Epoxy plant oil and preparation method thereof

Abstract

The invention relates to epoxy plant oil and a preparation method thereof. In the preparation method, the epoxy plant oil is synthesized by taking soybean oil, caster oil, rubber seed oil, palm oil, cotton seed oil, rap oil, corn oil and the like as raw materials, using mesoporous titanium-silicon molecular sieve as a catalyst and utilizing hydroperoxides for reaction, wherein the epoxy value of the epoxy plant oil is 3.1-6.3%, the iodine value of the epoxy plant oil is 3.0-18.1% and the acid value of the epoxy plant oil is 0.6-4.3 KOH mg / g. The reaction process is carried out in the presence of no carbosylic acid and no protonic acid, thereby generating no acid waste water and being friendly to environment.

Description

technical field [0001] The invention relates to an epoxy vegetable oil which can be used as a plasticizer in plastics and rubber and a preparation method thereof. Background technique [0002] Epoxy vegetable oil is mainly used as polyvinyl chloride plasticizer and stabilizer. It has good thermal and light stability, water resistance and oil resistance, and has good compatibility, low volatility and small migration. It has developed into the first Three types of plasticizers. Epoxy vegetable oil has very little toxicity, and can also be used as food and drug packaging materials, as additives for toys and home decoration materials, among which epoxy soybean oil has been approved by the US Food and Drug Administration as an epoxy resin that can be used in food packaging materials. class of plasticizers. [0003] At present, the preparation of epoxy vegetable oil mainly adopts a two-step method and a one-step method. The main process of the two-step method is that an organic ...

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation of epoxy vegetable oil mainly adopts a two-step method and a one-step method. The main process of the two-step method is that an organic acid (formic acid or acetic acid) reacts with hydrogen peroxide under the action of a catalyst to generate a peroxyacid epoxy oxidant, and then drips it The method of oxyacid epoxidation agent makes the vegetable oil undergo epoxidation reaction. After the reaction, it needs to undergo alkali washing, water washing, vacuum distillation and other treatment processes to finally obtain epoxy vegetable oil. This method is cumbersome; the one-step method is The epoxidation of vegetable oil can be realized at the same time as the oxyacid, and the direct generation of peroxyacid and the synthesis of downstream products are integrated into one reactor. This method has short production process, simple operation, low cost, and eliminates the need to use peroxyacid. has become the main method in industrial production, but there are still many deficiencies

Most of the catalysts used in these two methods are concentrated sulfuric acid and organic acids, etc., which are easy to corrode equipment, and the resulting products have darker colors, easy to produce by-products, low epoxy value, and poor thermal stability.

Moreover, there is also the problem that the reaction solution and the catalyst are in the same phase and are not easy to separate, and the resulting epoxy group is easy to open the ring.

In addition, using strongly acidic cation exchange resin as a catalyst to prepare epoxy vegetable oil can avoid the shortcomings of catalytic preparation of epoxy vegetable oil, but the ion exchange resin must be strictly pretreated before the reaction, the operation is complicated, and the epoxidation time is long, and the energy consumption is high. Big, high cost;