PURPOSE:To obtain the titled thin single crystal film of a stoichiometrical composition without lattice defects, dislocation, and mixing in of impurities by forming the thin single crystal film of the A15 compd. on a specified single crystal substrate by vapor epitaxial growth. CONSTITUTION:For example, Nb3Sn is selected from the single crystals of the A15 compd., and the substrate made of GaAs se...

An electric actuator having an output member movable from a first variable position to a second variable position; an electric motor operable to control a spring system to exert an output force on the output member when in its second position; means for generating an electrical signal when the output member is about to leave the second position as it returns to the first position; and a motor-cont...

An improved process for the production of cross-linked polyolefin foams by mixing polyolefins with conventional foaming agents and cross-linking agents known for polyolefin foam production, shaping the mixture into a plate or into a continuous sheet, substantially without cross-linking and foaming, the improvement comprises mixing said mixture with up to 50% by weight of an alpha , beta -unsatura...

The die (6) comprises a thick cylindrical body (7) which is surrounded by a cooling jacket (15) clamped against the pouring basin (2) and in contact with the latter in a plane (P). The body (7) is extended in the casting orifice (4) by a composite head (17) comprising a thin inner annular lip (22), whereof the inner surface extends that of the body (7) and a ring (24) of refractory material fitted...

A process for the treatment of a spent hydrochloric acid solution containing dissolved iron, zinc, and minor amounts of heavy metals to remove such dissolved metals from the solution, which process comprises contacting said solution with metallic iron in a first stage, whereby trivalent iron present in the solution is reduced to divalent iron and certain of said heavy metals may be reduced to elem...

A system (10) for determining the level of a fluidised bed uses a minimum number of pressure sensors. A pressure sensor (12) is positioned at the base of the bed, another pressure sensor (14) is positioned at approximately 2.44 m (8 ft) above a distributor plate, and other pressure sensors (16, 18) are positioned at intermediate locations therebetween. The measurements from the sensors are selecti...

Apparatus is provided for controlling a tubular polymerisation reactor (10) having a feed line (4) for a raw material to be polymerised, a cooling circuit for cooling the reactor with a flow of coolant, and an exit line (8) for a product of polymerisation. The apparatus comprises a quality sensor (22) for sensing the actual quality of the product in the exit line (8), a quality controller (20) for...

There is provided a process for the selective anomeric deacetylation of sugar derivatives, which may be substituted by substituents such as acetoxy, chloracetoxy, alkoxy, azido, etc., by means of tin compounds R3SnOR min or R2SnO where R is lower alkyl resulting either directly in the desired anomeric compound or in an intermediate which is converted to the desired compound by silica or by acid h...

Process for preparing catalyst, by kneading and/or impregnation which comprises 3-60 pbw cobalt and 0.1-100 pbw of zirconium, titanium and/or chromium per 100 pbw silica and/or alumina and which has such L and S as to satisfy the relation (3 + 4R) > L/S > (0.3 + 0.4R), wherein L = total quantity of cobalt present on catalyst (mg Co/ml), S = the surface area of catalyst m<2>/ml, and R = weight ra...

In the electrolytic production of aluminum by electrowinning or electrorefining processes, cell components such as cathode current feeders which in use are normally covered with molten aluminum are made of a composite material of aluminum or an aluminum alloy or intermetallic compound with an aluminum oxycompound, usually alumina, and possibly containing minor amounts of additives such as borides ...

A highly efficient water purification device includes a degasification apparatus, a distillation apparatus and an ion removal device to purify contaminated water. When a partial vacuum is applied to the degasification apparatus, dissolved gases leave the water, and a heat exchange process occurs which heats the gases and cools the degassed water. A gas exhaust channel transfers the warmed gases to...