Two-stage hydrotreating of pyrolysis gasoline to remove mercapta

Details Two-stage hydrotreating of pyrolysis gasoline to remove mercapta Two-stage hydrotreating of pyrolysis gasoline to remove mercapta

1977-10-19

1978-09-12

Crasanakis, George

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208212, 208255, C10G 2304

Patent

active

041136039

ABSTRACT:
A pyrolysis gasoline, containing dienes and mercaptan sulphur is hydrotreated in a first stage in the presence of a non-noble metal catalyst under conditions primarily designed to effect mercaptan sulphur reduction, rather than diene reduction, followed by hydrotreating in a second stage in the presence of a noble metal catalyst to effect the desired reduction in diene value. The two stage treatment results in a stable pyrolysis gasoline product free of excessive polymer requiring no re-distillation, with "doctor sweet" quality, with the treatment being effected at higher space velocities and lower temperatures than those normally employed.

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