Abstract: Treatment fluids and associated methods and systems for demulsifying an emulsified well fluid. An example method includes contacting the emulsified well fluid with a treatment fluid comprising: an aqueous base fluid; an alcohol; a resin alkoxylated oligomer; a polyol; and a polyamine polyether. The emulsified well fluid is separated into an aqueous phase and an oleaginous phase after contact with the treatment fluid.

Abstract: The present invention relates to demulsifying and dehydrating formulations of heavy crude oil based block copolymers amine bifunctionalized with low polydispersities. These formulations can contain solvents whose boiling point is in the range from 35 to 200° C.

Abstract: The present invention relates to demulsifying and dehydrating formulations of heavy crude oil based block copolymers amine bifunctionalized with low polydispersities. These formulations can contain solvents whose boiling point is in the range from 35 to 200° C., preferably: dichloromethane, chloroform, toluene, xylenes, turbosine, naphtha or mixtures thereof.

Abstract: The present invention provides environmentally friendly demulsifiers for the break down of petroleum oil applications. The demulsification formulations of the present invention are biodegradable and are low in toxicity. The demulsifiers include a poly(tetramethylene glycol) and an alkylene glycol copolymer linked to the poly(tetramethylene glycol) by a difunctional coupling agent.

Abstract: A method of clarifying oily waste water comprising adding to the waste water an effective clarifying amount of one or more demulsifiers selected from the group consisting of dendritic polyamines, dendritic polyamidoamines and hyperbranched polyethyleneimines and the reaction products thereof with gluconolactone, alkylene oxides, salts of 3-chloro-2-hydroxypropanesulfonic acid, alkyl halides, benzyl halides and dialkyl sulfates.

Abstract: A mobile apparatus and method for recycling an invert emulsion based drilling fluid, in which the invert emulsion based drilling fluid includes an oleaginous component and an aqueous component. The apparatus includes an emulsion breaking tank, a water treatment tank, a filter press, and hydrocarbon filters. The method includes: mixing said invert emulsion drilling fluid with a emulsion breaker, wherein the emulsion breaker is a mixture of an alkyl glucoside and an alkane sulfonate; and separating the oleaginous component of the invert emulsion drilling fluid from the aqueous component of the invert emulsion drilling fluid. The method preferably utilizes an emulsion breaker that is a combination of an anionic surfactant, a nonionic surfactant and an alkyl polyglycoside surfactant.

Abstract: Resins obtainable from compounds of formula 1 in which the substituents R2 and HNR1 can be in the ortho, meta or para position relative to one another, and R1 has the same meaning as R2, or has the meaning —COR2, where R1 is independent of R2, R2 is C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl, C7-C30-alkylaryl, by the steps, which can be carried out in any order, of A) reaction with an aldehyde of the formula 2 R3—CHO  (2), wherein R3 is H, C1-C30-alkyl, C2-C30-alkenyl, C6-C18-aryl or C7-C30-alkylaryl, and B) alkoxylation with a C2-C4-alkylene oxide in molar excess, such that the resulting alkoxylate has a degree of alkoxylation of from 1 to 100 alkylene oxide units per —NH group, and the resin has a molecular weight of from 250 to 100,000 units, and their use as emulsion breakers.

Abstract: Resins useful in methods of breaking oil-water emulsions. The resins obtained by reacting a compound of formula 1 with an aldehyde and alkoxylating, in any order: wherein X is —NHR1; —COOH; or —CONHR2; and is ortho—, meta— or para— to X and is a radical of —O—R3; —C(O)R4; —OC(O)R5; —NR6R7; wherein R1-R7 values are defined herein.

Abstract: Polymer compositions made by reacting a polyol with an aromatic hydrocarbon containing only a single reactive functionality have been discovered to be useful demulsifiers for crude oil compositions. The aromatic hydrocarbon should have at least one aryl group and only one functionality reactive with a hydroxyl. The polyol may optionally be crosslinked prior to reaction with the aromatic hydrocarbon, and the crosslinking agent may be a diepoxide.

Abstract: A method for preventing or breaking oil and water mixtures comprising adding thereto a branched reaction product of A) at least one linking compound of formula I R1(X)3  (I) wherein each X group is a halogen atom or one X group is a halogen atom and two X groups with two adjacent carbon atoms in the R1 group and an oxygen atom from an epoxy group, and R1 is an alkanetriyl group containing from 3 to 10 carbon atoms; B) at least one compound of formula II and/or formula III R2(OA)nOH  (II) wherein R2 is an aliphatic group containing from 3 to 36 carbon atoms, n is a number of from 0 to 200, and each OA group is independently an ethyleneoxy, 1,2-propyleneoxy, or 1,2-butyleneoxy group.

Abstract: A method for resolving an oil-and-water emulsion is disclosed. The method comprises adding to the emulsion (1) if the emulsion does not contain a desirably high concentration of polyvalent metal cations of at least one part per million by weight, an amount of polyvalent metal cations sufficient to result in the desirably polyvalent metal cation concentration in the emulsion, and (2) an effective demulsifying amount of a combination of a terminating agent that is either a non-emulsifying hydrotrope composition or a coupling agent, and a composition comprising a polydithiocarbamate compound comprising at least two groups represented by the formula --(OR.sup.1).sub.X NHC(:S)SR.sup.2, wherein R.sup.1 represents an alkylene group of 1 to 30 carbon atoms, R.sup.2 represents an alkali or alkaline earth metal group or an ammonium group; and x represents an integer of from 1 to about 250 independently selected for each of such groups such that the total of the integers x is, on average, from 3 to about 250.

Abstract: Polymer compositions made by reacting a polyol with an aromatic hydrocarbon containing only a single reactive functionality have been discovered to be useful demulsifiers for crude oil compositions. The aromatic hydrocarbon should have at least one aryl group and only one functionality reactive with a hydroxyl. The polyol may optionally be crosslinked prior to reaction with the aromatic hydrocarbon, and the crosslinking agent may be a diepoxide.

Abstract: Process is disclosed for the preparation of 4-substituted aryl olefins from 4-substituted aryl iodides. 4-Substituted aryl iodides are contacted with an olefin in an ester solvent in the presence of a catalyst system comprising a palladium compound and a Bronsted base.