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).
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Publication number: 20240002323Abstract: A process for the preparation of cis-2-alkenoic acid or an alkali metal salt thereof, comprising rearranging 1,3-dibromo-2-alkanone in an alkaline environment in the presence of a catalytically effective amount of an alkali metal salt of cis-2-alkenoic acid, and isolating from the reaction mixture cis-2-alkenoic acid, either in the form of the free acid or in the form of the alkali metal salt.Type: ApplicationFiled: November 30, 2021Publication date: January 4, 2024Inventors: Jakob OREN, Nasif YASSIN, Nicka CHINKOV, Ronit YAHALOMI SEGUI
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Patent number: 9169178Abstract: 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: GrantFiled: September 16, 2013Date of Patent: October 27, 2015Assignee: Bromine Compounds Ltd.Inventor: Jakob Oren
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Publication number: 20150225318Abstract: 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: ApplicationFiled: September 16, 2013Publication date: August 13, 2015Inventor: Jakob Oren
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Patent number: 8415513Abstract: 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: GrantFiled: May 26, 2008Date of Patent: April 9, 2013Assignee: Bromine Compounds Ltd.Inventors: Jakob Oren, Nasif Yassin, Ron Frim
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Patent number: 7943806Abstract: 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: GrantFiled: August 22, 2006Date of Patent: May 17, 2011Assignee: Bromine Compounds Ltd.Inventors: Jakob Oren, Leah Golan, Ron Frim
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Publication number: 20100204528Abstract: 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: ApplicationFiled: May 26, 2008Publication date: August 12, 2010Applicant: Bromine Compounds Ltd.Inventors: Jakob Oren, Nasif Yassin, Ron Frim
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Publication number: 20100152501Abstract: 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: ApplicationFiled: August 22, 2006Publication date: June 17, 2010Applicant: Bromine Compounds Ltd.Inventors: Jakob Oren, Leah Golan, Ron Frim
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Patent number: 7605207Abstract: 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: GrantFiled: November 16, 2006Date of Patent: October 20, 2009Assignee: Bromine Compounds Ltd.Inventors: Jakob Oren, Nasif Yassin, Joseph Zilberman, Dorit Canfi, Ron Frim, Dov Beruben
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Patent number: 7585912Abstract: 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: GrantFiled: July 19, 2005Date of Patent: September 8, 2009Assignee: Bromine Compounds Ltd.Inventors: Nurit Kornberg, Jakob Oren, Smadar Hini, Michael Peled
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Publication number: 20080281024Abstract: 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: ApplicationFiled: November 16, 2006Publication date: November 13, 2008Applicant: BROMINE COMPOUNDS LTD.Inventors: Jakob Oren, Nasif Yassin, Joseph Zilberman, Dorit Canfi, Ron Frim, Dov Beruben
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Publication number: 20070257241Abstract: 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: ApplicationFiled: July 19, 2005Publication date: November 8, 2007Inventors: Nurit Kornberg, Jakob Oren, Smadar Hini, Michael Peled
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Patent number: 6037503Abstract: 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: GrantFiled: July 14, 1998Date of Patent: March 14, 2000Assignee: Bromine Compounds Ltd.Inventors: Jakob Oren, Michel Adda
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Patent number: 5847241Abstract: 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: GrantFiled: August 26, 1996Date of Patent: December 8, 1998Assignee: Bromine Compounds Ltd.Inventor: Jakob Oren
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Patent number: 5703274Abstract: 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: GrantFiled: March 26, 1996Date of Patent: December 30, 1997Assignee: Bromine Compounds Ltd.Inventors: Mark Gelmont, Joseph Bercovici, Jakob Oren
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Patent number: 5344986Abstract: 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: GrantFiled: March 7, 1991Date of Patent: September 6, 1994Assignee: Bromine Compounds, Ltd.Inventors: Jakob Oren, Joshua Hermolin, David Feldman, Michael Zviely, Dov Zamir, Hugo Keselman
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Patent number: 5196605Abstract: 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: GrantFiled: May 28, 1991Date of Patent: March 23, 1993Assignee: Bromine Compounds, Ltd.Inventors: Jakob Oren, Hugo Kesselman, Joshua Hermolin
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Patent number: 5118877Abstract: 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: GrantFiled: January 10, 1991Date of Patent: June 2, 1992Assignee: Bromine Compounds LimitedInventors: Jakob Oren, Michael Zviely, Joshua Hermolin