Abstract:
2,5-dibromoterephthalic acid, an intermediate used for flame retardant applications, is prepared from terephthalic acid, in a single step, by brominating terephthalic acid in chlorosulfonic acid or fluorosulfonic acid, containing sulfur trioxide and employing an iodine catalyst. The reaction is carried out under mild conditions. The products, 2,5-dibrometerephthalic acid, with lesser amounts of terephthalic acid, bromoterephthalic acid, tribromoterephthalic acid, and tetrabromoterephthalic acid, are recoverable either by filtration of the cooled bromination suspension or by distillation of the chlorosulfonic or fluorosulfonic acid solvent and the further hydrolysis of the brominated terephthalic acid product.
Abstract:
The present invention is catalysts that contain oxides or oxide complexes of at least tin, tungsten, vanadium and molybdenum. Optionally, the catalysts may also contain the oxides of iron, nickel, cobalt, zinc, manganese, magnesium or copper. These catalysts are very useful for the oxidation of acrolein to acrylic acid, the oxidation of butadiene to maleic anhydride and other oxidation reactions.
Abstract:
A process for the catalytic oxidation of olefins to unsaturated aldehydes and acids and the ammoxidation of olefins to unsaturated nitriles in which the catalyst comprises a promoted, reduced, antimony oxide-molybdenum oxide-containing catalyst.
Abstract:
Smoke and ash deposit formation in commercial and military jet engines and power plants is minimized by inclusion in the fuel of an additive comprising oil-soluble salts of a transition metal, such as manganese or iron, and an alkaline earth metal. A preferred additive comprises methylcyclopentadienyl manganese tricarbonyl and calcium alkylphenol sulfide in amounts to provide a manganese/calcium weight ratio about 5/1. The calcium salt may be in an alkaline form derived by over-basing with calcium oxide and carbon dioxide.
Abstract:
Novel title esters are oil-soluble products derived from mono-, di-, tri- and higher hydric alcohols and hydroxy aromatic compounds reacted with 4-(C30-C214 alkyl-substituted carbophenoxy) phthalic anhydride or its diacid. Title esters are useful addition agents for lubricants to impart thereto antiwear, anti-rust and dispersancy functions.
Abstract:
In the recovery and purification of acrylonitrile or methacrylonitrile obtained by the ammoxidation of propylene or isobutylene, the aqueous layer of the decanter associated with the column removing HCN from the nitrile is recycled to the quench column wherein the hot gases from the reactor are directly contacted with the aqueous recycle stream.
Abstract:
A mineral oil grease which is resistant to separation by centrifugal force is provided by using as the sole thickening agent either polyethylene having a number average molecular weight of from about 1,500 to about 3,000 or a combination of said polyethylene with a small amount of a lithium higher fatty acid soap.
Abstract:
Novel urethane derivatives of polymethyl biphenyl useful as fungicides and also having insecticidal, miticidal and nematocidal activities are disclosed. These products are prepared by reacting the appropriate alkyl or aryl chloroformate with the appropriate amino polymethylbiphenyl at temperatures of 0 to 35*C. to produce the corresponding urethane derivatives of polymethyl biphenyl.
Abstract:
Novel urethane derivatives of polymethyl biphenyl useful as fungicides and also having insecticidal, miticidal and nematocidal activities are disclosed. These products are prepared by reacting the appropriate alkyl or aryl isocyanate with the hydroxy polymethylbiphenyl at temperatures of 0* to 35*C. to produce the corresponding urethane derivatives of polymethyl biphenyl.