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:
Sep. 21, 1982
Filed:
Mar. 20, 1981
Nobuo Isogai, Niigata, JP;
Takashi Okawa, Niigata, JP;
Motoyuki Hosokawa, Niigata, JP;
Toshiyasu Watanabe, Niigata, JP;
Natsuko Wakui, Niigata, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
In a process for producing a 3-pentenoic ester which comprises reacting butadiene, carbon monoxide and an alcohol in the presence of a solvent and a catalyst selected from cobalt carbonyl or cobalt carbonyl complex, the improvement which comprises distilling the reaction mixture to remove organic volatile components comprised of the 3-pentenoic ester and the unreacted raw materials and the solvent and contacting the distillation residue with an organic solvent to dissolve and/or disperse the residue in the solvent and contacting the resulting organic solution with an aqueous acid solution to extract any cobalt component from the organic solution with the aqueous acid solution, and separating the aqueous acid solution containing the cobalt component from the organic solution, and neutralizing the aqueous acid solution with an alkaline solution to precipitate a cobalt component is disclosed.