Process of minimizing or preventing fouling

Details Process of minimizing or preventing fouling Process of minimizing or preventing fouling

1974-10-08

1977-01-11

Scovronek, Joseph

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With prevention or removal of deleterious carbon...

148 635, 165133, C10G 916

Patent

active

040025543

ABSTRACT:
Fouling is at least minimized when heating in a distillation unit a stream comprising C.sub.4 or C.sub.5 diolefins by a method wherein said distillation unit is flushed with an inert gas, thereafter nitric oxide is introduced in an amount ranging from 0.15 to 500, preferably from 5 to 30 gm of nitric oxide per square meter of internal surface area of said heating unit, the heating unit is thereafter flushed with inert gas and the C.sub.4 or C.sub.5 diolefin stream is introduced into the heating unit. This method may be applied to a depropanizer or a debutanizer the desorber and re-distillation of the CAA process for butadiene recovery, the extractive distillation, stripping tower and re-distillation of the ACN process for isoprene recovery, or extractive distillation, stripping tower and re-distillation of the ACN process for isoprene recovery.

REFERENCES:
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patent: 3309412 (1967-03-01), Sakuragi et al.
patent: 3522093 (1970-07-01), Woolman
patent: 3848017 (1974-11-01), Shalit
Schwabe, "Kinetics of Corrosion, Passivation and Inhibition of Ferrous Metals," Chemical Abstracts, vol. 73, 1970, No. 83055c.

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