Bayer Aktiengesellschaft

Dieter Maertens

Gottfried Pampus

Gunther Lehnert

Manfred Zimmermann

Josef Witte

Peter Schultz

Guenther Lehnert

Andreas Huppertz

A process for the preparation of a catalyst for the polymerization and copolymerization of cyclic olefins which have 4, 5, 7 or more ring carbon atoms and at least one olefinic double bond in the ring, from

Polymerization of cyclic olefins

The invention relates to a process for the preparation of 1,5-dihydroxyanthraquinone and 1,8-dihydroxy-anthraquinone and of their mixtures. Alkali metal salts or alkaline earth metal salts of the corresponding anthraquinonedisulphonic acid are treated, in an aqueous medium under pressure and at elevated temperatures, with lime, buffer substances and, if appropriate, oxidizing agents, a surface-active agent is added to the resulting reaction mixture and the mixture is then acidified in a continuous process with mineral acid at temperatures of 50.degree. C to 150.degree. C and a pressure of 1-3 bars, and the dihydroxyanthraquinone which has precipitated is isolated. Compared to the known procedure, the process according to the invention is distinguished by a substantially improved space-time yield with at least equal purity of the reaction products.

Process for the preparation of dihydroxyanthraquinones

Polyoctenamers, in which more than 80% of the C=C-double bonds are in the cis-configuration, with a second order transition temperature of approximately -90.degree.C, a crystallisation temperature of from -30.degree. to +10.degree.C and a melting point of +10 to +40.degree.C and a process for its production, wherein cyclooctene and, optionally, up to 20% by weight, based on the monomer total, of another cyclic olefin are polymerised in an inert organic solvent at temperatures of from -50.degree. to +10.degree.C in the presence of a catalyst of

Polymerisation of cyclooctene

A process for the polymerisation of cyclooctadiene-(1,5) wherein cyclooctadiene-(1,5) is polymerised on halides of tungsten, molybdenum, tantalum, or rhenium as catalyst in the presence of bicyclo-[2,2,1]-heptadienes-(1,5) of the general formula (I) ##SPC1## as activator, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 denoting independently of each other, a monovalent hydrocarbon radical or hydrogen.

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Leverkusen, Germany

Dieter Maertens