Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1981-11-09
1984-03-13
Spear, Jr., Frank A.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
B01D 1104
Patent
active
044366256
ABSTRACT:
A method for removing residual cresidine from impure p-cresidine sulfonic acid which impure p-cresidine sulfonic acid contains from above about two parts per billion to about 1500 parts per million of cresidine. The method comprises contacting an aqueous solution of the impure p-cresidine sulfonic acid with sufficient liquid hydrocarbon of from five to eighteen carbon atoms for a sufficient time to extract the cresidine from the p-cresidine sulfonic acid to a concentration of less than two parts per billion of cresidine in the p-cresidine sulfonic acid.
REFERENCES:
Dictionary of Organic Compounds, vol. 1, 1965, p. 109.
Hamilton et al., Industrial Toxicology, 1949, pp. 450-454.
Wilson et al., Textbook of-Pharmaceutical Chemistry, 1954, p. 483.
Gaughan Perry J.
Grotta Henry M.
Buffalo Color Corp.
Crossetta William J.
Dunn Michael L.
Ellis Howard M.
Spear, Jr. Frank A.
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