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:
Jun. 28, 1977
Filed:
Aug. 08, 1975
Stone D Cooley, Houston, TX (US);
Robert P Arganbright, Seabrook, TX (US);
William G Bowman, Pasadena, TX (US);
James D Henery, Houston, TX (US);
Petro-Tex Chemical Corporation, Houston, TX (US);
Abstract
An improved process is disclosed wherein 1,4-butanediol is produced from a maleic acid-containing solution in a multistep process comprising esterification of maleic acid at elevated temperature and pressure in the presence of a monohydric alcohol to form dialky esters of maleic acid, hydrogenation of the dialkyl esters to 1,4-butanediol in a two-step hydrogenation process, recovery of the 1,4-butanediol substantially free from other close boiling contaminants in an extraction zone and recovering 1,4-butanediol in high purity from a distillation zone operated at reduced pressure.