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Method for synthesizing bornyl acetate from turpentine

A technology of bornyl acetate and turpentine, which is applied in the field of deep processing of turpentine, can solve the problems of low selectivity of bornyl acetate, complicated catalyst preparation, and high price, and achieve easy recycling, reduced polymer production, and low cost point effect

Active Publication Date: 2021-01-22
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As mentioned above, the existing main problem exists in the technology of directly synthesizing terpineyl acetate from turpentine oil: the one, the selectivity of target product bornyl acetate is not high ( Such as containing more terpineyl acetate, etc.); the second is that the catalyst used is complicated to prepare and expensive; the third is that the catalyst with better catalytic effect needs to use toxic and corrosive strong chloroacetic acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for synthesizing bornyl acetate from turpentine, comprising the following steps:

[0038] (1) Titanium sulfate and hydroxycarboxylic acid are first proportioned according to the mass ratio of 1:0.1, mixed uniformly to form a composite catalyst, and then turpentine (80%), acetic acid and the composite catalyst are mixed according to a mass ratio of 100:300:50 Add the proportion of the mixture into the reaction kettle, turn on the stirring, the stirring speed is 300rpm, heat and control the reaction temperature to 60°C, and the reaction time to 6h;

[0039] Wherein, the hydroxycarboxylic acid in the composite catalyst is glycolic acid.

[0040](2) After the reaction is finished, the product is filtered, and the filter cake is washed with ethanol to remove the residual product, and it is dried and reused at 100° C.; water with 200% of its quality is added to the filtrate, and the layers are left to stand, and the upper layer is containing bornyl acetate. The prod...

Embodiment 2

[0051] (1) Titanium sulfate and hydroxycarboxylic acid are first proportioned according to the mass ratio of 1:0.2, mixed uniformly to form a composite catalyst, and then turpentine (80%), acetic acid and the composite catalyst are mixed according to a mass ratio of 100:100:5 Add the proportion of the mixture into the reaction kettle, start stirring, the stirring speed is 400rpm, heat and control the reaction temperature to 55°C, and the reaction time to 20h;

[0052] Wherein, the hydroxycarboxylic acid in the composite catalyst is lactic acid.

[0053] (2) After the reaction is finished, the product is filtered, the filter cake is washed with ethanol to remove the residual product, and dried at 200°C for reuse; By-products such as pentene do not hinder the reuse of acetic acid; after most of the acetic acid is removed by simple distillation, the product containing bornyl acetate remains;

[0054] (3) The above-mentioned product containing bornyl acetate is added in a washing...

Embodiment 3

[0064] A method for synthesizing bornyl acetate from turpentine, comprising the following steps:

[0065] (1) Titanium sulfate and hydroxycarboxylic acid are first proportioned according to the mass ratio of 1:0.5, mixed uniformly to form a composite catalyst, and then turpentine (85%), acetic acid and the composite catalyst are mixed according to a mass ratio of 100:200:10 Add the proportion of the mixture into the reaction kettle, start stirring, the stirring speed is 500rpm, heat and control the reaction temperature to 60°C, and the reaction time to 5h;

[0066] Wherein, the hydroxycarboxylic acid in the composite catalyst is tartaric acid.

[0067] (2) After the reaction is finished, the product is filtered, and the filter cake is washed with ethanol to remove the residual product, and is dried and reused at 105° C.; water with 100% of its quality is added to the filtrate, and the layers are left to stand. The product, the lower layer is acid water, and the acid water is ...

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Abstract

The invention discloses a method for synthesizing bornyl acetate from turpentine, which relates to the technical field of deep processing of turpentine. The preparation method comprises the followingsteps of proportioning titanium sulfate and hydroxycarboxylic acid to form a composite catalyst, mixing turpentine, acetic acid and the composite catalyst, and reacting in a stirring state, after thereaction is finished, filtering, and removing acetic acid from the filtrate to obtain a solution containing bornyl acetate, neutralizing the solution containing the bornyl acetate, and washing with water to obtain a bornyl acetate crude product, and then fractionating the crude product of the bornyl acetate to obtain the bornyl acetate. The synthesis method provided by the invention is high in catalytic activity, low in cost and high in selectivity on the borneol acetate, and does not need to use a raw material with too high pinene content.

Description

technical field [0001] The invention relates to the technical field of turpentine deep processing, in particular to a method for synthesizing bornyl acetate from turpentine oil. Background technique [0002] Bornyl acetate, also known as bornyl acetate, includes isobornyl acetate and n-bornyl acetate. Main purposes: ① Used as a spice. Used in cosmetics, soaps and indoor disinfectants, indoor air fresheners, indoor spray essences, bath essences and talcum powder raw materials; often used to prepare fragrances such as fougere, lavender, cologne, Su Xinlan and forest type. IFRA has no restrictions. ② used as food spices. Bornyl acetate is recognized as GRAS by FEMA, FEMA No. 2159, and approved by the FDA for consumption. The Council of Europe has also included bornyl acetate in the list of artificial food flavors that can be used in food without endangering human health. Its maximum dosage 2mg / kg. It is an edible spice that is allowed to be used according to the provisions...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/14B01J31/38
CPCC07C67/08B01J31/38B01J31/04B01J27/02C07C2602/42B01J2231/49C07C69/14
Inventor 孟中磊周永红蒋剑春胡立红赵振东高守娜廖仲秋
Owner GUANGXI FORESTRY RES INST
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