Nalco Holding Company

About: Nalco Holding Company is a based out in . It is known for research contribution in the topics: Corrosion & Aqueous solution. The organization has 2375 authors who have published 3056 publications receiving 51473 citations.

Oligomer-containing phosphate scale inhibitors

Abstract: Calcium carbonate scale is controlled by treating calcium carbonate containing waters with a predominantly phosphinate containing composition where has as its major ingredient more than 32 mole percent of a phosphinicosuccinic acid oligomer having the probable structural formula . ##STR1## M is H, Na, K, NH4, or mixtures thereof; and m and n are either 0 or a small whole number with proviso that either m or n is a small whole number and the sum of m plus n is greater than 2.

Reducing nitrogen oxides emissions by dual fuel firing of a turbine

Abstract: The invention presented relates to a process for reducing nitrogen oxides emissions from a gas turbine. The process involves forming an emulsion of water and fuel oil and simultaneously combusting the thusly formed emulsion with natural gas in a gas turbine.

Method for dewatering coal tailings using DADMAC/vinyl trialkoxysilane copolymers as a coagulant

Abstract: A method for concentrating coal tailings and for dewatering coal products employing a copolymer of diallyldimethlylammonium halide and a vinyl alkoxysilane, preferably a copolymer of diallyldimethylammonium chloride and vinyltrimethoxysilane as a coagulant. The method for concentrating coal tailings comprises steps of: feeding the coal tailings to a thickener; treating the coal tailings with the coagulant, discharging substantially concentrated tailing; and withdrawing substantially clarified liquid from the thickener. A method for dewatering coal products containing water comprising the steps of: feeding the clean coal containing water to a twin belt filter press; treating said coal with an effective amount of a copolymer coagulant of diallyldimethylammonium halide and vinyl alkoxysilane, preferably diallyldimethylammonium chloride and vinyl trimethoxysilane is also disclosed. The method encompasses removing water from the coal product through the addition of the subject polymer coagulant; removing the dewatered clean coal product from the filter; and withdrawing the recycled water through the filter.

Method of making silica sols containing large particle size silica

Abstract: Method for preparing aqueous stable silica sols containing at least 40 percent by weight of silica in the form of large, discrete, spherical particles having a weight-average particle diameter of from 45 to 100 millimicrons. An aqueous acid silica sol feed is added at a critical maximum feed rate to an aqueous alkaline silica sol containing particles having a weight-average diameter of from about 10 to 30 millimicrons while the aqueous liquid phase thereof is continuously evaporated. The pH of the alkaline sol during the whole of the addition is maintained at a value of at least 7.0.