Control of cyanides in FCC reactor by injection of ammonium poly

Details Control of cyanides in FCC reactor by injection of ammonium poly Control of cyanides in FCC reactor by injection of ammonium poly

1983-11-10

1985-04-02

Therkorn, Ernest G.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

203 7, 208 47, 210752, 210757, 210758, 210765, 210904, 422 13, C23F 1106

Patent

active

045086834

ABSTRACT:
The concentration of cyanides in the sour water system of FCC reactor is controlled by injecting such an amount of ammonium polysulfide (APS) into the system that the weight ratio of net free sulfur to simple cyanides in the sour water is about 0.6 to about 3.8. The pH of the sour water is at least 8.0.

REFERENCES:
French, "Water-soluble Inhibitors can Control Severe Corrosion Rates in FCC Units", The Oil and Gas Journal, Apr. 12, 1976.
Knowlton, "Source Control Pays Off for Chevron", The Oil and Gas Journal, Aug. 7, 1978.
Kunz, "Refinery Cyanides: A Regulatory Dilemma", Hydrocarbon Processing, Oct., 1978.
Ehmke, "Polysulfide Stops FCCU Corrosion", Hydrocarbon Processing, Jul., 1981.

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