Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-11-06
2007-11-06
Anderson, Rebecca (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
10486294
ABSTRACT:
The solution concerns a process of production of N-alkyl-2-benzthiazolylsulfeneimides by means of a reaction of 2-benzthiazolylsulfenyl chloride with an excess of a corresponding alkylamine in an anhydrous reaction medium. Removement of water and moisture from the reaction medium is ensured by azeotropic distillation of a part of the solvent. The method solves also trapping of the excess amine by extraction with water to recycle it in the process, removing of the unconverted raw material from the crude product by chemical refining with aqueous lye and extraction of by-products and pitches by elutriating the product in an organic solvent with the aim to obtain pure benzthiazolylsulfeneimide containing no less than 95% of the active substance, which can be used as a vulcanization accelerator in ruber mixtures. A device for performing this method consists of a reactor with a multiple propeller mixer on a common shaft
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Kri{hacek over (z)}anovi{hacek over (c)} Karol
Pintér Jozef
Śtrauchová Al{hacek over (z)}beta
Vali Kamil
{hacek over (S)}ereda Gabriel
Anderson Rebecca
Duslo A.S.
Ohlandt Greeley Ruggiero & Perle LLP
Rauchfuss, Jr. George W.
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