Patents Assigned to The British Petroleum Company Limited
  • Solvent extraction
    Patent number: 4045332
    Abstract: The degradation of furfural, used in the solvent extraction of aromatics, is inhibited by the use of a furfural-soluble, recoverable amine having a pK.sub.a greater than that of aniline. The preferred amine is N,N-diethyl aniline and the amount used may be 0.001 to 5% wt., preferably 0.01 to 2% wt. by weight of furfural.The recoverable amine may be used in combination with a non-recoverable amine, eg. tri-ethanolamine, the amount of non-recoverable amine being preferably 1 to 1000 ppm wt., particularly 5 to 50 ppm.
    Type: Grant
    Filed: April 27, 1976
    Date of Patent: August 30, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: Eric Simon Forbes, Angus Joseph Dickson Reid
  • Sampling device
    Patent number: 4037475
    Abstract: A sampling device for insuring a constant rate of sample flow from a conduit regardless of conduit pressure and medium viscosity, particularly in the high pressure and low viscosity ranges. In addition to the constant displacment pump a back pressure valve provides a constant pressure differential across the pump so that "slip" is maintained constant.
    Type: Grant
    Filed: March 23, 1976
    Date of Patent: July 26, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: William Henry Topham
  • Compositions containing polychloroprene
    Patent number: 4036799
    Abstract: Polychloroprene blends contain 3 - 300 parts by weight of polychloroprene of hardened extract. They may be produced by mixing latices.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: July 19, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Peter Henry Westermann
  • Chemical process producing aromatic hydrocarbons by dehydrocyclodimerization of a C.sub.4 feedstock
    Patent number: 4036902
    Abstract: This invention relates to a process for producing aromatic hydrocarbons, particularly xylenes, by dehydrocyclodimerization of a C.sub.4 feedstock in the presence of a catalyst comprising alumina promoted by zinc or a zinc compound.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: July 19, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Reginald Gregory
  • Water treatment of hydrodesulfurization catalyst to improve its microporosity
    Patent number: 4035261
    Abstract: Desulphurization catalysts particularly CoMo are improved by treating with water free from added salts.The water washing improves the pore size distribution of the catalyst.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: July 12, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: John David Hargrove, Graham Keith Hilder
  • Effluent treatment process
    Patent number: 4032439
    Abstract: A method for treating effluent water containing suspended oil from a gravity separator, which method comprises passing the effluent through a sand filter so as to remove suspended oil and produce water suitable for effective passage through a biological percolating filter; periodically stopping the flow of effluent water through the sand filter before suspended oil can pass; and backwashing the sand filter with water to remove suspended oil therefrom.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: June 28, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Guy Franklin Oldham
  • Ships for liquid cargoes
    Patent number: 4030438
    Abstract: A ship for liquid cargoes, e.g. an oil tanker, has two longitudinal bulkheads giving central and wing areas and transverse bulkheads dividing the areas into tanks. The wing areas have upper cargo tanks and lower ballast tanks, but the latter have vertical portions extending to deck level giving for example an L-shaped configuration.
    Type: Grant
    Filed: June 12, 1975
    Date of Patent: June 21, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Ian Edmund Telfer
  • Method and apparatus for orienting equipment in a well
    Patent number: 4022281
    Abstract: An apparatus for installation in a drill string to orientate equipment in or below an underwater blow out preventer has an elongate member to be corrected in the drill string and having thereon a second member moveable axially with respect thereto but having means to prevent relative rotation, the second member having a surface adapted for engagement with the rams of the blow out preventer.
    Type: Grant
    Filed: April 13, 1976
    Date of Patent: May 10, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Michael Derek Pennock
  • Oil pick up device
    Patent number: 4021344
    Abstract: An oil pick up device for removing oil off the surface of water consists of a series of vertical plates driven from a central drive member. The plates pass through the oil/water surface and oil is picked up. Scrapers remove the oil and lead it away. There is also incorporated a pneumatic device for maintaining the pick-up device at the right level in the water.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: May 3, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Michael Guthrie Webb
  • Process of protecting underwater surfaces with a wax coating containing biocides
    Patent number: 4020200
    Abstract: Underwater surfaces are protected against weed and/or shell growth with a wax coating containing one or more biocides effective against weed and/or shell growth when dissolved or dispersed in wax. The biocides are preferably sea-water insoluble and may be fresh water soluble also. They are preferably thermally stable up to 150.degree. C and soluble in wax. Suitable biocides are Cu, Zn, Ni, Co, Mn or Sn salts of carboxylic acids or polyacrylic acids, or organic compounds having an active structure containing S, Cl, N or O.The coating may be 5-500 micrometers thick.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: April 26, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: Aleksander Jerzy Groszek, Colin Walter Parkes, Ronald Alfred Crump
  • Removal of residual monomer in the presence of water by dielectric heating
    Patent number: 4020267
    Abstract: Residual vinyl halide is removed from vinyl halide polymer by radiofrequency dielectric heating while maintaining the presence of water in the polymer by impeding evaporation of water from the polymer.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: April 26, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Anthony John Park
  • Binders for electrodes
    Patent number: 4017378
    Abstract: A binder suitable for use in electrodes is prepared by distilling a residue boiling above 200.degree. C from steam cracking to give a material with a KS softening point of 55.degree. - 90.degree. C and thermally ageing the material to increase the KS softening point to 80.degree. - 100.degree. C.The residue may be obtained from the steam cracking of naphtha. The thermal ageing may be carried out by heating under reflux or by recycling the residue at the base of the distillation column.The binder preferably has a KS softening point of 88.degree. - 100.degree. C a density above 1.20, a Conradson carbon index of 45 - 60, a beta resin content of 20 - 35% wt and an alpha resin content below 10% wt.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: April 12, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: Christian Pierre Maurice Fauveau, Albert Julus Lucien Bonzom, Anne Marie Eugenie Moutard nee Andre
  • Treatment of vinyl halide polymers
    Patent number: 4015065
    Abstract: Vinyl halide monomer content of vinyl halide polymer is reduced by subjecting the polymer to radio frequency dielectric heating in the presence of added polymerization initiator.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: March 29, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: Anthony John Park, Alan Charles Sturt
  • Growth of plants
    Patent number: 4012867
    Abstract: A greenhouse cloche etc comprising an outer light transmitting wall relatively impermeable to carbon dioxide and an inner light transmitting wall relatively permeable to carbon dioxide and gas admitting means for introducing carbon dioxide gas into the space between the inner and outer walls.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: March 22, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: David Lindsay Guy Lainchbury, John Edward Preedy
  • Pipeline tool for launching two pipeline clearing spheres
    Patent number: 4011620
    Abstract: Pipeline tool for closing an open end of a pipeline and which is suitable for use with a pipeline sphere for clearing a pipeline has a tubular member for holding two spheres side by side and pipes for supplying compressed air to launch the spheres individually.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: March 15, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Donald Alan Southgate
  • Removal of residual vinyl halide monomer from vinyl halide polymers by radio frequency dielectric heating
    Patent number: 4008361
    Abstract: The residual vinyl halide content of vinyl halide polymer is reduced by radiofrequency dielectric heating of a water-containing layer of particulate polymer over which is disposed a layer of material through which vinyl chloride can pass but which restricts the passage of water e.g. perforated plastic sheet.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: February 15, 1977
    Assignee: The British Petroleum Company Limited
    Inventors: Anthony John Park, Brian Weeks
  • Control of chokes
    Patent number: 4007380
    Abstract: A well choke control apparatus comprising means for producing a first electrical signal indicative of a required position of the choke and means for deriving a second electrical signal indicative of the actual position of the choke. A comparator is arranged to be fed with the first and second electrical signals and to control actuation of the choke in the required direction to equalize said electrical signals. A number of override control arrangements may be provided to ensure that the choke is not opened or closed beyond predetermined safe limits and the main control comparator is self checking.
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: February 8, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Garry Thurgood
  • Hydrocarbon separation process
    Patent number: 4000059
    Abstract: In a 5A molecular sieve separation process for the production of n-paraffins the amount of feed required to produce a given amount of n-paraffins is reduced by recycling all of the effluent from the adsorber for a certain period during the adsorption stage.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: December 28, 1976
    Assignee: The British Petroleum Company Limited
    Inventor: Gordon James Wanless
  • Synthesis of zeolites
    Patent number: 4000248
    Abstract: The zeolite ferrierite is prepared by a process of hydrothermal crystallization in the presence of N-methyl pyridinium hydroxide.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: December 28, 1976
    Assignee: The British Petroleum Company Limited
    Inventor: David Eric Martin
  • Detergent composition for dispersing oil spills
    Patent number: 3998733
    Abstract: A detergent composition for dealing with oil spills on water comprises an ester of a polyoxyethylene glycol ester of a C10-24 fatty acid, an organic sulphate or sulphonate detergent, an alcohol or glycol of molecular weight 90-250.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: December 21, 1976
    Assignee: The British Petroleum Company Limited
    Inventors: Peter Michael Blanchard, Dudley Grahame Meeks