Purification of phosphoric acid solutions by reverse osmosis and nanofiltration

Purification of phosphoric acid by reverse osmosis (RO) and nanofiltration (NF) was studied using different commercial membranes of common industrial use. Both techniques represent an interesting alternative in purifying industrial phosphoric acid solutions. RO is a good choice to purify solutions u...

Full description

Saved in:
Bibliographic Details
Published in:Desalination 2002-09, Vol.147 (1), p.315-320
Main Authors: González, M.P., Navarro, R., Saucedo, I., Avila, M., Revilla, J., Bouchard, Ch
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Chemical industry and chemicals
Exact sciences and technology
Industrial chemicals
Inorganic industry
Membrane separation (reverse osmosis, dialysis...)
Nanofiltration
Phosphoric acid purification
Reverse Osmosis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Purification of phosphoric acid by reverse osmosis (RO) and nanofiltration (NF) was studied using different commercial membranes of common industrial use. Both techniques represent an interesting alternative in purifying industrial phosphoric acid solutions. RO is a good choice to purify solutions up to a concentration of 2 M. Among the RO membranes, SX01 (Osmonics) yields the best global performance: permeate flux of 13.5 L/m 2h, at 1800 psi, 46.3% of acid permeation and 99.3% of global rejection of cationic impurities. The performance of membrane was better by applying a simple pretreatment with a solution of phosphoric acid/ethanol/water. However, NF is a better alternative since it can yield good results at concentrations up to 8 M. The DS5DL (Osmonics) is the NF membrane with the best global performance: permeate flux of 3.02 L/m 2h at 1000 psi, 94.2% of acid permeation and 99.2% of cationic impurities rejection.
ISSN:0011-9164
1873-4464
DOI:10.1016/S0011-9164(02)00558-1