Method for the production of modified pitches and the further ap

Details Method for the production of modified pitches and the further ap Method for the production of modified pitches and the further ap

1987-03-09

1990-07-24

Sneed, H. M. S.g17

Mineral oils: processes and products

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

Chemical modification of asphalt, tar, pitch or resin

208 22, 208 39, 423445, 4234471, 4234472, G10C 120

Patent

active

049433652

ABSTRACT:
Contrary to known alkylation of pitches, it is disclosed that pitches are modified with particular aromatically substituted and activated C.sub.1 to C.sub.4 alkyl groups. The resulting modified pitches are easily polycondensed and give high coking residues and good mesophase formation. This is achieved on the one hand by dispensing with catalysts, which can be only incompletely removed from the pitch and, on the other hand, by employing reactive short chain alkyl aromatic compounds.

REFERENCES:
patent: 4021356 (1977-05-01), Kudchadker et al.
patent: 4399024 (1983-08-01), Fukui et al.
patent: 4431513 (1984-02-01), Lewis
patent: 4457828 (1984-07-01), Lewis
patent: 4465585 (1984-08-01), Lewis
patent: 4469585 (1984-09-01), Cukier

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