Patents by Inventor Daniel Zollinger

Daniel Zollinger 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).

  • Method for the preparation of 4-(heptafluoro-2-propyl) anilines
    Patent number: 10882816
    Abstract: The invention discloses a method for the preparation of substituted 4-(heptafluoro-2-propyl) anilines by reaction of 2-bromoheptafluoropropane with anilines in the presence of sodium dithionite, in a solvent and in the presence of a catalyst.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: January 5, 2021
    Assignee: Lonza Ltd
    Inventors: Florencio Zaragoza Doerwald, Daniel Zollinger
  • Method for the Preparation of 4-(Heptafluoro-2-Propyl) Anilines
    Publication number: 20200262781
    Abstract: The invention discloses a method for the preparation of substituted 4-(heptafluoro-2-propyl) anilines by reaction of 2-bromoheptafluoropropane with anilines in the presence of sodium dithionite, in a solvent and in the presence of a catalyst.
    Type: Application
    Filed: August 7, 2018
    Publication date: August 20, 2020
    Inventors: Florencio Zaragoza Doerwald, Daniel Zollinger
  • Method for preparation of thiophene-2-carbonyl chlorides with oxalyl chloride
    Patent number: 10112921
    Abstract: The invention discloses a method for the preparation of thiophene-2-carbonyl chlorides starting from thiophenes with oxalyl chloride at elevated temperature with short reaction time.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: October 30, 2018
    Assignee: LONZA LTD
    Inventors: Daniel Zollinger, Florencio Zaragoza Doerwald
  • METHOD FOR PREPARATION OF THIOPHENE-2-CARBONYL CHLORIDES WITH OXALYL CHLORIDE
    Publication number: 20180230121
    Abstract: The invention discloses a method for the preparation of thiophene-2-carbonyl chlorides starting from thiophenes with oxalyl chloride at elevated temperature with short reaction time.
    Type: Application
    Filed: November 2, 2016
    Publication date: August 16, 2018
    Inventors: Daniel Zollinger, Florencio Zaragoza Doerwald
  • Process for the synthesis of 3-methyl-pyridine
    Patent number: 9701634
    Abstract: The present invention discloses a process for the synthesis of 3-methyl-pyridine from formaldehyde, paracetaldehyde, ammonia and acetic acid, whereby said compounds are reacted and said process comprises the following parameters: a) a reaction temperature of 260-300° C.; b) a molar ratio of formaldehyde and paraldehyde (calculated as acetaldehyde) of 0.7-1.4 mol/mol: c) an ammonia concentration of 10-20 weight-% d) an acetic acid concentration of 4-20 weight-% e) a paraldehyde (calculated as acetaldehyde) concentration of 0.4-1.6 Mol/kg f) a retention time of 10-30 minutes in case of a continuous reaction and 10-90 minutes in case of a discontinuous reaction; and g) a reaction pressure of 30-130 bar.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: July 11, 2017
    Assignee: LONZA LTD
    Inventors: Detlef Roederer, Daniel Zollinger, Jean-Yves De Riedmatten
  • Process for the synthesis of 3-methyl-pyridine
    Publication number: 20110003997
    Abstract: The present invention discloses a process for the synthesis of 3-methyl-pyridine from formaldehyde, paracetaldehyde, ammonia and acetic acid, whereby said compounds are reacted and said process comprises the following parameters: a) a reaction temperature of 260-300° C.; b) a molar ratio of formaldehyde and paracetaldehyde of 0.7-1-4 Mol/Mol: c) an ammonia concentration of 10-20 weight-% d) an acetic acid concentration of 4-20 weight-% e) a paracetaldehyde concentration of 0.4-1.
    Type: Application
    Filed: June 24, 2010
    Publication date: January 6, 2011
    Inventors: Detlef Roederer, Daniel Zollinger, Jean-Yves De Riedmatten
  • PROCESS FOR THE PREPARATION OF ALKYL 3,3-DIALKOXYPROPIONATES
    Publication number: 20100217031
    Abstract: The present invention relates to a continuous process for preparing alkyl 3,3-dialkoxy-propionates of the formula (RO)2CHCH2CO2R, wherein R is C1-6 alkyl, by reacting ketene with an ortho formate of formula (RO)3CH in the presence of an acidic catalyst, characterized in that the reaction is carried out in a loop reactor.
    Type: Application
    Filed: October 29, 2008
    Publication date: August 26, 2010
    Inventors: Wolfgang Wenger, Cornelia Zur Täschler, Daniel Zollinger