PRODUCTION OF AROMATIC HYDROCARBON

Japanese Patent JP3685225

B2

PROBLEM TO BE SOLVED: To achieve high yield for aromatic hydrocarbons by removing only acetylenes from a light hydrocarbon material and then reacting diolefin components between them using a zeolite catalyst having middle pore diameters in the presence of hydrogen.
SOLUTION: A light hydrocarbon material comprising a mixture of 4C and 5C hydrocarbons having a sum of the concentrations of diolefin components, such as butadiene, and acetylene components of 1 to 50wt.% is subjected to hydrogenation treatment using a Pb catalyst and the like in a fixed bed reactor, so that the content of acetylene components is reduced at a level of 0.1 mole % or less. And then, the treated light hydrocarbon material is subjected to a cyclization reaction under conditions wherein a zeolite type catalyst of middle pore diameters having an effective pore diameter of about 5×10-10 to 6.5×10-10m and SiO2/Al2O3 ratio of about 35 to 80, such as a ZSM-5 type catalyst, is used, the reaction temperature is about 450 to 500°C, the reaction pressure is about 4.8 to 5.3kg/cm2, and the treated light hydrocarbon material and 0.5 to 5 mole of hydrogen per mole of diolefins contained therein are fed at a weight time space velocity of about 1.5 to 5hr-1 relative to the amount of the catalyst, to thereby obtain aromatic hydrocarbons in high yield.

Keiichiro Arai

JP21405496A

August 17, 2005

July 26, 1996

Click for automatic bibliography generation  

Sanyo Petrochemical Co., Ltd.

B01J23/44; B01J29/40; B01J29/46; C07B61/00; C07C2/46; C07C2/76; C07C15/02; C10G35/095; C10G65/06; (IPC1-7): C10G35/095; B01J23/44; B01J29/40; B01J29/46; C07C2/46; C07C2/76; C07C15/02; C10G65/06

JP58203920A
JP63190835A

Nozaki Satoya

Previous Patent: PIEZOELECTRIC OSCILLATION GYRO UTILIZING ENERGY CONFINEMENT OSCILLATION MODE

Next Patent: MANUFACTURE OF TAPE FASTENER