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.

Using an antifoulant in a crude oil heating process

Abstract: Inorganic phosphorus-containing acids and salts thereof in small amounts function as antifoulant additives in crude oil systems employed as feedstocks in petroleum refining which are subjected to elevated temperatures of from about 100° to 1500° F. and which are prone to produce fouling material that deposits and accumulates upon the surfaces of petroleum processing equipment, such as heat transfer equipment and the like. Such additives not only inhibit and suppress fouling but also reduce fouling in previously fouled refining systems.

Hardness suppression in urea solutions

Abstract: The tendency of aqueous solutions of area and other NH-containing compositions to force instability of hardness factors has been found to be detrimental to processes and apparatus employing them. The reliability of these processes and apparatus is improved by the inclusion of hardness-suppressing compositions, which preferably include both a water-soluble polymer and a phosphonate. In particular, agricultural and NOx-reducing applications are improved, especially for solutions containing urea hydrolysis products and the salts of them.

High shear mixing of latex polymers

Abstract: Water-in-oil emulsions of water soluble vinyl addition polymers of the type comprising from: A. 30 to 95% by weight of the emulsion of an aqueous phase comprising water and monomer; B. 10 to 50% by weight of the emulsion of a water soluble vinyl addition polymer; C. 5 to 70% by weight of the emulsion of a hydrophobic liquid; D. and 0.1 to 21% by weight of the emulsion of a water-in-oil emulsifying agent; Can be rendered more stable to prolong storage by subjecting the emulsion to high shear mixing prior to polymerization.

Asiatic clam control chemical

Abstract: Asiatic clams can be controlled by treating the waters in which they grow with a composition comprising the combination of a chlorine solution and a bromide salt capable of releasing bromide ions to the chloride solution.

An improved process for the preparation of water soluble polymer dispersion.

Abstract: The present invention is particularly useful in preparing a water soluble polymer dispersion. According to one preferred embodiment of the invention, the dispersion is prepared by polymerizing a water soluble mixture of from about 15 to about 30% percent by weight of a cationic monomer represented by the following general formula (I): where R₁ is either hydrogen or CH₃; R₂ and R₃ are each an alkyl group having 1 to 3 carbon atoms; A₁ is either an oxygen atom or NH; B₁ is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group, and X₁ ⊖ is an anionic counterion, and/or a second cationic monomer represented by the following general formula (II): where R₄ is either hydrogen or CH₃; R₅ and R₆ are each an alkyl group having 1 to 2 carbon atoms; R₇ is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; A₂ is either an oxygen atom or NH; B₂ is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group and X₂ ⊖ is an anionic counterion; and (meth)acrylamide in an aqueous solution of from 17 to about 19 percent by weight of a polyvalent anionic salt.