Patents by Inventor Herbert Mueller

Herbert Mueller 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).

  • Preparation of alkanediols
    Patent number: 4599466
    Abstract: Very pure alkanediols are prepared by catalytic hydrogenation of an alkynediol in an aqueous medium under a pressure greater than 20 bar and at above 200.degree. C.
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: July 8, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Wolfgang Reiss
  • Preparation of tetrahydrofuran
    Patent number: 4588827
    Abstract: Tetrahydrofuran is prepared from a crude alkaline aqueous solution of butane-1,4-diol, as obtained by reaction of acetylene with aqueous formaldehyde and catylytic hydrogenation of the resulting but-2-yne-1,4-diol solution by a process in which the alkaline solution is first neutralized with sulfuric acid and water is then eliminated in the liquid phase at from 200.degree. to 260.degree. C., under superatmospheric pressure and in the presence of phosphoric acid.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: May 13, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Christof Palm
  • Reducing the content of oligomeric cyclic ethers in polyoxybutylene polyoxyalkylene glycols
    Patent number: 4585592
    Abstract: In polyoxybutylene polyoxyalkylene glycols obtained by copolymerization of tetrahydrofuran with a 1,2-alkylene oxide in the presence of a compound containing reactive hydrogen and under the catalytic action of a bleaching earth, the content of oligomeric cyclic ethers is reduced by distillation under reduced pressure at above 200.degree. C. after first treating the copolymer with oxygen or an oxygen-containing gas (air) at a temperature of from 20.degree. to 110.degree. C.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: April 29, 1986
    Assignee: BASF Aktiengesellschaft
    Inventor: Herbert Mueller
  • Process and apparatus for preparing or reacting alkanolamines
    Patent number: 4567303
    Abstract: In preparing or reacting alkanolamines, especially at high temperatures, the use of substantially nickel-free alloy steels prevents corrosion and discoloration.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: January 28, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenter Boettger, Hans Hammer, Otto Hertel, Gerhard Jeschek, Herbert Mueller, Emil Scharf, Willibald Schoenleben
  • Continuous preparation of polyoxybutylene polyoxyalkylene glycols
    Patent number: 4564671
    Abstract: Polyoxybutylene polyoxyalkylene glycols are prepared by copolymerization of tetrahydrofuran with a 1,2-alkylene oxide in the presence of a compound containing reactive hydrogen, by a continuous process in which the polymerization is carried out in a reactor over a fixed-bed clay catalyst and with recycling of the reaction mixture, and less than 30% by weight, based on the reaction mixture to be recycled, of a mixture of tetrahydrofuran, 1,2-alkylene oxide and a compound containing reactive hydrogen is added to the reaction mixture, which is recycled to the reactor after flowing through the latter.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: January 14, 1986
    Assignee: BASF Aktiengesellschaft
    Inventor: Herbert Mueller
  • Preparation of 3-hydroxytetrahydrofuran
    Patent number: 4539415
    Abstract: A process for the preparation of 3-hydroxytetrahydrofuran by catalytic dehydration of butane-1,2,4-triol, in which a catalyst chosen from the group of the bleaching earths is used and the dehydration is carried out in the presence of not less than 3 moles of water per mole of butane-1,2,4-triol.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: September 3, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Dieter Voges
  • Process for the purifying of polytetramethylene ether glycol or corresponding diester
    Patent number: 4480124
    Abstract: The subject invention relates to a process for purifying polytetramethylene ether glycol or the corresponding diester prepared by cationic polymerization of tetrahydrofuran comprising treating said glycol or diester with hydrogen in the presence of a hydrogen catalyst. The resulting products have a low color number.
    Type: Grant
    Filed: March 11, 1982
    Date of Patent: October 30, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Herbert Mueller
  • Preparation of polycaprolactone
    Patent number: 4464526
    Abstract: Polycaprolactone is prepared by polymerization of .epsilon.-caprolactone by a process wherein a mixture of .epsilon.-caprolactone with a monohydric or polyhydric alcohol is passed, at from 50.degree. to 160.degree. C., over a fixed-bed catalyst comprising essentially anhydrous bleaching earth in the form of moldings.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: August 7, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Herbert Mueller
  • Purification of polytetramethylene ether-glycols
    Patent number: 4460796
    Abstract: Polytetramethylene etherglycols are purified by treating the alkaline catalysts with orthophosphoric acid in an equivalence ratio of from 1.5 to 2.5:3 and then separating off the inorganic salts formed.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: July 17, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Herbert Mueller
  • Production of tertiary amines
    Patent number: 4442306
    Abstract: Tertiary amines are produced by reacting a secondary amine having identical or different substituents, in particular a readily volatile amine, with a primary or secondary monohydric or polyhydric alcohol, in particular a sparingly volatile fatty alcohol, over a copper catalyst formed directly from copper formate under the reaction conditions.
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: April 10, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Hartmut Axel, Arnold Wittwer
  • Depolymerization of polytetramethylene glycol ethers
    Patent number: 4363924
    Abstract: A process for depolymerizing polytetramethylene glycol ethers, wherein the latter are heated at from 90.degree. to 180.degree. C. in the presence of a bleaching earth.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: December 14, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Otto H. Huchler
  • Vulcanization activator
    Patent number: 4277422
    Abstract: A vulcanization activator which comprises a condensation product of ethylenediamine or propylenediamine with a low molecular weight aldehyde.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Gerhard Paulus, Hubert Schoeppl, Emil Scharf
  • Polymerization of tetrahydrofuran to prepare polytetramethylene ether glycols
    Patent number: 4259531
    Abstract: Polytetramethylene ether glycols with molecular weights of from 300 to 4500 are produced by polymerizing tetrahydrofuran with an adduct of antimony pentachloride with carboxylic acids or carboxylic acid esters as the catalyst in the presence of a carboxylic acid anhydride, e.g., acetic anhydride, as the promoter. Esterified, e.g., acetylated, polytetramethylene ether glycols produced are subsequently converted to polytetramethylene ether glycols by saponification or transesterification. The process causes substantially less environmental pollution than do prior art methods, yet it is both economical and flexible.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: March 31, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto H. Huchler, Walter Mesch, Siegfried Winderl, Herbert Mueller, Herwig Hoffmann
  • Polymerization of tetrahydrofuran
    Patent number: 4243799
    Abstract: A process for the preparation of polybutylene glycol carboxylic acid diesters of the formulaR--CO--O--CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 --O).sub.n CO--R.sup.1by polymerizing pretreated tetrahydrofuran in the presence of one or more carboxylic acids and/or carboxylic acid anhydrides and of a polymerization catalyst, especially antimony pentachloride or a bleaching earth containing less than 3% by weight of water, wherein the tetrahydrofuran is treated with a strong mineral acid, an organic sulfonic acid, silica gel and/or a bleaching earth prior to the polymerization.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: January 6, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Otto H. Huchler, Herwig Hoffmann
  • Purification of tetrahydrofuran
    Patent number: 4233228
    Abstract: Tetrahydrofuran is purified by treatment with bleaching earth.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: November 11, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Otto H. Huchler
  • Preparation of 5-diethylaminopentan-2-ol
    Patent number: 4224251
    Abstract: 5-Diethylaminopentan-2-ol is obtained from 1-diethylamino-pent-2-yn-4-ol by hydrogenation, if a nickel catalyst is used in the presence of a basic alkali metal compound or alkaline earth metal compound and the hydrogenation is carried out in the absence of water.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: September 23, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Herbert Toussaint, Arnold Wittwer
  • Manufacture of secondary amines by alkylating ammonia with alcohols
    Patent number: 4207263
    Abstract: A process for the manufacture of secondary amines, especially fatty amines, from alcohols and ammonia over a hydrogenating catalyst in the presence of hydrogen, in which the reaction mixture essentially consists of alcohol and the amine formed, with only little ammonia, the latter being added progressively and the water formed in the reaction being removed progressively.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: June 10, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Herwig Hoffmann, Herbert Mueller, Herbert Toussaint, Arnold Wittwer
  • Manufacture of cyclic ethers
    Patent number: 4203908
    Abstract: Cyclic ethers, especially tetrahydrofuran, are manufactured by dehydrating diols in the liquid phase in the presence of a bleaching earth as the catalyst and of a minor amount of an alkali metal or alkaline earth metal carbonate or bicarbonate.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: May 20, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Otto H. Huchler
  • Manufacture of cyclic ethers
    Patent number: 4196130
    Abstract: Cyclic ethers are manufactured by eliminating water from corresponding diols in the presence of aluminum oxide which has been obtained by precipitating aluminum hydroxide from an alkali metal aluminate solution by means of an acid and calcining the hydroxide at from 300.degree. to 1,000.degree. C.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: April 1, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto H. Huchler, Siegfried Winderl, Herbert Mueller, Herwig Hoffmann
  • Polymerization of tetrahydrofuran
    Patent number: 4189566
    Abstract: A process for the preparation of polybutylene glycol carboxylic acid diesters of the formulaR-CO-O--CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 -O).sub.n CO-R.sup.1by polymerizing pretreated tetrahydrofuran in the presence of one or more carboxylic acids and/or carboxylic acid anhydrides and of a polymerization catalyst, especially antimony pentachloride or a bleaching earth containing less than 3% by weight of water, wherein the tetrahydrofuran is treated with a strong mineral acid, an organic sulfonic acid, silica gel and/or a bleaching earth prior to the polymerization.
    Type: Grant
    Filed: December 29, 1978
    Date of Patent: February 19, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Mueller, Otto H. Huchler, Herwig Hoffmann