The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1976
Filed:
Oct. 04, 1974
Billy W Palmer, Longview, TX (US);
David L Bondurant, Longview, TX (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Trimethylolpropane prepared in alkali solution by the condensation of n-butyraldehyde and formaldehyde is purified by extraction of the trimethylolpropane from the process effluent with a first solvent and the subsequent addition of a second solvent to the extract to further reduce the content of water and alkali salts. The first solvent may be recovered from the trimethylolpropane containing mixture by a simple distillation. The remaining mixture of trimethylolpropane and the second solvent may be separated by settling and decanting. In a preferred embodiment isobutanol is the first solvent and xylene is the second solvent.