Patents Assigned to Haarmann & Reimer GmbH
  • 3-Methyl-aldehydes, processes for their preparation and their use as odorants
    Patent number: 4263459
    Abstract: The invention concerns new 3-methyl-aldehydes of the general formula ##STR1## wherein x is 6 or 7,a process for their preparation and their use as odorants.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: April 21, 1981
    Assignee: Haarmann & Reimer GmbH
    Inventors: Kurt Bauer, Detlef Hagena, Hans-Otto Muller
  • Nitriles with odorant properties
    Patent number: 4193934
    Abstract: Compound of the formula ##STR1## in which n stands for 0 or 1 and, where "n" stands for 0, a double bond is present as indicated by the chain line, andR represents a cyclohexyl radical, or a phenyl radical which may optionally be substituted in the p-position by a lower alkyl radical.The compounds are produced by reaction of methylethyl ketone substituted in the .beta.-position by R with cyanoacetic acid in the presence of a basic catalyst. The compounds are useful as perfumes.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: March 18, 1980
    Assignee: Haarmann & Reimer GmbH
    Inventors: Kurt Bauer, Ulli Harder, Wolfgang Sturm
  • Process for the preparation of 3,4-methylenedioxymandelic acid
    Patent number: 4190583
    Abstract: Process for the preparation of 3,4-methylenedioxymandelic acid, wherein glyoxylic acid is reacted with 1,2-methylenedioxybenzene in a strongly acid medium.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: February 26, 1980
    Assignee: Haarmann & Reimer GmbH
    Inventors: Kurt Bauer, Reiner Molleken
  • Process for the production of 2-alkoxy-4-propen-1-yl-phenols
    Patent number: 4154769
    Abstract: The invention concerns a new process for the production of 2-alkoxy-4-propen-1-yl phenols of the formula ##STR1## in which R represents the methyl or ethyl radical wherein 2-alkoxy phenols of the formula ##STR2## in which R is as defined above, are initially condensed with propionaldehyde in the presence of acid catalysts, and the resulting condensation product is subsequently split by heating in the presence of a basic catalyst to form the phenols of formula I.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: May 15, 1979
    Assignee: Haarmann & Reimer GmbH
    Inventors: Kurt Bauer, Reiner Molleken, Rudolf Hopp
  • Process for the preparation of alkyl ethers
    Patent number: 4153810
    Abstract: Process for the preparation of alkyl aryl ethers by reacting aromatic hydroxy compounds with aliphatic alcohols in the presence of strongly acidic cation exchangers based on synthetic resins using the aromatic hydroxy compound in excess of the aliphatic alcohol.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: May 8, 1979
    Assignee: Haarmann & Reimer GmbH
    Inventors: Rainer Neumann, Hans-Helmut Schwarz, Karl-Heinz Arnold
  • A method of deodorizing
    Patent number: 4110430
    Abstract: The invention concerns a germ-inhibiting, microbicidal or deodorizing composition comprising p-isopropyl- and/or p-tert.butyl-.alpha.-methyl hydrocinnamic alcohol, together with a carrier or diluent.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: August 29, 1978
    Assignee: Haarmann & Reimer GmbH
    Inventors: Rudolf Hopp, Wolfgang Sturm, Fritz Steinfatt
  • Process for the production of anethole
    Patent number: 4026951
    Abstract: The invention relates to a new process for the production of anethole (4-methoxy propen-1-yl benzene), wherein anisole is condensed with propionaldehyde in the presence of an acid catalyst and the resulting condensation product is subsequently split in the presence of an acid at a temperature in the range from 100.degree. to 300.degree. C.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: May 31, 1977
    Assignee: Haarmann & Reimer GmbH
    Inventors: Kurt Bauer, Reiner Molleken
  • Selective extraction of glyoxylic acid from aqueous mixture with glyoxal
    Patent number: 4026929
    Abstract: Glyoxylic acid is selectively extracted from its aqueous mixture with glyoxal by means of aliphatic or cycloaliphatic alcohol containing about 4 to 8 carbon atoms, a ketone containing about 4 to 8 carbon atoms, and an ester of an aliphatic carboxylic acid and aliphatic alcohol each containing up to about 6 carbon atoms, the esters containing a total of about 3 to 8 carbon atoms, allowing the mixture to stratify and separating the solvent layer enriched in glyoxylic acid.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: May 31, 1977
    Assignee: Haarmann & Reimer GmbH
    Inventors: Kurt Bauer, Reiner Molleken, Alfred Krempel
  • 4-Tricyclo[5,2,1,0.sup.2,6 ]decyl-8-butanal
    Patent number: 4014938
    Abstract: The invention concerns the new tricyclic compound, 4-(tricyclo [5.2.1.0.sup.2,6 ] decyl-8)-butanal, a process for its preparation and its use as a perfume.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: March 29, 1977
    Assignee: Haarmann & Reimer GmbH
    Inventor: Theodor Leidig