Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2005-10-04
2005-10-04
Shippen, Michael L. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C502S324000, C502S340000
Reexamination Certificate
active
06951966
ABSTRACT:
The orthoalkylation catalyst for phenols of the invention is one produced by calcining a catalyst precursor comprising basic magnesium carbonate (a) and magnesium oxide (b) optionally together with manganese oxalate (c), the basic magnesium carbonate (a) and magnesium oxide (b) being mixed together at a weight ratio ((a)/(b)) of 20/80 to 80/20. The process for producing an orthoalkylated phenol according to the invention comprises performing a vapor phase reaction of a phenol with an alkyl alcohol in the presence of the above orthoalkylation catalyst so that an orthoalkylated phenol is obtained.The invention enables obtaining an orthoalkylation catalyst for phenols which has high activity and high selectivity, has long catalytic life and exhibits more stable catalytic life than those of conventional orthoalkylation catalysts for phenols. Moreover, by virtue of the use of the catalyst capable of exerting these effects, there can be obtained a process for producing an orthoalkylated phenol which ensures prolonged and constant catalyst regeneration cycle.
REFERENCES:
patent: 3968172 (1976-07-01), Ichikawa et al.
patent: 4528407 (1985-07-01), Smith et al.
patent: 4554266 (1985-11-01), Bennett et al.
patent: 4851591 (1989-07-01), Battista et al.
patent: 4900708 (1990-02-01), Bennett et al.
patent: 4933509 (1990-06-01), Warner
patent: 5847237 (1998-12-01), Yago et al.
patent: 426894 (1942-03-01), None
patent: 4621371 (1971-06-01), None
Patent Abstracts of Japan: Publication No. 07265710; Date of Publication Oct. 17, 1995; Title—Orthoalkylation Catalyst of Phenols, Precursor Thereof and Production of Orthoalkylated Phenols Using Catalyst; Inventor—Yago Shunji et al., Applicant—Honshu Chem Ind Co Ltd.
Abstract: Patent No. JP59228940; US Equivalent—4,554,267; Publication Date of U.S. Patent Nov. 19, 1985; Title—Catalyst and Method for Ortho-Alkylation of Hydroxyaromatic Compounds; Inventor—Gregory R. Chambers et al.; Applicant—Gen Electric.
Ekawa Kenji
Higashi Mitsuhiro
Tanaka Masamitsu
Birch & Stewart Kolasch & Birch, LLP
Honshu Chemical Industry Co. Ltd.
Shippen Michael L.
LandOfFree
Orthoalkylation catalyst for phenol and process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Orthoalkylation catalyst for phenol and process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orthoalkylation catalyst for phenol and process for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3464623