Emulsifier, invert emulsions made from this emulsifier and...

B - Operations – Transporting – 01 – F

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31/23, 134/56

B01F 17/36 (2006.01) B01F 17/00 (2006.01) B01F 17/34 (2006.01) C09K 8/32 (2006.01)

Patent

CA 2024545

Les émulsifiants conformes à l'invention ont pour formule: Image dans laquelle: - A désigne un groupe terminal pour des polyacrylates; - R1 est un groupe oleyl pouvant contenir jusqu'à 20% mol, de groupes stearyl; - R2 est un reste de formule -(C2H4 0)x (C3H6 0)y-CH3; avec 1 compris entre 1 et 3, m compris entre 0,85 et 3,5, n compris entre 0,12 et 0,5, x compris entre 8 et 24 et y compris entre 0,75 et 2,25; ce composé ayant une masse moléculaire comprise entre 3 000 et 10 000. Ces émulsifiants permettent de préparer des émulsions inverses lourdes, sans solides, comprenant une phase de saumure dispersée et une phase d'huile continue, utilisables dans les forages pétroliers.

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