C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/214
C10G 19/04 (2006.01) C07D 207/00 (2006.01) C07D 237/00 (2006.01) C10G 19/02 (2006.01) C10G 19/08 (2006.01) C10G 27/06 (2006.01)
Patent
CA 1290715
ABSTRACT An improved method of treating streams having mercaptan or mercaptan-based compounds therein particularly adapted for the processes of sweetening sour hydrocarbons and regenerating spent caustic solutions is provided. Specifically, the present invention provides an improved method of treating a first stream having mercaptan or mercaptan-based compounds are either extracted, catalytically oxi- dized to disulfide compounds, or both, wherein said first stream is either a sour hydrocarbon distillate or a spent caustic solution; provided if said first stream is a sour hydrocarbon distillate said second stream is a caustic solution, and if said first stream is a spent caustic solution said second stream is: a hydrocarbon distillate, the improvement com- prising contacting said first and second streams in the presence of from about 1 ppm to about 50 ppm by weight, based upon the hydrocarbon stream of a nitrogen-based promoter comprising a non-electro- lytic, substantially sulfur free organic compound having at least one nitrogen atom, said nitrogen- based promoter being selected from the group con- sisting of: heterocyclic compounds, wherein the ring or rings of said heterocyclic compounds consist of carbon and nitrogen atoms; substituted homocyclic compounds, wherein at least one substituent attached to the ring or rings of said homocyclic compounds comprises at least one nitrogen atom; aliphatic com- pounds comprising at least one nitrogen atom; and mixtures thereof. Additional methods for treating streams as well as sweetening sour hydrocarbon distillates are provided for. The invention is applicable in a wide variety of apparatus and pro- cesses adapted for sweetening and regeneration operations.
539341
Le Binh N.
Veasey Gilbert D.
Le Binh N.
Merichem Company
Mitchell Richard J.
Veasey Gilbert D.
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