Process for making chromium-free orthorhombic sodium sulfate

Details Process for making chromium-free orthorhombic sodium sulfate Process for making chromium-free orthorhombic sodium sulfate

1994-11-25

1996-05-28

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423183, 423607, 210913, C01G 3702, C01D 516, C01D 506

Patent

active

055209025

ABSTRACT:
Disclosed is a process for making orthorhombic Na.sub.2 SO.sub.4 containing less than 0.1 ppm chromium from a solution of Na.sub.2 SO.sub.4 containing 0.1 to 100 ppm Cr(III). The Cr(III) is oxidized to Cr(VI) at a pH greater than 7, water is evaporated from the solution to precipitate the orthorhombic Na.sub.2 SO.sub.4, and the precipitated orthorhombic Na.sub.2 SO.sub.4 is separated from the solution.

REFERENCES:
patent: 2034256 (1936-03-01), Vetter
patent: 3784672 (1974-01-01), Morgan et al.
patent: 4168240 (1979-09-01), Boekelmann et al.
patent: 4431625 (1984-02-01), Marshal et al.
patent: 4636376 (1987-01-01), Maioney et al.
patent: 4704259 (1987-11-01), Lipstzajn
patent: 4773974 (1988-09-01), Dubosz
patent: 5093089 (1992-03-01), Alford et al.
patent: 5108722 (1992-04-01), Ruthel et al.
Kirk-Othmer Encyclopedia of Chemical Technology, 3rd Edition, vol. 21, (1983), John Wiley & Sons p. 248.

Affiliated with

Also associated with

Rating

Process for making chromium-free orthorhombic sodium sulfate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for making chromium-free orthorhombic sodium sulfate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making chromium-free orthorhombic sodium sulfate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-784834