Method for method for synthesizing dihydromyrcenol from dihydro laurene using niobic acid catalyst

A technology of dihydromyrcenol and dihydromyrcene, which is applied in the field of synthesizing dihydromyrcenol from dimyrcene, can solve problems such as cumbersome post-processing procedures, increased maintenance costs, and corrosion of reaction equipment, and achieves easy separation and improved Compatibility, effect of avoiding contamination

Active Publication Date: 2009-02-04
俞忠华 +2
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Problems solved by technology

The synthesis of dihydromyrcenol generally adopts inorganic liquid acid catalysts such as sulfuric acid. The acid strength is high, the catalytic activity is high, and the reaction temperature is low. The reaction product must be neutralized and washed with water to remove the catalyst sulfuric acid. Pollution, and inorganic acids such as sulfuric acid severely corrode reaction equipment, increasing maintenance costs

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  • Method for method for synthesizing dihydromyrcenol from dihydro laurene using niobic acid catalyst

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Embodiment Construction

[0009] Specific implementation plan

[0010] With reference to the drawings, the process flow of the present invention is: dihydromyrcene uses niobic acid as a catalyst, adopts a composite solvent of water and polyol, undergoes hydration reaction, filtration, standing for stratification, and vacuum distillation to obtain dihydromyrcene alcohol , The catalyst niobic acid is recycled.

[0011] Embodiment 1 of the present invention: In the reactor, 20g of niobic acid catalyst treated with sulfuric acid, 200g of propylene glycol and water composite solvent (W / W: 1:1), and 180g of dihydromyrcene with a content of 82% are respectively added to the reactor to maintain The temperature was at 12°C, and the reaction was stirred for 7 hours. After the reaction is completed, filter, stand for layering, after the crude dihydromyrcenol is dried, dihydromyrcenol is obtained by distillation under reduced pressure, the conversion rate of dihydromyrcene is 83.6%, and the selectivity of dihydromyrce...

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Abstract

The invention relates to a method for synthesizing dihydrogen myrcene alcohol by using dihydrogen myrcene by adopting niobic acid catalyst, which comprises the following steps: niobic acid is used as catalyst; water and polyol are adopted as solvent, and the weight ratio of water and polyol is 1-2.3:1; the weight ratio of polyol complex solvent and dihydrogen myrcene is 1:1-2.5; under the low temperature condition, dihydrogen myrcene alcohol is obtained by the procedures of one-step hydration, filtration, standing and stratification, drying, reduced pressure distillation, etc.

Description

Technical field [0001] The invention relates to a method for synthesizing spices, in particular to a method for synthesizing dihydromyrcenol from dimyrcene by using a niobic acid catalyst. Background technique [0002] Dihydromyrcenol (chemical name: 2,6-dimethyl-7-octene-2-ol) has a strong fruity, floral, green, woody aroma, similar to white lemon, its aroma is in soap and Good stability in detergent. The synthesis of dihydromyrcenol generally uses inorganic liquid acid catalysts such as sulfuric acid. The acid strength is high, the catalytic activity is high, and the reaction temperature is low. The reaction product needs to be neutralized and hydrated to remove the catalyst sulfuric acid. The post-treatment process is cumbersome and causes environmental problems. Pollution, and sulfuric acid and other inorganic acids seriously corrode the reaction equipment, increasing maintenance costs. Summary of the invention [0003] The purpose of the present invention is to solve the de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/025C07C29/04B01J23/20
Inventor 俞忠华周振华郑井泉
Owner 俞忠华
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