Abstract: A process for preparing stable dry powders which are insoluble in hot water and which contain fat-soluble vitamins and/or carotenoids, which comprises the following steps:a) preparing an aqueous dispersion containing essentially these fat-soluble active substances, film-forming colloids and reducing sugars,b) converting this dispersion into dry vitamin and/or carotenoid products in powder form andc) thermally curing the powder at from 60.degree. to 180.degree. C.,wherein gelatin in combination with one or more organic amino compounds which are free or bonded in the manner of a salt and which contain a basic primary amino group and, in addition, either another amino group, a hydroxyl group, an alkoxy group or a carboxyl group, and/or in combination with sufficient basic alkali metal or alkaline earth metal compound for the dispersion to have a pH of from 7.5 to 10, is used as film-forming colloid, and the dry powders obtainable via this process are described.

Abstract: Pulverulent products composed of a water-insoluble core substance and of a protective covering, are obtainable bydispersing the core substance in an aqueous solution of amylose or a starch with an amylose content of more than 40% by weight as film-forming polymer for the protective covering,spraying this dispersion using hydrophobic silica as auxiliary andsubsequently drying the sprayed particles.

Abstract: A stable mixture of an oxidation-sensitive compound contains triglycerides, complexing agents and coating substances as well as the oxidation-sensitive compound.

Abstract: Glowing coke descending through a cooling duct in a coking plant is quenched by two gas flows respectively traversing an upper compartment and a lower compartment of the duct, the two compartments meeting at a restricted gate for the passage of the coke. At least the lower gas flow, passing in countercurrent to the descending coke charge, is also circulated through a drying and preheating oven for coal to be fed to a coke-oven battery of the plant, thus containing some water vapor. When the upper flow is also constituted by coal-drying gas, it is passed downward through the upper compartment in order to reduce the height of a high-temperature zone in which combustion and thus loss of coke could occur. The coke gate is formed by a funnel-shaped upper partition and an upwardly pointing conical lower partition between which a scavenger gas passes in cross-flow.

Abstract: A chopper has a housing centered on an axis and having a radially open input and a radially open output spaced angularly therefrom as well as a pair of axially oppositely open intakes, and a cutter drum rotatable in the housing about the axis and having a pair of end plates transverse of the axis and having axially oppositely directed faces confronting the respective intakes and a plurality of blades secured to and between the end plates and having cutting edges defining on rotation of the drum an orbit centered on the axis. Respective pluralities of vanes at the end plates can be secured either to the respective end plates in in-service positions extending generally radially thereon so that rotation of the drum moves the vanes to draw air in the axial intakes and expel it through the radial output or in an out-of-service position in which they do not move appreciable air. The vanes can be secured in the out-of-service position also to the respective end plates but extending generally only angularly.

Abstract: A process for pulverizing substances which are sensitive to oxidation, in particular oily substances, by dispersing oil-soluble substances, e.g. vitamins, carotinoids, pharmaceutically active compounds or aromas, in an aqueous solution of a film-forming colloid, which constitutes the continuous phase of the dispersion, with the addition of one or more substances from the group comprising the mono-, di- and polysaccharides, atomizing the dispersion, in a spray tower, in the presence of a spraying assistant and collecting the resulting particles in a fluidized bed, wherein, as the spraying auxiliary, a hydrophobic silica or a metal salt of a higher fatty acid is introduced above the fluidized bed and distributed uniformly in the spraying space, at a temperature at which the colloid of the atomized particles has not yet solidified, and the assistant-laden particles, colloid material of which essentially has not yet gelatinized, is collected in a fluidized bed, and dried therein in a conventional manner.

Abstract: A membrane having a preselected pore type which is suited for separating processes comprising a shaped body formed by heating a mixture of finely ground carbonaceous material with a binder composed of about 5 to 20% by weight natural or synthetic elastomer or a mixture of both and of about 1 to 20% by weight of thermoplastic material to about 400.degree. to 1400.degree. C. in an inert atmosphere at a rate of temperature increase between 0.1.degree. and 10.degree. C./min. The membranes are useful for a wide range of selective chemical and physical separation operations of different materials.

Abstract: A vitamin E dry powder, which contains a protein colloid and a disaccharide as carriers, is prepared by dispersing a vitamin E ester in a residual liquor, low in alkaline earth metal ions and rich in lactose, from the production of lactose, in the presence of from 2 to 30% by weight, based on the solids content of the residual liquor, of a caseinate, and spray-drying the dispersion.The vitamin E dry powder thus prepared is stable, easy to dose and physiologically safe, so that it can be used for any desired purpose.

Abstract: Cyclic methyl fumaraldehyde monoacetals and a process for their production by oxidation of the corresponding methylbut-2-en-4-ol-1-al acetal with an H.sub.2 SO.sub.4 -containing solution of chromic acid in acetone. The new compounds are of considerable interest as intermediates in the synthesis of carotinoids.

Abstract: A carbonaceous adsorbent in the form of a shaped body which has been heated to about 400 to 1400.degree. C in an inert atmosphere is composed essentially of a mixture of finely divided carbonaceous material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material. The adsorbent is made by subjecting the mixture to a shaping step followed by heating to a temperature of about 400.degree. to 1400.degree. C in an inert atmosphere which step may be followed by an activation of the carbonaceous material.

Abstract: A crop-feed arrangement for a hay baler displaced along a swath is provided with a pickup drum whose tines elevate the crop material from the ground and dispose it in a trough extending transversely of the direction of advance of the baler. An auxiliary feed device is provided above the pickup drum and is angularly oscillatable, while being provided with independently elastically suspended pushers, for feeding the crop material into the trough in which a transverse-feed mechanism, e.g. a fork describing a kidney-shaped pattern of motion advances the crop material into the lateral opening of the press channel. The ram compacts the crop material in this channel which extends in the travel direction, whereupon the bale is tied and the finished bale ejected at the rearward end of the channel.

Abstract: 2(OR 3)-Methyl-1-acetoxy-4-alkoxy(or phenoxy)-1,3-butadienes and a process for their manufacture. The new 2(or 3)-methyl-1-acetoxy-4-alkoxy(or phenoxy)-1,3-butadienes are obtained by heating the corresponding methyl-4-alkoxy(or phenoxy)-crotonaldehyde with an excess of acetic anhydride and an alkali metal acetate, alkali metal carbonate or alkali metal hydroxide or a non-aromatic bicyclic amine or by heating the corresponding methyl-1-acetoxy-4,4-dialkoxy-2-butene in the presence of p-toluenesulfonic acid and quinoline at a temperature of from 150.degree. to 260.degree. C. The new compounds are of very considerable importance as intermediates in the synthesis of carotenoids.

Abstract: A crop-feed arrangement for a hay baler displaced along a swath is provided with a pickup drum whose tines elevate the crop material from the ground and dispose it in a trough extending transversely of the direction of advance of the baler. An auxiliary feed device is provided above the pickup drum and is angularly oscillatable, while being provided with independently elastically suspended pushers, for feeding the crop material into the trough in which a transverse-feed mechanism, e.g. a fork describing a kidney-shaped pattern of motion advances the crop material into the lateral opening of the press channel. The ram compacts the crop material in this channel which extends in the travel direction, whereupon the bale is tied and the finished bale ejected at the rearward end of the channel.