Abstract: The invention relates to a process for the production of cyanuric chloride moldings, particularly in rod or flake form. Cyanuric chloride melt is cooled in a pressure cell equipped with a die capable of strand formation, wherein solidification takes place in the channel or channels of the die. The solidified cyanuric chloride is pressed out of the die in strand form at a temperature of 140.degree. C. or less, preferably 40 to 60.degree. C., and reduced in size as required. The process reduces the sublimation which is otherwise conventional during solidification and cooling.

Abstract: An arrangement for exchanging heat between the environment and a heat-transfer fluid, especially a solar heat absorber, includes a plurality of heat exchange elements which are provided with external fins and have internal flow-through passages for the fluid. The heat exchange elements are mounted on and the passages thereof communicate with internal channels of collector pipes. The collector pipes are, in turn, connected by respective corner members to connecting pipes to form a frame therewith. Such a frame, together with the heat exchange elements mounted therein, constitutes a heat-exchanger unit. A plurality of such heat-exchanger units can be arranged next to one another and/or above another in substantially vertical positions, to form an energy fence or a protective wall with heat-exchange capability. Then, the connecting pipes of the individual heat-exchanger units are connected to one another to establish a continuous flow pattern of the heat-transfer fluid through the arrangement.

Abstract: Solid cyanuric chloride is recovered by a process of spraying in the presence of a cooling medium liquid cyanuric chloride which preferably is freed from chlorine and cyanogen chloride, the cyanuric chloride is sprayed with the aid of known spraying apparatus into a separation container optionally with a propellant, while simultaneously with the cyanuric chloride spraying a liquid cooling medium through a second spraying apparatus separate from the first spraying apparatus, withdrawing the solidified cyanuric chloride from the separatory container and drawing off the resulting now gaseous cooling medium containing cyanuric chloride from the lower portion of the separatory container.