Abstract: Potassium sulfate is produced from a mixture of carnallite, potassium chloride, kieserite and residual quantities of less than 15% by weight of rock salt by treating the mixture at a temperature of 20.degree.-40.degree. C with potash magnesia liquor to form a slurry with at most 70 mole MgCl.sub.2 /1000 mole H.sub.2 O, whereafter the liquor portion of the slurry comprising a solution saturated with carnallite and rock salt is separated from the solid substance, which solid substance is then converted at temperatures of 75.degree.-110.degree. with a sulfate liquor, which contains 18-45 mole MgCl.sub.2 /1000 mole H.sub.2 O, into a mixture of langbeinite and potassium chloride, which mixture after separation from the liquor is treated at temperatures of 15.degree.-110.degree. C with a sulfate liquor containing 18-50 mole MgCl.sub.2 /1000 mole H.sub.2 O, whereupon the crystallizate is separated from the mother liquor and is converted with water to potassium sulfate.

Abstract: A process for the production of highly pure bromine from heated bromine-containing solutions. The process is an improvement over prior bromine-extraction methods comprising introducing steam and chlorine countercurrent to heated bromine-containing solution into a bromine column having a reboiler said reboiler having a liquid zone and a gaseous zone, withdrawing a mixture of bromine, chlorine and steam overhead from said bromine column, condensing the mixture of bromine, chlorine and steam withdrawn overhead to form crude bromine and sour water and distilling the crude bromine so formed.

Abstract: Apparatus for disinfecting medical apparatus, and especially artificial respirators, by the action of formaldehyde fumes subsequently neutralized by ammonia fumes, the apparatus being adapted to avoid the deposition of crystalline hexamethylene tetramine inside the respirator and comprising an enclosure for receiving the medical apparatus, a source of formaldehyde fumes likely to spread within the enclosure, and an auxiliary neutralization chamber communicating with the enclosure and provided with a source of ammonia; the volume of the neutralization chamber being such as to allow ammonia fumes to spread and to come into contact with formaldehyde fumes for a sufficient time to ensure neutralization.

Abstract: Concentrated magnesium chloride solutions are prepared from industrial liquors or brines by debrominating the liquor with chlorine, neutralizing the debrominated liquor up to a ph value of 3-6, adding a stoichiometric excess of calcium chloride to the neutralized liquor at temperatures in the range of 30.degree.-50.degree. C to form a calcium sulfate dehydrate crystallizate, separating the crystallizate from the mother liquor, adding a sufficient amount of carnallite to the mother liquor to increase the MgCl.sub.2 content thereof to 270-330 g/l after cold decomposition of the added carnallite and concentrating the resulting solution in two or more steps in the direct current in an evaporator with crystallization characteristics up to a final concentration of 440 to 470 g/l MgCl.sub.2 whereafter the concentrated magnesium chloride solution is separated from crude crystallized carnallite and sodium chloride formed during the concentration.

Abstract: An improved apparatus for person to person, rescue breath function transfer for rendering artificial respiration which allows the operator to quickly and easily synchronize his breathing with that of the victim. The apparatus is provided with a flexible flutter valve to enable the operator to sense audibly and visually when the victim is exhaling and the relative amount of air he is exhaling. A by-pass valve enables the victim to inhale fresh air at any time he desires. The present invention may be adapted for rescue air sharing, booster breathing, and resuscitation in a toxic environment. A connector is provided for the quick connection of an air or oxygen tank to the fresh air inlet port. The apparatus of the present invention is designed to be lightweight, economical to fabricate, portable, and easy to clean or repair. A modified form of the present invention can be used for the artificial respiration of animals.

Abstract: A centrifugal blood pump and method of pumping blood to reduce the pressure in either the right or left ventricle in synchronism with the ventricular contractions of a failing heart. The pump is implanted in a parallel relationship with the ventricle to be assisted and is run at a constant speed. When the pressure in the ventricle reaches a predetermined value, blood will automatically start to flow through the pump thereby reducing the maximum allowable pressure in the ventricle being assisted.

Abstract: A propulsion system useful, for example, for automobiles, comprising an air compressor, a rotary engine, and a multiple stage turbine mounted upon a common shaft, and an infuser section comprising a plurality of nozzles for injecting air into the exhaust gases from the turbine to reduce the temperature and consequently the pressure of the exhaust gases prior to passage into an exhaust pipe.