Patents by Inventor Jochen Stangl

Jochen Stangl 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).

  • Process for the treatment of an aqueous mixture comprising a dipolar aprotic compound
    Patent number: 8779210
    Abstract: Processes for the treatment of an aqueous mixture comprising a dipolar aprotic compound, comprise: a) an adsorption step, in which the aqueous mixture is brought into contact with a porous adsorbent, whereby the porous adsorbent is chosen such that the dipolar aprotic compound adsorbs to it more readily than water; b) a desorption step, in which the porous adsorbent is brought into contact with a desorbing agent, whereby a recovery solution is formed comprising the desorbing agent and the dipolar aprotic compound.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: July 15, 2014
    Assignee: DSM IP Assets B.V.
    Inventor: Jochen Stangl
  • PROCESS FOR THE TREATMENT OF AN AQUEOUS MIXTURE COMPRISING A DIPOLAR APROTIC COMPOUND
    Publication number: 20120209032
    Abstract: Processes for the treatment of an aqueous mixture comprising a dipolar aprotic compound, comprise: a) an adsorption step, in which the aqueous mixture is brought into contact with a porous adsorbent, whereby the porous adsorbent is chosen such that the dipolar aprotic compound adsorbs to it more readily than water; b) a desorption step, in which the porous adsorbent is brought into contact with a desorbing agent, whereby a recovery solution is formed comprising the desorbing agent and the dipolar aprotic compound.
    Type: Application
    Filed: April 19, 2012
    Publication date: August 16, 2012
    Applicant: DSM IP ASSETS B.V.
    Inventor: Jochen STANGL
  • Process for the treatment of an aqueous mixture comprising a dipolar aprotic compound
    Patent number: 8183389
    Abstract: The invention relates to a process for the treatment of an aqueous mixture comprising a dipolar aprotic compound, comprising: a) an adsorption step, in which the aqueous mixture is brought into contact with a porous adsorbent, whereby the porous adsorbent is chosen such that the dipolar aprotic compound adsorbs to it more readily than water; b) a desorption step, in which the porous adsorbent is brought into contact with a desorbing agent, whereby a recovery solution is formed comprising the desorbing agent and the dipolar aprotic compound.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: May 22, 2012
    Assignee: DSM IP Assets B.V.
    Inventor: Jochen Stangl
  • Process for the manufacture of hydroxylated isoflavones
    Patent number: 7820836
    Abstract: A process for the preparation of hydroxylated isoflavones by reacting in a Hoesch reaction using an alkanoic acid alkyl ester as solvent a phenol with a phenylacetonitrile to yield a 1,2-diphenyl-ethanone and transforming the ethanone into an isoflavone by well-known methods.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: October 26, 2010
    Assignee: DSM IP Assets B.V.
    Inventors: August Rüttimann, Edith Maria Rüittmann-Wechsler, legal representative, Natalie Christina Rüittmann, legal representative, Pascal Michael Rüittmann, legal representative, Jochen Stangl
  • Process for the Manufacture of Hydroxylated Isoflavones
    Publication number: 20090287001
    Abstract: A process for the preparation of hydroxylated isoflavones by reacting in a Hoesch reaction using an alkanoic acid alkyl ester as solvent a phenol with a phenylacetonitrile to yield a 1,2-diphenyl-ethanone and transforming the ethanone into an isoflavone by well-known methods.
    Type: Application
    Filed: April 10, 2006
    Publication date: November 19, 2009
    Inventors: August Rüttimann, Edith Maria Rüitmann-Wechsir, Natalie Christina Rüittmann, Arlesheim Rüittmann, Jochen Stangl
  • Process for the preparation of an epoxy compound and an aldehyde
    Publication number: 20090287006
    Abstract: The invention relates to a process comprising a condensation step wherein a starting aldehyde or ketone is made to react with an ester of an ?-haloacid to form an epoxy compound, whereby the reaction is carried out in the presence of a dipolar aprotic compound selected from the group consisting of 1-methyl-2-pyrrolidone (NMP), hexamethylphosphorous triamide (HMPT), dimethylsulfoxide (DMSO), and urea derivatives of the following formula: (III) wherein R1, R2, R3 and R4 may each independently be H or a C1-C4 alkyl group and whereby R2 and R3 may together form a heterocyclic group.
    Type: Application
    Filed: September 13, 2006
    Publication date: November 19, 2009
    Inventors: Jochen Stangl, Claude Stritt
  • PROCESS FOR THE TREATMENT OF AN AQUEOUS MIXTURE COMPRISING A DIPOLAR APROTIC COMPOUND
    Publication number: 20090076285
    Abstract: The invention relates to a process for the treatment of an aqueous mixture comprising a dipolar aprotic compound, comprising: a) an adsorption step, in which the aqueous mixture is brought into contact with a porous adsorbent, whereby the porous adsorbent is chosen such that the dipolar aprotic compound adsorbs to it more readily than water; b) a desorption step, in which the porous adsorbent is brought into contact with a desorbing agent, whereby a recovery solution is formed comprising the desorbing agent and the dipolar aprotic compound.
    Type: Application
    Filed: December 20, 2006
    Publication date: March 19, 2009
    Inventor: Jochen Stangl