Abstract: A shuttle is mounted in a passage connecting ducts from injection barrels. An outlet in the passage wall connects to a common sprue channel. The shuttle isolates one duct from the opening at each end of its travel but at no time blocks the opening. The shuttle is preferably a ball and is preferably located in the spigot of a shut-off tap.

Abstract: A ruthenium catalyst of improved performance for the dimerisation and hydrodimerisation of olefinically unsaturated compounds, especially acrylonitrile, is obtained by co-precipitating a ruthenium compound with an aluminium oxide and/or hydroxide.

Abstract: A 1,1'-dialkyl-4,4'-bipyridylium salt is prepared by reacting the corresponding 4,4'-bipyridyl with a diloweralkylsulphate in the presence of a mineral acid.

Abstract: A water-resistant explosive fuse-cord having water-soluble or water-swellable macromolecular material adjacent to textile material surrounding the explosive core.

Abstract: Opaque voided films having a total luminous transmission not exceeding 25% are made from blends of a polyester preferably polyethylene terephthalate, with 3 to 27% of an ethylene or propylene polymer, prepared by dry blending. One end use of the film, as a base for photographic prints is also described.

Abstract: Compounds having the general formula [C.sub.n F.sub.2n.sub.-1 (HF).sub.x ](C.sub.5 H.sub.4 N)O wherein n is an integer from 3 to 20 and x is 0 or 1, the group C.sub.5 H.sub.4 N is a pyridine nucleus and 0 is an oxygen atom covalently attached to a carbon atom of the nucleus.

Abstract: Novel 1-aryl-2-amidoalkylaminoethanol derivatives, processes for their manufacture, pharmaceutical compositions containing them and methods of using them in the treatment of heart diseases. The compounds possess .beta.-adrenergic blocking activity. Representative of the compounds disclosed is 1-phenyl-2-(1,1-dimethyl-2-phenylacetamidoethyl)amino-ethanol.

Abstract: A wound electrical capacitor having a thermoplastic film dielectric spacer with specified thermal shrinkage characteristics and provided with a shrinkable sleeve which contracts during thermal stabilization of the capacitor to expel air and moisture from the capacitor winding to reduce capacitance loss on accelerated life testing.

Abstract: Tobacco substitutes containing alkaline inorganic matter such as to produce a slurry pH of 8.5 to 13, especially sodium carbonate producing a slurry pH of 9 to 10, and blends of such substitutes with tobacco.

Abstract: A process fluid is purified of strongly acidic impurities, preparatory to treatment over a catalyst or over a hydrogen sulphide absorbing material, by contact with one or more alkali metal aluminates, preferably a beta alumi aluminate. Such aluminates have a high capacity for absorbing hydrogen halides. The process fluid is especially a naphtha hydrocarbon to be reacted with steam to give a gas of high methane content.

Abstract: A device for controlling the flow of fine powders in a quantising machine includes a pinch valve in combination with a fluidiser maintaining a constant head of fluidised powder. A weigh bucket having a plurality of compartments is rotatably mountable to allow simultaneous filling and discharge. Means for delivering charges of fine powders to receivers rapidly with low change in quantity of the charge, have a power-tight system from the charge measuring means to the receiver, and means for venting the air from the receiver. Accurate net weighing machines for rapidly weighing and delivering charges of fine powders incorporate some or all of the above features in an integrated system.

Abstract: Compositions for surface treatments to give lower release values comprising 100 parts by weight of a hydroxy-containing diorganopolysiloxane, 1 to 20 parts by weight of an organohydrogenpolysiloxane, 0.05 to less than 20 parts by weight of an aminoalkoxy silicon compound, 1 to 20 parts by weight of an organotin compound and, if desired, up to 10 parts by weight of a non-amino-containing alkoxy silicon compound.

Abstract: An aromatic polymer comprising recurring units having the formula --Ar--Q-- is made by a new process which comprises heating an alkali metal fluoride with an activated halophenol of the formula X--Ar--QH and/or a substantially equimolar mixture of an activated dihalobenzenoid compound of the formula X--Ar--X and a dihydric phenol of the formula HQ--Ar--QH in which formulae Ar and Q are respectively a bivalent aromatic residue and an oxygen or sulphur atom and may vary from unit to unit in the polymer chain and X is a halogen atom, the amount of alkali metal fluoride being such that together with any of the X atoms that are fluorine the total number of fluorine atoms in the reaction system is at least twice the number of --QH groups in the system.

Abstract: Quinoline-2-carboxylic acids having in the 4-position a halogen atom or an optionally substituted hydrocarbyl group attached through an oxygen atom, optionally substituted by a hydrocarbyl group in the 3 position and optionally substituted in any of the 5, 6, 7 and 8 positions by halogen atoms, nitro or cyano groups, or optionally substituted hydrocarbyl groups each attained directly or through an oxygen atom, and containing in the substituents in the 3, 4, 5, 6, 7 and 8 positions a total of at least 3 carbon atoms form complexes with metals, especially copper. These complexes may be extracted by organic solvents from aqueous solutions of metal salts treated with the quinoline-2-carboxylic acids.

Abstract: An olefine polymerisation catalyst includes a solid compound of a transition metal, e.g. titanium trichloride, an organo-compound of a non-transition metal, e.g. aluminium triethyl or diethyl aluminium chloride and a pentavalent phosphorus compound of the typeR.sub.3.sub.-n P(Q)(E--Z--G),e.g.[(CH.sub.3).sub.2 N].sub.2 P(O)N(CH.sub.3)CH.sub.2 CH.sub.2 N(CH.sub.3).sub.2and(CH.sub.3).sub.2 NP(O)[OCH.sub.2 CH.sub.2 N(CH.sub.3).sub.2 ].sub.2The transition metal compound can be ball-milled in the presence of a further compound which can be the specified phosphorus compound or an electron donor compound, e.g., triphenylphosphine oxide. Using catalysts of this type, a combination of high activity and high stereospecificity can be obtained when polymerising an olefine monomer.

Abstract: A method of producing fibre-reinforced thermoplastic materials in which a plurality of rovings are impregnated with a powdered thermoplastic, the thermoplastic is melted and each impregnated roving is consolidated by passing it through a die which includes the step of contacting all the rovings with a common pool of molten polymer.

Abstract: A non-woven web contains bicomponent filaments having a core of polypropylene and a sheath of specified copolyamides, together with polypropylene homofilaments, in which is embedded parallel yarns extending in its lengthwise direction. The yarns are composed of bicomponent filaments having a copolyamide sheath. The combination of properties of the product makes it suitable for use as a primary backing for tufted carpets.

Abstract: In a process for producing methanol from a gaseous hydrocarbon feedstock, such as natural gas, containing more than the stoichiometric ratio of hydrogen to carbon, the hydrocarbon is subjected to steam reforming to give synthesis gas, the synthesis gas is incompletely reacted over a catalyst to give methanol, methanol is removed from the gas, the unreacted gas is treated to remove carbon monoxide or carbon dioxide from it, and the carbon monoxide or carbon dioxide or both is recycled to the methanol synthesis. By this means the concentration of carbon monoxide or carbon dioxide or both in the gas passing over the synthesis catalyst is kept at a higher level, thus increasing the efficiency of the synthesis and wastage of feedstock is avoided. At the same time a useful high-purity by-product hydrogen stream is produced.

Abstract: Producing effect yarns using the false twist principle by varying the twist density in the heater zone to alter the degree of bulk and thus the texture along the length of the finished yarn.

Abstract: A fuse-cord comprising an explosive core and outer layer of elastomeric material formed with external ribs. The invention also includes a method of seismic prospecting using a detonating cord of this construction.