Fuel and related compositions – Liquid fuels – Silicon containing
Patent
1997-04-03
1999-12-14
Toomer, Cephia D.
Fuel and related compositions
Liquid fuels
Silicon containing
516123, 525477, 528 10, 528 29, 556445, 556456, 556457, C10L 128
Patent
active
060011408
ABSTRACT:
The present invention relates to diesel fuel and lubrication oil defoaming agents, and crude oil demulsifiers, as well as methods for using same. In particular, the defoaming agents and demulsifiers are comprised of copolymers which have structures constituting a backbone of polysiloxane onto which is grafted an organic group. These structures comprise a polymer of the formula MD.sub.x D'.sub.y D".sub.z M, where M is O.sub.0.5 Si(CH.sub.3).sub.3, D is a OSi(CH.sub.3).sub.2, D' is OSi(CH.sub.3)R, D" is OSi(CH.sub.3)R', R is a polyhydric C.sub.6 -C.sub.28 organic group, R' is a phenol derivative or a long chain aliphatic group or polyethers, z is between 0 and 80, x+y+z is between 10-200, x/z is .gtoreq.1, and x/(y+z) is between about 1 and about 5, or formula M'D.sub.a M' where M' is O.sub.0.5 Si(CH.sub.3).sub.2 R, a is between 4-10, and R and D are the same as defined above.
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Grabowski Wojciech
Haubrichs Rolf
Reiskind Andrew S.
Toomer Cephia D.
Welch II Edward K.
Witco Corporation
Witkowski Timothy X.
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