Abstract:
In the electrochemical fluorination of 1,2-dichloroethane and 1,1,2-trichloroethane feedstocks, the selectivity to the products 1,2-dichlorotetrafluoroethane and 1,1,2-trichloro-1,2,2trifluoroethane is increased by charging a mixture of said feedstocks to the electrochemical fluorination cell instead of charging said feedstocks to the cell separately.
Abstract:
A combination electrode comprising a porous element, e.g., porous carbon, and a metal element in contact with an outer exposed surface of said porous element.
Abstract:
In an electrochemical process, the reaction takes place within the confines of a porous electrode element having a core section which is relatively impervious to the electrolyte and an outer section in contact with the electrolyte which has relatively large pores.
Abstract:
FLUORINATED PRODUCTS ARE RECOVERED FROM AN EFFLUENT STREAM FROM AN ELECTROLYTIC CELL IN AN ELECTROCHEMICAL FLUORINATION PROCESS BY EMPLOYING A COMBINATION OF STEPS COMPRISING COOLING SAID EFFLUENT STREAM TO A TEMPERATURE SUFFICIENT TO CONDENSE HYDROGEN FLUORIDE AND HIGHER BOILING CELL PRODUCTS CONTAINED IN SAID EFFLUENT STREAM, CONTACTING THE NONCONDENSED PORTION OF SAID COOLED EFFUENT STREAM WITH AN ABSORBENT SELECTED FROM THE GROUP CONSISTING OF (A) THE FLUORINATABLE FEEDSTOCK TO THE ELECTROLYTIC CELL, (B) A HIGH BOILING BY-PRODUCT FRACTION PRODUCED AS A BYPRODUCT IN THE FLUORINATION REACTION, AND (C) MIXTURES OF SAID (A) AND SAID (B), AND RECOVERING FLUORINATED PRODUCTS FROM THE RESULTING RICH ABSORBENT AND THE CONDENSED PORTION OF SAID COOLED EFFLUENT STREAM.