Use of the reaction products of polyalkenylsuccinimides, triazoles, and aldehydes as anti foulants in hydrocarbon process media
AssigneeBetz Laboratories, Inc.
InventorDavid R. Forester
Life of this patent
Estimating the term…
Abstract
Reaction products of polyalkenylsuccinimides with triazoles and aldehydes are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an alkenylpolyamine to form a polyalkenylsuccinimide intermediate which, in turn, is reacted with a triazole and an aldehyde.
Drawings
Claims14
A method of inhibiting fouling deposit formation in a liquid hydrocarbonaceous medium during heat treatment processing thereof at temperatures from about 200.degree.-550.degree. C., wherein, in the absence of such antifouling treatment, fouling deposits are normally formed as a separate phase within said liquid hydrocarbonaceous medium impeding process throughput and thermal transfer, said method comprising adding to said liquid hydrocarbonaceous medium, an antifouling amount of a reaction product of a polyalkenylsuccinimide having the formula ##STR7## wherein R is an aliphatic alkyl or alkenyl moiety having at least about 50 carbon atoms and less than about 200 carbon atoms, Q is a divalent aliphatic radical, n is a positive integer, A is hydrocarbyl, hydroxyalkyl or hydrogen, Z is H or ##STR8## with a triazole and an aldehyde, said liquid hydrocarbonaceous medium comprising petroleum hydrocarbons and petrochemicals.
A method for inhibiting fouling deposit formation in a liquid hydrocarbonaceous medium during heat treatment processing thereof at temperatures from about 200.degree.-550.degree. C., wherein, in the absence of such antifouling treatment, fouling deposits are normally formed as a separate phase within said liquid hydrocarbonaceous medium impeding process throughput and thermal transfer, said method comprising adding to said liquid hydrocarbonaceous medium, an antifouling amount of an antifoulant reaction product, said antifoulant reaction product formed by first reaction of polyalkenylsuccinic anhydride with a polyamine to form a polyalkenylsuccinimide intermediate, followed by a second stage reaction of said intermediate with a triazole and an aldehyde to form said antifoulant reaction product, said liquid hydrocarbonaceous medium comprising petroleum hydrocarbons and petrochemicals.
Dependencies are inferred from the claim text.