Abstract: A plant for producing a concrete body having a planar upper side, wherein a high surface quality is obtained. A concrete body is extruded from unset concrete and is provided with a groove profile at the upper side thereof by means of a profiling unit. By means of the profiling unit and depending on the comb-shaped profile thereof, the sand particles are separated according to size, wherein large sand particles are displaced from the surface area of the concrete body toward the inside, this being toward the interior of the concrete body. Only fine sand particles can pass the profile, whereby raised areas of the groove profile are formed, which are made of extremely fine-grained unset concrete. Subsequently, the upper side of the concrete body is leveled by means of a leveling unit, wherein the raised areas of the groove profile are crushed and the fine-grained unset concrete of the raised areas of the groove profile is distributed to form a cover layer.

Abstract: The invention relates to a method for producing a concrete body having a planar upper side, wherein a high surface quality is obtained. In the method, a concrete body is extruded from unset concrete and is provided with a groove profile at the upper side thereof by means of a profiling unit. By means of the profiling unit and depending on the comb-shaped profile thereof, the sand particles are separated according to size, wherein large sand particles are displaced from the surface area of the concrete body toward the inside, this being toward the interior of the concrete body. Only fine sand particles can pass the profile, whereby raised areas of the groove profile are formed, which are made of extremely fine-grained unset concrete. Subsequently, the upper side of the concrete body is leveled by means of a leveling unit, wherein the raised areas of the groove profile are crushed and the fine-grained unset concrete of the raised areas of the groove profile is distributed to form a cover layer.

Abstract: In the fining of a protein-containing beverage such as a fruit juice or a grape or fruit wine or a must therefor in unfermented, partially fermented or fermented form, wherein silica sol is added to said beverage, and the deposit formed is separated off, the improvement which comprises adding an aluminate-modified silica sol to said beverage, whereby the protein removing and flocculation occurs more readily than with unmodified silica sol. The aluminate is preferably added in the form of sodium aluminate. Optionally gelatin is also added.

Abstract: A process for the production of disulfur dichloride comprising establishing a molten mass of sulfur at a temperature of about 200.degree. to 300.degree. C, continuously introducing chlorine into said mass at a rate such that there is always an excess of sulfur in said mass, continuously withdrawing disulfur dichloride vapor from above said mass, and condensing said disulfur dichloride vapor. Advantageously the temperature is about 220.degree. to 260.degree. C, the pressure is at or near atmospheric pressure and sulfur and chlorine are added to the molten mass at about the same rate they are withdrawn therefrom in the form of disulfur dichloride. An apparatus is also described.