초록 ▼

A method for controlling the formation of fouling deposits in a liquid hydrocarbonaceous medium, wherein in the absence of such fouling inhibition, fouling deposits would normally be formed within said medium is disclosed. The method comprises adding to said medium an antifoulant composition compris

A method for controlling the formation of fouling deposits in a liquid hydrocarbonaceous medium, wherein in the absence of such fouling inhibition, fouling deposits would normally be formed within said medium is disclosed. The method comprises adding to said medium an antifoulant composition comprising a basic antifouling compound, component (1), selected from the group consisting of alkyl phosphonate phenate sulfide, alkaline earth alkyl phosphonate phenate sulfide, an amine neutralized alkyl phsophonate phenate sulfide, or mixtures thereof, and at least one additional antifouling compound selected from components (2), (3) and (4) wherein component (2) is an effective antioxidant compound adapted to inhibit oxygen based polymerization of said hydrocarbon or petrochemical, component (3) is a corrosion inhibiting compound, and component (4) is a metal deactivator. The process comprises adding from about 0.5 to about 10,000 parts of the combination of (1) and additional antifoulant component(s) to the particular hydrocarbonaceous medium for which multifunctional antifouling protection is desired.

대표청구항 ▼

A method of inhibiting fouling deposit formation in a liquid hydrocarbonaceous medium, undergoing processing wherein in the absence of such fouling inhibition, fouling deposits would normally be formed within said medium, said method comprising adding to said medium an effective amount of an antifou

A method of inhibiting fouling deposit formation in a liquid hydrocarbonaceous medium, undergoing processing wherein in the absence of such fouling inhibition, fouling deposits would normally be formed within said medium, said method comprising adding to said medium an effective amount of an antifoulant composition comprising: Component (1) an alkyl phosphonate phenate sulfide antifoulant compound formed from the reaction of an alkyl (C1-C24) phenol sulfide and phosphoric acid; and at least one additional compound selected from the group consisting of: Component (2) an effective antioxidant compound or compounds to inhibit oxygen based polymerization of said hydrocarbon medium selected from the group consisting of: phenylenediamine compounds, substituted phenolic compounds, quinone and its derivatives; or phenothiazine and its derivatives; Component (3) a corrosion inhibiting compound or compounds to reduce corrosion of metal surfaces in contact with said hydrocarbon medium during processing thereof, selected from the group consisting of: tetrahydropyrimidines; imidazolines; reaction products of alkylene polyamines and aliphatic carboxylic acids and optionally further reacted with paraformaldehyde to give heterocyclic compounds; magnesium, calcium or amine sulfonates; reaction products of ethylene or propylene oxide with alkyl phenol to yield aromatic ethers or reaction products of a tallowpolyamine and an alkylacrylate; and Component (4) a metal deactivator compound or compounds adapted to complex with metallic impurities in said hydrocarbon medium selected from the group consisting of: N,N′-disalicylidene-1,2-cyclohexanediamine; 2,5-dimercapto-1,3,4-thiadiazole and its derivatives; or reaction products of alkyl phenol, aldehyde and polyamines to yield Mannich products; and mixtures thereof.