摘要:
A process for in situ recovery of a tar sand deposit located beneath the earth's surface. A number of boreholes are drilled laterally from subsurface tunnels into the lower portion of the tar sands formation. Initially as a displacing means such as steam is injected into the boreholes, the tar sands become viscous and gravity flow into the bottom of the boreholes. Continuing to apply steam removes the tar sand deposits located in interstitial crevices between the boreholes thereby allowing the steam to flow laterally through these interstitial crevices to nearby boreholes. The steam rises toward the upper portion of the resource formation to create a horizontal heated plane of steam to further remove tar sand deposits located therein.
摘要:
Catalyst compositions which are particularly useful for the preparation of ethylene polymers having a narrow molecular weight distribution are obtained by (1) drying an inorganic oxide having surface hydroxyl groups, e.g., silica, alumina, magnesia, etc., to remove adsorbed water (2) reacting the surface hydroxyl groups with at least a stoichiometric amount of an organometallic compound having at least one alkyl group attached to a Group III metal, e.g., a trialkylaluminum, (3) reacting the thus-treated inorganic oxide with a vanadium halide, such as (a) VOCl.sub.3, VOBr.sub.3, and/or mono-, di-, and/or trihydrocarbyloxy derivatives thereof and/or (b) VCl.sub.4, VBr.sub.4, and/or mono-, di-, tri-, and/or tetrahydrocarbyloxy derivatives thereof, and (4) reacting that reaction product with at least about 0.1 mol, per mol of organometallic compound, of an ether-alcohol corresponding to the formula R"[OCHR'(CH.sub.2).sub.n CHR].sub.m OH, wherein R and R' are independently selected from the group consisting of hydrogen and alkyl groups containing 1 to 18 carbon atoms, R" is a hydrocarbyl group, n has a value of 0 to 16, and m has a value of at least 1.
摘要:
Blow-Out Prevention Apparatus for an oil well comprising a surface casing, a mud return means leading from the casing, a blow-out preventor means attached to the casing, and a mud diverter valve means connected with the casing. The valve means includes a cylindrical sleeve having a diverted-mud inlet end which leads into the casing, a biasing end, and a diverted-mud outlet opening in the side wall of the sleeve. A piston is housed in the sleeve which is slideable back and forth between the ends of the sleeve, and the piston has a mud contact end and a biased end. The valve means additionally comprises a mud diverter conduit leading from the sleeve through the outlet opening, and biasing means for resiliently biasing the piston from the biasing end thereof toward the mud-inlet end of the sleeve until the outlet opening thereof is covered by the piston. The process comprises passing diverted mud from the casing axially into the cylindrical sleeve and subsequently discharging the diverted mud from the sleeve through the outlet opening therein.
摘要:
A method of manufacturing a foamed polyethylene material is disclosed herein, wherein the polyethylene-ethylene product stream from a high pressure polymerization reactor is introduced to an extruder after an intermediate pressure reduction and preferably extruded through a die at a pressure differential of from about 150 to 1,200 psi and preferably 200 to 750 psi. The polyethylene stream to the extruder comprises about 0.1% to 5% wt. ethylene, which acts as a foaming agent during the extrusion.
摘要:
Closed-cell expanded rubber having a uniform cell structure is prepared by partially curing a vulcanizable rubber in the presence of a vulcanizing agent and a blowing agent at a temperature lower than that at which substantial decomposition of the blowing agent occurs and subsequently expanding and completing the cure of the partially cured rubber. If desired, the compositions which are treated in accordance with the invention may contain thermoplastic resins, antioxidants, processing aids, fillers, and other ingredients conventionally used in vulcanizable rubber compositions. According to a preferred embodiment of the invention, the rubber is butyl rubber or a mixture thereof with ethylene-propylene-diene terpolymer.
摘要:
Non-flaming intumescent compositions are obtained by mixing a normally self-extinguishing intumescent agent with a haloorganophosphorus compound, e.g., a phosphate, thiophosphate, phosphonate, phosphonite, phosphinite, phosphite, thiophosphite, tertiary phosphine, phosphine oxide, or phosphine sulfide. Among the preferred haloorganophosphorus compounds are halohydrocarbon phosphates, such as tris(2,3-dibromopropyl)phosphate, tris(2,3dichloropropyl)phosphate, tris(tribromophenyl)phosphate, etc.
摘要:
1. AN INTUMESCENT COMPOSITION COMPRISING AS THE INTUMESCENT AGENT A MIXTURE OF (A) ONE MOLAR PROPORTION OF A SULFATE OF AN AROMATIC AMINE OF THE GROUP CON SISTING OF P-NITROANILINE, O-NITROANILINE, M-NITROANILINE, 3AMINO-1-NITRONAPTHALENE, 4-AMINO-4''-NITRO-BPHENYL, 1,5DIAMINO 4,8-DINITRONAPTHALENE, 2-AMINO-7-NITROFLUORENE, 4-AMINO-2-NITROFURAN, 5-NITROISATOIC ANHYDRIDE, AND 4NITROACETANILIDE AND (B) ABOUT 1-5 MOLAR PROPORTIONS OF A BORON COMPOUND OF THE GROUP CONSISTING OF BORIC ACID, AN ORGANOBORIC ACID, AN ORGANOBORATE, AND AN ORGANOBOROXINE.
摘要:
IN THE BROMINATION OF AN UNSATURATED HYDROCARBON, SUCH AS THE BROMINATION OF 1,5-CYCLOOCTADIENE TO FORM TETRABROMOCYCLOOCTANE, IMPROVED PRODUCT PURITIES AND YIELDS ARE OBTAINED WHEN THE REACTION TAKES PLACE IN A MIXTURE OF SOLVENTS, SUCH AS HEPTANE AND T-BUTYL ALCOHOL.
摘要:
An oil furnace black process wherein a stream of liquid water intersects a liquid stream of feedstock hydrocarbon after streams of both liquids have been injected into a heated carbon black furnace. When the water stream contacts the liquid feedstock stream it is relatively cold in comparison to the temperature of the feedstock. Exothermic reaction of the feedstock with free oxygen present in the furnace is caused by contact with the water, and is characterized by a visible blazing and a substantial increase in temperature beyond the point at which the feedstock and the water are mixed. In the present invention the injection of water into the furnace thus serves a new and different purpose, i.e., in prior processes water has been injected to quench the temperature of a carbon black aerosol within the furnace or beyond it, and the water has thus been injected after formation of the carbon black had been at least substantially completed. In the present case water is injected into the feedstock hydrocarbon at a very early stage after it enters the furnace and instead of a quenching, the injection of water causes a flaming reaction of the feedstock with oxygen and thus promotes the formation of carbon black. The resulting carbon black products are characterized by an elevated iodine adsorption and/or an unusually high electrical conductivity.
摘要:
A solvent-free printing ink vehicle that dries rapidly under the influence of heat alone or heat in conjunction with ultraviolet light, and printing ink compositions containing said vehicle. The printing ink vehicle comprises an ester of a saturated or unsaturated aliphatic alcohol and a C12 to C20 unsaturated fatty acid, a film forming resin, and a metal salt of peroxydiphosphoric acid. Printing ink compositions employing these vehicles can be dried in less than 1 second.