Elemental Halogen Reactant Patents (Class 570/252)
  • Patent number: 4746760
    Abstract: Process for functionalizing saturated hydrocarbons comprising:(a) reacting said saturated hydrocarbons of the formula:R.sub.1 Hwherein H represents a hydrogen atom; and R.sub.1 represents a saturated hydrocarbon radical, with a metal complex of the formula:CpRh[P(R.sub.2).sub.3 ]H.sub.2whereinCp represents a cyclopentadienyl or alkylcyclopentadienyl radical;Rh represents a rhodium atom;P represents a phosphorus atom;R.sub.2 represents a hydrocarbon radical;H represents a hydrogen atom,in the presence of ultraviolet radiation to form a hydridoalkyl complex of the formula:CpRh[P(R.sub.2).sub.3 ](R.sub.1)H(b) reacting said hydridoalkyl complex with an organic halogenating agent such as a tetrahalomethane or a haloform of the formulas:CX'X''X'''X'''' or CHX'X''X'''wherein X', X'', X'", X"" represent halogens selected from bromine, iodine or chlorine atom, at a temperature in the range of about -60.degree. to -17.degree. C. to form the corresponding haloalkyl complex of step (a) having the formula:CpRhPMe.sub.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: May 24, 1988
    Assignee: Chevron Research Company
    Inventors: Robert G. Bergman, Andrew H. Janowicz, Roy A. Periana
  • Patent number: 4650916
    Abstract: Olefins containing at least 7 carbon atoms are used to remove molecular chlorine form compositions comprising 1,2-dichloroethane and a contaminating amount of molecular chlorine.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: March 17, 1987
    Assignee: PPG Industries, Inc.
    Inventor: Robert G. Briody
  • Patent number: 4614572
    Abstract: This invention relates to an improved liquid phase chlorination process for the chlorination of methyl chloride to preferentially produce methylene chloride. The chlorine is provided to the reaction mixture in a mole percent, based upon the total moles of chlorine and methyl chloride in the mix, which ranges from about 16 mole percent to about 2 mole percent.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: September 30, 1986
    Assignee: The Dow Chemical Company
    Inventors: Michael T. Holbrook, Thomas E. Morris
  • Patent number: 4518813
    Abstract: (2R,6R)-1-Chloro-2,6,10-trimethyl-undecane I, (R)-(+)-.beta.-chloro-isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)-1-chloro-2,6-dimethyl-heptane V are novel optically active units for the synthesis of the side chain of (R,R,R)-.alpha.-tocopherol. In the process according to the invention, the optically active C.sub.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: May 21, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Hansgeorg Ernst, Friedrich Vogel, Joachim Paust
  • Patent number: 4511745
    Abstract: Process for functionalizing saturated hydrocarbons selectively in the terminal position comprising:(a) reacting said saturated hydrocarbons of the formula:RHwhere:H represents a hydrogen atom, andR represents a saturated hydrocarbon radical,with a metal complex of the formula:CpRhPMe.sub.3 H.sub.2where:Cp represents a pentamethylated cyclopentadienyl radical,Rh represents a rhodium atom,P represents a phosphorous atom,Me represents a methyl group,H represents a hydrogen atom,in the presence of ultraviolet radiation at a temperature maintained at about -60.degree. to -17.degree. C. to form a hydridoalkyl complex of the formula:CpRhPMe.sub.3 RH(b) reacting said hydridoalkyl complex with a haloform of the formula:CHX.sub.3where:X represents a bromine, iodine or chlorine atom,at a temperature in the range of about -60.degree. to -17.degree. C. to form the corresponding haloalkyl complex of step (a) having the formula:CpRhPMe.sub.3 RX; and,(c) reacting said haloalkyl complex formed in (b) with halogen (X.sub.
    Type: Grant
    Filed: June 12, 1984
    Date of Patent: April 16, 1985
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Robert G. Bergman, Andrew H. Janowicz, Roy A. Periana-Pillai
  • Patent number: 4489210
    Abstract: The invention relates to a process for the halogenation of organic compounds in the liquid phase using gaseous halogenating agents, the gaseous halogenating agents being metered into the reaction vessel at such an entry velocity that a gas jet is formed in the reaction mixture at the point of entry of the halogenating agent and the formation of individual gas bubbles at the point of entry is prevented.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: December 18, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut Judat, Ulrich Schnegg, Karlfried Wedemeyer
  • Patent number: 4385192
    Abstract: A process for manufacturing 1,2-dibromo-3-chloropropane is disclosed. The process comprises the steps of reacting bromine and allyl chloride at a temperature of from 5.degree. to 85.degree. C. and maintaining the reaction mixture between 60.degree. to 90.degree. C. for a sufficient length of time so as to permit the reaction between the bromine and allyl chloride to go to completion. In addition, the process also includes the step of adding an agent so as to stabilize and purify the product so formed.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: May 24, 1983
    Assignee: AMVAC Chemical Corporation
    Inventors: Lester Friedman, Chester Callaway
  • Patent number: 4351972
    Abstract: The invention relates to the production of anhydrous alkyl iodides. To this end, carboxylic acid alkyl esters of the formula R.sup.1 COOR.sup.2, in which R.sup.1 stands for hydrogen or an alkyl or aryl radical having from 1 to 8 carbon atoms and R.sup.2 stands for an alkyl group having from 1 to 4 carbon atoms, are reacted with iodine and hydrogen and optionally with carbon monoxide in the presence of compounds of noble metals comprised of rhodium, iridium, palladium or ruthenium as catalyst, and of a heterocyclic aromatic compound, in which at least one hetero atom is a quaternary nitrogen atom, or of a quaternary organophosphorus compound as a promoter, and optionally also in the presence of a carboxylic acid having from 1 to 8 carbon atoms and/or its anhydrides. The reaction is effected under practically anhydrous conditions at temperatures of from 350 to 420 K. and under a total pressure of up to 30 bars.
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: September 28, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans K. Kubbeler, Heinz Erpenbach, Klaus Gehrmann, Klaus Schmitz
  • Patent number: 4347391
    Abstract: Method of producing ethylene dichloride characterized by reaction of ethylene and chlorine in a reaction zone containing a circulating medium and maintained below the vaporization point of the medium, and utilization of the heat from the reaction to vaporize and rectify a portion of the circulating medium in another zone to recover the product.
    Type: Grant
    Filed: January 9, 1979
    Date of Patent: August 31, 1982
    Assignee: Stauffer Chemical Company
    Inventor: Ramsey G. Campbell
  • Patent number: 4329525
    Abstract: A compound is chlorinated with chlorine to produce chlorinated product and hydrogen chloride byproduct. Recovered hydrogen chloride byproduct is contacted with oxygen and a molten salt mixture containing the higher and lower valent chlorides of a multivalent metal, such as cuprous and cupric chloride, to effect recovery of the hydrogen chloride by enriching the molten salt content of the higher valent chloride. The molten salt, enriched in higher valent chloride, is then dechlorinated by use of a stripping gas, preferably hydrogen chloride, to produce a gaseous effluent containing stripped chlorine and the stripping gas, which is then recycled to the chlorination step. The presence of stripping gas, as a diluent, improves the chlorination operation.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: May 11, 1982
    Assignee: The Lummus Company
    Inventors: Herbert Riegel, Vincent Strangio, Morgan C. Sze
  • Patent number: 4319062
    Abstract: An improved process for production of allyl chloride which comprises (1) thermally chlorinating propylene above 300.degree. C., but below that at which substantial carbon formation is effected, (2) separating the allyl chloride from its by-products, (3) subjecting the unsaturated compounds in said by-products to a low temperature chlorination, (4) separating the 1,2-dichloropropane from the products of said low temperature chlorination, and (5) passing said 1,2-dichloropropane to a cracking furnace. The effluent from the cracking furnace can be recycled to the allyl chloride finishing system by adding it to the high temperature propylene chlorination reactor effluent. Reaction temperatures are optimized to eliminate problems caused by carbon formation in the high temperature chlorination reactor, while overall yields of allyl chloride are increased and effluents which are ecologically and economically undesirable are reduced.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: March 9, 1982
    Assignee: The Dow Chemical Company
    Inventors: Theodore S. Boozalis, John B. Ivy, Gordon G. Willis
  • Patent number: 4268697
    Abstract: A process for preparing primary substituted n-alkane compounds, comprising contacting the olefin product of an olefin metathesis reaction having an alpha-olefin as the reactant with a bis-cyclopentadienyl zirconium hydrohalide and, after contacting the product of the olefin-zirconium hydrohalide reaction with an electrophilic reagent, recovering said primary substituted n-alkane compound.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: May 19, 1981
    Assignee: The Procter & Gamble Company
    Inventor: Thomas W. Gibson