Method for purifying cresidine sulfonic acid by resin extraction

Details Method for purifying cresidine sulfonic acid by resin extraction Method for purifying cresidine sulfonic acid by resin extraction

1981-11-09

1985-12-17

Hines, Robert V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260505P, 564437, 564438, 564443, C07C14364

Patent

active

045591822

ABSTRACT:
A method for removing residual cresidine from impure p-cresidine sulfonic acid which impure p-cresidine sulfonic acid contains from above two parts per billion to about 1500 parts per million of cresidine. The method comprises contacting an aqueous solution of the p-cresidine sulfonic acid with a sufficient quantity of particles of a crosslinked lipophilic porous resin for a sufficient time to reduce the concentration of p-cresidine in the cresidine sulfonic acid to less than 2 parts per billion.

REFERENCES:
patent: 2787618 (1957-04-01), McCandlish
patent: 2950319 (1960-08-01), Schenck et al.
patent: 4163023 (1979-07-01), Endo et al.
Rohm and Haas, "Ion Exchange with the Amberlite Resins", pp. 9-10, Nov. 1960 Ed.

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