Atomized polysulfide used in ethylene steam cracker

Details Atomized polysulfide used in ethylene steam cracker Atomized polysulfide used in ethylene steam cracker

C - Chemistry, Metallurgy

10

G

C10G 9/00 (2006.01) C07C 4/02 (2006.01) C07C 4/04 (2006.01) C07C 7/20 (2006.01) C08G 75/00 (2006.01) C08G 75/14 (2006.01) C10G 9/16 (2006.01) C10G 11/00 (2006.01)

Patent

CA 2443139

Dialkyl polysulfides can be added to hydrocarbon gas fed streams for alkene steam crackers for the petrochemical industry. The polysulfides act as sulfiding agents for surfaces of the steam crackers and thereby reduce coking and CO generation. A preferred polysulfide is a di-t-butyl polysulfide. Such compounds tend to have lower vapor pressure, reasonable viscosities, and are relatively nonflammable as compared to the lower molecular weight sulfur containing compounds.

On peut ajouter des polysulfures de dialkyle à des vapocraqueurs alimentés par un gaz hydrocarbure afin de produire des alcènes utilisés dans l'industrie pétrochimique. Lesdits polysulfures agissent comme des agents de sulfuration sur les surfaces des vapocraqueurs et réduisent ainsi l'encrassement et la production de CO. Un polysulfure préféré est un di-t-butyl polysulfure. Ces composés possèdent de basses pressions de vapeur, des viscosités raisonnables, et sont relativement non inflammables comparés aux composés contenant du soufre dont le poids moléculaire est plus faible.

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