摘要:
Unleaded aviation fuel compositions having a Motor Octane Number of at least 98, for use in piston driven aircraft comprising triptane and at least one other saturated liquid aliphatic hydrocarbon having from 5 to 10 carbon atoms. The compositions preferably contain triptane, iso-pentane and either one or any combination of iso-octane, toluene and methyl tertiary butyl ether.
摘要:
A method of recovering or increasing the recovery of oil and/or gas from an underground formation involving injecting into the formation, preferably in the form of an aqueous solution, at least one mono alkyl ether of polyethylene glycol in which the alkyl group has 3-5 carbons and the polyethylene glycol contains 3-6 ethylene oxy units e.g. butyl ether of triethylene glycol. Especially preferred are mixtures comprising that and at least one mono alkyl ether of mono or di ethylene glycol e.g. a mixture of butyl triglycol ether, butyl tetraglycol ether, butyl pentaglycol ether and butyl diglycol ether. The method of the invention may be applied to well stimulation treatments such as water blocking, sand consolidation, sandstone acidising and methods of increasing the recovery of oil such as tertiary oil recovery.
摘要:
A process for the production of 1,4-butanediol comprises catalytically hydrogenating a hydrogenatable precursor therefor in contact with hydrogen-containing gas and a hydrogenation catalyst comprising at least one noble metal of Group VIII of the Periodic Table and at least one of rhenium, tungsten and molybdenum deposited on a carbon support, wherein the carbon support has been contacted with an oxidizing agent selected from the group consisting of nitric acid, hydrogen peroxide, sodium hypochlorite, ammonium persulfate and perchloric acid prior to the deposition of the metals. The above oxidized carbon support is also provided.
摘要:
The present invention relates to novel solid state mixed conductor membranes and their use for separating oxygen from oxygen-containing feeds at elevated temperatures. The membranes comprise a multicomponent metallic oxide of substantially cubic perovskite structure, stable in air over the temperature range of 25-950°C, having no connected through porosity wherein the membrane is of a composition represented by the formula [A 1-x A' x ][Co 1-y-z B y B' z ]O 3-δ , where A ≡ Ca, Sr, Ba, and mixtures thereof; A' ≡ La, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and mixtures thereof; B ≡ Fe, Mn, Cr, V, Ti, and mixtures thereof; B' ≡ Cu, Ni, and mixtures thereof; ∼0.0001 ≦ x ≦ ∼0.1; ∼0.002 ≦ y
摘要翻译:本发明涉及新型固态混合导体膜及其在高温下从含氧原料中分离氧的用途。 膜包括基本上立方体的钙钛矿结构的多组分金属氧化物,在空气中在25-950℃的温度范围内是稳定的,没有通过孔隙连接,其中膜是由式ÄA1-xA'xÜÄCo1-y表示的组成 -ZBYB'ZÜO3-δ,其中A IDENTICAL Ca,Sr,Ba及其混合物; A,B,Y,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Th,U及其混合物; B标识Fe,Mn,Cr,V,Ti及其混合物; B'识别Cu,Ni及其混合物; 类似0.0001 = x =类似0.1; 类似0.002 = y <0.05; 类似0.0005 = z =类似0.3; δ由金属的化合价决定。
摘要:
Solid membranes comprising an intimate, gas-impervious, multi-phase mixture of an electronically-conductive material and an oxygen ion-conductive material and/or a mixed metal oxide of a perovskite structure are described. Electrochemical reactor cells and reactors are also described for transporting oxygen from any oxygen-containing gas to any gas that consumes oxygen. The reactor cells generally comprise first and second zones separated by the solid membrane. The reactor cell may further comprise a catalyst in the first zone. Processes described which may be conducted with the disclosed reactor cells and reactors include, for example, the partial oxidation of methane to produce unsaturated compounds or synthesis gas, the partial oxidation of ethane, extraction of oxygen from oxidized gases, ammoxidation of methane, etc. The extraction of oxygen from oxidized gases may be used for flue or exhaust gas clean-up.
摘要:
This invention relates to a treated pillared clay made by the process comprising the steps of:
(A) contacting at least one clay with an effective amount of at least one ammonium ion source to exchange sodium and/or calcium ions in said clay for ammonium ions to provide an ammonium-containing clay, said clay comprising metal oxides and hydroxides and having a lamellar structure with lamellar layers and interlamellar spaces disposed between the lamellar layers and exchangeable sodium and/or calcium ions occupying said interlamellar spaces; (B) contacting said ammonium-containing clay with an effective amount of at least one source of fluorine to replace at least part of the hydroxyl groups in said clay with fluorine to provide a fluorine- and ammonium-containing clay; (C) contacting said fluorine- and ammonium-containing clay with an effective amount of at least one pillaring agent to form a fluorine-containing pillared clay; and (D) contacting said fluorine-containing pillared clay with an effective amount of at least one inorganic acid to impregnate and/or incorporate at least part of said acid on said clay.
This invention also relates to a process for making the foregoing treated pillared clays. This invention also relates to the use of these treated pillared clays as alkylation catalysts.
摘要:
This invention relates to a method of cracking polymers, especially waste hydrocarbon polymers to produce products of lower molecular weight. The process comprises feeding the polymer into a processing chamber or circular-cross section which chamber also has a bed of particulate material maintained in suspension and in toroidal shape by a hot gas introduced into said chamber so that the polymer intermingles with the particulate materials of the bed and is cracked into products of lower molecular weight. The invention is useful for converting polymeric wastes into products of commercial value such as eg waxes, lubricants and monomeric olefins at the same time reducing environmental pollution.
摘要:
Non-sulphurised overbased metal salts of sulphur-free calixarenes having a substituent hydroxyl group or groups available for reaction with metal base and their preparation are claimed. The salts are useful as additives to lubricating oils by reason of their acids neutralisation capability, their detergent and their antioxidant properties.