PROCEDIMIENTO PARA LA FABRICACION DE ALDEHIDOS

• Main Authors: BACH, HANSWILHELM, CORNILS, BOY, KONKOL, WERNER, GICK, WILHELM, HAHN, HEINZ-DIETER, WIEBUS, ERNST
• Format: Patent
• Language: Spanish
• Published: 16.10.1992
• Edition: 4
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

EL INVENTO SE TRATA DE UN PROCEDIMIENTO PARA LA FABRICACION DE ALDEHIDOS A TRAVES DE LA REDUCCION QUIMICA DE DEFINAS CON MONOXIDO DE CARBONO E HIDROGENO EN LA PRESENCIA DE UNA DISOLUCION ACUOSA COMO CATALIZADOR, QUE CONTIENE SODIO Y TRIAXILFOSFINA FORMADO, COMPLEJO, SULFONADO Y CARBOXILIADO. PARA LA MANTENCION DE LA CONCENTRACION ORIGINAL DE FOSFINA MIENTRAS SE INTRODUCE UNA DISOLUCION NUEVA DE FOSFINA, HASTA CUANDO LA CONCENTRACION TOTAL ESTE DE EN FOSFINAS FORMADAS, COMPLEJOS Y PRODUCTOS DE SUCESION Y DE EXTRACCION DE FOSFINA APROXIMADAMENTE 35 A 45% DE PESO NO HABILES PARA LA FORMACION DEL COMPLEJO, REFIRIENDOSE A LA DISOLUCION ACUOSA. In a hydroformylation process for the preparation of aldehydes by reacting aliphatic olefins of 2 to 12 carbon atoms with carbon monoxide and hydrogen at temperatures of 20 DEG to 150 DEG C. and pressures of 0.1 to 20 mPa in the liquid phase and in the presence of an aqueous solution of a catalyst containing originally 50 to 800 wt. ppm of rhodium and 25 to 30 wt. % of complex-forming, sulfonated or carboxylated triarylphosphines, in each case based on the aqueous solution, the improvement comprising adding fresh phosphine solution to maintain the original phosphine concentration, until the total concentration of complex-forming phosphines and secondary and degradation products of the phosphines not capable of forming complexes amounts to about 35 to 45 wt. % based on the aqueous solution to selectively form n-aldehydes.