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Process for producing borneol by adopting alpha-pinene

A technology of borneol and pinene, which is applied in the technical field of producing borneol from α-pinene, can solve the problems of difficult control of temperature control requirements, violent reaction heat release, fire, etc., to avoid the explosion factor of punching materials, high purity, and dangerous Reduced effect

Active Publication Date: 2014-01-01
YUNNAN LINYUAN SPICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current domestic production process of using boric anhydride as a catalyst to synthesize borneol obviously has many shortcomings. For example, the long esterification time needs 15 hours, the reaction is violently exothermic, and the temperature control requirements are extremely strict and difficult to control. Once out of control, improper handling is easy to cause fire, explosion

Method used

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  • Process for producing borneol by adopting alpha-pinene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 Shown, the technique of producing borneol with α-pinene adopts the following steps to carry out:

[0030] ① Esterification: Put α-pinene into the esterification reaction kettle, start stirring, add anhydrous oxalic acid 0.2 times the mass of α-pinene under stirring, after adding anhydrous oxalic acid, add α-pinene For the catalyst with a mass of 0.03 times, after the esterification reaction is completed, the cooling circulating water is turned on to lower the temperature in the kettle to below 70°C, the esterification reaction kettle is kept in a stirring state, and the reaction solution is transported to the water washing pot through the pipeline for washing. The catalyst is metatitanic acid.

[0031] ②Water washing: add waste acid water to the water washing pot containing the esterification reaction liquid, the amount of waste acid water added is 1.5-2 times the weight of the reaction liquid; first pass steam to heat the liquid in the pot to 88-90 °C, ...

Embodiment 2

[0048] like figure 1 Shown, the technique of producing borneol with α-pinene adopts the following steps to carry out:

[0049] ①Esterification: Put α-pinene into the esterification reaction kettle, start stirring, add anhydrous oxalic acid 0.1 times the mass of α-pinene under stirring, after adding anhydrous oxalic acid, add α-pinene For the catalyst with a mass of 0.02 times, after the esterification reaction is completed, the cooling circulating water is turned on to lower the temperature in the kettle to below 70°C, the esterification reaction kettle is kept in a stirring state, and the reaction solution is transported to the water washing pot through the pipeline for washing.

[0050] The catalyst is metatitanic acid, which is prepared by the following method: a. Mix the titanium white slurry with water, add NaOH solution with a concentration of 30%, and adjust the pH value to 8-9; then add water and wash repeatedly 2-5 times , during which the pH value is maintained at ...

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Abstract

The invention relates to borneol production process, in particular to a process for producing borneol by adopting alpha-pinene. The process comprises the following steps: (1) esterification; (2) washing; (3) light oil distilling; (4) saponification; (5) cooling; (6) centrifugal crushing; (7) coarse crystallization; (8) fine crystallization; (9) drying. According to the process, a green catalysis method is adopted to produce the borneol, the borneol production cycle is short, the production danger coefficient is small, the pollution level is low, and the quality of the product is high.

Description

technical field [0001] The invention relates to a borneol production process, in particular to a process for producing borneol with α-pinene. Background technique [0002] Borneol, also known as sliced ​​brain, orange slice, dipterocarp, plum blossom borneol, jiebuluoxiang, plum blossom brain, borneol, plum ice, etc., is the crystallization obtained by extracting the resin and volatile oil processed products of dipterocarp plant Dipterocarpa , is almost pure D-borneol. It can also be synthesized by chemical methods. It can be used for blindness due to closed syndrome, red eyes, swelling and pain, sore throat and mouth sores, swelling and pain of sores, non-constriction after ulceration, etc. Ice flakes are divided into natural ice flakes and machine-made ice flakes. Machine-made ice flakes are processed products synthesized by chemical methods. It is translucent flake crystal, with a diameter of 5-15 mm and a thickness of about 2-3 mm. White, with cracks like ice on the ...

Claims

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Application Information

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IPC IPC(8): C07C35/30C07C27/02
CPCC07C29/095C07C29/78C07C67/04C07C35/30C07C69/36
Inventor 张黎伟曾类文张黎明普国文张文俊
Owner YUNNAN LINYUAN SPICES
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