Vaporizing heavy hydrocarbon feedstocks without coking

Details Vaporizing heavy hydrocarbon feedstocks without coking Vaporizing heavy hydrocarbon feedstocks without coking

C - Chemistry, Metallurgy

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C10G 47/00 (2006.01) C10G 7/00 (2006.01) C10G 45/58 (2006.01) C10G 49/24 (2006.01)

Patent

CA 1248487

ABSTRACT OF THE DISCLOSURE A method for providing a vaporized heavy hydrocarbon feedstock which avoids the formation of coke in the feed heaters and is useful in a process for upgrading and/or converting the heavy hydrocarbon to lighter products, such as in a thermal hydrodealkylation process. In the method, a heavy hydrocarbon feedstock material is heated to a temperature below its coking point, then mixed with hydrogen-rich gas heated to a temperature sufficient so that upon mixing with the hydrocarbon feedstock the latter is heated and vaporized without forming coke. Alternatively, the heavy hydrocarbon feedstock can be fractionated to provide a light IBP-550°F liquid fraction, and a heavy 550-850°F liquid fraction. The light fraction is mixed with hydrogen-rich gas and heated to a temperature sufficiently high so that upon being mixed with the heavy liquid fraction the latter is heated through its dry point and vaporized without coking. The resulting vaporized hydrocarbon material is usually further heated before being fed to a reaction step, such as a hydrodealkylation reaction to produce a hydrodealkylated product.

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