The process is disclosed for the manufacture of briquettes in which an essentially solid fuel material such as hard coal, coke, soft coal, charcoal or more particularly, anthracite, and other coals of low volatility are mixed in the presence of polyvinyl alcohol and calcium oxide and/or magnesium oxide, as well as at least 1 percent by weight of water, and formed into briquettes. The calcium oxide...

The repair of a reinforced elastomer article (10) having a hollow (12) therein relates to utilizing an amine curable polymer or prepolymer and a cured elastomer patch. The hollow (12) in the elastomer as well as the areas juxtaposition to the patch (20) is coated with a treating agent (30). The amine curable polymer or prepolymer (40) which may have rubber particles therein is then applied to the ...

A process and composition for applying and bonding an amine curable polymer or prepolymer at ambient temperatures to the surface of a cured elastomer substrate. The elastomer article or substrate is treated with an organic oxidant such as an N-halohydantoin, N-haloamide, or an N-haloimide, for example, the various isomers of mono-, di-, and trichloroisocyanuric acid. A polyisocyanate is applied th...

Molding compositions for the fabrication of shaped articles having enhanced mechanical properties are comprised of (i) a polymeric matrix, (ii) an inorganic reinforcing filler material therefor, and, advantageously, (iii) a polymer/filler coupling agent, said reinforcing filler material consisting essentially of intimate admixture of enstatite and silica advantageously prepared by calcination of a...

A process for the preparation of a water-impervious surface coating on a substrate comprising applying to the substrate a layer of an aqueous bitumen emulsion containing, based on dry matter, 5-55% by weight of an acrylic prepolymer, 1-15% by weight of an air-drying alkyd resin, 40-80% by weight of bitumen, and optionally up to 5% by weight of additives, applying to this layer a glass fibre layer,...

A process and apparatus is described for liquefying natural gas using two closed cycle, multicomponent refrigerants wherein a low level refrigerant cools and liquefies the gas by indirect heat exchange and a high level refrigerant cools and partially liquefies the low level refrigerant by indirect multistage heat exchange. The high level refrigerant is phase separated in order to use lighter refri...

Use of fine-grained pentaerythritol, dipentaerythritol or a mixture of these compounds as a pore forming additive in porous ceramic products such as ceramic abrasive wheels and ceramic filters.

This invention is directed to vapour-burst fast food, the process for making said food, and the container in which said food is prepared. The vapour-burst fast food is prepared by heating a sealed confining means containing a suitable mixture until the confining means ruptures so as to permit the heated mixture to undergo sudden expansion.

Compounds of the formula: wherein R1 is a C2-C4 alkyl; a C3-C6 cycloalkyl or benzyl; A and B are OH or A and B are OCOOR4 or B is OH and A is OCOOR4; and R4 is alkyl which are intermediates for the preparation of antitumor compounds of the formula: I wherein R1 is a C2-C4 alkyl; a C3-C6 cycloalkyl; a C3-C6 cycloalkyl substituted by a halogen, hydroxy, methoxy, amino or dimet...

A method is disclosed for cooling a multicomponent gas stream containing variable amounts of the components by passing the gas stream through a heat exchange relationship with a fluid coolant stream so that carry-up of the condensed phase is maintained without condensed phase backmixing over the compositional range of the multicomponent gas stream. The gas stream is cooled by passing it through a ...

This invention relates to novel 23-demycinosyltylosin-derivatives possessing potent and broad spectrum anti-bacterial activity, processes for their preparation and pharmaceutical compositions containing them. The compounds are of the general formula wherein R1 is hydrogen or acyl; R2 is acyl; R3 is hydrogen or acyl; or R2 and R3 are together a carbonyl group linking the 3 sec -and...

The disclosure relates to a boom structure in an oil-spill-combatting system. A water craft (2) has booms extending to each side, and the ends of an oil collecting rope (4) are secured to the ends of the booms. Oil is recovered from the rope by running the rope (4) through an apparatus (3) which is situated at the aft of the craft (2). The rope is run first in one direction and then in the opposit...

A radio communications system comprising at least one master station and a plurality of slave stations in two-way frequency-hopping communication therewith. For telephony, speech is digitally encoded. Digital data is transmitted in packets using successive bursts at different frequencies separated by intervals of silence. Each slave station has its own frequency-hopping pattern independent of the ...

A frequency jump radiocommunications system fixed station in which n receivers and n channels may be connected to p transmitters; p being less than n. A management circuit is provided on each of the n channels to provide signals indicating the active/nonactive state of each channel. A time/frequency law generator is provided on each channel to generate the jumped frequency signals. A general contr...

The invention relates to a method of welding together thermoplastic using a shrink film that is applied over the area to be welded together and is heated to a temperature in excess of the fusion point of the thermoplastic. According to the invention, the Vaseline thermoplastic is applied to the area to be welded together before the shrink film is applied, after which only the sections of the shrin...

The invention concerns 3,4-dihydropyrimido [1,2-a]benzimidazole derivatives bearing one or more substituents at positions 6, 7, 8 or 9; processes for their preparation and manufacture; and pharmaceutical compositions thereof. The compounds inhibit the aggregation of blood-platelets and may be used in vivo, in the treatment or prophylaxis of thrombosis or occlusive vascular disease, or in vitro, in...

1. Trigger-actuated dispensing cap for a pressurized container having a valved closure, the cap comprising : a) a slotted housing (12) adapted to be mounted on the perimeter of the closure, b) an actuator (32) for the valve, the actuator being disposed within the slotted housing and having a valve-connecting portion (36) and a discharge portion (34), these portions defining a discharge duct (38, 4...

A sensor, and a method of calibrating a sensor for measuring the partial pressure of gas in a liquid, are provided. The sensor (1) comprises two electrodes (2) and (5) mounted on a support member (3) and covered by a moistenable membrane (6) which is permeable to gas, and means (9) for retaining a liquid around the moistenable membrane. The method comprises obtaining two sets of values of current ...