Patents Assigned to Boulder Scientific Company
  • Conversion of hexafluorobenzene to bromopentafluorobenzene
    Patent number: 5744656
    Abstract: A method for producing tetrakis (pentafluorophenyl) borates is described. Hexafluorobenzene is converted to bromopentafluorobenzene which may be isolated and then reacted with an alkyl lithium to produce pentafluorophenyl lithium which in turn is reacted directly with an appropriate reagent to produce the desired borate.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: April 28, 1998
    Assignee: Boulder Scientific Company
    Inventor: Fredric Askham
  • Preparation of bis(acetonitrile) palladium dichloride
    Patent number: 5681976
    Abstract: A method for the production of tetrachloropalladic acid and bis(acetonitrile) palladium dichloride is described. Palladium metal is reacted with concentrated hydrochloric acid and chlorine to produce the acid which is converted to bis(acetonitrile) palladium dichloride by reaction with acetonitrile.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: October 28, 1997
    Assignee: Boulder Scientific Company
    Inventor: Terry E. Krafft
  • Method for the synthesis and use of pentafluorophenyl lithium to produce tetrakis pentafluorophenyl borate
    Patent number: 5679289
    Abstract: Procedures are disclosed which preclude significant safety hazards in the production of bulk quantities pentafluorophenyl lithium. A pentafluorophenyl compound is reacted with an alkyl lithium compound in a reaction zone, preferably temperature controlled, under conditions such that only a small amount of a predetermined quantity of pentafluorophenyl lithium product is present in the reaction zone at any time. The product may be directly discharged from the reaction zone for combination with another reactant.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: October 21, 1997
    Assignee: Boulder Scientific Company
    Inventor: Terry E. Krafft
  • Process for producing amine-boranes
    Patent number: 5516909
    Abstract: A method for producing amine-boranes, specifically pyridine-borane which is highly stable and of good color is described.
    Type: Grant
    Filed: February 15, 1994
    Date of Patent: May 14, 1996
    Assignee: Boulder Scientific Company
    Inventor: Jeffrey M. Sullivan
  • Asymmetric synthesis of chiral secondary alcohols
    Patent number: 5292929
    Abstract: A process for producing (R)-2-hydroxy-6-haloalkane is disclosed. In the first step, a cyclic alkanol is photohalogenated. In the second step, the photohalogenation product is reacted with a chiral catalyst and dialkyl zinc to produce (R)-2-hydroxy-6-haloalkane.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: March 8, 1994
    Assignee: Boulder Scientific Company
    Inventor: Jeffrey M. Sullivan
  • Stable sodium tetraphenylborate solutions
    Patent number: 5069821
    Abstract: Stable alkaline aqueous solutions of sodium tetraphenylborate.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: December 3, 1991
    Assignee: Boulder Scientific Company
    Inventors: John M. Birmingham, Jeffrey M. Sullivan
  • Thortveitite ore beneficiation process
    Patent number: 5035365
    Abstract: A thorteveitite ore beneficiation process which comprises comminuting the ore by wet autogenuous grinding to substantially liberate the thortveitite contained therein, and passing the comminuted ore through a nonuniform magnetic field to produce a concentrate and a tailing, the concentrate containing a substantially greater percentage of thortveitite than the ore.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: July 30, 1991
    Assignee: Boulder Scientific Company
    Inventor: Scott D. Birmingham