Method for activating hydrogenation catalyst and method for...

Details Method for activating hydrogenation catalyst and method for... Method for activating hydrogenation catalyst and method for...

2007-04-27

2010-11-16

Mayes, Melvin C (Department: 1793)

Chemistry of inorganic compounds

Oxygen or compound thereof

Peroxide

C502S025000

Reexamination Certificate

active

07833510

ABSTRACT:
A method for producing hydrogen peroxide by an anthraquinone process includes the steps of: reducing with hydrogen a working solution containing an organic solvent and anthraquinone in the presence of a hydrogenation catalyst; and activating the hydrogenation catalyst when a hydrogenation selectivity has decreased due to repeated use, wherein the catalyst activation step includes a step of treating the hydrogenation catalyst with a first alkaline aqueous solution of pH 10 or above containing an alkali metal, and then washing the treated hydrogenation catalyst with water or a second alkaline aqueous solution that is more weakly alkaline than the first alkaline aqueous solution so as to set a catalyst soak solution comprising 5 parts by weight of pure water in admixture with 1 part by weight of the activated hydrogenation catalyst to a pH of 8.0 or above.

REFERENCES:
patent: 3214385 (1965-10-01), Kolyer
patent: 3780168 (1973-12-01), Käbisch
patent: 4394302 (1983-07-01), Miller et al.
patent: 6126914 (2000-10-01), Ogasawara et al.
patent: 741444 (1955-12-01), None
patent: 787340 (1957-12-01), None

Affiliated with

Also associated with

Rating

Method for activating hydrogenation catalyst and method 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 Method for activating hydrogenation catalyst and method for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for activating hydrogenation catalyst and method for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4250556