推荐回答(1个)
强碱性是因为季铵盐(氢氧化铵),氢氧根完全电离,而伯胺、仲胺、叔胺形成的交换基团因为氢氧根不能完全电离,故为弱碱。
弱碱性阴树脂主要用于水处理行业,比如原水含较高有机物,使用强碱阴树脂容易中毒的工况中,会选用大孔弱碱阴树脂置前,后跟强碱阴树脂。
弱碱阴树脂也普遍用于食品发酵行业,比如淀粉糖行业,淀粉水解板框过滤,通过活性炭脱色处理后,溶液中含有灰分和有机色素,需要采用离交设备进行脱灰脱色处理,一般为阳床+弱阴床+阳床+弱阴床,或阳+弱阴+弱阴等工艺,也会在最后跟上一个小阳柱调节PH值,这个时候弱阴树脂主要是去除溶液中的强酸根阴离子(比如硫酸根离子、氯根离子),同时最主要的是对溶液进行脱色处理,因为弱阴树脂对有机色素的吸附与洗脱能力都很不错,而强阴树脂虽然对有机色素吸附能力好,但很难洗脱,并容易导致葡萄糖异构化。
但是现在大部分国内离子交换树脂生产企业,受迫于环保和生产成本的压力,都普遍采用了新工艺生产弱碱阴树脂,这类新工艺弱碱树脂在使用中,物化性能表现不佳,弱碱阴树脂一直是争光的王牌产品,不管是生产工艺的可靠性,还是应用研究的先进性,几十年来一直稳居国内第一,并且在多种工况应用中,也完全达到并超过国外品牌同类产品。所以很负责任的给您推荐一下,这个产品您可以毫无疑问的选择争光。
借此问题回答之际,呼吁国内离子交换树脂生产企业同行,将企业发展眼光放长远一些,尤其是个别企业(在此不方便一一点名),不要为了眼前的蝇头小利,生产那些偷工减料的产品,市场用户终究是会渐渐明白性价比的,国家也不会允许你们将三废如此偷排放的,因为你们的子孙后代终究还是需要这个地球,需要这份空气,需要一些干净的水源。
还有也顺便敬告广大用户,控制采购成本是需要专业技术为基础的,一味的打压供应商产品价格,您就不怕搬了石头砸自己的脚?买的终究没有卖的精,你那些所谓的节约降低采购成本,是否用专业数据统计过,您的使用成本?离子交换树脂最大的特点就是可以重复使用,如果在重复使用中,制水量不足,再生频率变高,酸碱耗水耗以及人工成本是否一一统计了?
最后呼吁国家废除现有招投标制度,因为现有的招投标法,已经严重被滥用,集体拍板也就是集体承担责任,其实也意味着没有人会去承担责任。国内市场持续十多年的低价恶性竞争,所谓的层层审批制度,这类制度成为了大众创新万众创业的拦路虎绊脚石,因为一些创新技术是需要终端市场去尝试的,其中必然存在失败的概率,而现如今,反腐让您怠工,招投标让您不愿去学习研究技术,长久如此下去,您的不进步,让我失去了为您提供服务的同时,也丧失了国内整个实体经济的良性有效持续发展的机会。
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