Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1997-03-04
1999-10-12
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210656, 435144, 562580, 562584, B01D 6114, C07C 5142
Patent
active
059650281
ABSTRACT:
A process for treating a liquid comprising subjecting a liquid containing, in solution, citric acid as well as a less desirable component having a similar molecular weight to citric acid, to nanofiltration in a filtration step. From the filtration step, a permeate in which the ratio of the concentration of the citric acid to that of the less desirable component is greater than the ratio of the concentration of the citric acid to that of the less desirable component in the solution, is obtained.
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Raman, L.P. et al., "Consider Nanofiltration for Membrane Separations," (Mar. 1994) Chem. Engineering Progress, pp. 68-74.
Lesniak, W., "A Modified Method of Citric Acid Production," Chemistry, (1989) Polish Technical Review, pp. 17-19.
Grond Sanet
Hendricks Fadl
Raman Lakshminarayanan Pattabiraman
Verhoff Francis H.
Reilly Industries Inc.
Therkorn Ernest G.
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