Abstract: Stable emulsion are made from hydrocarbon liquids, water and a water-soluble polysaccharide, plus a fatty acid alkanol amide surfactant. These emulsions are readily dispersed in water to form viscous solutions useful in the clarification of waste waters, in paper making operations and in oil service operations.

Abstract: Novel compositions are prepared from (1) amino substituted pyrazine compounds such as pyrazinamine and (2) at least one of (a) a carboxylic acid, (b) carboxylic acid anhydride, (c) carboxylic acid ester or (d) combination thereof, such as tall oil fatty acid, and (3) optionally in the presence of sodium hydride. These novel compositions are useful as oil and gas well corrosion inhibitors.

Abstract: An improved fracturing fluid for use in hydraulic fracturing of subterranean formations and comprising an aqueous fluid containing an effective amount of a guar containing gelling agent, an effective amount of a crosslinking agent to crosslink the gelling agent and a retarding agent for delaying the crosslinking reaction. The crosslinking agent is a rare earth metal containing compound, such as a ceric salt. The retarding agent for the ceric salt comprises a first mixture consisting essentially of about 1 part of a carboxylic acid and from about 1 to 1000 parts of the alkali metal salt of the carboxylic acid. The retarding agent further comprises a second mixture consisting essentially of about 1 part of a hydroxycarboxylic acid and from about 1 to 1000 parts of its alkali metal salt or about 1 part of an aminocarboxylic acid to from about 1 to 1000 parts of its alkali metal salt.

Abstract: A well completion and servicing fluid comprising an aqueous solution of calcium chloride containing a viscosifier and zinc and/or zinc oxide as a weighting agent.

Abstract: Corrrosion inhibiting compositions containing compositions prepared from (1) nitrogen-containing aromatic heterocyclic compound having at least one group of either (a) a carboxylic acid, (b) carboxylic acid ester, (c) carboxylic acid annhydride, (d) carboxylic acid halide, (e) or combination thereof, such as 2-pyridinecarboxylic acid, and (2) an organic fatty amine such as a mixture of C.sub.10 to C.sub.21 fatty amines.

Abstract: Organophilic polymer adducts which are effective fluid loss control additives for oil base well-working fluids are prepared from an anionic or cationic water soluble polymer and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegetable oils, most preferably commercial lecithin. Preferred polymers comprise polysaccharides or derivatives thereof and synthetic polymers.

Abstract: Corrosion inhibitor compositions for metals are disclosed which comprise (a) the product resulting from reacting a vinyl substituted pyrazine such as 2-vinylpyrazine with a primary or secondary amine such as dodecanamine in the presence of a catalyst such as acetic acid and (b) a suitable carrier liquid such as isopropanol. These corrosion inhibitors are particularly useful in the protection of downhole oil and gas well production and drilling equipment.

Abstract: The present invention relates to a method for treating a well bore and the surrounding subterranean formation. A non-reducing sugar is admixed with a polysaccharide polymer and crosslinking agent in aqueous liquids to subsequently initiate viscosity reduction of the crosslinked polymer. The non-reducing sugar provides a means for obtaining time-controlled viscosity reduction at formation temperatures.

Abstract: The recovery of oil or gas from underground porous formations bearing such hydrocarbons is enhanced by using an injection fluid containing a viscosifying amount of a poly(vinylamine) formed in-situ by hydrolysis of a high molecular weight poly(N-vinylamide). The hydrolysis conditions are strongly acidic or highly alkaline and include the elevated temperature of the formation.The poly(N-vinylamide), such as poly(N-vinylformamide), can be made by inverse emulsion polymerization and the high solids emulsion mixed directly with the acidic or basic solutions to form the injection fluid.The process is applicable to enhanced oil recovery using fluids for water-flooding, well completion or workover, and acidifying or fracturing.

Abstract: Oil is recovered from a subsurface reservoir by surfactants. Surfactant flooding is accomplished especially in reservoirs with marked temperature fluctuations or a temperature gradient which are normally problematic since a soluble surfactant effective for oil mobilization does not retain these properties over wide temperature ranges of, e.g., 10.degree. to 100.degree. C. The new process provides a good surfactant effectiveness even at such extreme temporary and/or local temperature fluctuations. A mixture of a carboxymethylated oxethylate and a polyglucosyl sorbitol fatty acid ester is used. The polyglucosyl sorbitols used as fatty acid esters are those with 2 to 20 glucose units. Recovery of oil by such surfactant flooding is useful above all in reservoirs with temporary or local temperature changes.

Abstract: A C-branched zwitterionic surfactant represented by the following formula is disclosed: ##STR1## wherein x and y are numbers, x is less than or equal to y+1, and the sum of x+y in the range of about 7 to about 19, with the provisos that: (1) when the sum of x+y is in the range of about 7 to about 13, x/y is in the range of about 0.3 to about 1.2; and (2) when the sum of x+y is in the range of about 14 to about 19, x/y is in the range of about 0.1 to about 0.7. An enhanced oil recovery method using the foregoing surfactants is also disclosed.

Abstract: There are provided polyisoimides having repeating units of the formula ##STR1## wherein R is selected from the group consisting of ##STR2## wherein Me is --CH.sub.3 and wherein X is ##STR3## The polyisoimides of the present invention are soluble in a variety of solvents, including DMAC, THF and the like.The polyisoimides of the present invention are used to produce cured resins having high strength and temperature characteristics as well as low void contents. Curing is effected by heating the polyisoimides at temperatures ranging from about 200.degree. C. to about 370.degree. C.

Abstract: Energetic dihydroxy-terminated copolyformals which are formed from formalyde and fluorodiol and nitrodiol comonomers where the fluorodiol is HOCH.sub.2 CF.sub.2 CF.sub.2 CF.sub.2 CF.sub.2 CH.sub.2 OH, HOCH.sub.2 CF.sub.2 CF.sub.2 CF.sub.2 CH.sub.2 OH, HOCH.sub.2 CF(CF.sub.3)OCF.sub.2 CF.sub.2 CF.sub.2 CH.sub.2 OH, HOCH.sub.2 CF.sub.2 OCF.sub.2 CF.sub.2 OCF.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 (CF.sub.2).sub.2 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 (CF.sub.2).sub.4 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 (CF.sub.2).sub.8 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 (CF.sub.2).sub.10 CH.sub.2 CH.sub.2 OH, or mixtures thereof, and the nitro diol is HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 OH, HOCH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.

Abstract: The quaternary salts of rigidized 1,3-oxazole compounds of the formula: ##STR1## where R is either H or CH.sub.3 O. The compounds are produced in a modif Robinson-Gabriel synthesis of oxazoles. These dyes are used in solution with non-interfering polar solvents, such as ethanol and H.sub.2 O, to form lasing media useful in dye lasers.

Abstract: There are provided substituted p-phenylene diamines of the formula ##STR1## wherein Ar is phenyl or phenoxyphenyl.

Abstract: The improvement of providing a shearing force to bundles of woodpulp to physically break apart the same into component parts simultaneously with nitration of said woodpulp in a tank containing nitric acid, sulfuric acid, and water.

Abstract: R-Enantiomer of a .DELTA..sup.2 -1,2,4-triazolin-5-one derivatives represented by general formula (I): ##STR1## wherein R.sup.1 represents a fluoroalkyl group having 1 to 2 carbon atoms and R.sup.2 represents a hydrogen atom, a chloroalkyl group having 1 to 4 carbon atoms or an alkoxyalkoxyalkyl group having the total carbon atom numbers of 3 to 6, and a herbicidal composition containing the same.

Abstract: Apparatus and method for control of hazardous particulates such as asbestos during removal of these materials. Asbestos was applied as insulation and wall finish in many buildings before the dangers of particulate asbestos were recognized. A substantially airtight containment is provided around the affected work space. An accessway is provided to allow access for persons tools equipment, and materials. A filtration machine is provided to induce air flow into the work space, desirably at all times during the removal process. Air discharged from the work space through the filtration machine is filtered. All air passages into the work space are filtered to avoid introduction of contamination from the outside. Filtered air passages are provided to sweep the work space to reduce exposure of the workers to the hazardous materials.

Abstract: Dihydroxy-terminated copolyformals formed fromA. formaldehyde andB. a diol comonomer mixture of(1) 1,2-bis(2-hydroxyethyl)-1,2-dicarbadodecaborane(12) and(2) a nitrodiol which is HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 , HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 OH, HOCH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 CH.sub.2 CH.sub.2 OH, HOCH.sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 C(NO.sub.2).sub.2 CH.sub.2 N(NO.sub.2)CH.sub.2 CH.sub.2 OH, or mixtures thereof.

Abstract: This invention relates to extrusion and injection moldable type elastomeric compositions having a viscosity at 200.degree. C. at 0.73 sec.sup.-1 of about 8.times.10.sup.4 to about 8.times.10.sup.6 poises. The compositions used for elastomeric articles include neutralized sulfonated co- and terpolymers of octene-1/ethylene/ENB or sulfonated terpolymers of hexene-1/ethylene/ENB, about 15 to about 200 parts by weight of a non-polar process oil per 100 parts of polymer; about 50 to about 300 parts by weight of a filler per 100 parts of polymer; and a preferential plasticizer at about 1 to about 50 parts by weight per 100 parts of the sulfonated elastomeric polymer. The composition may also include a crystalline polyolefinic thermoplastic at less then about 100 parts per hundred by weight.