Method for preparing improved plasticizer of citric palmitin

Abstract

The invention discloses a method for preparing an improved plasticizer of citric palmitin. The method comprises the following steps: heating citric acid monohydrate, alcohol, cetearyl alcohol and cyclohexane in reaction kettle to 160-250 DEG C, stirring until the materials are uniformly mixed; adding a catalyst into the reaction kettle, and pumping and filtering the generated reaction mixture in vacuum, and filtering the catalyst; and distilling at reduced pressure, neutralizing, rinsing, dehydrating and drying, decoloring and filtering. According to the method, the non-toxic and wide-sourced plant raw material, citric acid, and the cetearyl alcohol which cannot be volatized at normal temperature, can be easily stored and has no toxicity and large number of carbon atoms are adopted as reaction raw materials, the prepared plasticizer has the advantages of no toxicity, environmental friendliness, good plasticizing performance, migration resistance and low volatility, and the plasticizing efficiency of a traditional citric palmitin plasticizer can be improved.

Description

technical field [0001] The invention relates to a plasticizer, in particular to a citrate plasticizer. Background technique [0002] With the rapid development of the plastics industry and the textile printing and dyeing industry, the amount of plasticizers has increased significantly. Now the more commonly used plasticizers in the market are phthalates. In recent years, people have paid attention to health and carried out research on traditional phthalate plasticizers, and found that phthalates increase Plastics can pollute air, water, soil, and even food, and degrade very slowly in the environment, so they have become global environmental pollutants that have attracted much attention. In addition, in daily life, people are in direct contact with plastic products, and phthalate plasticizers will enter the human body through various channels and cause different degrees of harm. [0003] Citrate plasticizers are non-toxic and safe, and are one of the first-choice environmen...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by this invention is that the plasticizing efficiency of citric acid higher carbon alcohol ester plasticizer is low, and the purpose is to provide a kind of preparation method of the improved plasticizer of tripalmityl citrate, solve the problem of low plasticizing efficiency question