NEW PROCEDURE FOR PRODUCTION OF REGRANULATES FROM POLYVINYL CHLORIDE (PVC) AND DIOCTYL TEREPHTHALATE FOR APPLICATION IN CIVIL ENGINEERING, INDUSTRY AND FOR MANUFACTURE OF OBJECTS FOR GENERAL USE

摘要

Invention herewith described refers to the new procedure for the production of regranulates from polyvinyl chloride (PVC) and dioctyl terephthalate for the application in the civil engineering, industry and for the manufacture of objects for general use. The new procedure for production of polyvinyl chloride (PVC) regranulates from polyvinyl chloride (PVC), waste or commercial, and plasticizers synthesized from the waste polyethylene terephthalate (PET), di-(2-ethylhexyl) terephthalate (DOTP) and dichlorinated alkyl terephthalate, shown in Flow sheet 1, begins so that in the reactor - position 1, Flow sheet 1, in the reaction for obtaining di-(2-ethylhexyl) terephthalate (DOTP) or di (alkyl chlorinated) terephthalate, the compound of general formula (I), where R can be 2-ethylhexyl or chlorinated higher fatty alcohols derived from fatty acids of the linseed oil, according to the present invention the waste polyethylene terephthalate (PET), the compound of formula (II),after purification and fragmentation is mixed with alcohol, the compound of general formula (III),where R can be 2-ethylhexyl or chlorinated higher fatty alcohols derived from fatty acids of the linseed oil, whereby with the reaction, with which there are obtained di-(2-ethylhexyl) terephthalate (DOTP) and di(chlorinated alkyl) terephthalates, typically performed in a temperature range from 150° to 250° C, at molar ratio of polyethylene terephthalate (PET) and 1,0:2,0 to 1,0:10,0 of alcohol with or without the use of azeotroping agent for the removal of the reaction water, at the pressure in the reaction vessel from 1.0 to 50.0 bar with or without the presence of a catalyst, and the time necessary to obtain a high conversion degree that can vary from 6 to 24 hours.