The present invention relates to novel succinic acid alkyl ester mixtures and to the use there as plasticizers for plastic materials. The claimed mixtures are characterised by having good plasticizing effects which lead the products produced with the mixtures to have improved application properties.
The present invention relates to novel succinic acid ester mixtures and to the use thereof as plasticizers for plastic materials. The claimed mixtures are characterized by having good plasticizing effects with low dissolution temperatures.
A reduced metallic catalyst or pre-activated catalyst is formed by contacting a precursor catalyst or a reduced metallic catalyst with a modifier solution in the presence of a source of hydrogen and heat treating the precursor catalyst or the reduced metallic catalyst at super-atmospheric pressure to obtain the reduced metallic catalyst from the precursor catalyst or the pre-activated catalyst from the reduced metallic catalyst. A method of hydrogenating a hydro genatable precursor includes providing a reduced metallic catalyst or the pre-activated catalyst prepared with modifier buffer and contacting the reduced metallic catalyst or pre- activated catalyst with the hydrogenatable precursor in the presence of hydrogen and, optionally, in the presence of a modifier solution.
A method of producing succinic acid (SA) includes providing fermentation derived diammonium succinate (DAS) containing solution, converting the DAS containing solution to a solution containing a half-acid, half-salt of succinic acid (MXS) by reactive evaporation, crystallizing MXS from the MXS containing solution by cooling and/or evaporative crystallization, converting MXS to SA by biopolar membrane electrodialysis, anion exchange, cation exchange, or a combination thereof, and crystallizing SA from SA the containing solution generated during conversion of the MXS to SA by cooling and/or evaporative crystallization.
B01D 3/34 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
6.
PROCESSES FOR THE PRODUCTION OF TETRAHYDROFURAN, GAMMA - BUTYROLACTONE AND/OR BUTANEDIOL FROM SALTS OF SUCCINIC ACID
A process for making a hydrogenated product includes providing a clarified DAS-containing fermentation broth, distilling the broth to form an overhead that includes water and ammonia, and a liquid bottoms that includes MAS, at least some DAS, and at least about 20 wt% water, cooling and/or evaporating the bottoms, and optionally adding an antisolvent to the bottoms, to attain a temperature and composition sufficient to cause the bottoms to separate into a DAS-containing liquid portion and a MAS-containing solid portion that is substantially free of DAS, separating the solid portion from the liquid portion, recovering the solid portion, hydrogenating the second solid portion in the presence of at least one hydrogenation catalyst to produce the hydrogenated product comprising at least one of THF, GBL or BDO, and recovering the hydrogenated product.
C07C 29/136 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen-containing functional group of C=O containing groups, e.g. —COOH
C07C 51/02 - Preparation of carboxylic acids or their salts, halides, or anhydrides from salts of carboxylic acids
C07C 51/41 - Preparation of salts of carboxylic acids by conversion of the acids or their salts into salts with the same carboxylic acid part
C07C 51/44 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation by distillation
A process for making a hydrogenated product includes providing a clarified DAS- containing fermentation broth; distilling the broth under super atmospheric pressure at a temperature of >100°C to about 300°C to form an overhead that includes water and ammonia, and a liquid bottoms that includes SA, and at least about 20 wt% water; cooling the bottoms to a temperature sufficient to cause the bottoms to separate into a liquid portion in contact with a solid portion that is substantially pure SA; separating the solid portion from the liquid portion; recovering the solid portion; hydrogenating the solid portion in the presence of at least one hydrogenation catalyst to produce the hydrogenated product including at least one of THF, GBL or BDO; and recovering the hydrogenated product.
C07C 29/136 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen-containing functional group of C=O containing groups, e.g. —COOH
C07C 51/02 - Preparation of carboxylic acids or their salts, halides, or anhydrides from salts of carboxylic acids
C07C 51/41 - Preparation of salts of carboxylic acids by conversion of the acids or their salts into salts with the same carboxylic acid part
C07C 51/44 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation by distillation
C07C 51/46 - SeparationPurificationStabilisationUse of additives by change of the physical state, e.g. crystallisation by distillation by azeotropic distillation
patents