Abstract: An iron melt is desulphurized. To this end, the irom melt is admixed with a powder mixture comprising metallic magnesium and at least one calcium compound, the latter being selected from calcium carbide, calcium oxide, calcium carbonate and dolomite, and the said calcium compound being used in the form of particles with a size of 0.06 to 3 mm, wherein the powder mixture contains 0.1 to 2.5 weight % of metallic magnesium in the form of particles having a size of 0.060 to 0.095 mm.

Abstract: Production of stabilized pulverulent red phosphorus. The phosphorus so stabilized comprises a homogeneous blend of red phosphorus particles with a size of at most about 2 mm and a metal compound of the second or third group of the Periodic System as an oxidation stabilizer, wherein the metal compound is the aluminum, calcium or zinc salt of a phosphinic acid of the general formula ##STR1## in which R.sub.1 and R.sub.2 each stand for an alkyl, cycloalkyl, aryl or aralkyl group having 1 to 20 carbon atoms, the metal compound being present in the homogeneous blend in a proportion of about 0.5 to 5 weight %.

Abstract: The invention provides stabilized pulverulent red phosphorus. It comprises a homogeneous blend of red phosphorus particles with a size of at most about 2 mm and a metal compound of the second or third group of the Periodic System as an oxidation stabilizer, wherein the metal compound is the neutral aluminum, magnesium, calcium or zinc salt of orthophosphoric acid, the metal compound being present in the homogeneous blend in a proportion of about 0.5 to 5 weight %.

Abstract: The invention provides stabilized pulverulent red phosphorus. It comprises a homogeneous blend of red phosphorus particles with a size of at most about 2 mm and a metal compound of the second or third group of the Periodic System as an oxidation stabilizer, wherein the metal compound is the aluminum, magnesium, calcium or zinc salt of an alkyl-, cycloalkyl-, aryl- or aralkylphosphonic acid having 1 to 20 carbon atoms, the metal compound being present in the homogeneous blend in a proportion of about 0.5 to 5 weight %.

Abstract: Antistatic properties are imparted to rubber by admixing it with conductive carbon black, vulcanizing the resulting blend and forming the rubber. More specifically, the rubber is admixed with about 5 to 40 weight % of conductive carbon black which has an AS-number of 15 to 35, a specific electric resistance of 10.sup.-1 up to 10.sup.-3 ohms .times. cm under a moulding pressure of 100 to 180 atmospheres absolute, a bulk density of 100 to 180 g/liter, a BET-surface area of 100 to 1000 m.sup.2 /g. The carbon black is made by a process wherein an aqueous suspension of carbon black with an AS-number higher than 15 and prepared by subjecting hydrocarbons, which are liquid at room temperature, to thermal conversion at 1200.degree. to 2000.degree. C, under pressures within the range 1 and 80 atmospheres absolute, and in the presence of oxygen or an oxygen-containing gas, and water scrubbing the resulting carbon-black-containing reaction gas, is intimately blended at 5.degree. to 120.degree.

Abstract: The invention provides stabilized pulverulent red phosphorus. It comprises a homogeneous blend of red phosphorus particles with a size of at most about 2 mm and a metal compound of the second or third group of the Periodic System as an oxidation stabilizer, wherein the metal compound is the aluminum, magnesium, calcium or zinc salt of an acid orthophosphoric acid ester of a long chain aliphatic alcohol, which may be ethoxylated, or phenol, the metal compound being present in the homogeneous blend in a proportion of about 0.25 to 5 weight %.

Abstract: Production of flameproof polyurethanes or polyurethane foams containing an ammonium polyphosphate of the general formula:H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1in which n stands for a whole number averaging a value of more than 400 up to about 1000, and the ratio of m:n is approximately 1:1, as a flameproofing agent, if desired in combination with a further flameproofing substance.

Abstract: The corrosion of aqueous heavy pulps which contain ferrosilicon with between 8 and 20 weight % of silicon as a heavy medium and are used in the heavy media separation of minerals is inhibited. To this end, the heavy pulp is used in admixture with between 0.1 and 0.

Abstract: Builders for detergent and cleaning compositions. The builders comprise copolymers made from .alpha.-hydroxyacrylic acid and acrylic acid. The copolymers contain between 9 and 85 mol % of acrylic acid and have a relative viscosity within the range 0.05 and 1.0, determined on a 1 weight % solution of the copolymers in aqueous 2N-sodium hydroxide solution, at 20.degree. C.

Abstract: Production of intumescent flame-retardant coating compositions which substantially contain a film-forming binder, an ammonium polyphosphate, one or more substances carbonizing under the action of heat, dispersing agents and fillers, if desired. The compositions contain more particularly an ammonium polyphosphate of the general formula:H.sub.(n.sub.-m).sub.+2 (NH.sub.4).sub.m P.sub.n O.sub.3n.sub.+1in which n stands for a whole number averaging a value of more than 400 up to about 800 and the ratio of m:n is about 1.

Abstract: Desensitized free-flowing red phosphorus. The phosphorus is comprised of a homogeneous blend consisting of between about 80 and 98 weight% of red phosphorus having a particle size of up to about 2 mm, and of between about 2 and 20 weight% of an organic or organo-silicon compound desensitizer. The desensitizer is liquid, inactive with respect to red phosphorus and has a minor vapor pressure at room temperature at atmospheric pressure.

Abstract: The invention provides builders for detergent and cleaning compositions. The builders comprise oligomers and/or polymers containing carboxylic and hydroxylic groups -- the latter groups being partially lactonized, if desired -- and a predominant proportion of C--C bonds in their principal chain. The oligomers and/or polymers are produced by hydrolyzing halogenated copolymers which have substantially between 5 and 60 weight % of halogen therein and a principal chain based on structural units, in any desirable sequential arrangement, of the following general formulae I and II or I and III ##EQU1## in which X, Y and Z stand for a hydrogen and/or halogen atom with the proviso that at least one of the X, Y and Z substituents stands for a halogen atom, R stands for a carboxy-halide radical, a carboxylic group, ester group, nitrile group or anhydride group, and the mole fraction m stands for a number greater than zero and smaller than 1.

Abstract: The invention provides the use of an iron/silicon/phosphorus-alloy containing between 8 and 25 weight % of silicon and between 0.3 and 2.5 weight % of phosphorus as heavy medium for making heavy pulps for the heavy media separation of minerals.