Patents Assigned to Carbochimica Italiana S.p.A. - Justia Patents Search

Patents Assigned to Carbochimica Italiana S.p.A.

Method and equipment for producing solid granules of pitch in the form of cylinders crushed at the ends

Patent number: 4482517

Abstract: The pitch is extruded at a suitable temperature through cylindrical nozzles. At the exit from these nozzles the pitch is lowered into water, where a cutter divides it into granules which, deposited on a conveyer belt, remain immersed long enough to permit suitable cooling. Then they undergo drying by hot jets of air.

Type: Grant

Filed: June 18, 1982

Date of Patent: November 13, 1984

Assignee: Carbochimica Italiana S.p.A.

Inventors: Valentino Petrini, Stefano Preda
Process for obtaining phthalic anhydride, starting from ortho-xylene, naphtalene and their mixtures, by oxidation in the presence of a specific catalyst and the catalyst obtained by carrying out said process

Patent number: 4472587

Abstract: The present invention concerns a process for obtaining phthalic anhydride by oxidizing ortho-xylene, naphthalene, or mixtures of the two, in the presence of a specific catalyst with a vanadium pentoxide and titanium dioxide base, and also regards the catalyst obtained by enactment of said process.

Type: Grant

Filed: May 18, 1982

Date of Patent: September 18, 1984

Assignee: Carbochimica Italiana S.p.A.

Inventors: Francesco Benedetti, Ezio Polacco, Angelo Celli