摘要:
A new process for preparing calcium salts of 3-hydroxy-3-methylbutyric acid is described. Lactones obtained from ketene and acetone are hydrolyzed in selective and scalable manners. The 3-hydroxy-3-methylbutyric acid or its calcium salts are useful in preparations for inhibiting protein depletion or as immuno-stimulating feedstuff additives for mammals.
摘要:
The invention relates to aqueous dispersions for paper sizing containing sizing agent and one or more emulsifiers, the sizing agent having a molecular weight of
摘要:
A new process for preparing calcium salts of 3-hydroxy-3-methylbutyric acid is described. Lactones obtained from ketene and acetone are hydrolyzed in selective and scalable manners. The 3-hydroxy-3-methylbutyric acid or its calcium salts are useful in preparations for inhibiting protein depletion or as immuno-stimulating feedstuff additives for mammals.
摘要:
A process for the chlorination of alkylanilines is provided allowing a highly selective chlorination in the meta-position of the aromatic ring. This is achieved by reacting a mixture comprising the alkylaniline and sulfuric acid with chlorine. This process allows a meta-chlorination with a selectivity of more than 90%.
摘要:
The present invention relates to a paper sizing agent and emulsion comprising a maleated vegetable oil size wherein at least 50% by weight of the total fatty acids of the triglycerides are monounsaturated. The invention also relates to a process for the preparation of such maleated vegetable oil size.
摘要:
A new process for preparing calcium salts of 3-hydroxy-3-methylbutyric acid is described. Lactones obtained from ketene and acetone are hydrolyzed in selective and scalable manners. The 3-hydroxy-3-methylbutyric acid or its calcium salts are useful in preparations for inhibiting protein depletion or as immuno-stimulating feedstuff additives for mammals.
摘要:
The invention relates to aqueous dispersions for paper sizing containing sizing agent and one or more emulsifiers, the sizing agent having a molecular weight of 50 ) of less than 600 nm and 90 % of the sizing agent particles have a particle diameter (D 90 ) of less than 800 nm, the difference between D 90 and D 50 ranging from 50 nm to 500 nm. The invention also relates to a method for producing the dispersions.
摘要:
Beschrieben werden wässrige Papierleimungsemulsionen für die Masse- und Oberflächenleimung mit einem Gehalt an Fettsäureanhydriden, wobei die Fettsäureanhydride von ungesättigten oder gesättigten Fettsäuren oder deren Mischungen mit Kettenlängen von C 12 -C 24 abgeleitet sind und unter 50°C flüssig sind. Gegebenenfalls enthalten die Papierleimungsemulsionen zusätzlich ein weiteres reaktives oder nicht -reaktives Leimungsmittel und/oder ein aluminiumionenhaltiges Fixiermitel. Die neuen-Emulsionen eignen sich zur Ausrüstung von Papier und Karton.
摘要:
The invention relates to a composition for sizing paper, comprising alkenylsuccinic anhydride (ASA) as the sizing agent and an emulsifier system of anionic emulsifiers and nonionic components, wherein the anionic emulsifiers are chosen from alkali metal salts of aliphatic carboxylic acids or aliphatic dicarboxylic acids and the nonionic components are chosen from polyethylene glycols.