Abstract: The instant invention is directed to a method of recovering oil and/or gas from a subterranean formation which is penetrated by a well bore, and for reducing the concomitant production of reservoir water therefrom comprising injecting into said formation through said well bore an aqueous treating solution or emulsion containing a polyampholyte prepared from:(i) 40 to 90%, by weight, of at least one anionic-containing monomer;(ii) 0.5 to 60%, by weight, of at least one cationic-containing monomer; and(iii) 0 to 59.5%, by weight, of at least one non-ionic monomer.

Abstract: Antimicrobial compounds of the formula: ##STR1## wherein: Hal is bromine or chlorine; andR is halo; mono- or di-substituted mono- or diloweralkylamino wherein the loweralkyl substituents are hydroxy or loweralkanoyloxy; 4-morpholino; thiocyano; mercapto; straight or branched chain C.sub.1-8 alkylthio; mono- or di-substituted loweralkylthio wherein the substituents are hydroxy, amino, loweralkanoylamino, or loweralkoxycarbonyl; arylthio; loweralkylsulfoxy; or loweralkylsulfonyl; andR.sup.1 is C.sub.6-12 alkyl;are useful in various agricultural and industrial applications.

Abstract: The instant invention is directed to a pyrazine compound represented by the formula ##STR1## wherein Z is --NH--, --NHSO.sub.2 --, --NHCO-- or --S--,Ar is a phenyl ring substituted by 1 or 2 substituents selected from the group consisting of halo, lower alkyl, lower alkoxy or nitro, andn is 0 or 1.

Abstract: An osmotic drug (or other beneficial substance) delivery system comprises a compartment with one or more chambers in series formed by an external shell and chamber-dividing walls of a microporous material and successive overlayers of semipermeable membranes completely covering the outer shell of all but one chamber and substantially covering the outer shell of that one chamber, each successive overlayer completely covering all but one more chamber and substantially covering that one more chamber.

Abstract: A method of controlling Corbicula in aqueous systems comprising treating said systems with a cationic polymer. A preferred polymer is a poly (quaternary ammonium) compound having the recurring structure:[DMDAAX.sup..crclbar. ]where DMDAAX.sup..crclbar. is a polymer unit resulting from monomeric dimethyldiallylammonium X.sup..crclbar. ; and X.sup..crclbar. is an anion; said polymer preferably having a weight average molecular weight of from about 200,000 to 400,000.

Abstract: The instant invention is directed to a method of inhibiting the precipitation and deposition of scale in an aqueous system comprising adding an effective amount, preferably at least 0.1 ppm, of a carboxylic functional polyampholyte, or the salt thereof, to said aqueous system.

Abstract: The instant invention is directed to an aqueous drilling fluid comprising an aqueous clay dispersion and a carboxylic functional polyampholyte, or the salt thereof. The instant invention is also directed to the use of the drilling fluid.

Abstract: The instant invention is directed to a method for preventing the formation of scale in sugar evaporation equipment comprising adding to the juice from 0.1 to 200 ppm of a polycarboxylic acid or its salt selected from the group consisting of polymaleic acid, amine adducts of maleic anhydride polymers, phosphonobutane tri-carboxylic acid, phosphinocarboxylic acids and copolymers of acrylic acid and an hydroxylated lower alkyl acrylate.

Abstract: Method of preparing antimicrobial compounds of the formula: ##STR1## comprising the following steps: (1) halogenating allyl halide to form 1,2,3-trihalopropane; (2) dehydrohalogenating the 1,2,3-trihalopropane to form 2,3-dihalo-1-propene;(3) treating the 2,3-dihalo-1-propene with a Grignard reagent of the formula R--MgHal, where R is as defined above, followed by treatment with magnesium, to form 3-(R-substituted)-2-magnesiumhalide)-1-propene;(4) treating the 3-(R-substituted)-2-(magnesiumhalide)-1-propene with cyanogen to form 3-(R-substituted)-2-cyano-1-propene; and(5) brominating the 3-(R-substituted)-2-cyano-1-propene to form the desired product.

Abstract: The instant invention is directed to a magnesium oxide composition, for use in coating silicon steel, having a Citric Acid Activity of 50 to 200 seconds and a particle size of 90 percent finer than 325 mesh prepared from a blend of(a) ground magnesium oxide having a Citric Acid Activity of greater than 200 to 2000 seconds and(b) ground magnesium oxide having a Citric Acid Activity of 40 to 100 seconds.The instant invention is also directed to a process for the production of a magnesium oxide composition, for use in coating silicon steel, having a Citric Acid Activity of 50 to 200 seconds and a particle size of 90 percent finer than 325 mesh, comprising:(a) grinding to a 90 percent finer than 325 mesh(i) 20 to 60 percent by weight of a ground magnesium oxide having a Citric Acid Activity of greater than 200 to 2000 seconds and(ii) 40 to 80 percent by weight of a magnesium oxide having a Citric Acid Activity of 40 to 100 seconds and(b) blending (i) and (ii) together.

Abstract: Antimicrobial compounds of the formula: ##STR1## where R is C.sub.3-12 alkyl, straight or branched chain C.sub.3 -C.sub.8 cycloalkyl; C.sub.3-8 cycloalkylC.sub.1-3 alkyl; or saturated heterocyclic radical selected from the group consisting of pyrrolidinyl, tetrahydrofuranyl, tetrahydrothienyl, isoxazolidinyl, oxazolidinyl, isothiazolidinyl, pyrazolidinyl, imidazolidinyl, piperazinyl, and piperidinyl.

Abstract: Gas mixtures are separated on a two column molecular sieve pressure swing adsorption (PSA) system to produce an enriched gas stream. This process features the use of a product gas purge, an inlet vent gas and feed gas for the repressurization of a regenerated column and does not require vacuum or an air receiver.

Abstract: The instant invention is directed to a process for the production of high molecular weight water-in-oil polymer emulsions of cationic polymers.

Abstract: The instant invention is directed to a process for lowering the electrical resistivity of fly ash comprising adding a cationic or anionic polymer to the fly ash.

Abstract: The instant invention is directed to a process for the inhibition of scale and corrosion formation in an aqueous system, comprising adding to the system about 0.1 to 100 ppm, by weight based on the total aqueous content of said system, of 103 to 115% polyphosphoric acid, or neutral salts thereof.

Abstract: The instant invention is directed to a method for reducing the viscosity of magnesium hydroxide aqueous slurries which comprises adding an effective amount of a cationic polymer to the magnesium hydroxide slurry. The instant invention is also directed to magnesium hydroxide aqueous slurries containing cationic polymer.

Abstract: Photopolymerization of monomers by visible light using a photoreducible dye, a reducing agent and a controlled level of copper ions allows for high molecular weight polymer formation. The molecular weight is found to be proportional to the copper ion concentration. At 10 to 1,000 ppb copper ion concentration, the molecular weight of the polymer is optimum.

Abstract: A method of inhibiting corrosion of low carbon steel in an aqueous system comprising treating said system with 1.0 to 300 parts per million by weight of the total aqueous content of said system, of a composition comprising aminomethylphosphonic acid compounds and polymaleic anhydride or amine adducts thereof in a weight ratio of from 10:1 to 1:10.