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Language="Javascript" Src="/item/GetHits.asp?Action=Count&GetFlag=0&m=1&ID=1136"></Script>次 <script type="text/javascript" language="javascript"> function ContentSize(size) {document.getElementById('MyContent').style.fontSize=size+'px';} </script> 字體：<a href="javascript:ContentSize(16)">大</a> <a href="javascript:ContentSize(14)">中</a> <a href="javascript:ContentSize(12)">小</a> </div> <div style="margin-top:20px;"><div class="4wfm99u" id="MyContent"><p> 當(dāng)濾漿中含有極細(xì)的顆粒時(shí)，在濾過介質(zhì)上構(gòu)成了致密的細(xì)孔道的濾餅，或梗塞過濾介質(zhì)的孔道，使濾過無法進(jìn)行。別的當(dāng)濾漿中含有粘性或膠凝性或高度可緊縮性 顆粒時(shí)，構(gòu)成的濾餅對濾液的阻力很大。這時(shí)可將某種質(zhì)堅(jiān)固的能構(gòu)成松散濾渣的另一種固體顆粒參加濾漿中，或用濾漿將其制成糊狀物輔在過濾介質(zhì)上，以構(gòu)成較 松散的濾餅，使濾液得以暢流，這種固體顆粒稱為<strong>助濾劑</strong>。<br/><br/> 助濾劑的效果是削減過濾阻力，進(jìn)步過濾速度和澄明度。助濾劑應(yīng)是化學(xué)不變的、不溶性的、堅(jiān)固的、外形不規(guī)矩的細(xì)顆粒，可構(gòu)成構(gòu)造松散并且簡直不成緊縮的濾餅。<br/><br/> ?。ㄒ唬┏Ｓ弥鸀V劑<br/><br/> 信陽中凱<a href="http://m.plotthemovie.com">珍珠巖</a>助濾劑系由珍珠巖加工制成的一種外形不規(guī)矩的多孔顆粒，首要成分為SiO2，有較高的惰性和不溶性，能構(gòu)成堅(jiān)固的不成緊縮的濾餅，是常用的助濾劑。<br/><br/> 滑石粉吸附性小對膠質(zhì)渙散效果好，能吸附水溶液中過量揮發(fā)油和一些色素，合用于含粘液、樹膠較多的濾液過濾。別的，用揮發(fā)油制備芬芳水劑時(shí)，常用滑石粉作 助濾劑。需留意的是，滑石粉很細(xì)，不易濾清。</p><p> 活性碳常用于打針劑的濾過，具有很強(qiáng)的吸附性，能吸附熱原、微生物并具有脫色效果。但本品能吸附藥物，特殊是生物堿類，使用時(shí)要留意用量。 紙漿有助濾和脫水效果，在中藥打針劑出產(chǎn)中運(yùn)用較廣，特殊用于處置某些難以濾清的藥液。<br/><br/> ?。ǘ┲鸀V劑的運(yùn)用辦法<br/><br/> ?。?）將信陽中凱珍珠巖助濾劑中加至濾漿中，攪拌平均后過濾，使助濾劑在過濾介質(zhì)上構(gòu)成多孔、松散的濾餅，重復(fù)過濾以獲得澄明溶液。這種辦法合適濾漿中固體含量少，特殊是含有粘性或膠凝性物質(zhì)，助濾劑用量為0.1-0.5%.<br/><br/> （2）將信陽中凱珍珠巖助濾劑用過量的濾漿制成糊狀物，加至過濾介質(zhì)上，抽濾使成1-5mm厚的助濾劑堆積層，然后過濾藥液。這種過濾辦法可避免過濾介質(zhì)孔道被細(xì)顆?；蛘持锕Ｈ?，過濾初期就可獲得澄明溶液。也可將（1）、（2）辦法聯(lián)用。<br/><br/> 信陽中凱珍珠巖助濾劑的用量對過濾速度的影響（工業(yè)藥劑學(xué)）.跟著助濾劑用量添加，過濾速度添加，但超越合用量，常招致濾速減慢，并且澄明度也未改善。因而，運(yùn)用助濾劑時(shí)經(jīng)由實(shí)驗(yàn)，以確定其適宜用量。</p></div> </div> <div style="background-color:#F7F7F7;margin-top:15px;padding:10px;">上一條：<a href="/html/xwzx/jszs/1134.html" 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