Abstract: A method is provided for the intrinsically safe handling of 3-chloropropyne in the presence of a diluent with a boiling point ranging from ?50° C. (223 K) to 200° C. (473 K) under atmospheric pressure, wherein the concentration of 3-chloropropyne in the liquid phase and in the gas phase is kept below the concentrations capable of deflagration by means of the type and amount of the diluent, the temperature and the total system pressure, together with the use of a 3-chloropropyne prepared, stored or transported in this way in the synthesis of dyestuffs, pharmaceutical and agricultural active ingredients, electroplating auxiliaries, disinfectants, steroids and growth hormones.

Abstract: An amine-containing mixture containing one or more amines, water, low-boilers and optionally high-boilers is fractionated by a process having the steps (iii) and (iv) and optionally the steps (i), (ii) and (v): (i) a (first) low-boiler fraction is separated off from the amine-containing mixture by distillation, (ii) a (first) high-boiler fraction is separated off from the amine-containing mixture by distillation, (iii) the amine-containing mixture is extracted with sodium hydroxide solution, producing an aqueous, sodium-hydroxide-containing first phase and an aqueous-organic, amine-, (further) low-boiler- and possibly (further) high-boiler-containing second phase, (iv) the aqueous-organic second phase, is distilled, producing essentially anhydrous amine as bottom-phase take off or sidestream takeoff in the stripping part of the distillation column, an amine/water azeotrop as sidestream takeoff in the enrichment part of the column and a (further) low-boiler fraction as overhead takeoff, and recycling the amin

Abstract: A mixture containing one or more amines, water, low-boilers and high-boilers, is fractioned in a process wherein (i) low-boilers are separated from the mixture by distillation, (ii) high-boilers are separated from the mixture by distillation, (iii) the mixture is extracted with a sodium hydroxide solution to form an aqueous, sodium-hydroxide-containing first phase and an aqueous-organic, amine-containing second phase, and (iv) the aqueous-organic second phase is distilled to form an amine/water azeotrop and an essentially anhydrous amine, and the amine/water azeotrop is recycled to the extraction step (iii).

Abstract: A process for fractionating an amine-containing mixture which comprises one or more amines, water, low-boilers and high-boilers, having the steps (i) to (iv): (i) separating off by distillation low-boilers from the amine-containing mixture, (ii) separating off by distillation high-boilers from the amine-containing mixture, (iii) extracting the amine-containing mixture with sodium hydroxide solution, producing an aqueous, sodium-hydroxide-containing first phase and an aqueous-organic, amine-containing second phase, (iv) distilling the aqueous-organic second phase, producing an amine/water azeotrope and an essentially anhydrous amine, and recycling the amine/water azeotrope to the extraction step (iii).

Abstract: A mixture containing mixture one or more amines, water, low-boilers and high-boilers, is fractioned in a process wherein (i) low-boilers are separated from the mixture by distillation, (ii) high-boilers are separated from the mixture by distillation, (iii) the mixture is extracted with a sodium hydroxide solution to form an aqueous, sodium-hydroxide-containing first phase and an aqueous-organic, amine-containing second phase, and (iv) the aqueous-organic second phase is distilled to form an amine/water azeotrope and an essentially anhydrous amine, and the amine/water azeotrope is recycled to the extraction step (iii).

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: A method is provided for the intrinsically safe handling of 3-chloropropyne in the presence of a diluent with a boiling point ranging from −50° C. (223 K) to 200° C. (473 K) under atmospheric pressure, wherein the concentration of 3-chloropropyne in the liquid phase and in the gas phase is kept below the concentrations capable of deflagration by means of the type and amount of the diluent, the temperature and the total system pressure, together with the use of a 3-chloropropyne prepared, stored or transported in this way in the synthesis of dyestuffs, pharmaceutical and agricultural active ingredients, electroplating auxiliaries, disinfectants, steroids and growth hormones.

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: A process for fractionating an amine-containing mixture which comprises one or more amines, water, low-boilers and optionally high-boilers, having the steps (i) to (v):

Abstract: A process for fractionating an amine-containing mixture which comprises one or more amines, water, low-boilers and high-boilers, having the steps (i) to (iv):

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: A process for the storage and transport of chloroformic acid esters in tanks or pipelines which have a plastic inside surface, which comprises using a plastic having a total nitrogen content of from 0 to 100 ppm by weight, where this plastic forms from 20 to 100% of the inside surface, and the use of tanks or pipelines of this type for the storage and transport of chloroformic acid esters.

Abstract: A process for preparing a secondary or tertiary 2-methyl-1,5-pen-tanediamine of the formula I where R1 and R2 are H, C1-C20-alkyl, C3-C8-cycloalkyl, aryl, C7-C20-arylalkyl, where the radicals R1 and R2 may bear substituents selected from the group consisting of C1-C20-alkyl, C1-C20-alkoxy, C6-C20-aryloxy and hydroxy, and R1 and R2 are not simultaneously hydrogen, or R1 and R2 are together an unsubstituted or C1-C20-alkyl- and/or C1-C20-alkoxy-substituted C3-C7-alkylene chain which may, if desired, be interrupted by one or two O or NR3 groups, where R3 is H or C1-C20-alkyl comprises reacting 2-methylglutarodinitrile with a primary or secondary amine of the formula R1R2NH and hydrogen at from 50 to 250° C. and pressures of from 0.5 to 35 MPa in the presence of an oxidic supported catalyst comprising one or more noble metals which has been treated with hydrogen at from 50 to 300° C. for at least 0.5 hour before use.

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: The present invention provides pyrazole compounds which are useful as nitrification inhibitors.

Abstract: Process for the preparation of methylpyrazoles from diacetylene and hydrazines in which the diacetylene is removed from cracked gas by absorption and is then reacted with hydrazines.

Abstract: Process for the preparation of 2,4-hexadiyne-1,6-diol of the formula IHO-CH.sub.2 -CH.sub.2 -C.ident.C-.ident.C-CH.sub.2 -OH (I)by the reaction of diacetylene of the formula IIH-C.ident.C-C.ident.C-H (II)with formaldehyde of the formula IIIH.sub.2 C=O (III),in the presence of a silver catalysts, in which the reaction is carried out in the presence of a polar organic solvent at temperatures ranging from 0.degree. to 150.degree. C. and under pressures ranging from 0.01 to 10 bar.

Abstract: A process for the preparation of a 4-methylpyrimidine of the general formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 phenalkyl, C.sub.7 -C.sub.12 alkylphenyl, NH.sub.2, NHCN, OH, and SH,in which a 1-aminovinyl methyl ketone of the general formula II ##STR2## in which R.sup.2 and R.sup.3 denote C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 phenylalkyl, C.sub.7 -C.sub.12 alkylphenyl, C.sub.1 -C.sub.20 hydroxyalkyl or together denote a C.sub.2 -C.sub.7 alkylene chain optionally mono- to tetra-substituted by C.sub.1 -C.sub.4 alkyl and optionally interrupted by oxygen, nitrogen, or sulfur, is caused to react with a carboxamide or amidine or a salt thereof of the general formula III ##STR3## in which R.sup.1 has the aforementioned meanings and x stands for oxygen or NH, at temperatures ranging from 20.degree. to 200.degree. C. and pressures ranging from 0.01 to 50 bar.