TH179184A - Methods and equipment for producing lactide - Google Patents

Abstract

------ 15/11/2017 ------ (OCR) page 1 of number 1 page invention summary. The invention involved methods and equipment for producing lactide, hence the crude lactide, prepared by means of lactic acid oligomeric decolonization, was Purified by Distillation process According to the invention, the prepared raw lactide was preserved for a period of at least 5 h in the reaction vessel at a temperature of between 97 ํ and 200 ํ prior to the distillation process. During the time it was in the reaction vessel, a reduction in lactic acid content was reduced. And increasing the oligomer concentration of lactic acid, so the resulting crude lactide was More efficiently purified during subsequent distillation. The process of distillation before it is Good results added to the original ------------ page 1 of the number 1 page summary of invention The invention involves methods and equipment for producing lactide, hence the crude lactide, to be prepared by means of lactic acid oligomeric decolonization, Purified by Distillation process According to the invention, the prepared raw lactide was preserved for a period of at least 5 hours in the reaction vessel at temperatures between 97 ° and 200 ° prior to the distillation process. The lactide retention was retained during the period. In the reaction vessel, resulting in a reduction in lactic acid content. And increasing the oligomore concentration of lactic acid, so the resulting crude lactide was More efficiently purified during subsequent distillation. The process of distillation before it is Additional benefits

Claims (2)

: ------ 15/11/2017 ------ (OCR) page 1 of number 1 page invention summary The invention involved methods and equipment for producing lactide, hence the crude lactide, prepared by means of lactic acid oligomeric decolonization, was Purified by Distillation process According to the invention, the prepared raw lactide was preserved for a period of at least 5 h in the reaction vessel at a temperature of between 97 ํ and 200 ํ prior to the distillation process. During the time it was in the reaction vessel, a reduction in lactic acid content was reduced. And increasing the oligomer concentration of lactic acid, so the resulting crude lactide was More efficiently purified during subsequent distillation. The process of distillation before it is Good results added to the original ------------ page 1 of the number 1 page summary of invention The invention involves methods and equipment for producing lactide, hence the crude lactide, to be prepared by means of lactic acid oligomeric decolonization, Purified by Distillation process According to the invention, the prepared raw lactide was preserved for a period of at least 5 hours in the reaction vessel at temperatures between 97 ° and 200 ° prior to the distillation process. The lactide retention was retained during the period. In the reaction vessel, resulting in a reduction in lactic acid content. And increasing the oligomore concentration of lactic acid, so the resulting crude lactide was More efficiently purified during subsequent distillation. The process of distillation before it is Additional benefits, rights (item one) which will appear on the advertisement page: ------ 15/11/2017 ------ (OCR) page 1 of the number 2 pages. 1. a method for producing lactide, thereby raw lactide, was prepared by means of The oligomerization of lactic acid, purified by means of a distillation process, is characterized by that, before the refining process, the raw lactide was The preparations were maintained for a period of at least 5 h in the reaction vessel at temperatures between 97 ํ and 200 ํ. 2. Method according to claim 1, which is characterized by that lactide digtag: