Patents Assigned to VULCANS CHEMICALS
-
Patent number: 7112709Abstract: A method for recovering much of the carbon and chlorine value in the heavy ends and other undesired by-products formed during the production of a C3 or higher polychlorinated alkane through the reaction of carbon tetrachloride with an olefine or chlorinated olefine, the improvement comprising the step of first separating the heavy ends and any other higher or lower boiling chlorohydrocarbon impurities from most of the desired product, and subjecting the separated heavy ends and impurities therewith to a high temperature exhaustive chlorination to produce carbon tetrachloride, tetrachloroethene, and minor amounts of hexachlorobutadiene and hexachlorobenzene by-products.Type: GrantFiled: September 9, 2003Date of Patent: September 26, 2006Assignee: Vulcan ChemicalsInventor: Rodney L. Klausmeyer
-
Publication number: 20040225166Abstract: A continuous process is provided for the manufacture of haloalkanes by the reaction of carbon tetrachloride with olefins in the presence of iron metal, trialkylphosphate, and ferric chloride. A fraction of the catalyst and co-catalyst are separated after the reaction and recycled. In a preferred application, the olefin is ethene, and the haloalkane product is 1,1,1,3-tetrachloropropane. Two distillation steps take place in order to enhance the production of 1,1,1,3-tetrachloropropane.Type: ApplicationFiled: August 26, 2003Publication date: November 11, 2004Applicant: VULCAN CHEMICALS A BUSINESS GROUP OF VULCAN MATERIALS COMPANYInventors: Richard L. Wilson, John L. Dawkins
-
Publication number: 20040204619Abstract: Isopropyl chloride (IPC) is prepared by the chlorination of propane or propene or propyne, or by any other means resulting in an IPC product containing significant amounts of undesired olefins. Such impure product may be purified by chlorination followed by distillation, by distillation followed by chlorination followed by distillation, by chlorination followed by treatment to reduce chlorine concentration followed by distillation, or by distillation followed by chlorination followed by treatment followed by distillation.Type: ApplicationFiled: March 25, 2004Publication date: October 14, 2004Applicant: VULCAN CHEMICALS a Business Group of Vulcan Materials CompanyInventors: Eric L. Mainz, Richard L. Wilson, John Lee Dawkins, Janice M. Nyberg
-
Patent number: 6720466Abstract: A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature and vacuum are varied.Type: GrantFiled: April 17, 2002Date of Patent: April 13, 2004Assignee: Vulcan Chemicals Division of Vulcan Materials CompanyInventors: Richard L. Wilson, John L. Dawkins, Rodney L. Klausmeyer, James J. Weller
-
Publication number: 20030229422Abstract: A chloride dioxide generation system made efficient by the use of a minimum number of seals and the use of a sophisticated computerized control system with the chlorine dioxide generation system comprising a) multiple PID loop control, b) a touch screen interface (HMI), c) automatic flow control of chemical precursors, d) a process controller, e) a minimum number of seals, f) a seal-less vacuum eductor, g) a unit design of the ejector; seal-less tubing connector and seal-less manual flowmeters, h) a vacuum eductor to be used with gas supply and other chemical feeds, i) a mass dispersion chlorine flowmeter to accurately supply amount of chlorine gas, j) an optical chlorine dioxide analyzer looped to the process controller and k) an automatic efficiency control screen.Type: ApplicationFiled: June 9, 2003Publication date: December 11, 2003Applicants: VULCAN CHEMICALS, A BUSINESS GROUP OF VULCAN MATERIALS COMPANYInventors: Edward M. Martens, Earl B. Smith, Gregory J. Beckstrom
-
Patent number: 6646020Abstract: A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a gas selected from the group consisting of a fluorohydrocarbon, perfluorocarbons, fluoroethers, hydrofluoropolyethers and mixtures thereof is disclosed. A polyisocyanurate foam or a polyurethane modified polyisocyanurate foam having a mainly closed cell structure and also a method for preparing this foam, the latter comprising closed cells wherein a foam blowing agent consisting of a mixture of 2-chloropropane and one or more HFC compounds including pentafluoropropane, pentafluorobutane, heptafluoropropane, hexafluoropropane or pentafluoroethane are disclosed. Pentanes can be added if desired. Azeotropic mixtures in which 2-chloropropane is an ingredient are disclosed.Type: GrantFiled: February 14, 2002Date of Patent: November 11, 2003Assignee: Vulcan Chemicals a division of Vulcan Materials CompanyInventors: Janice M. Nyberg, Eric L. Mainz
-
Publication number: 20030199716Abstract: A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature and vacuum are varied.Type: ApplicationFiled: April 17, 2002Publication date: October 23, 2003Applicant: VULCAN CHEMICALS DIVISION OF VULCAN MATERIALS COMPANYInventors: Richard L. Wilson, John L. Dawkins, Rodney L. Klausmeyer, James J. Weller
-
Patent number: 6627085Abstract: Disclosed is a process for reducing the amount of silicon in brine. More specifically the silicon content of the brine is reduced to 1 ppm or less by using low caustic excess. The disclosed process can also be characterized as lowering sodium hydroxide excess (caustic excess) while maintaining the sodium carbonate level thereby obtaining a brine with a low level of silicon. A further purification step employs a sludge blanket.Type: GrantFiled: June 25, 2001Date of Patent: September 30, 2003Assignee: Vulcan ChemicalsInventors: Derrek R. Burrows, Brian W. Johnson
-
Patent number: 6617479Abstract: Preparing isopropyl chloride (2-chloropropane) employing propylene, hydrochloric acid and ferric chloride catalyst in an isopropyl chloride solution at effective temperatures and pressure to produce 2-chloropropane. The amount of ferric chloride catalyst is less than that conventionally employed and the temperature and pressure are greater than conventionally employed.Type: GrantFiled: August 19, 2002Date of Patent: September 9, 2003Assignee: Vulcan Chemicals division of Vulcan Materials CompanyInventors: Rodney L. Klausmeyer, David E. Brummond
-
Patent number: 6602442Abstract: A dry disinfectant composition for the production of aqueous solutions of chlorine dioxide of predetermined concentration is formulated of a mixture of lithium hypochlorite, sodium bisulfate and sodium chlorite. Special liquid and dry formulations are also contemplated for convenience of use, for quality assurance and for safety.Type: GrantFiled: October 12, 2000Date of Patent: August 5, 2003Assignee: Vulcan ChemicalsInventor: Anthony R. Pitochelli
-
Patent number: 6552238Abstract: Provided is a method and system for separating heavy ends from a halogenated alkane in a waste stream. The method includes: (a) removing a bottom fraction containing heavy ends from a catalyst recovery unit and conveying the bottom fraction to a vessel; (b) introducing steam into the bottom fraction containing heavy ends; (c) removing a halogenated alkane vapor and a water vapor from the waste treatment unit; (d) condensing the halogenated alkane and water vapors; and (e) separating the halogenated alkane phase and water phase from the heavy ends.Type: GrantFiled: August 31, 2001Date of Patent: April 22, 2003Assignee: Vulcan ChemicalsInventors: Eric L. Mainz, Richard L. Wilson
-
Patent number: 6534688Abstract: A process is provided for the stabilization of polychlorinated alkanes against dehydrochlorination. The process comprises adding a phenol compound to a polychlorinated alkane such that the dehydrochlorination of the polychlorinated alkane is suppressed when heated in the presence of iron(III). In a preferred embodiment, the process comprises the prevention or reduction of dehydrochlorination of 1,1,1,3,3-pentachloropropane when heated in the presence of iron(III) contamination by the addition of monomethyl ether hydroquinone. In another embodiment, the long term storage stability of polychlorinated alkanes against dehydrochlorination is improved due to the addition of a phenol compound.Type: GrantFiled: June 11, 2001Date of Patent: March 18, 2003Assignee: Vulcan ChemicalsInventor: Rodney L. Klausmeyer
-
Publication number: 20030026749Abstract: Disclosed is a process for reducing the amount of silicon in brine. More specifically the silicon content of the brine is reduced to 1 ppm or less by using low caustic excess. The disclosed process can also be characterized as lowering sodium hydroxide excess (caustic excess) while maintaining the sodium carbonate level thereby obtaining a brine with a low level of silicon. A further purification step employs a sludge blanket.Type: ApplicationFiled: June 25, 2001Publication date: February 6, 2003Applicant: VULCANS CHEMICALSInventors: Derrek R. Burrows, Brian W. Johnson
-
Patent number: 6500995Abstract: A process is provided by which addition of water is used to enhance the production of any hydrochlorocarbon feedstock through the use of Kharasch chemistry, i.e. the combination of a polychlorinated alkane with an olefin to produce a chlorinated or hydrochlorinated alkane with the use of a transition metal compound in homogeneous solution as catalyst. Preferably, water is added to increase the production of 1,1,1,3,3-pentachloropropane by the reaction of carbon tetrachloride and vinyl chloride in the presence of a catalyst mixture of organo phosphate solvent, iron metal and ferric chloride.Type: GrantFiled: June 14, 2001Date of Patent: December 31, 2002Assignee: Vulcan ChemicalsInventor: Lloyd B. Branam
-
Publication number: 20020198273Abstract: A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a gas selected from the group consisting of a fluorohydrocarbon, perfluorocarbons, fluoroethers, hydrofluoropolyethers and mixtures thereof is disclosed. A polyisocyanurate foam or a polyurethane modified polyisocyanurate foam having a mainly closed cell structure and also a method for preparing this foam, the latter comprising closed cells wherein a foam blowing agent consisting of a mixture of 2-chloropropane and one or more HFC compounds including pentafluoropropane, pentafluorobutane, heptafluoropropane, hexafluoropropane or pentafluoroethane are disclosed. Pentanes can be added if desired. Azeotropic mixtures in which 2-chloropropane is an ingredient are disclosed.Type: ApplicationFiled: February 14, 2002Publication date: December 26, 2002Applicant: Vulcan Chemicals, Division of Vulcan Materials CompanyInventors: Janice M. Nyberg, Eric L. Mainz
-
Patent number: 6451253Abstract: High concentration chlorine dioxide gel compositions are prepared for disinfectant, deodorizing and for like uses. The preferred gel compositions are prepared from xanthan, guar or like gums.Type: GrantFiled: April 14, 1999Date of Patent: September 17, 2002Assignee: Vulcan Chemical Technologies, Inc.Inventors: Anthony R. Pitochelli, Jennifer R. Miller
-
Publication number: 20020125198Abstract: Ascorbic acid or one of its isomers, such as erythorbic acid is added in sufficient quantities to a chlorite-containing solution to rid the solution of chlorite. Sufficient ascorbic acid is added to the chlorite-containing solution to convert the chlorite to chloride. Industrial processes employing this process are disclosed.Type: ApplicationFiled: January 3, 2001Publication date: September 12, 2002Applicant: Vulcan Chemical Technologies, Inc.Inventor: Gregory D. Simpson
-
Patent number: 6440314Abstract: Ascorbic acid or one of its isomers, such as erythorbic acid is added in sufficient quantities to a chlorite-containing solution to rid the solution of chlorite. Sufficient ascorbic acid is added to the chlorite-containing solution to convert the chlorite to chloride. Industrial processes employing this process are disclosed.Type: GrantFiled: January 3, 2001Date of Patent: August 27, 2002Assignee: Vulcan Chemical Technologies, Inc.Inventor: Gregory D. Simpson
-
Patent number: 6304327Abstract: A novel method and apparatus for photometrically analyzing a dilute solution containing chlorine dioxide is provided. The method includes introducing a sample flow into a conduit of a chlorine dioxide analyzer. At least one light emitting diode, in communication with the sample flow, is turned on and off to pass a light beam through the sample. Upon passing through the light beam through the sample the unabsorbed light is received onto a beam splitter which separates the light into a transmitted and a reflected light. The transmitted light is directed through a filter to a first detector which measures the low concentration chlorine dioxide and the reflected light is directed to a second detector which measures a high concentration of chlorine dioxide.Type: GrantFiled: March 2, 1999Date of Patent: October 16, 2001Assignee: Vulcan ChemicalsInventors: Kurtland Scott Campbell, David August Hildebrand
-
Patent number: 6197215Abstract: A dry disinfectant composition for the production of aqueous solutions of chlorine dioxide is formulated of a mixture of lithium hypochlorite, sodium bisulfate and sodium chlorite.Type: GrantFiled: February 25, 1999Date of Patent: March 6, 2001Assignee: Vulcan ChemicalsInventor: Anthony R. Pitochelli