Composition and method for coke retardant during hydrocarbon processing
AssigneeBetz Laboratories, Inc.
InventorDwight K. Reid
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Abstract
The present disclosure is directed to methods and compositions for controlling undesirable coke formation and deposition commonly encountered during the high temperature processing of hydrocarbons. During the processing of hydrocarbon, coke formation and, in particular, filamentous coke formation can be inhibited by adding a sufficient amount of a boron compound from the group of metal borides, boron oxide compounds, and boric acid which is substantially free of water. The boron oxide compounds are particularly effective, especially when utilized in a non-polar organic liquid carrier.
Claims29
A process for inhibiting the formation and deposition of filamentous coke on metallic surfaces in contact with a hydrocarbon having a temperature of 600.degree.-1300.degree. F. which comprises adding to said hydrocarbon a sufficient amount for the purpose of a boron compound selected from the group of boron oxide compounds, boric acid and metal borides, with the proviso that when boric acid is used, it is substantially free of water.
In a method for producing coke wherein:
- (i) a hydrocarbon is charged into a zone and brought to a temperature of from about 800.degree.-1300.degree. F. to remove and recover in a separation zone any products which are volatilized from and/or formed in said hydrocarbon when heated to said temperature,
- (ii) the remainder of said hydrocarbon is transferred through transfer lines to a coke-forming area where such is cooled to form coke, and
- (iii) wherein undesired premature coke formation and deposition is normally experienced on the surfaces of said heating zone, products separation zone or transfer lines, the improvement being:
- adding to said hydrocarbon a sufficient amount of a boron compound selected from the group consisting of boron oxide compounds, boric acid and metal borides to effectively inhibit the premature formation and deposition of the undesired filamentous coke in said heating zone, transfer lines and/or volatile or product separation zone, further with the proviso that when used in said method said boric acid is substantially free of water.
Dependencies are inferred from the claim text.