Abstract: A stream of raw phenol, coming from the acidic cracking of cumene hydroperoxide, is purified by a process of extractive distillation carried out in the presence of acetophenone.
Type:
Grant
Filed:
May 24, 1991
Date of Patent:
November 16, 1993
Assignee:
Enimont Anic S.r.l.
Inventors:
Loreno Lorenzoni, Salvatore Simula, Giuseppe Messina, Vittorio Bruzzi
Abstract: A process of hydrodechlorination of effluents originating from the preparation of hydrocarbon resins is described, the effluents consisting of about 90% of unconverted monomers and containing between 600 and 2500 ppm of organic chlorine. Said hydrodechlorination process comprises subjecting the said effluents to hydrogenation at a temperature of between 200.degree. and 300.degree. C. in the presence of a catalyst, preferably consisting of Ni-Mo supported on .gamma.-Al.sub.2 O.sub.3.
Type:
Grant
Filed:
June 20, 1991
Date of Patent:
July 13, 1993
Assignee:
Enimont Anic S.r.l.
Inventors:
Gianfranco Biddau, Oscar Cappellazzo, Sergio E. Lai, Giuseppe Messina
Abstract: Vanadium-arenes[V(arene).sub.2 ]wherein "arene" means benzene or mono-, di- or poly-(C.sub.1 -C.sub.5)-alkyl-substituted benzene, are prepared by means of a process which comprises:(a) forming a complex:[V(arene).sub.2 ](+).AlCl.sub.4 (-)by reacting vanadium trichloride, aluminum metal and aluminum trichloride with one another, by operating in the presence of the selected arene;(b) treating the so obtained complex with an either cyclic or acyclic, liquid aliphatic ether to obtain the reduction of [V(arene).sub.2 ](+) to [V(arene).sub.2 ]; and(c) recovering the so separated vanadium-arene.The vanadium-arenes are useful in the preparation of catalysts for olefin polymerization.