Silicone defoamer to better control hydrocarbon foam and...

Details Silicone defoamer to better control hydrocarbon foam and... Silicone defoamer to better control hydrocarbon foam and...

2004-11-15

2008-09-23

Griffin, Walter D. (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

Reexamination Certificate

active

07427350

ABSTRACT:
It has been discovered that crosslinked polydimethylsiloxane (PDMS) resins are useful defoamers and antifoamers for hydrocarbon-containing liquids, such as delayed coker feedstocks and feedstocks to preflash and atmospheric towers. These PDMS resins are crosslinked with either alkyl polysilicate or siloxane. The crosslinked PDMS resins may be used alone or together with linear PDMS, and are typically blended with a carrier such as kerosene for easier handling. Importantly, the use of crosslinked branched PDMS resins permit less total amount of polysiloxanes to be used, which reduces the silicon carryover in coker products and reduces poisoning of downstream catalysts.

REFERENCES:
patent: 4082690 (1978-04-01), Farminer
patent: 4176047 (1979-11-01), Orrell et al.
patent: 4486336 (1984-12-01), Pape et al.
patent: 4639489 (1987-01-01), Aizawa et al.
patent: 5667669 (1997-09-01), Hart
patent: 5853617 (1998-12-01), Gallagher et al.
patent: 5861453 (1999-01-01), Datz-Siegel et al.
patent: 5908891 (1999-06-01), Fey et al.
patent: 6476095 (2002-11-01), Simendinger, III
patent: 2003/0119917 (2003-06-01), Fey et al.
patent: 0 663 225 (1995-07-01), None
Perry, R.H.; Green, D.W., Perry's Chemical Engineers' Handbook, 1997, McGraw-Hill, 7th Edition, p. 27-9.
L. N. Kremer, “Silicon Contamination of Coker Products,” AIChE 5th International Conference on Refinery Processes, Mar. 12, 2002.
PCT International Search Report for PCT/US2004/039150, Mar. 14, 2005.
L. N. Kremer, et al., “Foam Control Methods in Delayed Cokers,” Petroleum Technology Quarterly, Summer 2002, pp. 65-69.

Affiliated with

Also associated with

Rating

Silicone defoamer to better control hydrocarbon foam and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Silicone defoamer to better control hydrocarbon foam and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silicone defoamer to better control hydrocarbon foam and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3980675