| 摘要 |
1,202,497. Vinyl pyridine salts. MIDLANDYORKSHIRE TAR DISTILLERS Ltd. 26 June, 1969 [18 July, 19681, No. 34285/68. Heading C2C. An aqueous solution of a quaternary vinyl pyridine salt is prepared by mixing a vinyl pyridine with water, adding a quaternizing agent to the mixture and heating the resulting mixture to form the desired solution. Suitable vinyl pyridines are, for example, 2-methyl-5- vinyl pyridine, 2-vinyl pyridine and 5-ethyl-2 vinyl pyridine and the preferred quaternating agent is a dialkyl sulphate, e.g. dimethyl sulphate.
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