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. 29, 2012
Filed:
May. 07, 2009
Takeshi Kawai, Niigata, JP;
Mitsuharu Kitamura, Kurashiki, JP;
Takeshi Kawai, Niigata, JP;
Mitsuharu Kitamura, Kurashiki, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
A method for producing adamantane by performing an isomerization reaction in two stages using endo-tetrahydrodicyclopentadiene and/or exo-tetrahydrodicyclopentadiene as a starting material, wherein in a first-stage isomerization reaction from endo-tetrahydrodicyclopentadiene (tricyclo[5.2.1.0]decane) to exo-tetrahydrodicyclopentadiene (tricyclo[5.2.1.0]decane), an HF catalyst alone or two catalysts of an HF catalyst and a BFcatalyst are used in the absence of a solvent; and in a second-stage isomerization reaction from exo-tetrahydrodicyclopentadiene (tricyclo[5.2.1.0]decane) to adamantane (tricyclo[3.3.1.1]decane), an HF catalyst and a BFcatalyst are used in the absence of a solvent.