Mineral oils: processes and products – Chemical conversion of hydrocarbons – With preliminary treatment of feed
Patent
1986-04-16
1988-01-12
Chaudhuri, Olik
Mineral oils: processes and products
Chemical conversion of hydrocarbons
With preliminary treatment of feed
502 21, 502 38, C10G 6706
Patent
active
047190035
ABSTRACT:
It has been discovered that although a spent dewaxing catalyst based on a shape selective zeolite catalyst can be regenerated to restore its alpha activity, while substantially maintaining the acid site density of the fresh catalyst, the aging rate of that regenerated catalyst applied in multi-cycle dewaxing operations increases from cycle to cycle. In accordance with the invention use of a sorbent guard bed upstream of the dewaxing catalyst bed and regeneration of the dewaxing catalyst, isolated from the sorbent guard bed with recycle of such regenerated dewaxing catalyst, to the multi-cycle dewaxing operation is described. The result is that the increase in aging rate, referred to above is substantially eliminated, which provides predicatability of conditions in second, third and fourth dewaxing cycles.
REFERENCES:
patent: 3055825 (1962-09-01), Buningh et al.
patent: 4028223 (1977-06-01), Hayes et al.
patent: 4282085 (1981-08-01), O'Rear et al.
patent: 4313821 (1982-02-01), Garwood et al.
patent: 4357232 (1982-11-01), Holland
patent: 4358362 (1982-11-01), Smith et al.
patent: 4372839 (1983-02-01), Oleck et al.
Chaudhuri Olik
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Schneller Marina V.
LandOfFree
Process for restoring activity of dewaxing catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for restoring activity of dewaxing catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for restoring activity of dewaxing catalysts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-920024