Global Patent Index - EP 0957150 A1

EP 0957150 A1 19991117 - Tar and/or oil pitch with a low content of polycyclic aromatic substances and a method for the preparation thereof

Title (en)

Tar and/or oil pitch with a low content of polycyclic aromatic substances and a method for the preparation thereof

Title (de)

Teer- und/oder Ölpech mit geringem Gehalt an polycyclischen aromatischen Stoffen und dessen Herstellung

Title (fr)

Goudron et/ou huile de brai ayant une faible teneur à des substances aromatiques polycycliques et procédé de préparation

Publication

EP 0957150 A1 19991117 (EN)

Application

EP 98830298 A 19980515

Priority

EP 98830298 A 19980515

Abstract (en)

A tar and/or oil pitch has a low content of polycyclic aromatic substances and is characterized in that it has a benzoÄaÜpyrene content less than or equal to 5 ppm, and in that it has optical anisotropy of less than 1%; it is prepared by means of a method in which a residue with a low softening point from the primary distillation of tar and/or petroleum or a mixture of the residue with tar and/or petroleum is distilled with continuous mixing in an evaporator having a heat-exchange area:volume ratio of between 1 m<2>/m<3> and 200 m<2>/m<3>, at a pressure less than or equal to 10 mbars, and at a temperature of between 250 DEG C and 360 DEG C, for a period of at least 20 minutes; the pitch according to the invention is particularly suitable for use as a binding agent in the production of electrodes, refractory materials or special graphitized materials, as an impregnating agent, and as a raw material for the production of paints, pitch coke and rechargeable batteries. <IMAGE>

IPC 1-7

C10C 1/04; C10C 3/06

IPC 8 full level

C10C 1/04 (2006.01); C10C 3/06 (2006.01)

CPC (source: EP)

C10C 1/04 (2013.01); C10C 3/06 (2013.01)

Citation (search report)

Designated contracting state (EPC)

BE CH DE DK ES FR GB IT LI NL

DOCDB simple family (publication)

EP 0957150 A1 19991117

DOCDB simple family (application)

EP 98830298 A 19980515