Process for preparing nitrogen-containing isotropic pitch and ni

Details Process for preparing nitrogen-containing isotropic pitch and ni Process for preparing nitrogen-containing isotropic pitch and ni

1995-09-07

1997-02-25

Caldarola, Glenn A.

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

208 40, 208 41, 208 44, 208424, 208428, 208370, C10C 3006

Patent

active

056056184

ABSTRACT:
A process for preparing nitrogen-containing isotropic pitch, comprising the steps of mixing a petroleum heavy oil, a nitrating reagent and water to prepare a homogeneous dispersion, thereby contacting the petroleum heavy oil with the nitrating reagent in the homogeneous dispersion state to prepare a crude nitrated heavy oil, and subjecting the crude nitrated heavy oil to refining, thermal polymerization and vacuum distillation. According to the process of the invention, a petroleum heavy oil containing a large amount of light oil components and being liquid at ordinary temperature, from which pitch has been hardly prepared conventionally, is used as a starting material for preparing pitch, and there can be obtained nitrogen-containing isotropic pitch of homogeneity and high quality having a desired softening point of from a low softening point to a high softening point, though such pitch was unable to be obtained so far.

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