Method for continuously controlling the equivalent water content

Details Method for continuously controlling the equivalent water content Method for continuously controlling the equivalent water content

1977-01-03

1978-02-14

Crasanakis, George

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26068358, C07C 354

Patent

active

040738221

ABSTRACT:
The equivalent water content of hydrocarbon conversion catalyst comprising water and fluorosulfuric acid, i.e. the water equivalent to the water used to form the active catalyst, is determined continuously by contacting SO.sub.3, e.g. fuming sulfuric acid, with said catalyst in a flow ratio sufficient to maintain the mixture thus formed at the point of incipient fuming. The presence of SO.sub.3 evolved therefrom is determined by use of an SO.sub.3 detector. The flow ratio at the point of incipient fuming is a direct measure of the equivalent water used to form the catalyst system. The equivalent water content thus measured is then compared to the desired equivalent water content and a signal corresponding to the deviation is used to vary the rate of fresh acid makeup, the rate of water addition, or both to the hydrocarbon conversion process reaction zone so as to maintain the desired equivalent water content of the catalyst therein.

REFERENCES:
patent: 2592063 (1952-04-01), Persyn, Jr.
patent: 2765218 (1956-10-01), Amir
patent: 3173969 (1965-03-01), Kapff
patent: 3513220 (1970-05-01), Brandel
patent: 3625655 (1971-12-01), Culp
patent: 3864346 (1975-02-01), Child et al.
patent: 3887635 (1975-06-01), Parker et al.
patent: 4018846 (1977-04-01), Mayer

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