Akzo Nobel N.v.

Nouryon Chemicals International B.v.

Berol Kemi Ab

Akzo Nobel Surface Chemistry Ab

Ingemar Uneback

Margreth Strandberg

Anders Cassel

Kent Bjur

Martin Hellsten

Per-Erik Hellberg

Hans Oskarsson

Albert Van De Berg

Anna Lif

Arkady Stavtsov

Lars-Erik Noord

The present invention relates to the use of a specific group of acylated nitrogen-containing compounds as anti-agglomerants for gas hydrates. The anti-agglomerants are surface active nitrogen-containing compounds with 1-7 nitrogen atoms, which compounds have at least two hydrophobic groups with 6-24 carbon atoms, and where the hydrophobic groups are connected to the remainder of the molecule by an amine moiety or an amide moiety, and which compounds have at least one C2-C5 acyl group; or a salt thereof. 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.

Nitrogen-containing anti-agglomerants 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 a succinic diester polymer which is used in the preparation of water-in-oil macroemulsions. Said polymer, which has an excellent ability to stabilize a water-in-oil macroemulsion, has the formula (I) wherein L is a polyalkenyl group having a number average molecular weight of are poly(alkyleneoxy) chains with a molecular weight of from 500 to 1,200, where each alkyleneoxy group contains 2 or 3 carbon atoms and the number of alkyleneoxy groups being ethyleneoxy groups is at least 50% of the total number of alkyleneoxy groups, and R1 and R2 independently are alkyl groups having of from 1 to 3 carbons atoms. The emulsions of the invention can be used as a diesel fuel, a gasoline fuel, a heating fuel, a dry cleaning liquid, a metalworking fluid or a personal care formulation.

Surface-active polymer and its use in a water-in-oil emulsion

The invention relates to particular orthoester based polymers as well as the use of specific orthoester beased polymers as a demulsifier for water/oil emulsions.

Environmentally friendly water/oil emulsions

Viscose spin bath additive of an amphoteric surfactant

Use of an alkoxylated polyamine surfactant as a viscose spin bath additive

The invention is a method of producing a viscose solution by

Method of producing a viscose solution

Cellulose derivative spinning solutions are provided, having an improved flow rate at comparable cellulose derivative content and pressure drop across the spinning nozzle, or a higher cellulose derivative content at comparable flow rate, comprising a cellulose derivative in solution in a solvent therefor, and a polyethylene glycol soluble in the solution and having an average molecular weight within the range from about 1.1 to about 4.5 million, in an amount to improve flow rate or increase cellulose derivative content; as well as a process for spinning such solutions through a spinning nozzle at improved flow rate or increased cellulose derivative content.

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Ingemar Uneback