Akzo Nobel N.v.

Berol Kemi Ab

Berol Nobel Ab

Berol Nobel Stenungsund Ab

Martin Hellsten

Ian Harwigsson

Hans Oskarsson

Bo T Idstrom

Marie Ernstsson

Ingemar Uneback

Anders W Klingberg

Carina Brink

Goran Carlsson

The present invention relates to the use of a specific group of alkoxylated and/or acylated non-quaternary nitrogen-containing compounds as anti-agglomerants for gas hydrates. The invention also relates to a method for inhibiting the agglomeration of gas hydrates in a conduit, and compositions comprising the gas hydrate anti-agglomerant, a corrosion inhibitor and/or a paraffin deposition inhibitor.

Additive for preserving the fluidity of fluids containing gas hydrates

The invention relates to the use of compounds comprising three hydrophobic groups as additives to a stream of crude oil containing carboxylic acids, in particular naphthenic acids, and salt water, to prevent the formation of calcium carboxylates when the fluid is exposed to shear forces. Preferably, the compounds are added to a crude oil/water stream containing organic acids Caions at a point between the well and the pressure reduction valve in the crude oil receiving station. The compounds have the formula (I) wherein hydrophobic groups R, R', and R&#x2033; are, independently, an optionally substituted hydrocarbyl group or an optionally substituted acyl group having 4-22 carbon atoms; X is N, P&#x2550;O or CR&#x2032;&#x2033;, wherein R&#x2032;&#x2033; is H or a C1-C4 alkyl group; Y is C&#x2550;O or CH; a, a&#x2032;, a&#x2033; b, b&#x2032; and b&#x2033; each independently are 0 or 1, the subscript 0-1 meaning that if the subscript is 0, then the group is not present in the molecule, whereas if the subscript is 1, then the group is present in the molecule; n, n&#x2032;, and n&#x2033; are, independently, zero or on average at least 1, and at most 14; the sum of n, n&#x2032;, and n&#x2033; is 0 or on average at least 3, and at most 42; and m, m&#x2032;, and m&#x2033; are, independently, on average 0-6, and the sum of m, m&#x2032;, and m&#x2033; is 0-18. 

Method for preventing the formation of calcium carboxylate deposits in the dewatering process for crude oil/water streams

The present invention relates to the use of a zwitterionic surfactant in combination with an ether sulphate or ether carboxylate surfactant in a water-based system as a drag-reducing agent. The combination has besides a high drag-reducing effect also a low sensitivity to hard water.

Use of a zwitterionic surfactant together with an anionic ether-containing surfactant as a drag-reducing agent

Zwitterionic surfacant together with an anionic ether-containing surfactant as a drag-reducing agent

Use of alkoxylated alkanolamide together with alkoxylated alcohol as a

Alkoxylated alkanolamide together with an ionic surfactant as

Use of a betaine surfactant together with an anionic surfactant as a

Use of an amphoteric surfactant as a friction-reducing agent

Use of an alkoxylated alkanolamide of general formula (I), ##STR1## wherein R is a hydrocarbon group having 7-35 carbon atoms, preferably 9-23 carbon atoms, A is an alkyleneoxy group having 2-4 carbon atoms, and n is 2-20, preferably 3-12, for producing a water-base liquid system with reduced flow resistance between the flowing, water-base liquid system and a solid surface.

Use of alkoxylated alkanolamide as friction-reducing agent

Ethanol fuel and its use as a diesel fuel

A package capable of preventing the formation of foam when being filled with liquid aqueous products, in which at least a part of the inside of the package is coated on the inside with an antifoaming agent which comprises an antifoaming, water-insoluble compound encapsulated in crystalline urea. In the manufacture of the package, the crystalline urea and the antifoaming compound are dissolved in a mixture of water and an organic solvent forming a solution, and applying the solution to at least a part of the inner side of the material forming the package, whereupon the solvent is driven off.

Package capable of preventing foam formation, method of manufacturing

A process and composition are provided for the froth flotation beneficiation of iron minerals from iron ores containing silicate and phosphate minerals, comprising as collectors a combination of a primary amine and a nitrogen compound containing an anionic group selected from methylene carboxylic acid, ethylene phosphoric acid and methylene phosphonic acid.

Process and composition for the froth flotation beneficiation of iron

A froth flotation process in which an amphoteric compound is used as a collector for oxide and salt type minerals. The amphoteric compound has the formula ##STR1## in which R is a hydrocarbon group having 4 to 18 carbon atoms; n is 0 or 1;; p is a number from 0 to 5; and R.sub.1 is a hydrocarbon group having 5 to 18 carbon atoms or the group ##STR2## in which R, n and p have the above mentioned meaning; or a salt thereof.

Growing community of inventors

Odsm.ang.l, Sweden

Martin Hellsten