Purification of stable organic compounds

Details Purification of stable organic compounds Purification of stable organic compounds

1994-11-07

1995-08-22

McCarthy, Neil

Liquid purification or separation

Processes

Chemical treatment

544237, 430617, 430965, C02F 172

Patent

active

054437423

ABSTRACT:
Metal oxidizing agents (such as silver oxide or silver nitrate) are added to a solution of organic chemicals which comprise an unwanted level of organic reducing agents (either aqueous or organic solutions in which the metal oxidizing agent does not dissolve) and the metal oxidizing agent oxidizes at least some portion of said organic reducing agents. Because the metal oxidizing agent is insoluble in the solution, it is readily removed (e.g., by filtration or sedimentary techniques) to leave a solution with reduced amounts of reducing agents therein. This process is particularly useful for purifying phthalazine, behenic acid, and other toners, the component forming the counterion with silver ion in forming the light-insensitive silver source material and any other additives and raw materials which can be dissolved in a solvent medium in which the metal oxidizing agent is not highly soluble.

REFERENCES:
patent: 4011219 (1977-03-01), Nishii et al.
patent: 4585734 (1986-04-01), Weigel

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