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:
Dec. 15, 1992
Filed:
Jul. 12, 1991
Isao Kondoh, Naka, JP;
Takashi Okada, Katsuta, JP;
Doryokuro Kakunenryo Kaihatsu Jigyodan, Tokyo, JP;
Abstract
A method of extracting and separating a spent solvent generated in a nuclear fuel cycle and containing a phosphate (TBP) and a higher hydrocarbon (n-dodecane). This method comprises bringing the spent solvent into contact with methanol, thereby causing the spent solvent to be separated into a phase mainly composed of the higher hydrocarbon and a methanol phase containing the phosphate. By drying the phase mainly composed of the higher hydrocarbon at a low temperature, a minor amount of methanol contained in the phase is separated through evaporation to recover the higher hydrocarbon. By drying the methanol phase at a low temperature, methanol is recovered through evaporation and the phosphate remains as a remaining solution. The remaining solution may further be subjected to low-temperature vacuum distillation to separate the solution into the phosphate (TBP) and a deterioration product thereof (DBP).