| 摘要 |
1340627 Morpholinodithiobenzothiazole GOODYEAR TIRE & RUBBER CO 4 July 1972 [4 Aug 1971] 31264/72 Heading C2C A process of preparing 2-(4-morpholinodithio)- benzothiazole comprises reacting a mixture of morpholine, sulfur, an inert organic solvent and wet 2-mercaptobenzothiazole in the presence of an aqueous solution of a water soluble oxidizing agent wherein the wet 2-mercaptobenzothiazole contains 25 to 150 parts by weight of water per 100 parts by weight of 2-mercaptobenzothiazole with the proviso that the total water content in the morpholine, sulfur, solvent, 2-mercaptobenzothiazole mixture, does not exceed 150 parts by weight of water per 100 parts by weight of 2-mercaptobenzothiazole. The wet 2-mercaptobenzothiazole may be the separated product resulting from the preparation of 2-mercaptobenzothiazole in an aqueous system to form an aqueous slurry from which the 2- mercaptobenzothiazole is separated, e.g. as a filter cake. Batch or continuous operation is possible. Examples use isopropyl alcohol as solvent and NaOCl as oxidizing agent. |
