Diesel fuel and lubricating oil antifoams and methods of use

Details Diesel fuel and lubricating oil antifoams and methods of use Diesel fuel and lubricating oil antifoams and methods of use

C - Chemistry, Metallurgy

08

G

C08G 77/38 (2006.01) B01D 17/04 (2006.01) B01D 19/04 (2006.01) C08F 283/12 (2006.01) C10G 33/04 (2006.01) C10L 1/28 (2006.01) C10M 155/02 (2006.01) C10M 171/00 (2006.01)

Patent

CA 2258708

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 x D'y D"z M, where M is O5Si(CH3)3, D is a OSi(CH3)2, D' is OSi(CH3)R, D" is OSi(CH3)R', R is a polyhydric C6-C28 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 >= 1, and x/(y+z) is between about 1 and about 5, or formula M'D a M' where M' is O5Si(CH3)2R, a is between 4-10, and R and D are the same as defined above.

La présente invention concerne des agents anti-moussants pour carburant diesel et lubrifiants, des désémulsionneurs pour pétrole brut, ainsi que des méthodes de leur utilisation. Les agents anti-moussants sont notamment composés de copolymères dont la structure consiste en un squelette en polysiloxane sur lequel est greffé un groupe organique. Ces structures comprennent un polymère ayant la formule MDxD'yD''zM, où M est O.5Si(CH3)3, D est OSi(CH3)2, D' est OSi(CH3)R, D'' est OSi(CH3)R', R est un groupe polyhydrique organique C6-C28, R' est un dérivé phénolé ou un groupe aliphatique à longue chaîne ou des polyéthers, où z est compris entre 0 et 80, x+y+z est compris entre 10 et 200 x/z est >/= 1, et ou x/(y+z) est compris entre 1 et 5, ou bien la formule M'DaM' où M' est O.5Si(CH3)2R, a est compris entre 4 et 10 et où R et D sont tels qu'ils sont définis ci-dessus.

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