EP 0207366 B1 19891206 - PROCESS FOR THE FILTRATION OF DRY-CLEANING BATHS AND FILTRATION AIDS IN THE FORM OF PREPARED LAYERED SILICATES USED THEREBY
Title (en)
PROCESS FOR THE FILTRATION OF DRY-CLEANING BATHS AND FILTRATION AIDS IN THE FORM OF PREPARED LAYERED SILICATES USED THEREBY
Publication
Application
Priority
DE 3522932 A 19850627
Abstract (en)
[origin: ES2000054A6] This invention relates to a process for the filtration of liquors containing organic solvents in dry cleaning using natural and/or synthetic layered silicates prepared with one or more ammonium compounds corresponding to the following general formula R1R2R3R4N+X-(I) wherein R1, R2, R3 and R4 represent hydrogen, alkyl or alkenyl groups which may optionally be substituted and X- represents anions of water-soluble, highly dissociated acids, in a quantity of from 2 to 60% by weight. Settling filters or cartridge filters are charged with the layered silicates thus prepared either alone or in combination with kieselguhr and/or active carbon, and solvent mixtures used in dry cleaning are filtered through the prepared filters. The invention also relates to filtration aids for use in the filtration of cleaning liquors from dry cleaning systems which are characterized in that they comprise natural and/or synthetic layered silicates prepared with quaternary ammonium compounds corresponding to general formula (I) above in a quantity of from 2 to 60% by weight, in combination with kieselguhr and/or active carbon.
IPC 1-7
IPC 8 full level
B01D 37/02 (2006.01); B01J 20/20 (2006.01); D06L 1/10 (2006.01)
CPC (source: EP US)
D06L 1/10 (2013.01 - EP US)
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
EP 0207366 A2 19870107; EP 0207366 A3 19870506; EP 0207366 B1 19891206; DE 3522932 A1 19870108; DE 3667309 D1 19900111; ES 2000054 A6 19871116; JP S626970 A 19870113; US 4774004 A 19880927
DOCDB simple family (application)
EP 86108285 A 19860618; DE 3522932 A 19850627; DE 3667309 T 19860618; ES 8600028 A 19860627; JP 15258886 A 19860627; US 87971386 A 19860627