摘要:
Nitrification inhibitors contain azole hemiaminal derivatives of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, alkyl, aryl or halogen, R.sup.3 is alkyl, cycloalkyl, alkoxy, alkenyl, alkynyl, styryl, aryl, hetaryl or aralkyl, where the aromatic radical may be substituted, or is hydroxyl, A and B are each N or CR.sup.4, and R.sup.4 is hydrogen, alkyl, aryl or halogen.
摘要:
1-Hydroxypyrazoles of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen or halogen, and microbicides containing these compounds.
摘要:
1-Hydroxypyrazole derivatives of the formula (I) ##STR1## where A is ##STR2## n is 0 or 1, R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen, chlorine, bromine or iodine, R.sup.4 is hydrogen, a straight-chain or branched, open-chain alkyl, alkenyl or alkynyl radical, a cyclic alkyl, alkenyl or alkynyl radical or aryl or aralkyl, and the radicals R.sup.4 which are capable of substitution may furthermore be monosubstituted or polysubstituted by halogen, haloalkyl, haloalkoxy, alkyl, alkoxy, alkoxycarbonyl, --OH, .dbd.O, --COOH or salts of this, --NO.sub.2 or --CN, have a nitrification-inhibiting action. Substances where R.sup.4 is not hydrogen when n is 0 are novel.
摘要:
A process for the regeneration of a zeolite catalyst which comprises treating the catalyst thermally in the presence of a gas stream at temperatures above 120° C., the weight-based residence time of the gas stream over the catalyst during the thermal treatment being greater than 2 hours.
摘要:
Process for the preparation of a crystalline solid comprising at least one zeolitic material, in which the solid is crystallized from at least one precursor compound and the reaction discharge of the crystallization is fed directly to a drying stage.
摘要:
Process for the preparation of a crystalline solid comprising at least one zeolitic material, in which the solid is crystallized from at least one precursor compound and the reaction discharge of the crystallization is fed directly to a drying stage.
摘要:
A process for preparing glycol monoethers from olefins comprises reacting the olefins with an epoxidizing reagent in the simultaneous presence of hydroxyl-containing organic compounds over a mixture of epoxidation catalysts and alkoxylation catalysts.
摘要:
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.
摘要:
A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at from 250 to 800° C., preferably from 350 to 600° C., with a gas stream which contains from 0.1 to 4% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof, and (III) treating the catalyst at from 250 to 800° C., preferably from 350 to 600° C., with a gas stream which contains from more than 4 to 100% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof.
摘要:
Compounds of the formulae I and II ##STR1## are prepared by an addition reaction of a compound of the formula IIIR.sup.1 OH IIIwith an acetylene or allene of the formula IV or V ##STR2## where R.sup.1 and R are as defined, in the gas phase at elevated temperatures in the presence of a heterogeneous, silicate-containing catalyst, by a process in which the catalyst used is one which contains or consists of, as the active component, a zinc silicate obtained by precipitation in aqueous solution from a soluble silicon compound and zinc compound, zinc silicate beinga) an essentially X-ray amorphous zinc silicate of the formula VIZn.sub.a Si.sub.c O.sub.a+2c-0.5e (OH).sub.e.fH.sub.2 O VI, where e is from 0 to 2a+4c and the ratio a:c is from 1 to 3.5, and the ratio f:a is from 0 to 200, and/orb) a crystalline zinc silicate having the structure of hemimorphite of the formula Zn.sub.4 Si.sub.2 O.sub.7 (OH).sub.2.H.sub.2 O.
摘要翻译:式I和II的化合物通过在存在下在升高的温度下在气相中通过式III R1OHIII的化合物与式IV或V的炔或其中R1和R如所定义的二烯的加成反应来制备, 的不均一硅酸盐催化剂,其中使用的催化剂是含有或由作为活性组分的组成的方法,所述方法是通过在可溶性硅化合物和锌化合物的水溶液中沉淀而获得的硅酸锌,硅酸锌 a)基本上是式VI ZnaSicOa + 2c-0.5e(OH)e.fH2OVI的X射线无定形硅酸锌,其中e为0至2a + 4c,a:c为1至3.5,以及 比例f:a为0至200,和/或b)具有式Zn 4 Si 2 O 7(OH)2·H 2 O的半偏氟结构的结晶硅酸锌。