Separation and purification of pigment suspensions and suspensio

Details Separation and purification of pigment suspensions and suspensio Separation and purification of pigment suspensions and suspensio

1987-09-30

1989-03-07

Fisher, Richard V.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210772, 210797, 106493, A63H 1300

Patent

active

048103900

ABSTRACT:
Process for separation and purifying pigment suspensions and suspensions of pigment intermediates in a liquid by means of a membrane separation process, whereby the suspension to be treated is uniformly fed to and circulated through a microfiltration unit containing at least one semi-permeable membrane and the separated liquid flows off through the membrane as permeate which process comprises replacing the permeate gradually by a washing liquid that differs from the first liquid such that the total amount of washing liquid fed into the system is 1 to 15 times the total volume of the initial suspension, and separating the resultant suspension from the liquid by means of conventional filtration or drying apparatus. The process is particularly suitable for processing fine pigment suspensions often obtained in pigment synthesis.

REFERENCES:
patent: 3528365 (1970-09-01), List
patent: 3567675 (1971-03-01), Merck
patent: 3977967 (1976-08-01), Trulson et al.
patent: 4069157 (1978-01-01), Hoover et al.
patent: 4088577 (1978-05-01), Muller
patent: 4329145 (1982-05-01), Koll et al.
patent: 4385903 (1983-05-01), Moriyama et al.
patent: 4579949 (1986-04-01), Rochat et al.
patent: 4619770 (1986-10-01), Boston

Affiliated with

Also associated with

Rating

Separation and purification of pigment suspensions and suspensio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Separation and purification of pigment suspensions and suspensio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Separation and purification of pigment suspensions and suspensio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1666687