Abstract:
A relatively nonvolatile, high molecular weight oil soluble corrosion inhibitor carrier produced by adding at least 40 parts by weight of elemental sulfur per 100 parts by weight dialkyl disulfide oil to an amine activated dialkyl disulfide oil which exhibits corrosion inhibition on its own and in combination with conventional oil based corrosion inhibitor additives. Such a carrier is particularly useful in sustaining a liquid film forming phase at bottomhole conditions of high temperature, high pressure gas wells wherein essentially no pretroleum condensate phase exists.
Abstract:
Microspheroidal particles, suitable as fluidized bed catalyst supports, are prepared by incorporating a portion of small, preferably recycled, particles into a slurry of inorganic oxide sol and inorganic particles which is spray dried to form microspheroidal particles.
Abstract:
In the process for the conversion of maleic acid to gamma-butyrolactone. 1.4-butanediol and/or tetrahydrofuran, a feedstream comprising maleic acid is hydrogenated in a first hydrogenation zone to produce a reaction product comprising succinic acid and unreacted hydrogen which is then supplied to a second hydrogenation zone, where succinic acid is converted to 1,4-butanediol, the temper atures of the feedstream comprising maleic acid and the first hydrogenation zone are controlled such that the temperature of mal eic acid in the feedstream and the first hydrogenation zone does not exceed about 130 DEG C, thereby minimizing the corrosive effects of the maleic acid and prolonging reactor life and improving overall process economics.
Abstract:
An apparatus operable on a wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises a hydraulically operated backup shoe (20) for wedging the apparatus at a selected location in the drill hole and a hydraulic motor (32) with a drilling bit (31) connected thereto for rotation by the hydraulic motor. In the improvement of this invention, the hydraulic motor has guide track means (52) to provide positive engagement of the vanes (54) of the rotor (47) with the periphery of the hydraulic motor's rotor cavity and the rotor has conduit means (62) for the communication of fluid between the rear portion of the vanes contacting the periphery of the rotor cavity, during the rotation of the rotor and the rear portion of the vanes within the rotor. A method of sidewall coring with the apparatus is also disclosed.
Abstract:
A relatively nonvolatile, high molecular weight corrosion inhibitor and inhibitor carrier produced by activating a dialkyl disulfide oil by the addition of a relatively high molecular weight aliphatic amine (e.g., a fatty amine, particularly the N-alkyl-1,3-propane diamines) and optionally further increasing the molecular weight by the addition of elemental sulfur, which exhibits corrosion inhibition on its own and in combination with a conventional oil base corrosion inhibitor additive. Such a composition is particularly useful in sustaining a liquid film forming phase at bottomhole conditions for high temperature, high pressure gas wells wherein essentially no petroleum condensate phase exists.
Abstract:
PROBLEM TO BE SOLVED: To obtain a conjugate filament having high nitrile content, excellent in processability and useful for woven or knitted fabric, nonwoven fabric, or the like by including plural specific polymers arranged in core-sheath configuration. SOLUTION: This conjugate filament having high nitrile content comprises two or more kinds of polymers arranged in sheath/core configuration. The sheath polymer is selected from the group consisting of an acrylonitrile olefinic unsaturated polymer composed of 50-95 wt.% acrylonitrile monomer and 5-50 wt.% olefinic unsaturated monomer such as methyl methacrylate, an organic polymer such as a polypropylene and a combination thereof. The sheath component content is 99-1%, preferably 90-10% based on the filament. The core polymer is selected from the group consisting of the above acrylonitrile olefin-based unsaturated polymer, the above organic polymer and a combination thereof, but the core polymer is different in the composition from the sheath polymer. The core component content is 1-99%, preferably 10-90% and is thermally stable.
Abstract:
PROBLEM TO BE SOLVED: To obtain a new ammoxidation catalyst which increases yield of hydrogen cyanide by-product formed during preparation of acrylonitrile while acrylonitrile formation level is kept at substantially the same level. SOLUTION: A catalyst compsn. contg. a compound body of catalyst oxide of iron, bismuth, molybdenum and calcium and characterized by the formula Aa Bb Cc Dd Fee Bif Mo12 Ox (wherein A is at least one of Li, Na, K, Rb and Cs or a mixture thereof; B is at least one of Mg, Mn, Ni, Co, Ag, Pb, Re, Cd and Zn or a mixture thereof; C is at least one of Ce, Cr, Al, Sb, P, Ge, La, Sn, V and W or a mixture thereof; D is at least one of Ca, Sr, Ba or a mixture thereof; and a=0.01-1.0; b and e=1.0-10; c, d and f=0.1-5.0 and x is determined by conditions of atomic values of other existing elements), is provided.
Abstract:
PROBLEM TO BE SOLVED: To obtain a highly purified acetonitrile applicable to chromatography in a few process and a low cost by subjecting crude acetonitrile as a by-product in producing acrylonitrile to distillation and an ion exchange resin treatment. SOLUTION: The objective compound is obtained by distilling crude CH3 CN by using three distilling columns having overhead reflux loops of respectively having a reflux ratio higher than (3:1), (3.4:1) and (6.4:1), in turn, under >=1 atm., to remove HCN and generating a bottom product containing (A) a CH3 CN/ water azeotropic mixture and water, separating the component A to (B) a CH3 CN/water azeotropic mixture having a higher CH3 CN concentration and a bottom product containing water under =1 atm., then generating a CH3 CN/water azeotropic mixture containing substantially whole amount of water derived from the component B, a bottom product containing CH3 CN and heavy organic compounds, and a side stream containing (C) a highly purified CH3 CN, thus purifying the component C by an acidic ion exchange resin.
Abstract:
PROBLEM TO BE SOLVED: To provide a process for recovering and regenerating ammonia contained in an effluent liquid obtained from a reaction zone for producing a corresponding aliphatic nitrile by reacting ammonia and oxygen with a paraffin. SOLUTION: This process for recovering un-reacted ammonia from an effluent liquid of a reaction vessel obtained from a reaction zone thereof used for producing acrylonitrile or methacrylonitrile, includes a process for quenching the effluent liquid from the reaction vessel with an aqueous solution of ammonium phosphate, in which the ratio of ammonium ion to phosphate ion is between approximately 0.7 to 1.3, preferably approximately 0.9 to 1.2.