Synthesis method of thio-menthone perfume

Abstract

The invention relates to a synthesis method of thio-menthone perfume, which comprises the steps of: preparation of chloro-menthone, preparation of sodium hydrosulfide, preparation of crude thio-menthone, rectification of the crude thio-menthone and the like. Compared with the prior art, the method is convenient for industrial implementation, less in equipment investment and easy in operation; the technique has highest yield in the preparation of the thio-menthone under the technical condition of normal pressure and normal temperature; meanwhile, the method solves the problems of high equipment investment, strong equipment corrosion, high power consumption, hard operation and the like caused by the technology for preparing the thio-menthone at high pressure and low temperature.

Description

【Technical field】 [0001] The invention belongs to the technical field of spices, and more specifically, the invention relates to a method for synthesizing thiomenthone spices. 【Background technique】 [0002] The chemical name of thiomenthone (1) is 2-(1-mercapto-1-methylethyl)-5-methylcyclohexanone (2-(1-mercapto-1-methylethyl)-5-methyl- cyclohexanone), as represented by the following formula (1). It is one of the important fragrance raw materials in the fragrance industry. Its smell in its pure state is not pleasant, but once diluted, it has a strong fruity, green, toasty aroma, slightly warm and sweet, even minty, It plays an important role in the preparation of blackcurrant, peach, vegetable and other food flavors. Thiomenthone is also widely used in the preparation of toothpaste flavor and characteristic aroma of daily chemical products. The trace application of thiomenthone in tobacco flavors can enhance the flavors of green, sweet and fruity. The FEMA number for T...

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Problems solved by technology

However, this method is difficult to implement in industry, and there are many problems, such as: 1, it must need large, medium-sized steel pressure vessel equipment, and the equipment investment is large; 2, the H in the process 2 S is very corrosive to steel equipment, and the maintenance and depreciation costs of equipment are high; 3. The process requires the reaction temperature to reach -80°C, which requires a lot of energy consumption; 4. The internal temperature of large and medium-sized pressure vessels must reach -80°C , it is also difficult in design, which will increase the manufacturing cost and operation difficulty of the equipment

The literature (Flavour & Fragrance J., 1993, Vol.8 (5), 289-294) has reported that, for example, use aluminum trichloride Lowis acid to induce, which is conducive to H 2 Electrophilic addition of S, but only 9% yield of thiomenthone

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