Patents by Inventor Heinz Hohenschutz
Heinz Hohenschutz 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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Patent number: 5206433Abstract: Anhydrous or substantially anhydrous formic acid is prepared by hydrolyzing methyl formate in the presence of a formamide and then obtaining the formic acid from the hydrolysis mixture by distillation, by a method in which the hydrolysis is carried out in the presence of 0.5-3 moles, per mole of methyl formate, of a water-soluble formamide of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each alkyl or together form an alkylene group, giving a 5-membered to 7-membered ring, with the proviso that the sum of the carbon atoms in R.sup.1 and R.sup.2 is 5 or 6 and, in the case of an alkylene group, a carbon atom which is not directly bonded to the N atom can be replaced by an oxygen atom.Type: GrantFiled: May 9, 1985Date of Patent: April 27, 1993Assignee: BASF AktiengesellschaftInventors: Heinz Hohenschutz, Johannes E. Schmidt, Hans Kiefer
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Patent number: 4314947Abstract: A process for completing the esterification of aliphatic carboxylic acids of 1 to 8 carbon atoms with aliphatic or cycloaliphatic alcohols of 3 to 10 carbon atoms at the boiling point of the alcohol in a column operated with bottom heating, the lower space of the column being free from fitments, the middle space being provided with a packing and the upper space being provided with a packing or other fitments, in which process the water of esterification is driven off at the top of the column by azeotropic distillation, the starting mixture is fed into the side of the column from 5 to 10 m above the liquid level, the ester formed is taken off as liquid from the column bottom, and the column is operated with flooding such that the liquid level is from 6 to 10 m, with the liquid mixture filling the lower column space, which is free from fitments, and the lower part of the packed layer above the said space.Type: GrantFiled: December 21, 1978Date of Patent: February 9, 1982Assignee: BASF AktiengesellschaftInventors: Heinz Hohenschutz, Josef Gnad, Guenter Dinkhauser, Eberhard Schaefer
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Patent number: 4218568Abstract: Formic acid is prepared by hydrolyzing methyl formate, the hydrolysis being carried out in the presence of from 0.5 to 3.0 moles, per mole of methyl formate, of a base which contains tertiary nitrogen atoms, boils at not less than 180.degree. C. under atmospheric pressure and has a pKa from 4 to 9, N-substituted imidazole derivatives being the preferred bases.Type: GrantFiled: September 26, 1978Date of Patent: August 19, 1980Assignee: BASF AktiengesellschaftInventors: Heinz Hohenschutz, Johannes E. Schmidt, Hans Kiefer
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Patent number: 4217460Abstract: Carboxylic acids of the general formula IR.sup.1 -COOH Iwhere R.sup.1 is hydrogen, methyl, ethyl or vinyl, are isolated from their dilute aqueous solutions by extraction followed by distillation of the mixtures obtained, the extractant used being a secondary amide of the general formula II ##STR1## where R.sup.2 and R.sup.3 are alkyl, cycloalkyl, aryl or aralkyl or conjointly are 1,4- or 1,5-alkylene, in each case of not more than 8 carbon atoms, with the proviso that the sum of the carbon atoms of R.sup.2 and R.sup.3 is from 7 to 14 and that only one of these radicals is aryl, and where R.sup.4 is one of the radicals R.sup.1.Type: GrantFiled: April 6, 1978Date of Patent: August 12, 1980Assignee: BASF AktiengesellschaftInventors: Heinz Hohenschutz, Johannes E. Schmidt, Hans Kiefer
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Patent number: 4198531Abstract: p-alkylphenols are manufactured by continuous reaction of phenol with olefins in the presence of a pulverulent polystyrenesulfonic acid ion exchanger which is suspended in the reaction mixture.Type: GrantFiled: October 14, 1977Date of Patent: April 15, 1980Assignee: BASF AktiengesellschaftInventors: Franz Merger, Max Strohmeyer, Gerhard Sandrock, Heinz Hohenschutz, Ludwig Schroff, Gerhard Nestler
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Patent number: 4173589Abstract: Oxo aldehydes containing iron pentacarbonyl are purified by distilling them in the presence of air.Type: GrantFiled: October 25, 1977Date of Patent: November 6, 1979Assignee: BASF AktiengesellschaftInventors: Heinrich Elliehausen, Heinz Hohenschutz, Max Strohmeyer, Juergen Haug
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Patent number: 4134915Abstract: Formamide is manufactured continuously from methyl formate and gaseous ammonia. The reaction is carried out in a reactor at from 30 to 90.degree. C, from 5 to 20% by volume of the reactor output is drawn off continuously and fed to the formamide working-up stage, and the remainder of the reactor output is cooled, in an external circuit maintained by means of a pump, to from 25 to 60.degree. C and is mixed with the amount of fresh methyl formate required for steady-state operation, after which the appropriate amount of gaseous ammonia is introduced into the stream of liquid through a jet, by the sucking-jet principle, and the stream of liquid is recycled to the reactor.Type: GrantFiled: May 5, 1977Date of Patent: January 16, 1979Assignee: BASF AktiengesellschaftInventors: Heinz Hohenschutz, Max Strohmeyer, Manfred Herr, Hans Kiefer
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Patent number: 4076594Abstract: Formic acid is purified by extractive distillation of its aqueous solutions using a basic extractant, followed by distillation of the bottom mixture first obtained, the extractant used being N-formylmorpholine.Type: GrantFiled: October 4, 1976Date of Patent: February 28, 1978Assignee: BASF AktiengesellschaftInventors: Horst Buelow, Heinz Hohenschutz, Johannes E. Schmidt, Werner Sachsze
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Patent number: 4002539Abstract: A process for isolating carboxylic acids from residues of the oxo reaction which are obtained as residues, on hydroformylation of ethylene or propylene, optionally after removing a part of the aldehydes produced, subsequent hydrogenation, treatment with aqueous alkali metal hydroxide solutions and subsequent distillation, wherein the residues are acidified with strong mineral acids to a pH of from 2-4, the acidified mixture not containing more than 5 parts by weight of water per part by weight of the carboxylic acids contained in the mixture, the organic phase is then separated off and the carboxylic acids are isolated therefrom by distillation at pressures below 150 mbar. The carboxylic acids obtained can be used as solvents or for the manufacture of esters.Type: GrantFiled: September 23, 1974Date of Patent: January 11, 1977Assignee: BASF AktiengesellschaftInventors: Max Strohmeyer, Werner Hagen, Heinz Hohenschutz
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Patent number: 3983010Abstract: Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.Type: GrantFiled: February 6, 1975Date of Patent: September 28, 1976Assignee: BASF AktiengesellschaftInventors: Konrad Rauch, Hans Kiefer, Dieter Hesse, Max Strohmeyer, Heinz Hohenschutz
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Patent number: 3957684Abstract: Solutions of cobalt carbonyl and cobalt carbonyl hydride in organic solvents are prepared by treating aqueous solutions of cobalt salts with carbon monoxide and hydrogen at a temperature of from 50.degree. to 200.degree.C and a pressure of from 50 to 500 atmospheres in the presence of solvents which are sparingly water-miscible or are water-immiscible and which have a content of cobalt carbonyl, cobalt carbonyl hydride or mixtures thereof, the starting materials and the organic solvents being passed cocurrently through a zone in which a turbulent flow is maintained. The improvement includes using n-butanol as solvent. Solutions of cobalt carbonyl and cobalt carbonyl hydride in n-butanol are suitable as catalyst solutions for oxo syntheses.Type: GrantFiled: June 24, 1974Date of Patent: May 18, 1976Assignee: BASF AktiengesellschaftInventors: Max Strohmeyer, Hans Juergen Nienburg, Rudolf Kummer, Heinz Hohenschutz
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Patent number: 3941848Abstract: An improvement in the process for the manufacture of predominantly straight-chain aldehydes by hydroformylation of olefinically unsaturated compounds of 2 to 20 carbon atoms with carbon monoxide and hydrogen in which, in a first stage, aqueous cobalt solutions are treated with carbon monoxide and hydrogen at temperatures of 50.degree. to 200.degree.C and pressures of 100 to 400 atmospheres in the presence of active charcoal, zeolites or basic ion exchangers which are charged with cobalt carbonyl, in a second stage cobalt carbonyl-hydride is extracted from the reaction mixtures thus obtained, at temperatures of 20.degree. to 180.degree.Type: GrantFiled: July 24, 1973Date of Patent: March 2, 1976Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventors: Rudolf Kummer, Hans-Juergen Nienburg, Heinz Hohenschutz, Max Strohmeyer, Theo Teutsch
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Patent number: 3932523Abstract: The formation of an emulsion when working up reaction mixtures containing butyraldehydes and cobalt is avoided by a treatment with gases containing molecular oxygen in an aqueous acid medium at an elevated temperature, at least twice the amount of molecular oxygen stoichiometrically required for the oxidation of the cobalt being used per gram atom of cobalt present in the oxoreaction mixture.Type: GrantFiled: January 20, 1975Date of Patent: January 13, 1976Assignee: BASF AktiengesellschaftInventors: Max Strohmeyer, Helmut Walz, Max Appl, Hans Moell, Horst Kerber, Heinz Hohenschutz