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    • 4. 发明申请
    • METHOD FOR PURIFYING ACRYLAMIDE ALKYL SULFONIC ACID
    • 纯化丙烯酰胺磺酸的方法
    • US20160137596A1
    • 2016-05-19
    • US14896387
    • 2014-02-11
    • Longyi MEI
    • Longyuan MEI
    • C07C303/44
    • C07C303/44C07C309/15
    • A method for purifying acrylamide alkyl sulfonic acid comprises: (1) making a material A evenly mixed and contacted with a solvent C, an amount of the material A exceeding a solubility of the material A in the solvent C under the condition where the material A is located, therefore the material A is not completely dissolved by the solvent C; (2) keeping the material A even mixed and contacted with the solvent C for at least 5 minutes; (3) performing a solid-liquid separation to obtain a solid, namely, a purified product B with impurities reduced. In the purifying method according to the invention, the material does not need to be completely dissolved, therefore less solvent is used, and the steps of dissolving the material by increasing temperature, separating out by decreasing temperature or removing the solvent are eliminated, so cost is reduced, efficiency is improved, and operations are simplified.
    • 丙烯酰胺烷基磺酸的纯化方法包括:(1)将材料A均匀混合并与溶剂C接触,一定量的材料A超过材料A在溶剂C中的溶解度,在材料A 因此材料A不被溶剂C完全溶解; (2)保持材料A均匀混合并与溶剂C接触至少5分钟; (3)进行固液分离以获得固体,即具有杂质降低的纯化物B。 在根据本发明的净化方法中,材料不需要完全溶解,因此使用较少的溶剂,并且消除了通过升高温度溶解材料,通过降低温度分离出来或除去溶剂的步骤,因此成本 降低效率,提高效率,简化操作。
    • 5. 发明申请
    • PREPARATION METHOD OF SOLID ACRYLAMIDEALKYL SULFONATE
    • 固体丙烯酰胺基磺酸盐的制备方法
    • US20160122295A1
    • 2016-05-05
    • US14765315
    • 2014-01-24
    • Longyi MEI
    • LONGYUAN MEI
    • C07C303/32C07C303/44
    • C07C303/32C07C303/44C07C309/15
    • The present invention provides a method for preparing a solid acrylamide alkyl sulfonate. Said method comprises: reacting 2-acrylamido-2-methylpropanesulfonic acid and analogs thereof with an alkaline substance in a solvent. The 2-acrylamido-2-methylpropanesulfonic acid and the analogs thereof and the alkaline substance are significant excess with respect to the solvent, so that the amount of the resulting acrylamido alkyl sulfonate exceeds the solubility under the reaction condition. The acrylamido alkyl sulfonate can be continuously generated and directly massively precipitated, and the precipitated solid product, i.e. the product, is collected. The method of the present invention can greatly improve production efficiency of products, save time, reduce cost, and easy to operate by leaving out the re-crystallization step and the like in the prior art.
    • 本发明提供一种制备固体丙烯酰胺烷基磺酸盐的方法。 所述方法包括:使2-丙烯酰胺基-2-甲基丙磺酸及其类似物与碱性物质在溶剂中反应。 2-丙烯酰氨基-2-甲基丙磺酸及其类似物和碱性物质相对于溶剂显着过量,使得所得丙烯酰氨基烷基磺酸盐的量超过反应条件下的溶解度。 丙烯酰氨基烷基磺酸酯可以连续生成并直接大量沉淀,并收集沉淀的固体产物,即产物。 本发明的方法可以通过省略现有技术中的再结晶步骤等而大大提高产品的生产效率,节省时间,降低成本,并且易于操作。