|4658046||Process for the preparation of methyltin chlorides|
Methyltin trichloride and dimethyltin dichloride are prepared in high yields without pressure using pentavalent organophosphorous dihalides as a catalyst. The catalyst may be reused for multiple sequential preparations of the methyltin chlorides....
|4613673||Catalysts preparation thereof and preparation of N-substituted acrylamides therewith|
This invention is directed to novel catalysts characterized as compounds of tin or zinc containing a direct metal-nitrogen bond. The novel catalysts are derived from a primary or secondary amine such as an alkyl amine, a heterocyclic amine, an aromatic am...
Ammonium stannates of the formula in which the symbols R1, R2, R3, R4, R7, X, Y, a, b, c, d, n, q, r, t and w are as defined in the description, are effective biocides. They can be used both for the protec...
|4510095||Production of organotin halides|
A process is disclosed for the direct production of organotin halides, particularly triorganotin halides by the reaction of elemental tin and an organotin halide in the presence of a reagent amount of an `onium compound of the general formula Cat+
|4179458||Process for preparing organotin compounds|
Organotin compounds comprising at least 50% and often at least 90% tetraorganotin compound and the remainder triorganotin halide, which are suitable for conversion to organotin precursors of stabilizers for polymers or fungicides, are made by reacting an ...
|4129584||Process for preparing dimethyltin dichloride|
A process is provided for preparing dimethyltin dichloride by the reaction of tin metal and methyl chloride in the presence of sulfonium or isothiuronium salts as catalysts....
|4092340||Process for preparing organotin compounds|
Tetraalkyltin compounds substantially free from tin, tin alkyl and di alkyl contaminants are prepared by reacting an alkyl halide of 1 - 4 carbon atoms with tin in the presence of an 'onium salt e.g. a quaternary ammonium halide and at least 0.5 g atom of...
|4052426||Process for the manufacture of dimethyl-tin dichloride|
Complexes composed of alkylphosphines or of alkylphosphonium chlorides and tin tetrachloride are good catalysts for the preparation of dimethyl-tin dichloride from tin and methyl chloride in the presence of sulphones and carbonates as solvents....
|4049689||Method for the preparation of alkyl tin halides|
In the process for the preparation of alkyl tin halides by means of direct conversion of tin with aliphatic halides, the alkyl halide is fed in such a way gradually to the gas space over the further reaction components that there is an overpressure of no ...
|3975417||Process for producing halogenated organotin compounds|
A process for the production of an octyltin chloride of the formula, Wherein m is an integer of 1 to 3, which comprises reacting n-octyl chloride with metallic tin in an organic solvent in the presence of (1) either a mixture of a phosphorus compound with an a...
|3970679||Process for the production of organotin halides in sulphones as reaction medium|
A process is described for the production of organotin halides from metallic tin and organic halides and in the presence of catalysts in sulphones as the reaction medium, whereby there are obtained, in addition to high yields, also high reaction rates....