Patents by Inventor Ian D. Dobson

Ian D. Dobson 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: 5166450
    Abstract: This invention relates to an improved process for the production of hydroxyketones, especially dihydroxyacetone, by the condensation of one or more aldehydes in the presence of a catalyst and the use of specific process train. The product of this process is a relatively pure and any waste products from the reaction are environmentally friendly because none of the chemical components are discharged into the waste streams.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: November 24, 1992
    Assignee: BP Chemicals Limited
    Inventors: Carl A. Avison, Ian D. Dobson, Benjamin P. Gracey, Barry Hudson, Thakor Kikabhai
  • Patent number: 5093528
    Abstract: Process for producing a secondary amine terminated polyether from a primary amine terminated polyether in which the primary amine terminated polyether is reacted at elevated temperature with a carbonyl compound in the presence of hydrogen and a catalyst composition comprising nickel, ruthenium and at least one other transition metal selected from the second or third row transition metals. The amount of carbonyl compound employed is in excess of the stoichiometric amount required to react completely with the ether. The secondary amine terminated polyethers are useful in the formation of polyurea elastomers.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: March 3, 1992
    Assignee: BP Chemicals Limited
    Inventors: Ian D. Dobson, Simon F. T. Froom
  • Patent number: 5015773
    Abstract: An amine is produced by reacting in the presence of hydrogen at elevated temperature a first reactant which is a compound substantially involatile at the elevated temperature employed and having either one, two or more hydroxyl functions, each of which is independently either a primary or secondary hydroxyl function, with a second reactant which is either ammonia or a primary or a secondary amine in the presence of a reductive amination catalyst wherein the reaction is effected in either a continuously or periodically open system.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: May 14, 1991
    Assignee: BP Chemicals Limited
    Inventor: Ian D. Dobson
  • Patent number: 4937384
    Abstract: An amine is produced by reacting an amide with hydrogen at elevated temperature in the presence as catalyst of a composition comprising as a first component (i) a noble metal of Group VIII of the Periodic Table of the Elements, particularly palladium or ruthenium, and (ii) rhenium, which component may be supported, and as a second component either an alumina or a zeolite, preferably a low silica aluminosilicate zeolite, for example type A or type Y zeolite.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: June 26, 1990
    Assignee: BP Chemicals Limited
    Inventor: Ian D. Dobson
  • Patent number: 4912260
    Abstract: Amines are produced by reacting at elevated temperature a first reactant which is either an alcohol, an aldehyde or a ketone with a second reactant which is either ammonia, a primary or secondary amine or a nitrile in the presence as catalyst of a composition comprising (i) nickel, (ii) ruthenium, and (iii) at least one other transition metal selected from either the second or third row transition metals, for example palladium, rhenium or iridium.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: March 27, 1990
    Assignee: BP Chemicals Limited
    Inventors: Ian D. Dobson, Werner A. Lidy, Peter S. Williams