Patents by Inventor Marvin S. Rakow

Marvin S. Rakow 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: 4410420
    Abstract: A multi-zone fluidized bed hydrocarbon conversion process and apparatus for producing gas and distillable liquid products from heavy hydrocarbon feedstocks. The feedstock is introduced into an upper fluidized bed primary cracking zone maintained at temperature of 850.degree.-1400.degree. F. for cracking reactions therein, and resulting tars and coke are deposited on and within a particulate carrier material contained therein. The carrier material containing said tars and coke descends successively through a stripping zone to remove tars and an interim controlled temperature zone for secondary cracking against an upflowing hot reducing gas, then descends into a lower fluidized bed gasification zone. The gasification zone is maintained at temperature of 1600.degree.-1900.degree. F. by oxygen-containing gas and steam introduced therein to gasify the coke deposits and produce the reducing gas.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: October 18, 1983
    Assignee: HRI, Inc.
    Inventors: Barry Liss, Michael Calderon, Marvin S. Rakow
  • Patent number: 4323446
    Abstract: A multiple-zone fluidized bed coal conversion process for producing fuel gas and distillate liquid products. The coal is fed into an upper fluidized bed maintained at 950.degree.-1500.degree. F. for devolatilization. The resulting coke and some tars are deposited on a particulate carrier material, which descends along with the larger particles of unreacted coal through a stripping zone into a lower fluidized bed gasification zone, which is maintained at 1700.degree.-2000.degree. F. by steam and O.sub.2 -containing gas introduced therein to gasify the coke and char. Fine particles of unreacted coal and carrier are passed with gas and distillate vapor through a cyclone gas-solids separation step located in the devolatilization zone, from which the solids are returned to the lower bed for further gasification. Ash produced in the lower bed along with the clean hot particulate carrier is transferred through an up-transport tube to the upper bed.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: April 6, 1982
    Assignee: Hydrocarbon Research, Inc.
    Inventors: Michael C. Chervenak, Edwin S. Johanson, Marvin S. Rakow
  • Patent number: 4096194
    Abstract: An improved process for hydrating with liquid water over a solid catalyst and with a liquid solvent a liquid iso-olefin selected from the group consisting of C.sub.4 iso-olefins and C.sub.5 iso-olefins to form a corresponding product alcohol in the liquid state. The improvement comprises maintaining the liquid iso-olefins, the solvent, and the water in a single liquid phase in order to increase the conversion percentage of the iso-olefin to the corresponding alcohol.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: June 20, 1978
    Assignee: Cities Service Company
    Inventors: David Moy, Marvin S. Rakow
  • Patent number: 3946053
    Abstract: Hydrocarbyl acid phosphate salts of polyamides having at least one amino group and hydrocarbon fuel compositions containing same. The salts are formed by neutralizing with a hydrocarbyl acid phosphate at least 10% of the amino groups of a polyamide containing from about 2 to about 6 amide groups and at least one amino group. Hydrocarbon fuel compositions containing these salts exhibit desirable properties such as enhanced carburetor detergency and carburetor anti-icing characteristics, improved water tolerance, excellent rust inhibition, and cleaner engine operation while engines operated thereon exhibit reduced hydrocarbon content in the exhaust.
    Type: Grant
    Filed: September 30, 1970
    Date of Patent: March 23, 1976
    Assignee: Cities Service Oil Company
    Inventors: Franklin H. Robinson, Marvin S. Rakow, Ernest Jamieson