- Preparation method of dicarboxylic isosorbide
-
The invention provides a preparation method of a dicarboxylic isosorbide. According to the preparation method, sorbitol is taken as a raw material, 0.5 to 48h of dehydration is carried out in the presence of a dehydration catalyst at N2 atmosphere at 100 to 180 DEG C, a monoprotic acid and an esterification catalyst are added, reaction temperature is increased to 185 to 250 DEG C for 0.5 to 48h of esterification, and reduced pressure distillation is carried out so as to obtain the dicarboxylic isosorbide product. The dicarboxylic isosorbide is a novel biomass-based plasticizer, can be used for replacing phthalic acid ester in production of polyvinyl chloride products such as agricultural plastic mulching film. Product yield of the preparation method is high; production separation is convenient; the preparation method is friendly to the environment; and application prospect is promising.
- -
-
-
- Preparation method of dicarboxylic acid isosorbide ester plasticizer
-
The invention provides a preparation method of a dicarboxylic acid isosorbide ester plasticizer. According to the method, isosorbide and monobasic acid serve as raw materials, and an esterification reaction is carried out for 0.5-48 h at the temperature of 65-250 DEG C under the catalytic effect. Dicarboxylic acid isosorbide ester is obtained through reduced pressure distillation. Dicarboxylic acid isosorbide ester is a non-toxic plasticizer, and can replace phthalic acid ester to be used for production of electric wire and cable sheaths, agricultural plastic mulching films and other polyvinyl chloride products. The product prepared through the method is high in yield, easy to separate and environmentally friendly, and has good application prospects.
- -
-
Paragraph 0027
(2017/05/13)
-
- AN IMPROVED GLYCOL ACYLATION PROCESS
-
A method for acid-catalyzed acylation of an isohexide is described. The method can enable direct alcohol acylation with carboxylic acids. In particular, the method involves reacting an isohexide and an excess of carboxylic acid, in the presence of a water-tolerant Lewis acid catalyst. Water-tolerant Lewis aid catalysts can furnish relatively high diester yields (e.g., ≥ 55%-60%) at lower catalyst loads. This feature, among others, is highly desirable for cost savings, and can improve process economics.
- -
-
Page/Page column 9; 10
(2015/07/07)
-
- Mixture of diesters of dianhydrohexitol derivatives with carboxylic acids of the empirical formula C8H17COOH, process for preparing these diesters, and use of these mixtures
-
The present invention relates to a mixture comprising diesters of the formula (I) where R1 to R8═H or alkyl group having from 1 to 6 carbon atoms, where the R1 to R8 radicals may be the same or different, which is characterized in that at least two different diesters I are present in the mixture, said diesters differing in the structure of at least one of the carboxylic acid radicals C8H17COO present, to a process for preparing diesters of an isosorbide derivative of the formula I, in which a hexahydric alcohol and/or a monoanhydro or dianhydro derivative of the alcohol is esterified with a mixture of at least two different carboxylic acids of the empirical formula C8H17COOH, and to the use of these mixtures in paints, inks or coatings, in plastisols, adhesives or adhesive components, in sealants, as plasticizers in polymers or polymer components, as solvents, as lubricant oil components and as assistants in metal processing, and also PVC compositions or plastisols comprising PVC and from 5 to 250 parts by mass of the mixture per 100 parts by mass of PVC.
- -
-
Page/Page column 19-20
(2012/09/11)
-