ANIONIC-CATIONIC-NONIONIC SURFACTANT, PRODUCTION AND USE THEREOF
First Claim
1. The anionic-cationic-nonionic surfactant, which is one or more selected from the group consisting of the compound as substantially represented by the formula (I-1), and the compound as substantially represented by the formula (I-2) with the proviso that, at least one N atom contained in the molecular structure thereof bonds to an additional group Rh and an additional group X so as to form into a quaternary ammonium salt/hydroxide group represented by the formula
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Accused Products
Abstract
This invention relates to an anionic-cationic-nonionic surfactant as substantially represented by the formula (I), production and use thereof in tertiary oil recovery. The anionic-cationic-nonionic surfactant of this invention exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present anionic-cationic-nonionic surfactant, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced.
In the formula (I), each group is as defined in the specification.
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20 Claims
- 1. The anionic-cationic-nonionic surfactant, which is one or more selected from the group consisting of the compound as substantially represented by the formula (I-1), and the compound as substantially represented by the formula (I-2) with the proviso that, at least one N atom contained in the molecular structure thereof bonds to an additional group Rh and an additional group X so as to form into a quaternary ammonium salt/hydroxide group represented by the formula
- 4. The anionic-cationic-nonionic surfactant, which is one or more selected from the group consisting of the compound as substantially represented by the formula (I-3), and the compound as substantially represented by the formula (I-4), with the proviso that, at least one N atom contained in the molecular structure thereof bonds to an additional group Rh and an additional group X so as to form into a quaternary ammonium salt/hydroxide group represented by the formula
Specification