Method for removing or retarding paraffin buildup on surfaces in

Cleaning and liquid contact with solids – Processes – Including melting

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134 21, 134 2211, 134 30, 134 31, 134 40, 166304, 252 855B, B08B 704, E21B 3706

Patent

active

044551754

ABSTRACT:
A sulfur trioxide-containing fluid, e.g., sulfur trioxide gas, is contacted with the surfaces of equipment in contact with crude oil to retard the deposition of paraffins from the crude oil and/or to react with the paraffins already deposited on the equipment surfaces to produce a water-dispersible material which is removed with an aqueous liquid.

REFERENCES:
patent: 1445329 (1923-02-01), Lenher
patent: 2221353 (1940-11-01), Limerick et al.
patent: 2347527 (1944-04-01), Vanderbilt
patent: 2356254 (1944-08-01), Lehmann et al.
patent: 3279541 (1966-10-01), Knox et al.
patent: 4089703 (1978-05-01), White
patent: 4105841 (1978-08-01), Settineri et al.
patent: 4147638 (1979-04-01), Plummer
patent: 4363673 (1982-12-01), Settineri et al.
Chem. Abstracts, "Abstract No. 40330e", vol. 94, 1981, p. 666.

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