Solid-state cardanol and preparation thereof

Abstract

The invention provides solid cardanol. The component of the solid cardanol is cardanol of which the side chain is saturated. The preparation method for the solid cardanol comprises the following steps: putting the cardanol or cashew nut oil into an autoclave, adding catalyst into the autoclave, firstly introducing a protective gas to exhaust air in the autoclave, then introducing hydrogen, and stirring for reaction for 3 to 6 hours at a temperature of between 100 and 200 DEG C and atmospheric pressure of between 1 and 5 MPa; and after the reaction is finished, collecting the product, then decompressing and distilling the product, and cooling the distillate to obtain the solid cardanol. The solid cardanol has the following advantages that the side chain of the solid cardanol is saturated, so the side chain does not generate self-gathering during fine purification at high temperature or high temperature treatment process for synthesizing other products; the solid cardanol is not easily oxidized nor lost by self-gathering during storage and transportation; and the solid cardanol does not generate self-gathering during fine purification of decompression and distillation, so the yield of the solid cardanol is improved.

Description

technical field [0001] The invention relates to a kind of cardanol, in particular to a kind of solid cardanol which does not undergo self-polymerization, and also relates to a preparation method of the solid cardanol. Background technique [0002] The cashew nut tree is a tropical economic crop. The color, fragrance and taste of the kernel are excellent, and the nutrition is particularly rich. Its shell contains a viscous liquid, which is cashew nut oil (cashew nut shell liquid), the main ingredient in cashew nut oil. The ingredient is cardanol, which is a light yellow liquid. It is a renewable natural phenolic compound with great potential application prospects. It can replace a variety of phenolic fine petrochemical raw materials in chemical synthesis. Its unique properties make it a It is one of the most promising materials to solve high-end chemical building materials, vehicles, ships, aerospace, electronic chemical materials and other fields in the future. It is also th...

AI Technical Summary

Problems solved by technology

[0008] However, cardanol has some defects when it is used. It is prone to be oxidized during storage and transportation. Generally, antioxidants need to be added, but it is still easy to deteriorate; and it is easy to self-polymerize when cardanol is processed at high temperature, such as In the high-temperature rectification method used in the cardanol refining process, part of the cardanol self-polymerizes, and the polymer produced by the self-polymerization cannot be evaporated. The result is mainly cardanol with a low number of side chain double bonds.

Therefore, the distillation yield can only be maintained at about 46%, which is much lower than the theoretical 90%.

In addition, cardanol is very easy to self-shrink in the process of synthesizing other products, and the self-shrinking product is insoluble in water, but it is soluble in benzene, ketone, petroleum ether, alcohol and oily materials like the material synthesized by condensation, and it is difficult to separate. The reason for the failure is the low yield, and now very few companies at home and abroad have made breakthroughs in this area

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