Plasticizer and method for making same

Abstract

The present invention relates to the method for preparing the elasticizer which includes purifying the petroleum distillate and separating the extractive by the selective solvent, the extractive is treated by dimethylsulfoxide with weight ratio 1 :( 2.0-4.0) at the temperature ranging from 30 to 120 degree, and the gained raffinate is used as elasticizer. The extractive is the remaining extractive or the mixture of the remaining and the distilled extractive. The extractive is diluted by the alkane-cycloparaffin solvent with weight ratio 1: (0.1-0.5). The elasticizer includes the following components: the aromatic hydrocarbons with the weight percentage from 60 to 90, wherein the polycyclic aromatic hydrocarbon provided with three or more rings is 1.5 to 2.9 percentages by weight; the rest is alkane-cycloparaffin and resin.

Description

technical field

[0001] The invention relates to chemical industry or oil refining industry, and can be used in the preparation of oil plasticizers for synthetic rubber and tires. Background technique

[0002] Aromatic petroleum-plasticizers currently prepared from selectively processed extracts of petroleum fractions contain high levels of carcinogens, namely polycyclic aromatic hydrocarbons (PCAs) with three or more rings, especially benzo(a)pyrene ( Benz(a)-pyren). When tires containing said plasticizers are used, significant amounts of carcinogens, mutagens and toxic substances are released into the atmosphere. According to Directive 2005 / 69EU of the European Parliament and EUC of November 16, 2005, since January 1, 2010, according to method IP-346:1998, if the petroleum plasticizer contains more than 3.0% PCA, the Petroleum plasticizers cannot enter the market and be used in the manufacture of tires and their components.

[0003] According to IP-346: 1998, selectively...