Rhodia Operations

Rhodia Consumer Specialties Limited

Rhodia UK Limited

Stephanie Edmunds

Chris Jones

Robert Eric Talbot

Gareth Collins

Alan Christopher Fellows

Paul Douglas Gilbert

Douglas Paul Gilbert

Eric Robert Talbot

Manocher Asaadi

Peter Winter

Ruth Elizabeth Bowdery

A method for reducing the effects of biological contamination in a hydrocarbon-containing system comprising the steps of continuously adding a formulation comprising tris(hydroxymethyl)phosphine or a tetrakis(hydroxymethyl)phosphonium salt to the system for one day or more; monitoring the efficacy of the continuous treatment by an assessment of the extent to which there is any effect on the environment that is attributable to metabolic activity of active microbes present in the system; wherein the tris(hydroxymethyl)phosphine or tetrakis(hydroxymethyl)phosphonium salt is added at a concentration of from 1 to 30 ppm based on the total volume of aqueous fluid added to the system, and wherein the formulation is added to the system at a stage to minimize incompatibility with any other chemicals that are added to the aqueous fluid. The treatment disrupts the microbial activity of active microbes in the hydrocarbon-containing system and can prevent or reduce detrimental effects arising from the presence of active microbes in the system.

Treatment method for a hydrocarbon-containing system using a biocide

The current invention relates to a process for stabilising a phosphorus-containing compound aqueous composition, comprising the step of adding to the composition an efficient arsenic stabilizing amount of a compound selected from the group consisting of ammonia, ammonium salt, organic amino acid, peptide and polypeptide; application of the stabilized composition for treating an aqueous system optionally containing or in contact with metal sulphide scale, which method comprises adding to the system, separately or together, an efficient anti-scale amount of a stabilized aqueous composition or for treating a water system to kill or inhibit the growth of micro organisms comprising applying thereto or forming in situ an efficient inhibiting amount of the stabilized aqueous composition.

Stabilized biocidal composition

The present invention provides a method of reducing the pathogen content of sewage sludge comprising (a) adding to the sludge an effective amount of a phosphorous-containing compound and (b) keeping the phosphorous-containing compound in contact with the sludge for a sufficient time to reduce the amount of pathogens present in the sludge by an amount equivalent to a logarithmic reduction of 2 or more.

Treatment of sewage sludges

Treatment of sewage sludge

Pulping liquors used in the bleaching of pulps by hydrogen peroxide, and containing catalase-producing bacteria and/or catalase enzyme are treated with tris (hydroxymethyl) phosphine or a tetrakis (hydroxymethyl) phosphonium salt to kill the bacteria and destroy the enzyme.

Addition of THP or THP+ salt to pulping liquors to destroy catalase and/or catalase producing bacteria

Growing community of inventors

Willenhall, United Kingdom

Stephanie Edmunds