Sodium metabisulfite process

Details Sodium metabisulfite process Sodium metabisulfite process

1998-05-18

1999-11-02

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423184, 423517, C01D 514

Patent

active

059764856

ABSTRACT:
Sulfur dioxide is introduced into a solution of sodium sulfite and sodium bisulfite to form sodium bisulfite in a solution having dissolved sulfur dioxide present with a pH between 3.5 and 4.2. The solution is drawn to a cooling crystallizer where an alkali such as soda ash, caustic soda, sodium sulfite, and mixtures thereof is added to produce additional sodium metabisulfite that increases the yield of sodium metabisulfite crystallizing per pass. The mother liquor is recycled.

REFERENCES:
patent: 1484818 (1924-02-01), Drewsen
patent: 2277778 (1942-03-01), Randall
patent: 2656249 (1953-10-01), Gray et al.
patent: 2862887 (1958-12-01), Boyer
patent: 3361524 (1968-01-01), Spormann et al.
patent: 3369866 (1968-02-01), Spormann et al.
patent: 3615198 (1971-10-01), Terrana et al.
patent: 3630668 (1971-12-01), Wright et al.
patent: 3649182 (1972-03-01), Miller et al.
patent: 3653812 (1972-04-01), Schneider et al.
patent: 3719742 (1973-03-01), Terrana et al.
patent: 3860695 (1975-01-01), Metzger et al.
patent: 3995015 (1976-11-01), Bean
patent: 4112061 (1978-09-01), Hoffmann et al.
patent: 4177244 (1979-12-01), Neumann et al.
patent: 4206187 (1980-06-01), Parish
patent: 4844880 (1989-07-01), Bean et al.
patent: 5753200 (1998-05-01), Zolotoochin et al.
Marks, Herman F. et al. editors, Encyclopedia of Chemical Technology, 3.sup.rd ed., vol. 22, pp. 152, 153, 166, 167 (1983).
Masson, Mary R. volume editor, Solubility Data Series, vol. 26, pp. 39-45, 72-75 (1986).
Ingruber, O.V. (1965) "Chemical Equilibria in Heated Sulphite Solutions" Pulp and Paper Magazine of Canada, pp. T-215-T-227 (Apr., 1965).
Linke, William F. and Atherton Seidell (1965) Solubilities: Inorganic and Metal-Organic Compounds, 4.sup.th ed., vol. II, K-Z, pp. 1120-1121, 1154-1157.
Nebergall, William H. et al. editors, General Chemistry4.sup.th ed., pp. 481, 795 (1972).

Affiliated with

Also associated with

Rating

Sodium metabisulfite process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sodium metabisulfite process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sodium metabisulfite process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2131153