Patents by Inventor Heinz Meierhofer

Heinz Meierhofer 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 and plant for the manufacture of carboxylic acid ester by means of a reactive distillation
    Patent number: 7329774
    Abstract: Carboxylic acid ester is produced by esterification of carboxylic acid and an alcohol in a catalytic reaction zone of a first column at a pressure not greater than ambient pressure. The resultant sump product is distilled in a reaction zone of a second column at a pressure greater than 1.5 bar to obtain a second liquid sump product containing carboxylic acid ester with an carboxylic acid content of less than 100 ppm by weight at a lower end of the column. Neutralization of the second liquid sump product with a base is not required.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: February 12, 2008
    Assignee: Sulzer Chemtech AG
    Inventors: Laurent Zuber, Oliver Bailer, Stefan Sander, Heinz Meierhofer
  • Method and plant for the manufacture of carboxylic acid ester by means of a reactive distillation
    Publication number: 20060178524
    Abstract: Carboxylic acid ester is produced by esterification of carboxylic acid and an alcohol in a catalytic reaction zone of a first column at a pressure not greater than ambient pressure. The resultant sump product is distilled in a reaction zone of a second column at a pressure greater than 1.5 bar to obtain a second liquid sump product containing carboxylic acid ester with an carboxylic acid content of less than 100 ppm by weight at a lower end of the column. Neutralization of the second liquid sump product with a base is not required.
    Type: Application
    Filed: April 7, 2006
    Publication date: August 10, 2006
    Inventors: Laurent Zuber, Oliver Bailer, Stefan Sander, Heinz Meierhofer