Methods for reducing anions in process chemicals

Details Methods for reducing anions in process chemicals Methods for reducing anions in process chemicals

1987-12-03

1989-09-12

Wyse, Tom

Liquid purification or separation

Processes

Chemical treatment

210769, 210771, 162 301, C02F 158

Patent

active

048657506

ABSTRACT:
Process for controlling, or reducing, the level of oxidized anions, usually oxidized sulfur compounds or oxidized nitrogen compounds, in a reaction medium, preferably in a closed loop recirculating system. The process comprises withdrawing a purge stream from the reaction medium and reducing the oxidized anions in a reduction furnance 44 having a char bed 48. The reduced compounds are recovered from the reduction furnace as smelt 50. Where the reduced compounds are useful in the reaction medium from which the purge stream was withdrawn, the reduced compounds are preferably returned to the reaction medium for further use therein.

REFERENCES:
patent: 4011129 (1977-03-01), Tomlinson, II
patent: 4085688 (1978-04-01), Smith et al.
patent: 4363698 (1982-12-01), Nelson et al.
patent: 4511549 (1985-04-01), Diemer et al.
Carter et al., "Gas Desulphurisation by the stretford Process and the Development of a Process to Treat Stretford Effluent," Symposium at McMaster Univ., Hamilton, Ontario, Canada, 3/1977.

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