EP 0172541 B1 19890524 - PROCESS FOR CONTROLLING THE ELECTROLYTE CONTENT OF AQUEOUS RESIN DISPERSIONS
Title (en)
PROCESS FOR CONTROLLING THE ELECTROLYTE CONTENT OF AQUEOUS RESIN DISPERSIONS
Publication
Application
Priority
DE 3431276 A 19840825
Abstract (en)
[origin: ES8605008A1] In controlling the electrolyte content of aq. resin dispersions by membrane filtration, opt. continuously, and with inclusion of known measuring, control and/or metering instruments, (a) semipermeable filter modules with average pore width less than the average micelle size of the organic components of the dispersion, inner dia. of 0.05-1.0 cm and length of the filter module of 0.1-10m/10 l of bath vol., are contacted with the dispersions, (b) water is passed through the filter module and is led in a separate closed cycle; a hydrostatic pressure of 40-500 mbars is exerted on the outer membrane surface, turned towards the dispersion, by sucking or pumping the water, (c) water and foreign ions to be removed are withdrawn from the dispersion and are conc. in the aq. circulating phase, and (d) the loss of water and desired electrolytes in the aq. resin dispersion are compensated by addn. of each component.
[origin: ES8605008A1] In controlling the electrolyte content of aq. resin dispersions by membrane filtration, opt. continuously, and with inclusion of known measuring, control and/or metering instruments, (a) semipermeable filter modules with average pore width less than the average micelle size of the organic components of the dispersion, inner dia. of 0.05-1.0 cm and length of the filter module of 0.1-10m/10 l of bath vol., are contacted with the dispersions, (b) water is passed through the filter module and is led in a separate closed cycle a hydrostatic pressure of 40-500 mbars is exerted on the outer membrane surface, turned towards the dispersion, by sucking or pumping the water, (c) water and foreign ions to be removed are withdrawn from the dispersion and are conc. in the aq. circulating phase, and (d) the loss of water and desired electrolytes in the aq. resin dispersion are compensated by addn. of each component.
IPC 1-7
IPC 8 full level
C08J 3/02 (2006.01); B01D 61/14 (2006.01); B01D 61/18 (2006.01); B01D 61/22 (2006.01); B01D 65/02 (2006.01); B01D 65/08 (2006.01); C25D 13/06 (2006.01); C25D 13/24 (2006.01)
CPC (source: EP US)
C25D 13/24 (2013.01 - EP US)
Citation (examination)
Ullmanns Encyklopädie der technischen Chemie, 4. Auflage (1978), S. 515, 516, 528-531
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0172541 A1 19860226; EP 0172541 B1 19890524; AT E43369 T1 19890615; AU 4659885 A 19860227; AU 571106 B2 19880331; BR 8504040 A 19860610; CA 1240272 A 19880809; DE 3431276 A1 19860306; DE 3570462 D1 19890629; ES 546389 A0 19860301; ES 8605008 A1 19860301; JP S6169837 A 19860410; MX 168157 B 19930506; US 4639319 A 19870127; ZA 856438 B 19860430
DOCDB simple family (application)
EP 85110298 A 19850817; AT 85110298 T 19850817; AU 4659885 A 19850823; BR 8504040 A 19850823; CA 488285 A 19850808; DE 3431276 A 19840825; DE 3570462 T 19850817; ES 546389 A 19850823; JP 18651785 A 19850823; MX 20640885 A 19850823; US 75759785 A 19850722; ZA 856438 A 19850823