Patents Assigned to Novaol S.r.l.
  • Patent number: 5714623
    Abstract: A process for the preparation of carboxylic acids and esters thereof, which involves the steps of (a) mixing an unsaturated fatty acid or corresponding ester with an oxidative substance in the presence of a catalyst selected from the group consisting of oxides of tungsten and molybdenum and their acids and alkaline salts, (b) reacting the product mixture from step (a), which comprises vicinal diols, with oxygen or an oxygen-containing gas in the presence of a cobalt-containing compound which acts as a catalyst. The product mixture from step (a) is not subjected to any purification treatments prior to undergoing step (b).
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: February 3, 1998
    Assignee: Novaol S.r.l.
    Inventors: Giampiero Sabarino, Andrea Gardano, Marco Foa'
  • Patent number: 5599514
    Abstract: Process for recovering and re-using cobalt and tungsten from reaction liquors, in which said reaction liquors are treated:a) With an alkali-earth metal hydroxide in order to precipitate cobalt and tungsten, and the resulting precipitate is subsequently treated with a strong mineral acid in order to be able to dissolve the cobalt salt and separate it from H.sub.2 WO.sub.4 precipitate; orb) With an alkali metal hydroxide in order to precipitate and separate Co(OH).sub.2, and the resulting alkaline solution is then treated with an alkali-earth metal compound which is filtered and treated with a strong mineral acid in order to obtain H.sub.2 WO.sub.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: February 4, 1997
    Assignee: Novaol S.R.L.
    Inventors: Andrea Gardano, Sauro Strologo, Marco Foa'
  • Patent number: 5496786
    Abstract: A metallic catalyst composition on an inert support, suitable in particular for hydrogenolysis reactions of higher polyhydric alcohols, which comprises the following relative to 100 parts of the catalyst:a) 0.5 to 5 weight % ruthenium;b) 1 to 10 weight % tin.The catalyst is used in particular for producing lower polyhydric alcohols such as ethanediol, propylene glycol, butanediol and glycerol, by means of hydrogenolysis reaction of higher polyhydric alcohols.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: March 5, 1996
    Assignee: Novaol S.r.l.
    Inventors: Giuseppe Gubitosa, Bruno Casale