Method for preparing novel environmentally-friendly plasticizer

Abstract

The invention discloses a method for preparing a novel environmentally-friendly plasticizer, which comprises the following steps of: adding glycerol, benzoic acid and xylene into a reactor, performing reaction under 70 to 180 DEG C and 0.1 to 0.6 MPa to prepare a semi-finished product, treating the semi-finished product by using a falling film evaporator, adding a solid acid catalyst to continuously perform the reaction, and finally adding activated carbon for absorptive filtration to obtain a liquid benzoate glycerol ester plasticizer finished product. The method ensures less investment, low energy consumption, low production cost and high market competitiveness of the product, is favorable for safety production and environmental protection, shortens a production process flow and reaction time due to the adoption of raw materials with low cost instead of downstream petrochemical raw materials phthalate, terephthalic acids and octanol, and meets the advocacy of promoting the development of enterprises by scientific and technical innovations in China.

Description

technical field [0001] The present invention relates to the field of fine chemical products in the chemical industry. It is mainly aimed at the technical route of ordinary plasticizer products on the market at present, and provides a new production process after technological innovation. Specifically, it is a new type of environmentally friendly plasticizer. Preparation. Background technique [0002] At present, plasticizer is one of the plasticizer additives with the largest consumption in domestic and foreign markets. In recent years, my country has become the country with the largest plasticizer production capacity and the largest demand in the world. For a long time, some domestic manufacturers generally use o-xylene as the main raw material for the production of plasticizers. It has also attracted more and more attention, and has also attracted the attention of health organizations around the world, and has taken corresponding restrictive measures. Countries such as ...

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Problems solved by technology

[0003] At present, the production process of plasticizers on the market mainly includes two process formulas of phthalic acid and terephthalic acid. Although the product quality of plasticizers produced with phthalic acid and terephthalic acid And the situation of user feedback is good, but these production processes have high energy consumption, especially the waste gas generated during the acidification reaction seriously affects the surrounding environment, and also affects the physical and mental health of operators. At the same time, due to the above production processes The steam pressure required for the distillation dealcoholization and esterification reaction should be above 10kg, and the temperature should be around 260 degrees Celsius, which not only increases the difficulty of safety production management, but also promotes the easy damage of production equipment, which brings the production and operation costs of enterprises. High, low competitiveness situation