Additive combination and method for using it to inhibit deposit

Details Additive combination and method for using it to inhibit deposit Additive combination and method for using it to inhibit deposit

1985-06-04

1986-10-21

Metz, Andrew H.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With prevention or removal of deleterious carbon...

585 4, 585950, 252 83, 252515A, 252401, 252403, 252406, C10G 916

Patent

active

046184112

ABSTRACT:
Deposit formation on the contact surfaces of structures containing heated hydrocarbon fluids such as refinery units, particularly units associated with the distilling process such as preheating stages, is inhibited by incorporating in the feed stock from 0.0001 to 0.01 weight percent of the combination of thiophene-containing polycondensed aromatic
aphthenic compounds of number average molecular weight (Mn) from 200 to 1000 and a macrocyclic polyamine of 2 to 8 nitrogen atoms per molecule and, if desired, at least one other additive such as an oil-soluble dispersant, antioxidant, antipolymerant, anti-foulant and mixtures thereof into said hydrocarbon stream.

REFERENCES:
patent: 4024049 (1977-05-01), Shell et al.
patent: 4031002 (1977-06-01), McKay
patent: 4116812 (1978-09-01), Godar et al.
patent: 4190462 (1980-02-01), De Jong et al.
patent: 4193891 (1980-03-01), McKay
patent: 4195976 (1980-04-01), Ryer et al.
patent: 4216076 (1980-08-01), Dillon et al.
patent: 4226700 (1980-10-01), Broom
patent: 4265711 (1981-05-01), Gleim
patent: 4529500 (1985-06-01), Miller et al.
patent: 4569750 (1986-02-01), Brownawell et al.

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