Abstract: Provided is a compound which may be obtained by esterification condensation of components as described herein. The compound may be used as a collector for ore enrichment (flotation), as a corrosion inhibitor, as a viscosity enhancer, emulsifier or stabilizer that is useful for the oil and gas industry, as a clay modifier, as an adhesion promoter, as an antiagglomerant additive, as an additive in haircare products, as a fabric softener, as an antistatic agent in polymers, as a bitumen emulsion additive, as a detergency cationic agent, as a fertilizer additive, as an antiagglomerant for hydrates, as a lubrication or adhesion-promoting additive, for example.

Abstract: The present invention relates to compounds obtainable by esterification condensation of: A/ at least one alkoxylated fatty amine of formula (I), or of the product of partial or complete quaternization of said alkoxylated fatty amine of formula (I): in which R1, AO, B, n, m, s and y are as defined in the description, B/ with at least one dicarboxylic acid, or a derivative thereof, of formula (II) as follows: in which D and RA are as defined in the description, C/ with at least one (alkyl)alkanolamine derivative of formula (III) or of the product of partial or complete quaternization of said (alkyl)alkanolamine derivative of formula (III) as follows: in which A?O, u, u? and R7 are as defined in the description, and D/ with at least one fatty acid of formula (V) as follows: in which R11 is as defined in the description.

Abstract: The invention relates to a process for monitoring the functioning of a liquid-liquid extraction column in which non-mixing liquids L1 and L2 circulate in counter-current.To this end, an ultrasonic signal is emitted at point Pn of the decanter and this ultrasonic signal is detected at Point P'n located at distance H from point Pn and the time t.sub.n taken by this signal to cover distance H is determined; the speed v.sub.2 of propagation of an ultrasonic signal in the liquid medium near point Pn, preferably constituted by pure liquid L2, is also determined, as well as the speed v.sub.1 of propagation of the same ultrasonic signal in the liquid medium near the point P'n, i.e.