A process for producing a granulated catalyst for the synthesis of ammonia which comprises simultaneous melting and oxidation of iron using promotors in a thin layer of a melt of the resulting catalyst mass, granulation of said melt by a stream of air ensuring a horizontal movement of the formed granules and cooling thereof to the temperature of 1,000.degree. C., whereafter the resulting granules are reduced by a reducing gas at their spontaneous cooling.

A gas-liquid analyzer comprises a sample conveying assembly having a capillary tube with a sample under analysis, the walls of the tube being provided with two rows of openings arranged in opposition to each other. The openings of one of the rows accommodate hermetically secured ion-selective electrodes connected to a switching unit wired with a potentiometer and a potential corrector. Secured in the openings of another row are porous inserts adapted to contact electrolyte. The presence of sampl...

A catalyst for dehydrogenation of oxygen-containing derivatives of the cyclohexane series of the general formula: ##STR1## wherein R.sub.1 is hydrogen or a C.sub.1 -C.sub.4 alkyl; R.sub.2 and R.sub.3 are radicals having the same or different meanings: --H, --OH, .dbd.O, provided that R.sub.2 and R.sub.3 are not simultaneously hydrogen and R.sub.1, R.sub.2 and R.sub.3 are attached to different carbon atoms of the cycle, into the corresponding cyclic ketones and/or phenols containing the following...

A ceramic transfer picture with a water-absorbing separable paper carrier is provided with a screening layer on its surface opposite the image layer. Said screening layer leaves uncovered only the image areas to be moistened; further, a compensating layer of polyglycol or polyethylglycol wax is provided at or in the image layer as well as an organic intermediate layer between the paper carrier and the image layer controlling the plasiticization of the image layer. In order to achieve a fast sepa...

A motor control circuit includes a chopper circuit (11) including a main switching element (14) which is connected in series with the motor armature (12). The chopper is controlled by a Schmitt bistable circuit (34) which operates to switch the main switching element on when the actual motor current falls more than a set amount below a demanded level and off when the actual motor current rises more than a set amount above the demanded level, the demand level is determined by the driver's pedal c...

The method comprises mixing polymeric materials containing a filler with a hydrocarbonaceous solvent in a ratio of from 1:0.5 to 1:60 parts by mass. The above mixture is isothermally heated to provide for a thermal decomposition of the polymeric materials and for a thermal decomposition of the polymeric materials and for a formation of a suspension. Low-boiling fractions are distilled from the formed suspension in the presence of an inert gaseous agent at a temperature of 50.degree. to 400.degre...

A building structure for recurrent detonation of explosive charges of up to several hundreds of kilos with the aim to obtain effective sound dampening and economical use of materials. The building comprises a tube shaped steel structure (2) with two gable walls (4,4) inside the tube and which defines an explosion chamber (6) in the center portion thereof. One or preferably both of said two gable walls are apertured by a plurality of through-going openings. A webbed wall or the like (20) is situa...

A process for combined production of metal alloys, containing zirconium, iron, silicon and aluminium, and of a zirconium corundum, which method comprises melting charge materials, such as a zirconium concentrate, an iron ore and aluminium taken in a weight ratio of 51-69: 9.9-16.5: 19.8-34.8, respectively, at a temperature of 1,950.degree. to 2,000.degree. C., and a separate pouring of end products, the zirconium corundum being poured first. The remaining metal alloy is melted, prior to pouring,...

An applicator for an animal ear tag having a pliers-type action which has an ear-piercing pin member attached to the jaws, the pin member being capable of pivoting in a direction away from the jaws when closed.

A product container which is suitable for retaining flowable type materials and which comprises a container portion and a removable closure portion, both of which are formed from a semi-rigid thermoplastics material. The container portion has a marginal lip which incorporates an inwardly directed bead which defines an opening to the container. The closure has a central region which locates within the container opening and an inverted U-shaped rim portion which engages the lip of the container. T...