under normal pressure, the heating temperature of the α-pinene is 120°C-160°C, and the stirring is continued during the reaction process of the α-pinene, and the stirring speed is 160 revolutions per minute. Under the action of catalytic isomerization, camphene is formed, and part of the α-pinene evaporates and rises. A cooling device is arr...

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Abstract

The invention discloses a method for preparing camphene through isomerization of alpha-pinene. The method comprises the following operation steps: 1, placing the reaction raw materials of alpha-pinenein a reaction distillation tower, heating the tower kettle of the reaction distillation tower, and carrying out a reaction to obtain a camphene mother liquor, wherein a catalyst is poured into the distillation tower, the alpha-pinene is subjected to catalytic isomerization under the action of the catalyst to form camphene, and a molecular sieve synthesis catalyst is arranged at the top portion ofthe formed alpha-pinene liquid surface; 2, pouring the obtained camphene mother liquor into a first distillation tower, and carrying out distillation separation on the tricyclic alkene in the camphene mother liquor at the tower top of the first distillation tower; and 3, pouring the camphene mother liquor treated in the step 2 into a second distillation tower, and carrying out distillation separation on the camphene at the tower top of the second distillation tower to obtain the high purity camphene. According to the present invention, with the method, the problems of low camphene content inthe final product and slow reaction rate in the existing camphene preparation method can be solved.

Description

technical field [0001] The invention relates to the technical field of camphene preparation technology, in particular to a method for preparing camphene through isomerization of α-pinene. Background technique [0002] Amphene is synthesized through pinene isomerization. At present, domestic and foreign production of pinene isomerization is generally common-grade amphene products, and the content of camphene is ≥ 96% (containing camphene=tricyclene+camphene), and the content of camphene is About 80%-83%, the reason is mainly because the existing camphene distillation mainly adopts the form of one-time distillation, and tricyclene or other analogues are easily mixed in the camphene distillation process. With the development of the social market, camphene products are no longer just intermediates for the production of synthetic camphor, especially in the fields of spices, medicine, food, etc., there is a demand for high-quality camphene products with a camphene content of more ...

Claims

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Application Information

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IPC IPC(8): C07C5/27C07C7/04C07C13/40
CPCC07C5/2737C07C7/005C07C7/04C07C2529/40C07C13/40
Inventor 朱庆兵
Owner 怀集县长林化工有限责任公司
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