The present invention relates to a membrane treatment technique for extracting glyphosate powder from glyphosate mother liquor. This is the main method of glyphosate mother liquor, through an ultrafiltration membrane to remove visible particulate impurities, pH adjusted to 1 to 5, and then enter the two stage membrane treatment, the separation of the two grade and two grade light pus liquid, two pus return two inlet film continuously recycled, two with the increasing amount of glyphosate solution. After a certain time, dilute washing adding quantitative water; so repeated three times washing water after collecting two grade and two grade light liquid solution. Two after three times of water washing solution, mainly containing glyphosate, glyphosine, methyl glyphosate and other organic matter, level two to level five thick liquid membrane treatment, according to the size and charge of the molecular weight of the isolated rich in glyphosate light liquid and rich glyphosine solution. Glyphosate light diluted with water through six levels of membrane concentration, can be obtained with glyphosate solution. Six level liquid, apply to level six film. Two level light liquid alkali add around the pH adjusted to 7, enter the three stage membrane treatment, separation of three grade and three grade light liquid solution. Grade three to grade two to thick liquid membrane treatment. Level three to level Four thin liquid film processing, separation of four grade and four grade light liquid solution. Grade four to grade two to thick liquid membrane treatment. The four stage is the high salinity wastewater. In the invention, glyphosate and glyphosate powder are extracted from glyphosate mother liquor at room temperature, so as to maximize the utilization of the resources.
【技术实现步骤摘要】
本专利技术涉及一种从草甘膦母液中提取草甘膦粉的膜处理技术。
技术介绍
草甘膦是一种高效、广谱、低毒、安全的灭生性除草剂。目前国内草甘膦生产方法主要有甘氨酸法和双甘膦氧化法,而无论哪种路线,在生产草甘膦原药的同时都会产生大量的母液,母液中含有草甘膦的质量分数大为1 2%。过去,草甘膦母液的通常处理方法是浓缩后配制10%钠盐水剂。但是10%草甘膦钠盐水剂使用过多会造成土壤分散性差、土质粘滞,成为钠碱土,导致作物减产和质量下降,因此国家在2010年禁止10%草甘膦钠盐水剂的生产。如何去除草甘膦母液中的盐分和合理利用其中的草甘膦,成为草甘膦母液处理急需解决的难题。申请号为200510053^0. 7的专利技术专利提供了一种在草甘膦母液中通入氨气、二氧化碳气体充分反应,过滤沉淀物,滤液浓缩去除氯化铵后配制水剂的方法。申请号为 200910100214. 5和200910098351的专利技术专利提供了草甘膦母液经过膜分离浓缩后,制备含量为30%及以上有效成分的草甘膦制剂的方法。这些方法虽然实现了盐同有机物的部分分离,但是还有许多生产副产如增甘膦、甲基草甘膦等有机物未与草甘膦分离开。
技术实现思路
为了解决上述困难,本专利技术采用多级膜处理方法,从草甘膦母液中取出草甘膦粉, 从根本上实现了草甘膦母液的资源化利用,也保护了环境。本专利技术的主要技术方案如下草甘膦母液经预处理除去可见颗粒杂质,预处理可以是通过膜处理,或者其他过滤方法,包括布袋过滤器和(或)活性炭过滤器,优选采用一级膜处理,除去可见颗粒杂质的处理母液调节PH至1 5,然后进入二级膜处理,分出二级浓液和二级淡 ...
【技术保护点】
1.一种草甘膦母液的膜处理工艺,包括将草甘膦母液经预处理除去可见颗粒杂质,调节PH至1-5,进入二级膜处理,分出二级浓液和二级淡液,二级浓液加水除盐后,进入五级膜处理,分离出五级淡液和五级浓液,得到富集草甘膦的溶液。
【技术特征摘要】
【专利技术属性】
技术研发人员:王伟,周曙光,胡辉,姜胜宝,揭少卫,吴建年,佘慧玲,
申请(专利权)人:浙江新安化工集团股份有限公司,
类型:发明
国别省市:33[]
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