Patents by Inventor Malcolm J. Lawrenson

Malcolm J. Lawrenson 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).

  • Process for the production of 2,3-dimethylbutene-1 from propene
    Patent number: 4835328
    Abstract: 2,3-dimethylbutene-1 (2,3-DMB1) is produced from propene by a process comprising the steps of:(A) converting propene in one or more stages to a product comprising 2,3-dimethylbutene-2 (2,3-DMB-2) under conditions whereby the proportion of 2,3-DMB-2 in the product is maximised,(B) separating 2,3-DMB-2 from the product of step (A), and(C) contacting the 2,3-DMB-2 separated in step (B) with a catalyst active for the isomerisation of 2,3-DMB-2 to 2,3-DMB-1 under conditions whereby 2,3-DMB-2 is isomerised to 2,3-DMB-1.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: May 30, 1989
    Assignee: BP Chemicals Limited
    Inventors: Alexander G. Kent, Malcolm J. Lawrenson, Derek K. Macalpine
  • Process for the production of isobutylbenzenes
    Patent number: 4822937
    Abstract: A process for the production of isobutylbenzenes in particular, isobutylbenzene itself, is provided. The process is in two stages and comprises (1) reacting a vinylcyclohexane with an isoolefin of formula (R)(R.sup.1)C.dbd.C(CH.sub.3).sub.2 in the presence of a dismutation catalyst to produce an isobutenylcyclohexene and (2) contacting the isobutenylcyclohexene with a dehydroisomerisation catalyst to produce an isobutylbenzene. Examples of vinylcyclohexenes which can be used include 4-vinylcyclohexene and styrene.
    Type: Grant
    Filed: May 24, 1988
    Date of Patent: April 18, 1989
    Assignee: BP Chemicals Limited
    Inventors: Derek K. MacAlpine, Malcolm J. Lawrenson
  • Dismutation of functionalized olefins
    Patent number: 4556741
    Abstract: This invention relates to a process for dismuting functionalized olefins using a catalyst which has rhenium heptoxide on phosphated alumina and a metal hydrocarbon compound such as an alkyl tin. The olefins that may be dismuted are those which have a hetero atom such as oxygen, nitrogen or halide in the chain. Specific examples are olefinic compounds which have an ester, ether or a ketone group. The products of the reaction are useful chemical intermediates.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: December 3, 1985
    Assignee: BP Chemicals Limited
    Inventor: Malcolm J. Lawrenson