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. 14, 2010
Filed:
Apr. 16, 2009
Yau-ching Tsai, Taipei, TW;
Chih-chung Chou, Taipei, TW;
Chin-hisang Lin, Taipei, TW;
China Petrochemical Development Corporation, Taipei, TW;
Abstract
A system and a method for preparing cycloalkanone are provided. The method includes the steps of: (a) oxidizing cycloalkane to form a mixture containing ketone, alcohol and unreacted cycloalkane; (b) adding to the mixture alkali metal hydroxide or alkali metal carbonate to form a first mixed solution; (c) separating the first mixed solution into a first organic phase solution and a first aqueous phase solution; and (d) extracting the first organic phase solution by water to obtain a second organic phase solution and a second aqueous phase solution; and (e) distilling the second organic phase to separate out cycloalkanone. The method performs phase separation after a mixing step, and then performs water extraction, thereby effectively lowering the contents of the metal salts in the organic phases. Compared with acid-water extraction, the method not only provides better cooling effects but also reduces equipment corrosion, and therefore has the advantage of decreasing the need for sewage treatments.