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.

Production of N,N-dialklylaminoethyl (meth)acrylates

Abstract: A method and apparatus for preparing a N,N-dialkylaminoalkyl acrylate in a continuous transesterification reaction The reaction involves adding alkyl acrylates such as methacrylate or ethacrylate to a reboiler mechanism and efficiently removing alcohol co-products Because the reaction is continuous, the alkyl acrylates can be added as needed to increase output, decrease output, or fine-tune the reaction dynamics An entrainer is used to form a volatile azeotrope which contains both alcohol and entrainer and which is easily removed from the reboiler mechanism This method reduces the amount of entrainer needed per unit of alkyl acrylate used and eliminates any need to purify the end product from entrainer contamination of the resulting N,N-dialkylaminoalkyl acrylate product

Cleaner for automotive engine cooling system

Abstract: A cleaner to be used preferably in conjunction with conventional glycol-type collants in automotive cooling systems and methods of using same. The present cleaners may be referred to as extended-life cleaners which may be added to the glycol coolant and are co-extensive with the life of said glycol. These cleaners operate to dissolve deposits, minimize corrosion damage, and dissolve organic degradation products, all of which cause heat transfer difficulties. The basic cleaner comprises: A. an aminopolycarboxylic acid B. an α hydroxy acid such as gluconic, tartaric, or citric C. an azole copper protector such as mercaptobenzothiazole (MBT) and a monoaryl triazole such as benzotriazole or tolyltriazole Wherein the above components are combined in a weight ratio ranging from 3:1:1 to 2:1:1. An aqueous concentrate is preferred and in such a concentrate the amount of Deposit Release Agent varies from about 85-15% with a more preferred range being an aqueous concentrate which contains from 50-15% by weight of the Deposit Release Agent. The balance of such concentrate is, of course, water, preferably soft water. The aqueous concentrates above are adjusted with the water-soluble basic material to give a pH of about 7.5-12.6 with a preferred pH 7.5-10.6. In addition to the Deposit Release Agent noted above, the following components are necessary in some of the cleaner formulations of this invention. 1. In order to emulsify in water, an oil-in-water emulsifying agent is utilized, such as Triton CF 10 (Rohm and Haas), an ethoxylated nonylphenol with an average of 9 EtO. 2. a reducing agent to reduce iron from Fe + + + to Fe + + is also present and a preferred reducing agent is thioglycolic acid or one of its soluble alkali metal salts. 3. Also present in some of the cleaner compositions is a polymeric dispersant which may be a water-soluble carboxylic acid polymer, a vinyl addition polymer, or carboxymethyl cellulose. A preferred polymer is the copolymer of styrene maleic anhydride and these polymers have a molecular weight of 1,000 to 1,000,000 and preferably 100,000 or less. 4. As a brightener or film former for solder an aminoalkanol is utilized preferably diethylaminoethanol. Additionally, a minor quantity of antifoams and dyes may be used in an optional manner as indicated.

Oil removal from waste waters

Abstract: A process for the removal of oil and oily organic contaminants from waste waters using magnetite (Fe3O4) is disclosed.

Corrosion Resistance Of Some Downhole Tubing Materials And Inhibitor Effectiveness In Sweet Environments

Abstract: Corrosion resistance of some downhole tubing materials were studied in a recirculating flow loop simulating conditions that induce flow enhanced corrosion. The selected materials included carbon steels (AISI 1018, API X-52), coiled tubing, 0.5% Cr, and 13% Cr (AISI 420) martensitic steel. The X-52 steel showed the worst resistance to both general and localized corrosion while 13 Cr demonstrated the best performance. The corrosion resistance of the other three materials varied with the conditions. Hydrocarbons were found to have an effect on varying the corrosion rates. All of these materials can be protected with a continuous treatment of corrosion inhibitors. However, the inhibitors were found less effective on coiled tubing and 0.5% Cr steel than carbon steels, regardless of applications simulated (batch or continuous). The decreased efficiency is attributed to the enrichment of Cr in the surface film on which inhibitors are less favorably adsorbed. 46 refs.