Patents Assigned to BASF
  • Recovery of 1,3-butadiene from a C.sub.4 -hydrocarbon mixture
    Patent number: 4049742
    Abstract: 1,3-Butadiene is recovered with the aid of a selective solvent from a C.sub.4 -hydocarbon mixture containing 1,3-butadiene, hydrocarbons which are more soluble in said selective solvent than 1,3-butadiene, including acetylenes and possibly 1,2-butadiene and C.sub.5 -hydrocarbons, and hydrocarbons which are less soluble in said selective solvent than 1,3-butadiene. The C.sub.4 -hydrocarbon mixture is separated by the use of one or more extractive distilling zones into a distillate containing the less soluble hydrocarbons, a stream consisting of 1,3-butadiene and a stream containing the more soluble hydrocarbons including the higher acetylenes and 1,3-butadiene, the latter stream being subjected to catalytic hydrogenation.
    Type: Grant
    Filed: March 23, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Ulrich Wagner, Klaus Volkamer, Eckart Schubert, Friedhelm Bandermann
  • Manufacture of polylactams with initial pressures above vapor pressures of starting materials
    Patent number: 4049638
    Abstract: A process for continuous production of polyamides by continuous transport of a mixture of one or more lactams and from 1 to 15% and preferably from 3 to 8% of water and optionally other polyamide-forming compounds such as the salts of dicarboxylic acids and diamines or aminocarboxylic acids through a number of reaction zones under polyamide-forming conditions, said mixture of starting materials being heated in a first reaction zone to temperatures of from 210.degree. to 330.degree. C and preferably from 220.degree. to 280.degree. C, whereupon the polycondensation mixture is adiabatically vented in a further reaction zone and is then polymerized to completion in yet another reaction state to form high molecular weight polyamides. The process is characterized in thatA.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Doerfel, Claus Cordes
  • Manufacture of polyurethane compositions
    Patent number: 4049590
    Abstract: Polyurethane compositions -- which may or may not be foamed -- having improved mechanical properties are manufactured from organic polyisocyanates, polyhydroxy compounds and one or more at least partially crosslinked, particulate polymers of particle size from 500 to 5,000 A, of which polymer from 1 to 40% by weight are dispersed in the polyhydroxy compound.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Falkenstein, Dieter Stein, Franz Haaf, Gerhard Heinz, Ernst Schoen
  • Corrosion test cell
    Patent number: 4049525
    Abstract: A corrosion test cell suitable for determining the electrochemical corrosion parameters of metals in corrosive liquid environments. The cell comprises an electrically non-conductive vessel with a plurality of metallic rods connectable to test electrodes, which electrodes extend into the liquid environment contained therein.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Wyandotte Corporation
    Inventors: Daniel Ronan Dutton, Thomas Carl Musolf
  • Vinyl-substituted sulfamic acid halides
    Patent number: 4049709
    Abstract: New sulfamic acid halides and a process for the manufacture of sulfamic acid halides by reacting sulfamic acids with aldehydes and acid halides. The products are starting materials for the manufacture of crop protection agents, dyes and pharmaceuticals.
    Type: Grant
    Filed: October 22, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Hamprecht, Siegfried Kersten
  • Sprayed cathodes
    Patent number: 4049841
    Abstract: A ferrous metal cathode used in a chlor-alkali electrolytic cell has a metallic coating deposited thereon. The metallic coating is applied by either flame spraying or plasma spraying a powdered metal onto the ferrous metal surface. The metals which are utilized are those having a lower hydrogen overvoltage than iron.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: September 20, 1977
    Assignee: BASF Wyandotte Corporation
    Inventors: Thomas G. Coker, Shyam D. Argade
  • Dyeing and printing of cellulosic fibers or mixtures of cellulosic fibers with synthetic fibers
    Patent number: 4049377
    Abstract: An improved process for dyeing or printing water-swellable cellulosic fibers and mixtures of said cellulosic fibers with synthetic fibers by contacting the fibers throughout with a dye liquor or print paste which contains, as essential ingredients, water in an amount sufficient to swell the cellulosic fibers, a water-insoluble disperse dye and a water-soluble solvent for the disperse dye such as polyethylene glycol or boric acid esters of polyethylene glycols, and heating the contacted fibers to fix the dye, the improvement comprising the addition of from 0.5 to 5% by weight, based on the dye liquor or print paste, of a condensate of an aliphatic monocarboxylic acid of from 8 to 20 carbon atoms and a primary or secondary hydroxyalkylamine of up to 6 carbon atoms, which condensate may be ethoxylated with up to 20 moles of ethylene oxide per mole of condensate.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hermann Schwab, Adolf Blum
  • Self-extinguishing thermoplastic molding compositions
    Patent number: 4049622
    Abstract: Thermoplastic molding compositions based on styrene polymers contain, as a flameproofing agent, an organic bromine compound of the general formula ##STR1## where X is a hydrocarbon radical and n is 0 or 1. The compositions may be used for the manufacture of self-extinguishing moldings, e.g. foams.
    Type: Grant
    Filed: August 18, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Fleig, Helmut Hagen, Herbert Naarmann, Klaus Penzien
  • Method and apparatus for generating constant tape tension in a tape transport apparatus
    Patent number: 4049216
    Abstract: A method of generating constant tape tension in a tape transport apparatus of the type in which the supply and take-up reels of tape are simultaneously driven by surface engagement with a driving capstan.The method involves the utilization of a flexible but relatively inelastic belt around the periphery of resilient capstan material to introduce reel size-related supply and take-up reel velocity adjustments to counteract the similar but opposite velocity adjustments which inherently occur through the use of a resilient capstan and which, if uncompensated, result in undesirable tension variations during the course of the tape transporting operation.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Donald L. Burdorf, James Bjordahl
  • Complex basic zirconium salts and aluminum salts
    Patent number: 4049379
    Abstract: New complex salts with zirconium and aluminum as central atoms and oxo, hydroxy, organic acido and sulfato groups as ligands, and a process for tanning skins and hides with these complex salts as tanning materials.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Erdmann, Franz-Friedrich Miller
  • Manufacture of a catalyst composition containing zinc and nickel or cobalt
    Patent number: 4049571
    Abstract: A process for the manufacture of a catalyst capable of causing condensation of aldehydes with ketones or ketones with each other while simultaneously hydrogenating the resulting olefinically unsaturated ketones to saturated ketones in the presence of hydrogen without attacking the ketone group, and containing zinc in addition to nickel or cobalt. The catalyst is subjected, prior to use, to a surface after-treatment with a zinc salt.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Axel Nissen, Werner Fliege, Dieter Voges
  • Manufacture of bonded textile sheet materials
    Patent number: 4049851
    Abstract: Bonded textile sheet materials having improved water vapor absorbency can be manufactured by bonding the sheets with polymeric binders and additionally impregnating these sheets with glycidyl ethers, chlorohydrin compounds corresponding thereto and/or reaction products of the chlorohydrin compounds with compounds containing NH groups, and drying the impregnated sheets at elevated temperatures and at the same time fixing the impregnants by means of compounds containing NH groups.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Greif, Rolf Fikentscher, Axel Sanner
  • Polyester molding compositions of reduced flammability
    Patent number: 4048135
    Abstract: Thermoplastic, linear, saturated polyesters containing flameproofing agents consisting of halogen compounds and an antimony trioxide which has been prepared in an aqueous suspension of an inorganic support using an aqueous antimony(III) halide solution and adding an aqueous solution of a base to raise the pH to from 6 to 8 with precipitation of the antimony compound onto the support, followed by separation of the solids from the aqueous phase.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Wurmb, Bernd Leutner, Wolfgang Seydl, Hans-Ulrich Schlimper, Hans-Josef Sterzel
  • Manufacture of 1-substituted oximino cyclo alkenes-(1)
    Patent number: 4048165
    Abstract: Manufacture of 1-substituted oximino cycloalkenes-(1) by reacting appropriately substituted cycloalkenes with nitrogen monoxide and oxygen. The products are intermediates in the manufacture of dyes and pesticides.
    Type: Grant
    Filed: August 11, 1975
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Kurt Kahr, Rolf Fischer
  • Production of aminonitrodihydroxyanthraquinones by partial reduction dinitrodihydroxyanthraquinones
    Patent number: 4048199
    Abstract: The production of aminonitrodihydroxyanthraquinones of the formula: ##STR1## in which one X is OH and the other X is NO.sub.2 by partial reduction of the corresponding dinitrodihydroxyanthraquinone or mixtures thereof by heating at 80.degree.-250.degree. C in the presence of 1/2 to 5 times the weight thereof of an unsubstituted or substituted phenol. The reduction is accelerated by being carried out in the presence of a small amount such as 0.5-20 mol percent of an alkaline-reacting agent. Pure aminonitrohydroxyanthraquinones are obtained which are free from diaminodihydroxyanthraquinones.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Elser, Gerhard Epple
  • Manufacture of olefin polymers
    Patent number: 4048414
    Abstract: A process for the manufacture of olefin polymers by polymerization of monoolefins using a silicic xerogel/chromium trioxide catalyst obtained by (1) synthesizing a particulate silicic xerogel, (2) doping said xerogel with chromium trioxide or a chromium compound capable of converting to chromium trioxide under the conditions of stage (3) and (3) heating the resulting product in a gas stream containing oxygen. The silicic xerogel/chromium trioxide catalyst used is one which has been obtained by (1) synthesizing the silicic xerogel in the first stage by (1.1) starting with a silicic hydrogel having a relatively high solids content, (1.2) extracting water from said hydrogel by means of an alkanol and/or alkanone until the organic liquid absorbs no further water, (1.3) extracting the organic liquid used in stage (1.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Frielingsdorf, Wolfgang Gruber, Heinz Mueller-Tamm
  • Manufacture of copolymers of ethylene
    Patent number: 4048411
    Abstract: A process for the manufacture of copolymers of ethylene with vinyl acetate at pressures above 800 atmospheres and at from 150.degree. to 350.degree. C, using mean residence times of up to at most 100 seconds. The reaction mixture obtained from the polymerization is kept for from 2 to 10 minutes at from 150.degree. to 250.degree. C under a pressure below 500 atmospheres. Homogeneous ethylene/vinyl acetate copolymers are obtained without the formation of substantial amounts of free acetic acid by decomposition of the vinyl acetate.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Georg Mietzner, Klaus Pfleger, Hans Gropper, Oskar Buechner, Klaus Boettcher, Wieland Zacher
  • Electrochemical cell with bipolar electrodes
    Patent number: 4048047
    Abstract: An electrochemical cell with a nonpartitioned electrolyte chamber and plane electrodes, which form a stack, the chamber filled by the electrolyte forming narrow gaps between the electrodes, and the electrode stack being assembled on a fixed baseplate so that its axis is essentially vertical.
    Type: Grant
    Filed: January 14, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz Beck, Diethard Francke, Heinz Nohe, Heinz Hannebaum, Manfred Stroezel
  • Catalyst for the hydrogenation of acetylene alcohols
    Patent number: 4048116
    Abstract: An improved catalyst for the complete hydrogenation of acetylenically unsaturated alcohols and based on nickel, copper and manganese. The catalyst is used without a support and molybdenum is additionally included in an amount approximately equal to the content of manganese.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Voges, Karl Baer, Juergen Boudier, Siegfried Winderl, Herwig Hoffmann
  • Manufacture of butanediol and/or tetrahydrofuran from maleic and/or succinic anhydride via .gamma.- butyrolactone
    Patent number: 4048196
    Abstract: A process for the manufacture of 1,4-butanediol and/or tetrahydrofuran, wherein maleic acid or succinic acid is used as the starting material, butyrolactone is produced in defined stages and is hydrogenated to butanediol or tetrahydrofuran, and the by-products formed are in each case recycled to the process.
    Type: Grant
    Filed: November 14, 1975
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Josef Broecker, Matthias Schwarzmann