A roll assembly for increasing a surface area of a fluid, in particular for water treatment, including at least one shaft which in each case bears at least one roll, a drive for the at least one shaft, a fluid feed which is arranged above the respective roll and guides the fluid to the respective roll, and a collecting trough for the fluid, the collecting trough being assigned to the respective roll, wherein the roll has two lateral surfaces in the shape of cylinder jackets which are spaced apart in the radial direction, are each in the form of a mesh and project on the bottom side of the roll into the collecting trough.

Described herein is a method for purging paint circuits coated with a non-cured paint with improved cleaning efficiency and a reduced COD (Chemical Oxygen Demand) in the wastewater, where a paint circuit is brought into contact with a waterborne purge cleaner solution including at least one glycolether and which additionally includes at least one water-soluble amine having at least 7 carbon atoms. Also described herein is a waterborne purge cleaner solution with improved cleaning efficiency and reduced VOC (Volatile Organic Compound) content as well as a concentrate for producing the purge cleaner solution.

Described herein is a method for purging paint circuits coated with a non-cured paint with improved cleaning efficiency and a reduced COD (Chemical Oxygen Demand) in the wastewater, where a paint circuit is brought into contact with a waterborne purge cleaner solution including at least one glycolether and which additionally includes at least one water-soluble amine having at least 7 carbon atoms. Also described herein is a waterborne purge cleaner solution with improved cleaning efficiency and reduced VOC (Volatile Organic Compound) content as well as a concentrate for producing the purge cleaner solution.

The present invention is a water treatment agent containing (a) a polyalkylene oxide with a weight average molecular weight of 500,000 or more and (b) an inorganic flocculating agent.

The present invention is a water treatment agent containing (a) a polymeric flocculating agent, (b) an inorganic flocculating agent and (c) a surfactant, wherein the water treatment agent contains (c) in an amount of more than 50 parts by mass and 10,000 parts by mass or less relative to 1,000 parts by mass of (b).

Methods for treating wastewater in conjunction with subterranean operations with a wastewater treatment additive. In some embodiments, the methods include providing wastewater recovered from at least a portion of a subterranean formation, wherein the wastewater includes water and an organic foulant material, and introducing a wastewater treatment additive that includes an alcohol ethoxylate surfactant into the recovered wastewater.

Surfactants capable of releasing and/or dissolving polymers to form water-soluble or water-dispersible polymer solutions are disclosed. In addition, polymer compositions containing a water-in-oil emulsion comprising the surfactant are provided and can be used, for example, in methods of dissolving a polymer. These surfactants and polymer compositions can be used in various industries including for water clarification, papermaking, sewage and industrial water treatment, drilling mud stabilizers, and enhanced oil recovery.

The present invention concerns new cationic quaternary ammonium compounds which exhibit excellent adsorption properties on negatively charged surfaces. These ones can notably be obtained firstly by reacting an internal ketone with a twin-tail amine under reductive amination conditions to obtain a twin tail triamine, then subjecting the twin tail triamine to a quaternization reaction. They can also obtained be obtained by the quaternization reaction of a certain diamine.

The present disclosure provides a process for removing fluoroorganic acidic compounds from an emulsion of fluoroorganic polymer particles, the process comprising the following steps: (i) forming a mixture of a. an emulsion comprising fluoroorganic polymer particles, at least one fluoroorganic acidic compound and at least one protic solvent, with b. at least one alkylamine; (ii) reacting the fluoroorganic acidic compound with the alkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the alkyl amine; (iii) separating the mixture into a first phase comprising the at least one protic solvent and no greater than 80% by weight, preferably no greater than 50% by weight of the total amount of the at least one fluoroorganic acidic compound initially present in the solution in step (i); and a second phase comprising the hydrophobic ionic compound; (iva) removing the first phase from the second phase; and then (va) removing the fluoroorganic polymer particles from the second phase and/or the first phase, or (ivb) removing the fluoroorganic polymer particles from the second phase and/or the first phase, and then (vb) removing the first phase from the second phase.

The present disclosure provides a process for removing fluoroorganic acidic compounds from an emulsion of fluoroorganic polymer particles, the process comprising the following steps: (i) forming a mixture of a. an emulsion comprising fluoroorganic polymer particles, at least one fluoroorganic acidic compound and at least one protic solvent, with b. at least one alkylamine; (ii) reacting the fluoroorganic acidic compound with the alkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the alkyl amine; (iii) separating the mixture into a first phase comprising the at least one protic solvent and no greater than 80% by weight, preferably no greater than 50% by weight of the total amount of the at least one fluoroorganic acidic compound initially present in the solution in step (i); and a second phase comprising the hydrophobic ionic compound; (iva) removing the first phase from the second phase; and then (va) removing the fluoroorganic polymer particles from the second phase and/or the first phase, or (ivb) removing the fluoroorganic polymer particles from the second phase and/or the first phase, and then (vb) removing the first phase from the second phase.