Patent ID: 6586648
Filing Date: 2003-07-01
Classification: B01J,C07C,C07F

Abstract:
A process for producing cyclopentadiene or a derivative thereof by heating at least one compound which is dicyclopentadiene or a derivative thereof represented by formula (1) to produce cyclopentadiene or a derivative thereof represented by formula (2), the process comprising:a first step comprising heating the compound into vapor; a second step comprising maintaining while heating the vapor at a temperature higher than the boiling point of the desired cyclopentadiene or a derivative thereof to thereby condense and remove high boiling components and simultaneously collect residual vapor; and a third step comprising removing low boiling impurities from the collected residual vapor by maintaining while heating the collected vapor at a temperature lower than the boiling point of the desired cyclopentadiene or derivative thereof to thereby condense and collect the cyclopentadiene or derivative thereof without condensing low boiling impurities: Formula (1) wherein a substituent group R represents a hydrogen atom, or a hydrocarbon, amino, carboxyl or ether group;Formula (2) wherein a substituent group R is as defined above.