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发明公开
CN1927828A 高纯度脒类盐酸盐的提纯方法 失效 - 权利终止

高纯度脒类盐酸盐的提纯方法
摘要：
本发明公开了一种高纯度脒类盐酸盐的提纯方法。该方法可将Pinner法或碱催化法得到的脒类盐酸盐醇溶液半成品，或是脒类盐酸盐成品，经醇盐与氯化铵反应，生成氯化钠或氯化钾沉淀，加入分子筛或大孔吸附树脂，或二者的混合物进行吸附、脱色，过滤，再除去吸附剂和氯化钠或氯化钾杂质，滤液经过蒸发、离心、干燥得到高纯度脒类盐酸盐产品。本发明与现有技术相比产品纯度高，用本发明所提供的方法提纯制备脒类盐酸盐，副产物氯化铵降到0.45％以下，脒类盐酸盐含量超过98％；产品色泽洁白，外观显著改善；氯化钠(钾)残留量低，脒类盐酸盐样品灰分率小于0.5％。
摘要（英）：

The present invention discloses amidine hydrochloride purifying process. The process includes the reaction of amidine hydrochloride product or its alcohol solution obtained through Pinner process or alkali catalyzed process with alkoxide and ammonium chloride to produce sodium chloride or potassium chloride precipitate; adsorption, decolorizing and filtering with molecular sieve and/or macroporous adsorption resin; eliminating adsorbent, sodium chloride or potassium chloride and other impurity; evaporating the filtrate, centrifuging and drying to obtain high purity amidine hydrochloride product. The said process can reach amidine hydrochloride content over 98 wt%, obviously improved appearance and low impurity content.

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