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振動篩在植酸提煉工藝中的應用

本文(wen)摘要：　　植酸(suan)(suan)振(zhen)動(dong)篩(shai)(shai)-（振(zhen)動(dong)篩(shai)(shai)）在(zai)植酸(suan)(suan)提煉工藝工藝中(zhong)的應(ying)用(yong)(yong)。植酸(suan)(suan)主要是從米(mi)糠中(zhong)提取出來(lai)的。植酸(suan)(suan)的提取工藝中(zhong)一個流(liu)程(cheng)就是篩(shai)(shai)分，用(yong)(yong)20目的振(zhen)動(dong)篩(shai)(shai)篩(shai)(shai)網。下邊(bian)就看(kan)一下植酸(suan)(suan)專用(yong)(yong)振(zhen)動(dong)篩(shai)(shai)分過濾機(ji)在(zai)植酸(suan)(suan)提取工藝中(zhong)的應(ying)用(yong)(yong)。...

　　植酸振動篩-（振動篩）在植酸提煉工藝工藝中的應用。植酸主要是從米糠中提取出來的。植酸的提取工藝中第一個流程就是篩分，用20目的振動篩篩網。下邊就看一下植酸專用振動篩分過濾機在植酸提取工藝中的應用。
　　植酸是一種罕見的金屬螯合劑，當與金屬絡合時，易形成多個螯合環，所形成的絡合物在廣泛的pH值范圍內皆具有較強的穩定性，植酸在金屬表面同金屬絡合時，易形成一層致密的單分子有機保護膜，能有效地阻止O2等進入金屬表面，從而抑制金屬的腐蝕，同時由于膜層與有機涂料具有相近的化學性質，并含有羥基和磷酸基等活性基團，能與有機涂料發生化學作用，因此植酸處理過的金屬表面與涂料有更強的粘接性能。

　　原料：米糠

　　試劑：鹽酸(suan)(化學純)、石(shi)灰(化學純)、NaOH(化學純)、732強酸(suan)性陽離(li)子(zi)交(jiao)換(huan)樹脂．

　　儀(yi)器：721分光光度計、離子交(jiao)換柱、抽濾裝(zhuang)置、離心機、可(ke)控(kong)電爐、攪拌器、濃(nong)縮儀(yi)．

　　方法與步驟(zou)：取粉碎后經振動篩篩分(fen)約20目的(de)米糠，加6倍(bei)量的(de)水(shui)．用(yong)7％鹽(yan)(yan)酸(suan)(suan)(suan)，調PH至(zhi)1.5～2，于(yu)25℃左右攪(jiao)拌浸(jin)(jin)漬(zi)．抽濾(lv)(lv)，用(yong)1.2％鹽(yan)(yan)酸(suan)(suan)(suan)洗(xi)渣、棄渣，合并濾(lv)(lv)液(ye)(ye)(ye)．往浸(jin)(jin)出(chu)液(ye)(ye)(ye)中(zhong)加石灰(hui)中(zhong)和至(zhi)PH值約6.5，得(de)(de)(de)植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)鈣沉(chen)淀靜止1h，抽濾(lv)(lv)，棄濾(lv)(lv)液(ye)(ye)(ye)再用(yong)蒸(zheng)餾水(shui)洗(xi)滌(di)所(suo)得(de)(de)(de)沉(chen)淀物(wu)2～3次，得(de)(de)(de)凈化(hua)的(de)植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)鈣．往所(suo)得(de)(de)(de)植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)鈣中(zhong)加少量稀(xi)(xi)鹽(yan)(yan)酸(suan)(suan)(suan)并調成稀(xi)(xi)漿(jiang)狀，稍后加入(ru)2／3倍(bei)量氫型強(qiang)酸(suan)(suan)(suan)性陽離(li)(li)子(zi)(zi)交(jiao)換(huan)(huan)樹脂(zhi)．微攪(jiao)0.5h，使植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)鈣溶(rong)(rong)(rong)(rong)轉成可(ke)溶(rong)(rong)(rong)(rong)性鹽(yan)(yan)溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)．抽濾(lv)(lv)、洗(xi)凈，分(fen)離(li)(li)，得(de)(de)(de)含(han)雜質(zhi)的(de)植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)．保留，供下(xia)步離(li)(li)子(zi)(zi)交(jiao)換(huan)(huan)制(zhi)植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)用(yong)1．3．2 植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)的(de)制(zhi)取將溶(rong)(rong)(rong)(rong)轉所(suo)得(de)(de)(de)的(de)可(ke)溶(rong)(rong)(rong)(rong)性植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)鹽(yan)(yan)溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)遙人(ren)離(li)(li)子(zi)(zi)交(jiao)換(huan)(huan)柱，控制(zhi)流速進行離(li)(li)子(zi)(zi)交(jiao)換(huan)(huan)．此時，溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)中(zhong)的(de)Mg2+、Ca2+等雜質(zhi)離(li)(li)子(zi)(zi)被(bei)交(jiao)換(huan)(huan)到RH+樹脂(zhi)上，H+離(li)(li)子(zi)(zi)被(bei)交(jiao)換(huan)(huan)下(xia)來(lai)并與植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)根離(li)(li)子(zi)(zi)一道流出(chu)由于(yu)Mg2+、Ca2+離(li)(li)子(zi)(zi)與RH 樹脂(zhi)的(de)交(jiao)換(huan)(huan)能力是Mg2+ 將植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)稀(xi)(xi)溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)用(yong)約1％量的(de)活性炭(tan)脫色1～2次，分(fen)離(li)(li)，再將脫色液(ye)(ye)(ye)減壓蒸(zheng)發(fa)濃縮，控溫(wen)70～80℃左右，至(zhi)瓶(ping)內溶(rong)(rong)(rong)(rong)液(ye)(ye)(ye)呈稀(xi)(xi)稠(chou)狀，植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)含(han)量在75％以上即(ji)為植(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)酸(suan)(suan)(suan)產品．

　　即：米糠粉碎→粉碎料(liao)酸浸(jin)、（振動篩分過(guo)濾(lv)機）過(guo)濾(lv)→浸(jin)出(chu)液堿中和→植(zhi)(zhi)酸鈣沉淀浸(jin)溶(rong)→植(zhi)(zhi)酸鹽溶(rong)液離子交換→植(zhi)(zhi)酸稀溶(rong)液蒸發濃縮→植(zhi)(zhi)酸產品

　　米糠中(zhong)植(zhi)酸(suan)含量和成品中(zhong)植(zhi)酸(suan)含量采用鉬藍法測定，用抗(kang)壞血酸(suan)作還原劑．

　　植酸作為螯合劑(ji)(ji)(ji)、抗氧化(hua)劑(ji)(ji)(ji)、保鮮劑(ji)(ji)(ji)、護色劑(ji)(ji)(ji)、水的軟化(hua)劑(ji)(ji)(ji)、發(fa)酵促(cu)進劑(ji)(ji)(ji)、金屬(shu)防腐防蝕劑(ji)(ji)(ji)等廣泛用于(yu)食品、醫藥(yao)、油漆涂料(liao)、日用化(hua)工、金屬(shu)加工、紡織(zhi)工業、塑料(liao)工業及(ji)高分子工業等行(xing)業領(ling)域。