This invention provides a method for synthesizing glycolide using methyl glycolate as a raw material, comprising two steps as illustrated in the following reaction formulas:
wherein, the ROH represents a straight/branched chain alcohol, acid or ester containing 18-30 carbons and at least one hydroxyl group. The method for glycolide synthesis disclosed in the present invention manages to maintain a low viscosity within the reaction system by introducing a high-boiling alcohol into the reaction system to form a larger alkoxy glycolate exhibiting a significantly lower molecular weight compared to the typical glycolic acid oligomers utilized in the conventional process. Thus the challenges of coking and inefficient heat transfer encountered in traditional glycolide synthesis routes are effectively addressed.
This invention provides a method for synthesizing glycolide using methyl glycolate as a raw material, comprising two steps as illustrated in the following reaction formulas:
wherein, the ROH represents a straight/branched chain alcohol, acid or ester containing 18-30 carbons and at least one hydroxyl group. The method for glycolide synthesis disclosed in the present invention manages to maintain a low viscosity within the reaction system by introducing a high-boiling alcohol into the reaction system to form a larger alkoxy glycolate exhibiting a significantly lower molecular weight compared to the typical glycolic acid oligomers utilized in the conventional process. Thus the challenges of coking and inefficient heat transfer encountered in traditional glycolide synthesis routes are effectively addressed.
Lubricating composition containing an antiwear agent
申请人:The Lubrizol Corporation
公开号:EP2891700A1
公开(公告)日:2015-07-08
The invention provides a lubricating composition containing an oil of lubricating viscosity and a compound obtained/obtainable by a process comprising reacting a glycolic acid, a 2-halo-acetic acid, or a lactic acid, or an alkali or alkaline metal salts thereof, (typically glycolic acid or a 2-halo-acetic acid) with at least one member selected from the group consisting of an amine, an alcohol, and an aminoalcohol. The invention further relates to the use of the lubricating composition in an internal combustion engine.
Lubricating composition containing a corrosion inhibitor
申请人:The Lubrizol Corporation
公开号:EP2891701A1
公开(公告)日:2015-07-08
The invention provides a lubricating composition containing an oil of lubricating viscosity and a compound obtained/obtainable by a process comprising reacting a glycolic acid, a 2-halo-acetic acid, or a lactic acid, or an alkali or alkaline metal salts thereof, (typically glycolic acid or a 2-halo-acetic acid) with at least one member selected from the group consisting of an amine, an alcohol, and an aminoalcohol. The invention further relates to the use of the lubricating composition in an internal combustion engine.