Chemistry of inorganic compounds – Halogen or compound thereof – Ternary compound
Patent
1987-03-30
1988-10-25
Capella, Steven
Chemistry of inorganic compounds
Halogen or compound thereof
Ternary compound
423499, 25218726, C01B 1104
Patent
active
047803037
ABSTRACT:
Processes for the continuous preparation of high concentration sodium hypochlorite which controls sodium chloride formed to prevent fouling of heat exchanger equipment and to provide sodium chloride particle sizes on the order of 400 microns or greater to facilitate filtration and reduce the mother liquor retention in the salt, which processes comprise reacting in two stages pure chlorine or chlorine diluted with inert gases with a sodium hydroxide having a concentration of from about 20 to about 50 weight percent, in which the first stage of chloration of the sodium hydroxide is carried out in an absorption column wherein the concentration of sodium hypochlorite and sodium hydroxide are respectively limited to 15% and 4.5% by weight, and in the second stage of chloration, the sodium hypochlorite solution leaving the absorption column is treated with pure chlorine or chlorine diluted with inert gases in a crystallizer equipped with suitable agitation.
REFERENCES:
patent: 3199949 (1965-08-01), Clerbois et al.
patent: 4428918 (1984-01-01), Verlaeten et al.
Capella Steven
Produits Chimiques Ugine Kuhlmann
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