Abstract: The present invention relates to polymeric composition of a first copolymer which includes at least one copolymer having at least one of Mw/Mn less than 2 and Mz/Mw less than 1.8; and a second copolymer having Mw/Mn greater than or equal to 2. The composition can be produced by preparing the first and second copolymers in different reactors and blending them. The blend can also be produced in a single reactor by initiating the reaction to prepare one copolymer, and adding additional reactants, or recycling the reaction mixture, during the reaction to produce the other copolymer.

Abstract: A method is disclosed for improving operation of an electrostatic precipitator. By adding free base amino alcohol to a particle-laden gas being treated by the precipitator, the efficiency of particle removal is significantly enhanced.

Abstract: The use as oil-in-water emulsion breakers of phosphonic acid ester condensate oligomers is disclosed which oligomers are ester condensates of alkyl-1-hydroxy-1, 1-diphosphonic acid having the formula: ##STR1## where R.sub.1 and R.sub.2 each represent a group having the formula C.sub.x H.sub.2x+1, where x is from 6 to 13; Y is ##STR2## M is a water soluble cation such as Na, K or NH.sub.4, and n is 1 or greater.

Abstract: The present invention is directed to a method of stabilizing aqueous solutions containing alkali metal sulfite or bisulfite and a catalyst therefor. The catalyzed sulfites which are of primary concern in the present instance are those which are used to inhibit or control oxygen corrosion in water treatment, particularly boiler water treatment.

Abstract: The present invention is drawn to ethylene polyamines in combination with certain alkanolamines as cold-end additives. More specifically, it has been discovered that if these additives are fed to the moving combustion gases of a combustion system which uses sulfur containing fuel and upstream of cold-end surfaces to be treated, the additive will travel along with the gases as vapor and/or liquid droplets and deposit on the cold-end surfaces. As a result, the amount of sulfuric acid corrosion of metallic cold-end surfaces is reduced.

Abstract: The present invention is drawn to ethylene polyamines in combination with certain alkanolamines as cold-end additives. More specifically, it has been discovered that if these additives are fed to the moving combustion gases of a combustion system which uses sulfur containing fuel and upstream of cold-end surfaces to be treated, the additive will travel along with the gases as vapor and/or liquid droplets and deposit on the cold-end surfaces. As a result, the amount of sulfuric acid corrosion of metallic cold-end surfaces is reduced.

Abstract: A grinding device is disclosed in which material to be ground is fed axially to a rotating plate on which two sets of blades are mounted. A first inner set of slinger blades forces the material outwardly to a second set of grinding blades. The inner edges of the grinding blades are tilted forward of the outer edges thereof in the direction of blade rotation. Also, the grinding blades are adjustably supported on support plates.

Abstract: The present disclosure is directed to oligomeric phosphonic acid derivatives which possess excellent chlorine resistance and acceptable calcium tolerance and which, at substoichiometric amounts, inhibit the formation of scale in aqueous mediums. Additionally, the oligomers have been found to be quite active as dispersants for particulate matter contained in an aqueous medium.

Abstract: The present invention relates to the drainage or dewatering of ore concentrates and more particularly to an improved method for dewatering as by filtration, to produce solids which have a desirably low moisture content and which are readily and easily handled by conventional methods of materials handling. The method employs the use of linear or branched alkyl ethoxylated alcohols as dewatering aids.

Abstract: Phosphonic acid ester condensate oligomers are disclosed which are oligomeric ester condensates of alkyl-1-hydroxy-1,1-diphosphonic acid having the formula: ##STR1## where R.sub.1 and R.sub.2 each represent a group having the formula C.sub.x H.sub.2x+1, where x is from 6 to 13; Y is ##STR2## or hydrogen; M is a water soluble cation such as Na, K or NH.sub.4, and n is 1 or greater. The use of these materials as reverse emulsion breakers is also disclosed, as is a method for their preparation.

Abstract: A method of reducing the amount of corrosion due to sulfuric acid on metal parts at the cold-end of a combustion system and in contact with combustion gases derived from the combustion of sulfur-containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an ethylene polyamine additive.

Abstract: The dissemination of fugitive dust particles into the atmosphere is reduced by treating the particles with an aqueous solution of alkylphenoxy polyethoxy ethanol and copolymer of ethylene oxide and propylene oxide.

Abstract: A composition is disclosed for use in dispersing magnesium sulfite tri-hydrate in an aqueous medium which composition comprises, in combination, an oligomer and a copolymer of a 1-olefin and an unsaturated anhydride.

Abstract: A method and apparatus is described for drying a product to a controlled moisture content. The apparatus comprising a first drying zone for receiving the product, a first regulating means for regulating the temperature within said first zone, a second drying zone for receiving the product from the first zone, a second regulating means for regulating the temperature within the second zone, means for measuring the moisture of the product after the product leaves the second zone, means for measuring the temperature in said first and second zones, means for controlling the second regulating means in response to the measured product moisture and the temperature of the second zone and means for cooperatively controlling the first regulating means in response to the measured product moisture and the temperature of the first zone.

Abstract: A method of reducing the amount of sulfur trioxide condensation on, and therefore the amount of sulfuric acid corrosion of, metal parts at the cold-end of a combustion system and in contact with combustion gases derived from the combustion of sulfur containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an aliphatic, water-soluble alkanolamine additive.

Abstract: A method for evaluating and/or controlling a blast furnace operation is disclosed wherein the carbon content of off-gases is measured at a test point located downstream of the wet scrubber.

Abstract: The present invention relates to the drainage or dewatering of ore concentrates and more particularly to an improved method for dewatering as by filtration, to produce solids which have a desirably low moisture content and which are readily and easily handled by conventional methods of materials handling. The method employs the use of linear or branched alkyl ethoxylated alcohols as dewatering aids.

Abstract: A test coupon, more particularly a deposition test coupon, for measuring the deposition rate of scale on surfaces in contact with a scale-forming medium such as industrial cooling water.

Abstract: This invention is directed to a method of reducing the amount of sulfur trioxide condensation on, and therefore the amount of sulfuric acid corrosion of, metal parts at the cold-end of a combustion system and in contact with combustion gases derived from the combustion of sulfur-containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of sodium metasilicate.

Abstract: The present disclosure is directed to a process of separating oil from oil-containing wastewater which comprises treating the wastewater with a water-soluble cationic polymer obtained by the polymerization of an epihalohydrin with an alkylene polyamine having the formula ##STR1## wherein R is a lower alkylene having from 2 to about 6 carbon atoms, and R.sub.1 and R.sub.2 are each a lower alkyl of from 1 to about 6 carbon atoms.