Method for synthesis of terpineol by supersonic wave assistance

A technology of ultrasonic wave and terpineol, applied in the field of ultrasonic-assisted synthesis of terpineol, can solve the problems of low yield of terpineol, poor purity and aroma, short production cycle, etc., and achieves enhanced neutralization and washing efficiency, stable aroma, The effect of improving product yield

Active Publication Date: 2012-08-08
云南森美达生物科技股份有限公司
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Problems solved by technology

At present, the production of terpineol is mainly divided into two processes: one-step method and two-step method. The one-step method is that turpentine oil is directly hydrated into terpineol under the action of an acidic catalyst. The production cycle of this method is short, but the yield of terpineol is low. There are many by-products, poor purity and aroma, and the product is mainly used as No. 2 miner

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  • Method for synthesis of terpineol by supersonic wave assistance
  • Method for synthesis of terpineol by supersonic wave assistance

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Embodiment Construction

[0017] The specific embodiment of the present invention is further illustrated by the following steps:

[0018] 1. Fractionation of turpentine oil, 95% of α-pinene and β-pinene can be obtained after turpentine oil fractionation.

[0019] 2. Hydration

[0020] (1) The feeding ratio (weight ratio) is pinene: 30% sulfuric acid = 1:1.7.

[0021] (2) In the 5M equipped with stirring device 3 In the enamel reaction pot, first add 30% sulfuric acid, then add turpentine and emulsifier Pingping plus Pergal, the amount added is 1000kg turpentine plus 400ml 10% Pingping. After the addition is complete, stir vigorously to make the reactant completely become an emulsion. During the reaction, pass through cold brine to keep the temperature at 28-30°C for 24 hours. A large amount of hydrated terpene diol crystals are precipitated,

[0022] (3) Static stratification. The hydrated terpene diol crystals float on the acid water, and the lower layer of acid water is removed and reused.

[...

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Abstract

The invention discloses a method for synthesis of terpineol by supersonic wave assistance. The method is characterized in that through a two-step technology, hydration, dehydration and neutralization are carried out under supersonic wave assistance. Through preferable selection of appropriate supersonic wave parameters and utilization of cavitation of supersonic waves, reinforcement emulsification effects are improved; reaction rates and selectivity of hydration and dehydration are improved; efficiency of neutralization washing is reinforced; and the consumption of washing water is reduced.

Description

technical field [0001] The invention relates to a method for ultrasonic-assisted synthesis of terpineol. Background technique [0002] my country is rich in turpentine resources, and the annual output of turpentine oil is huge. One of its biggest uses is the production of spice-grade terpineol. Terpineol, also known as terpineol, is divided into spice-grade terpineol and pharmaceutical-grade terpineol. It is a colorless Viscous liquid. Terpineol has a long-lasting lilac aroma and smells of trees and flowers, and is widely used in spices, printing, daily chemicals, pesticides, mineral processing and other industries. At present, the production of terpineol is mainly divided into two processes: one-step method and two-step method. The one-step method is that turpentine oil is directly hydrated into terpineol under the action of an acidic catalyst. The production cycle of this method is short, but the yield of terpineol is low. There are many by-products, poor purity and aroma...

Claims

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Application Information

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IPC IPC(8): C07C33/14C07C29/60
Inventor 陈国强
Owner 云南森美达生物科技股份有限公司
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