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Title:
METHOD OF PRODUCING 2,6-DIMETHYLNAPHTHALENE
Document Type and Number:
Japanese Patent JP2002128711
Kind Code:
A
Abstract:

To efficiently and selectively produce 2,6-dimethyl-naphthalene by methylating naphthalene or methylnaphthalenes in the presence of a solid acid catalyst.

Naphthalene or 2-methylnaphthalene as a starting substance is allowed to react with a methylating agent, for example, methanol or dimethyl ether in the presence of a zeolite catalyst having pores with a pore size of 5.8-6.8 in the major axis where the reaction temperature is in the range of 300-450°C, the reaction pressure corresponding to the temperature attains 0.2-6.5-fold the critical pressure of the methylating agent namely under the sub-supercritical or supercritical pressure. When the density of the methylating agent is set in the range of 0.02-0.25 g/ml in the reaction system, the selectivity of 2,6-dimethylnaphthalene is increased as given in Figure 2.


Inventors:
SHICHIJO YASUJI
SAKO TAKESHI
Application Number:
JP2000000324360
Publication Date:
May 09, 2002
Filing Date:
October 24, 2000
Export Citation:
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Assignee:
NIPPON STEEL CHEMICAL CO
NAT INST OF ADV IND & TECHNOL
International Classes:
C07C2/86; C07B61/00; C07C15/24; (IPC1-7): C07C2/86; C07C15/24
Domestic Patent References:
JPS63201135A1988-08-19
JPH11322640A1999-11-24
JPH04247045A1992-09-03
JPH04202144A1992-07-22
Attorney, Agent or Firm:
Katsuo Naruse (2 outside)
Katsuo Naruse (2 outside)