SOLUTIONS AQUEUSES ACIDES EPAISSIES ET LEUR APPLICATION NOTAMMENT POUR LE DETARTRAGE

• Main Author: DANIEL SIEGEL ET MICHEL SOREAU
• Format: Patent
• Language: French
• Published: 13.08.1982
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

L'INVENTION CONCERNE, DANS LE DOMAINE DU DETARTRAGE, DES SOLUTIONS AQUEUSES ACIDES EPAISSIES, DE CONCENTRATION PONDERALE EN ACIDE(S) INFERIEURE OU EGALE A 30, DE PH INFERIEUR OU EGAL A 2, PRESENTANT UNE VISCOSITE SUPERIEURE A 1 CENTIPOISE DETERMINEE A 20C AVEC UN VISCOSIMETRE DE BROOKFIELD, MODELE RVT, EQUIPE D'UN AXE CONVENABLE TOURNANT A LA VITESSE DE 50 TOURS PAR MINUTE, STABLES DANS LE TEMPS, CARACTERISEES PAR LE FAIT QU'ELLES SONT EPAISSIES PAR L'HOMOPOLYMERE DU METHACRYLATE DE DIMETHYLAMINOETHYLE SALIFIE PAR L'ACIDE CHLORHYDRIQUE. 1. Thickened aqueous acid solutions having an acid concentration by weight lower than, or equal to, 30%, a pH lower than, or equal to 2, and presenting a viscosity higher than 1 millipascal per second as determined at 20 degrees C with a Brookfield viscosimeter, model RVT, equipped with a suitable shaft rotating at the speed of 50 rotations per minute, stable in time, characterised in that they are thickened by the hydrochloric acid salified dimethylaminoethyl methacrylate homopolymer having an intrinsic viscosity of between 4 and 6 dl/g, as determined in a NaCl molar solution at 20 degrees C.