Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1977-12-12
1980-04-29
Langel, Wayne A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
C01B 2516
Patent
active
042006201
ABSTRACT:
Wet-processed phosphoric acid is decontaminated. To this end, the phosphoric acid and an organic solvent, which is partially miscible with water and capable of absorbing phosphoric acid, are contacted countercurrently with respect to one another. The resulting organic phosphoric acid solution is separated from contaminants unabsorbed by the solvent, termed primary raffinate, decontaminated phosphoric acid is recovered either in the form of free acid by re-extracting the organic phosphoric acid solution with water, or in the form of an alkali metal phosphate by reacting the organic phosphoric acid solution with an alkali, and the primary raffinate is treated countercurrently with a solvent containing a mineral acid. More specifically, the organic phosphoric acid extract, which orginates from the primary raffinate treatment and contains more than 0 up to at most 10 weight% of water, is mixed with an anhydrous solvent in a ratio by weight necessary to ensure the formation of a mixture containing more than 0 and less than 50% of water than would correspond to the saturation concentration of water in the solvent; and the mixture is contacted countercurrently with the phosphoric acid which is to be decontaminated.
REFERENCES:
patent: 3684439 (1972-08-01), Rose et al.
patent: 3953581 (1976-04-01), Ehlers et al.
patent: 3956465 (1976-05-01), Amanrich
Treybal, Liquid Extraction, 1963, pp. 225-239.
Ehlers Klaus-Peter
Heymer Gero
Scheibitz Wolfgang
Schrodter Klaus
Hoechst Aktiengesellschaft
Langel Wayne A.
LandOfFree
Decontamination of wet-processed phosphoric acid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Decontamination of wet-processed phosphoric acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decontamination of wet-processed phosphoric acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1683930