Abstract: Apparatus for heating a flowable mixture of particulate coal and a liquid hydrocarbon stream at high pressure by heat exchange with reaction products of a coal hydrogenation and liquefaction process which are obtained in the gaseous phase under reaction conditions, comprising direct heat exchange means and indirect heat exchange means combined into a single structural unit, and being devoid of liquid spray means, said single structural unit containing an upper zone separated from a lower zone and being housed in a pressure vessel, and further comprising feed means for viscous material connected to the bottom part of the housing, said indirect heat-exchange means being equipped with a feed means and a discharge means for a heat exchange fluid, said direct heat-exchange means arranged above said direct heat exchange means and being provided with discharge means for heated viscous material, feed means for heat exchange fluid for said direct heat exchange, and discharge means for the latter heat exchange fluid co

Abstract: A method of and an apparatus for carrying out exothermic reactions in suspensions containing catalyst particles as well as a reaction participant and wherein the suspension is pumped to the reaction pressure and thereby fed to the reaction vessel. According to the invention, the suspension is preheated, before entering the reaction zone in the same pressurized vessel by direct heat exchange with reaction products from the reaction zone before the suspension is passed into the latter.

Abstract: The cable connection for low-temperature cable in which a pair of cable ends are joined. Each cable comprises a plurality of generally coaxial ducts defining a central compartment traversed by the electrical conductor or a plurality of electrical conductors in a sheath of electrical insulation and a pair of evacuated (vacuum) compartments surrounding the central compartment. Between the two vacuum compartments there is provided a coolant-filled compartment. In the connector, the evacuated compartments of the two cable ends overlap axially and the connection is formed by rigid, preferably cylindrical, walls.

Abstract: An object, such as a superconductive magnet, is cooled by a coolant operating with a single or multistage coolant cycle in which the coolant, in the last stage, is partially expanded, cooled in a separator-evaporator and fed to the object to be cooled. At least a portion of the coolant fluid, following passage through the object, is expanded through a throttle to form a liquid-gas phase mixture which is separated in the separator-evaporator, the gas phase being recirculated. The expansion of the coolant fluid prior to entry into contact with the object is carried out according to the invention in one or more ejectors whose suction side or sides draws a portion of the cooling fluid from part of the cycle elsewhere into the stream fed to the object to increase the mass flow.