Patents by Inventor Matsunaga Yuuichi

Matsunaga Yuuichi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5034557
    Abstract: Disclosed is a process for producing an aromatic carbonate which comprises reacting a phenolic compound with a di-aliphatic carbonate or an aliphatic-aromatic carbonate in the presence of a catalyst. The catalyst is either SnO and/or a tin compound represented by the following formula ##STR1## wherein X and Y are identical or different and each represents OH, SCN, OR.sup.1, OCOR.sup.1 or a halogen atom, R.sup.1 represents an alkyl or aryl group, X and Y are not alkoxy groups at the same time, and R represents an alkyl or aryl group; or at least one compound of an element selected from the group consisting of Sc, Cr, Mo, W, Mn, Au, Ga, In, Bi, Te and lantanoids. The use of these specific catalysts enables the product to be obtained in high yields and selectivities and makes it easy to purify the product.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: July 23, 1991
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yoshihisa Kiso, Matsunaga Yuuichi