Abstract: Improved injection-molded LLDPE articles, especially those having a wall thickness in the range of about 0.15 mm to as much as 1.5 mm, are prepared using an LLDPE containing a sufficient amount of at least one C.sub.5 -C.sub.12 1-alkene copolymerized with the ethylene to provide a density in the range of 0.91 to 0.945 g/cc, a melt flwo rate in the range of 60 to 200 g/10 minutes, and an I.sub.10 /I.sub.2 ratio of 7.2 to about 18. Articles such as lids and containers are prepared having improved properties.

Abstract: Molecular sieves are used to remove sulfur compounds (e.g., COS and H.sub.2 S) from liquid hydrocarbon streams, particularly liquid propane. During regeneration of the sieves, some of the liquid hydrocarbons remains on the sieves and is lost by vaporization during the purge step and the liquid fill step. This invention reduces the loss by recovery and recycle of the vaporized hydrocarbons in the liquid recovery process.

Abstract: Molecular sieves are used to remove sulfur compounds (e.g., COS and H.sub.2 S) from liquid hydrocarbon streams, particularly liquid propane. During regeneration of the sieves, some of the liquid hydrocarbons remains on the sieves and is lost be vaporization during the purge step and the liquid fill step. This invention reduces the loss by recovery and recycle of the vaporized hydrocarbons in the liquid recovery process.

Abstract: A high pressure stream of natural gas is treated to remove ethane and higher boiling point hydrocarbons and to produce a low pressure stream of pipeline gas and a high pressure stream of pipeline gas. The method comprises the steps of:(a) passing at least a portion of said high pressure stream of natural gas sequentially through:(1) a first heat exchanger where said stream of natural gas is cooled,(2) a Joule-Thompson valve where said stream of natural gas is expanded adiabatically and the temperature and pressure of the stream are each reduced sufficiently to cause ethane and high boiling fluids to condense, and(3) a first gas/liquid separator where a stream of low pressure pipeline gas is separated from condensed fluids;(b) withdrawing the low pressure pipeline gas from said first separator and flowing it through said first heat exchanger, where the gas is warmed, and into a pipeline or other suitable collector; and(c) withdrawing the condensed fluids from said first separator.

Abstract: Aqueous acid compositions are described which comprise (a) hydroxyethylethylenediaminetriacetic acid, and (b) a compatible acid corrosion inhibitor. The compositions are useful in removing iron oxide scale from metal surfaces.

Abstract: The permeability of siliceous or calcareous subterranean formations adjacent a wellbore is increased by contacting the formation with a gelled aqueous acid capable of dissolving mineral constituents in the formation. The gelled aqueous acid compositions comprise (a) aqueous hydrochloric acid, and (b) a readily soluble gelling agent. Component (b) contains a sufficient amount of a polyoxyethylene glycol to gel the acid and enough ammonium-, alkali-, or alkaline earth metal bicarbonate or carbonate to cause rapid dissolution and dispersion of the polyoxyethylene glycol in the aqueous hydrochloric acid.

Abstract: A slurry concentrator is described which is particularly useful in concentrating slurries for use in foam fracturing of subterranean earth formations.

Abstract: Aqueous xanthan gums normally crosslink at a pH greater than about 1.5 in the presence of ferric ions. This phenomenon is undesirable under many conditions of use, such as acidizing treatments of wells, and is inhibited or prevented by adding certain soluble alkanoic and/or alkenoic acids to the system. The alkanoic and alkenoic acids have at least 4 carbon atoms and bear at least 2 alcoholic hydroxyl groups per molecule and can be added as the organic acid per se or as a soluble salt or .gamma.-lactone. Ascorbic acid and erythorbic acid are examples.

Abstract: The method of chemically cleaning acid-soluble, sulfide-containing scale from a metal surface using an aqueous cleaning composition comprising an aqueous non-oxidizing acid having one or more aldehydes dissolved or dispersed therein is improved by generating the aldehyde in situ. An aqueous acid cleaning composition comprising hydrochloric or sulfuric acid and hexamethylene tetramine is a preferred composition.

Abstract: A zone of a subterranean formation penetrated by a well bore is permanently plugged by injecting a liquid resin system containing at least one thermosetting resin and at least one curing agent or catalyst therefor into the formation and injecting into the wellbore following the resin system, a second liquid containing at least one chain stopping compound to react with one component in the resin system to prevent any of the resin system remaining in the well bore from crosslinking to a sufficient crosslink density to form a solid in the wellbore. Preferably, the second liquid also contains a fluid loss additive to minimize loss of the second liquid from the wellbore to the formation. The method permits a zone to be plugged off and abandoned without the need to erect a drilling rig to drill out excess plugging material remaining in the wellbore.

Abstract: A drilling fluid having extremely desirable physical properties which comprises an aqueous solution of a hydroxyalkyl polysaccharide derivative and a water soluble ionic aluminum crosslinking agent, preferably sodium aluminate.

Abstract: Improved fluid loss control is realized in an acidizing treatment of a subterranean formation of the type using foamed acid, particularly in a foamed fracture acidizing type treatment, by injecting a gelled, substantially unfoamed fluid as a pad ahead of the foamed acid. I.

Abstract: Improved fluid loss control is realized in an acidizing treatment of a subterranean formation, of the type wherein a gelled pad fluid is injected ahead of an acidizing fluid, by dissolving an effective amount of an inorganic water soluble metal halide or sulfate salt in the pad fluid and injecting said salt containing pad fluid ahead of the acid.

Abstract: A compound containing an aromatic or .alpha.-carbonyl enediol functional group is effectively employed as a breaker for the gelled aqueous carrier fluid in aqueous epoxy resin slurries of the type suitable for use in emplacing a permeably consolidated particulate mass in communication with a permeable subterranean formation.

Abstract: Novel solid complexes of 2-oxazoline and 2-oxazine polymers and halogens, interhalogens or pseudo-halogens are prepared by contacting a poly-2-oxazoline or poly-2-oxazine whose backbone comprises a plurality of ring-opened units of an oxazoline or oxazine monomer of the general formula ##STR1## wherein R and R.sub.1 -R.sub.4 are each independently hydrogen, alkyl, aralkyl, phenyl or inertly-substituted phenyl and n is zero or one with a halogen, interhalogen or pseudo-halogen. The complexes are soluble in a variety of conventional solvents (e.g., water, methylene chloride, acetonitrile, methanol, tetrahydrofuran and isopropanol).

Abstract: Phenolics are complexed with acylated polyamines to form materials which are essentially water-insoluble. This phenomenon makes acylated polyamines particularly useful in removing phenolics from aqueous waste streams.

Abstract: Bispicolylamines are prepared by reacting (a) cyanopyridine with (b) hydrogen in the presence of a catalytic amount of (c) a palladium on .alpha.-alumina catalyst. The reaction is normally conducted under autogeneous or superatmospheric pressure at a temperature of from about 20.degree. C. to about 75.degree. C. in a lower alkanol (e.g., isopropanol) as the reaction medium.

Abstract: Oil soluble polymers corresponding to the formula ##STR1## are ashless oil dispersants in lubricating oils and fuels. In formulas I and II, R is a saturated or substantially saturated polyolefin having a molecular weight of at least about 250; R.sub.1 is hydrogen or ##STR2## wherein R.sub.2 is hydrogen or alkyl of from 1 to about 18 carbon atoms with at least about 60 percent of the R.sub.1 groups being ##STR3## X is ##STR4## Y is a terminal group; and n is from 2 to about 15.

Abstract: The process of oxidizing organic compounds by dissolving the organic compound in a water-immiscible, inert organic solvent and contacting same with an aqueous hypohalite ion in the presence of a catalytic amount of a quaternary onium salt is improved by employing a primary alkyl ester as the organic solvent. For example, cyclohexylmethylamine is oxidized under mild conditions to a high yield of cyclohexylnitrile by dissolving the amine in ethyl acetate and contacting same with aqueous hypochlorite and in the presence of a catalytic amount of tetra-n-butylammonium chloride.

Abstract: Organic compounds oxidizable by hypohalite ion, such as amines, amides, primary and secondary alcohols, and alkanals are efficiently oxidized in a biphasic mixture comprising:A. a water immiscible, liquid organic phase comprising an organic compound oxidizable by hypohalite ion; withB. an aqueous phase containing hypohalite ion; andC. a catalytic amount of a quaternary ammonium salt and/or a quaternary phosphonium salt.