Abstract: This invention relates to a novel process for recovering catalyst components and, more particularly, to a method for recovering both iodine and noble metal components such as rhodium from tars formed during the preparation of acetic anhydride by the iodine and noble metal catalyzed carbonylation of methyl acetate.

Abstract: The present invention provides polyamide resins useful for forming containers having improved resistance to gas permeability. The containers are formed from a polyamide resin which comprises the reaction product of a diamine containing 2 to about 10 carbon atoms and a diacid component which comprises about 25 to 95 mole percent of a first diacid selected from 1,4-phenylenedioxy diacetic acid, 1,3-phenylenedioxy diacetic acid, 1,2-phenylenedioxy diacetic acid, and mixtures thereof, and about 5 to about 75 mole percent of a naphthalene dicarboxylic acid. The polyamide resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: Disclosed is a process for the preparation of .alpha.-haloacetoacetic esters by the reaction of an alkali metal alkoxide with a 5-halo-4H-1,3-dioxin-4-one compound, the desired product being obtained as an alkali metal salt which may be converted to the corresponding free ester by treating with acid.

Abstract: The present invention provides a novel process for the preparation of styrene, stilbene, and/or substituted derivatives thereof. The process involves the reaction of an aryl sulfonyl chloride with an olefinic compound in the presence of a catalytic amount of a metal catalyst consisting essentially of palladium.

Abstract: A process for separating the .alpha.-tocopherol homologues from the other ester members of a tocopherol homologue mixture. The isolation of the .alpha.-tocopherol homologue is accomplished by selective deacylation of a mixture of tocopheryl esters in the presence of a base catalyst followed by separation of the .alpha.-ester from the other free tocopherols.

Abstract: Disclosed is a process for the preparation of ether-containing chlorides by reacting an ether-alcohol, ether-glycol or ether-polyglycol with a chlorinating agent such as thionyl chloride in the presence of a catalytic amount of a quaternary ammonium salt, the reaction being conducted at a temperature of about 25.degree. C. to about 90.degree. C.

Abstract: This invention relates to a process for the preparation of organic nitriles. More particularly, the invention relates to a process for the preparation of organic nitriles by reacting organic carboxylic acid primary amides with a dehydrating agent in the presence of a catalytic amount of a particular quaternary ammonium salt.

Abstract: The present invention provides an improved process for the purification of crude terephthalic acid which has been produced by the oxidation of para-xylene. The process comprises contacting the crude terephthalic acid with oxygen-containing gas at a temperature of about 190.degree. to 230.degree. C. and a pressure of about 1500 to 3600 kPa in the presence of a solvent comprising an alkanoic acid which is preferably acetic acid. The process further comprises the use of a novel and surprisingly effective catalyst system. The catalyst system comprises cobalt, a bromine source, and pyridine.

Abstract: A process for separating the .alpha.-tocopherol homologues from the other ester members of a tocopherol homologue mixture. The isolation of the .alpha.-tocopherol homologue is accomplished by selective deacylation of a mixture of tocopheryl esters followed by separation of the .alpha.-ester from the other free tocopherols.

Abstract: The present invention provides a process for the preparation of aryl carboxylic acids and derivatives thereof by the carbonylation of diaryliodonium salts. The diaryliodonium salts are reacted with carbon monoxide and water or an alcohol or amine in a base reaction medium having a pK.sub.b greater than about 8.

Abstract: The present invention provides a process for the preparation of monoesters of dicarboxylic acids by the carbonylation of carboxyphenyl-triarylphosphonium salts. The carboxyphenyl-triarylphosphonium salts are reacted with carbon monoxide and an alcohol in a base reaction medium having a pK.sub.b greater than about 8.

Abstract: Disclosed are novel 5-halo-4H-1,3-dioxin-4-ones and their preparation by treating a compound having the formula ##STR1## with X.sub.2 or SO.sub.2 X.sub.2 wherein X is Cl or Br.

Abstract: Disclosed is a process for the recovery of noble metals from a catalyst-tar formed in a process in which acetic anhydride is prepared by carbonylating methyl acetate in the presence of a noble metal containing catalyst such as rhodium, lithium and methyl iodide. The rhodium is recovered from the tar formed in the process by treating the catalyst containing tar with a lower fatty acid at a temperature of at least 100.degree. C. thereby isolating the noble metal which precipitates from the tar.

Abstract: The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 95 mole percent of a first diacid selected from [thiobis(p-phenyleneoxy)]diacetic acid, [sulfonylbis(p-phenyleneoxy)]diacetic acid, and mixtures thereof, and about 5 to about 95 mole percent of naphthalene dicarboxylic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: The hot-melt adhesives of the present invention comprise a blend of at least one propylene/C.sub.4 to C.sub.10 higher 1-olefin copolymer having an acid number of at least 5, a tackifying resin, and a high density, low viscosity polyethylene wax having a melt viscosity of about 5 to 50 cp. at 150.degree. C. This hot-melt adhesive has a novel combination of properties including low melt viscosity and fast setting which meet the requirements necessary for use in rapid bonding or closing in low and high temperature applications.

Abstract: The present invention provides polymer blend compositions which are useful in the formation of containers having improved resistance to gas permeability. The polymer blend compositions comprise about 5 to 50 percent by weight of a first polyester comprising polyglycolic acid and correspondingly about 50 to 95 percent by weight of a second polyester. The second polyester comprises units derived from a diacid component comprising terephthalic acid and units derived from a diol component which preferably comprises ethylene glycol. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: The present invention provides a process for the preparation of aryl carboxylic acids by the carbonylation of diaryliodonium salts. The diaryliodonium salts are reacted with carbon monoxide in the presence of a zero-valent palladium in a hydrocarbon acid reaction medium to prepare the aromatic carboxylic acids.

Abstract: The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 95 mole percent of oxydiacetic acid, and about 5 to about 95 mole percent of naphthalene dicarboxylic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: Disclosed is a process for preparing 2-benzoxazolinones by reacting a 2-nitrophenol compound with carbon monoxide in the presence of a palladium catalyst and a tertiary amine.

Abstract: The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The polyester resin comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises terephthalic acid and oxydiacetic acid. The oxydiacetic acid is present in a concentration of about 5 to 50 mole percent, based upon the total amount of diacid. The polyester resin has an inherent viscosity of about 0.4 to 1.5. A preferred polyester is that derived from ethylene glycol, terephthalic acid, and about 10 to 40 mole percent oxydiacetic acid. The polyesters which are provided by the present invention may be formed into containers in the form of sheet, film, molded articles, such as bottles, and other such structures.