Patents by Inventor Jakob Oren

Jakob Oren 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: 9169178
    Abstract: This invention provides a process for obtaining propargyl bromide in high yield from propargyl alcohol and phosphorus bromide, in the form of a stable composition with alkylbromide.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: October 27, 2015
    Assignee: Bromine Compounds Ltd.
    Inventor: Jakob Oren
  • Publication number: 20150225318
    Abstract: This invention provides a process for obtaining propargyl bromide in high yield from propargyl alcohol and phosphorus bromide, in the form of a stable composition with alkylbromide.
    Type: Application
    Filed: September 16, 2013
    Publication date: August 13, 2015
    Inventor: Jakob Oren
  • Patent number: 8415513
    Abstract: A continuous process of preparing bromopicrin is disclosed. The process is effected by transferring a continuous flow of a first mixture and a continuous flow of a second mixture into a first reactor, the first mixture containing nitromethane and bromine and the second mixture containing an aqueous solution of an alkaline substance, to thereby obtain a reaction mixture which comprises bromopicrin in said first reactor; and collecting the bromopicrin from the reaction mixture. Highly pure bromopicrin obtained by this process is also disclosed.
    Type: Grant
    Filed: May 26, 2008
    Date of Patent: April 9, 2013
    Assignee: Bromine Compounds Ltd.
    Inventors: Jakob Oren, Nasif Yassin, Ron Frim
  • Patent number: 7943806
    Abstract: Process of preparing high purity bromopicrin, and high purity bromopicrin produced therefrom. Providing a mixture of nitromethane and bromine, and preferably water, and absent of organic solvent. Adding an aqueous solution of an alkaline substance to the mixture, thereby providing a reaction mixture containing bromopicrin, the adding performed such that no excess of the alkaline substance occurs in the reaction mixture during the adding. Collecting the organic phase (containing the bromopicrin) from the reaction mixture. No need for subjecting the organic phase of the reaction mixture to distillation or extraction, for obtaining near quantitative yield of bromopicrin having purity of at least equal to or greater than 96 weight percent. Process parameters controlling selectivity of reaction forming bromopicrin are molar ratio of bromine and nitromethane in the mixture; reaction temperature while bromopicrin is formed; concentration of the alkaline substance in the aqueous solution; and reaction time.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: May 17, 2011
    Assignee: Bromine Compounds Ltd.
    Inventors: Jakob Oren, Leah Golan, Ron Frim
  • Publication number: 20100204528
    Abstract: A continuous process of preparing bromopicrin is disclosed. The process is effected by transferring a continuous flow of a first mixture and a continuous flow of a second mixture into a first reactor, the first mixture containing nitromethane and bromine and the second mixture containing an aqueous solution of an alkaline substance, to thereby obtain a reaction mixture which comprises bromopicrin in said first reactor; and collecting the bromopicrin from the reaction mixture. Highly pure bromopicrin obtained by this process is also disclosed.
    Type: Application
    Filed: May 26, 2008
    Publication date: August 12, 2010
    Applicant: Bromine Compounds Ltd.
    Inventors: Jakob Oren, Nasif Yassin, Ron Frim
  • Publication number: 20100152501
    Abstract: Process of preparing high purity bromopicrin, and high purity bromopicrin produced therefrom. Providing a mixture of nitromethane and bromine, and preferably water, and absent of organic solvent. Adding an aqueous solution of an alkaline substance to the mixture, thereby providing a reaction mixture containing bromopicrin, the adding performed such that no excess of the alkaline substance occurs in the reaction mixture during the adding. Collecting the organic phase (containing the bromopicrin) from the reaction mixture. No need for subjecting the organic phase of the reaction mixture to distillation or extraction, for obtaining near quantitative yield of bromopicrin having purity of at least equal to or greater than 96 weight percent. Process parameters controlling selectivity of reaction forming bromopicrin are molar ratio of bromine and nitromethane in the mixture; reaction temperature while bromopicrin is formed; concentration of the alkaline substance in the aqueous solution; and reaction time.
    Type: Application
    Filed: August 22, 2006
    Publication date: June 17, 2010
    Applicant: Bromine Compounds Ltd.
    Inventors: Jakob Oren, Leah Golan, Ron Frim
  • Patent number: 7605207
    Abstract: Polybrominated bisaryl compounds containing bromomethyl or bromomethylene groups are provided, as well as flameproof polymeric formulations comprising the compounds. The novel compounds exhibit a good thermal stability, and are particularly suitable for flame-retarding polystyrene thermoplastic foams. A process for making the polybrominated bisaryl compounds is also provided.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: October 20, 2009
    Assignee: Bromine Compounds Ltd.
    Inventors: Jakob Oren, Nasif Yassin, Joseph Zilberman, Dorit Canfi, Ron Frim, Dov Beruben
  • Patent number: 7585912
    Abstract: The present invention relates to a styrenic polymer composition comprising a flame-retardant effective amount of a compound of formula (I): (C6H(5-n)Yn)CH2X, wherein X is Cl or Br; Y is Cl or Br; and n is an integer between 1 and 5; or a mixture of two or more of said compounds of formula (I) or their homologues and derivatives or other Br-FRs.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: September 8, 2009
    Assignee: Bromine Compounds Ltd.
    Inventors: Nurit Kornberg, Jakob Oren, Smadar Hini, Michael Peled
  • Publication number: 20080281024
    Abstract: Polybrominated bisaryl compounds containing bromomethyl or bromomethylene groups are provided, as well as flameproof polymeric formulations comprising the compounds. The novel compounds exhibit a good thermal stability, and are particularly suitable for flame-retarding polystyrene thermoplastic foams. A process for making the polybrominated bisaryl compounds is also provided.
    Type: Application
    Filed: November 16, 2006
    Publication date: November 13, 2008
    Applicant: BROMINE COMPOUNDS LTD.
    Inventors: Jakob Oren, Nasif Yassin, Joseph Zilberman, Dorit Canfi, Ron Frim, Dov Beruben
  • Publication number: 20070257241
    Abstract: The present invention relates to a styrenic polymer composition comprising a flame-retardant effective amount of a compound of formula (I): (C6H(5-n)Yn)CH2X, wherein X is Cl or Br; Y is Cl or Br; and n is an integer between 1 and 5; or a mixture of two or more of said compounds of formula (I) or their homologues and derivatives or other Br-FRs.
    Type: Application
    Filed: July 19, 2005
    Publication date: November 8, 2007
    Inventors: Nurit Kornberg, Jakob Oren, Smadar Hini, Michael Peled
  • Patent number: 6037503
    Abstract: A process for the preparation of p-fluorophenol, which comprises hydrolyzing p-bromofluorobenzene with a mixture of NaOH and Na.sub.2 CO.sub.3 in the presence of a copper catalyst.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: March 14, 2000
    Assignee: Bromine Compounds Ltd.
    Inventors: Jakob Oren, Michel Adda
  • Patent number: 5847241
    Abstract: Process for the production of p-bromofluorobenzene by the bromination of fluorobenzene, characterized in that the bromination is carried out with liquid bromine at temperatures below 0.degree. C.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: December 8, 1998
    Assignee: Bromine Compounds Ltd.
    Inventor: Jakob Oren
  • Patent number: 5703274
    Abstract: A process for the preparation of 5-hydroxyisophthalic acid (5-HIPA) that comprises hydrolyzing a starting material chosen from among 5-bromoisophthalic acid (5-BIPA), mixtures of 5-BIPA and dibromoisophthalic acid isomers, and salts of thereof in an aqueous alkaline solution, in the presence of a catalytically effective amount of a copper compound catalyst and in a temperature range of between 100.degree. and 270.degree. C.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: December 30, 1997
    Assignee: Bromine Compounds Ltd.
    Inventors: Mark Gelmont, Joseph Bercovici, Jakob Oren
  • Patent number: 5344986
    Abstract: Compounds of the formula: ##STR1## wherein: n=0 or 1;R.sub.1 and R.sub.2 are C.sub.1 to C.sub.3 alkyl groups, or R.sub.2 may be H when n=0; and Y is selected from the group: ##STR2## wherein: m=1-6Z=SO.sub.2, S, C=O, CH.sub.2 or C(CH.sub.3).sub.2 ; and a process for their preparation are described.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: September 6, 1994
    Assignee: Bromine Compounds, Ltd.
    Inventors: Jakob Oren, Joshua Hermolin, David Feldman, Michael Zviely, Dov Zamir, Hugo Keselman
  • Patent number: 5196605
    Abstract: In a process for the preparation of 4,4'-dihydroxybiphenyl of high purity 4,4'-dibromobiphenyl is hydrolized in the presence of a copper compound catalyst, the insoluble materials comprising the catalyst is filtered off from the product mixture, 4,4'-dihydroxybiphenyl is precipitated by adjusting the pH and crude 4,4'-dihydroxybiphenyl separated from the product mixture is fractionally distilled to obtain substantially pure 4,4'-dihydroxybiphenyl.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: March 23, 1993
    Assignee: Bromine Compounds, Ltd.
    Inventors: Jakob Oren, Hugo Kesselman, Joshua Hermolin
  • Patent number: 5118877
    Abstract: In a process for the preparation of mixtures of 2,3-dimethylphenol and 3,4-dimethylphenol a mixture of 2,3-dimethyl-bromobenzene and 3,4-dimethyl-bromobenzene is hydrolized in an aqueous alkaline solution in the presence of a copper compound catalyst of the formula:Cu.sub.(n) R.sub.(m)R represents --O or --OH or a residue of an inorganic or of an organic acid;n is 1 or 2; andm is 0, 1 or 2;the reaction being carried out at a temperature in the range between 200.degree. and 300.degree. C.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: June 2, 1992
    Assignee: Bromine Compounds Limited
    Inventors: Jakob Oren, Michael Zviely, Joshua Hermolin