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性高湖婬AAA片A片美国,日日碰狠狠躁久久躁9,两个女人互添下身高潮,国产成人小视频,jiucao

攪拌器分類及磁力攪拌器的使用說明

2021-01-11 17:24:43 jssjzn 30

攪拌(ban)器是(shi)有機化(hua)(hua)學(xue)實驗必(bi)不可少的儀(yi)器之一,它可使反應混(hun)合物混(hun)合得(de)更(geng)加(jia)均(jun)(jun)(jun)勻,反應體系的溫度更(geng)加(jia)均(jun)(jun)(jun)勻,從(cong)而有利于化(hua)(hua)學(xue)反應的進行(xing)特別是(shi)非均(jun)(jun)(jun)相(xiang)反應。

攪拌器是有機化學(xue)實驗(yan)必不可少的(de)儀器之一,它可使反(fan)應(ying)混合(he)物混合(he)得更(geng)加(jia)均勻,反(fan)應(ying)體系的(de)溫(wen)度更(geng)加(jia)均勻,從而有利(li)于化學(xue)反(fan)應(ying)的(de)進行特別(bie)是非均相反(fan)應(ying)。

攪拌(ban)(ban)的方法有三(san)種:人工攪拌(ban)(ban)、磁力攪拌(ban)(ban)、機械攪拌(ban)(ban)。

人工(gong)攪(jiao)(jiao)拌(ban)(ban)(ban)一(yi)般借助(zhu)于(yu)玻棒就(jiu)可以進行,磁(ci)力(li)攪(jiao)(jiao)拌(ban)(ban)(ban)是(shi)(shi)利(li)用(yong)(yong)磁(ci)力(li)攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi),機械攪(jiao)(jiao)拌(ban)(ban)(ban)則(ze)是(shi)(shi)利(li)用(yong)(yong)機械攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi)。磁(ci)力(li)攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi)由于(yu)磁(ci)力(li)攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi)容易安裝,因此,它可以用(yong)(yong)來進行連續攪(jiao)(jiao)拌(ban)(ban)(ban)尤其當反應量比(bi)較(jiao)少或在反應是(shi)(shi)在密閉條件(jian)下進行,磁(ci)力(li)攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi)的(de)(de)使用(yong)(yong)更(geng)為方便。但缺點(dian)是(shi)(shi)對于(yu)一(yi)些粘稠液或是(shi)(shi)有大量固體參加或生成的(de)(de)反應,磁(ci)力(li)攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi)無法(fa)順利(li)使用(yong)(yong),這(zhe)時就(jiu)應選(xuan)用(yong)(yong)機械攪(jiao)(jiao)拌(ban)(ban)(ban)器(qi)作為攪(jiao)(jiao)拌(ban)(ban)(ban)動力(li)。

磁(ci)(ci)力攪拌器是(shi)(shi)利(li)用磁(ci)(ci)場的(de)轉動(dong)來帶動(dong)磁(ci)(ci)子(zi)的(de)轉動(dong)。磁(ci)(ci)子(zi)是(shi)(shi)在一(yi)小(xiao)塊金屬用一(yi)層惰性材料(如聚四氟乙烯(xi)等)包裹著的(de),兩(liang)端(duan)封口。一(yi)般情況下(xia)磁(ci)(ci)子(zi)的(de)大(da)小(xiao)大(da)約有10mm、20mm、30mm長,當然還有更長的(de)磁(ci)(ci)子(zi),磁(ci)(ci)子(zi)的(de)形(xing)(xing)狀有圓(yuan)柱形(xing)(xing)、橢圓(yuan)形(xing)(xing)和(he)圓(yuan)形(xing)(xing)等,可以根(gen)據實(shi)驗的(de)規模來選用。

機(ji)械(xie)(xie)攪(jiao)(jiao)(jiao)拌(ban)(ban)器機(ji)械(xie)(xie)攪(jiao)(jiao)(jiao)拌(ban)(ban)器主要(yao)包括三(san)部分(fen):電動(dong)(dong)(dong)機(ji)、攪(jiao)(jiao)(jiao)拌(ban)(ban)棒和(he)攪(jiao)(jiao)(jiao)拌(ban)(ban)密(mi)封裝置(zhi)。電動(dong)(dong)(dong)機(ji)是動(dong)(dong)(dong)力(li)部分(fen),固定在支(zhi)架上(shang),由調速器調節其轉動(dong)(dong)(dong)快慢。攪(jiao)(jiao)(jiao)拌(ban)(ban)棒與電動(dong)(dong)(dong)機(ji)相連,當接通電源(yuan)后,電動(dong)(dong)(dong)機(ji)就帶動(dong)(dong)(dong)攪(jiao)(jiao)(jiao)拌(ban)(ban)棒轉動(dong)(dong)(dong)而進行(xing)攪(jiao)(jiao)(jiao)拌(ban)(ban),攪(jiao)(jiao)(jiao)拌(ban)(ban)密(mi)封裝置(zhi)是攪(jiao)(jiao)(jiao)拌(ban)(ban)棒與反應器連接的(de)(de)裝置(zhi),它可以使(shi)反應在密(mi)封體系中進行(xing)。攪(jiao)(jiao)(jiao)拌(ban)(ban)的(de)(de)效(xiao)率在很大(da)程度上(shang)取決于攪(jiao)(jiao)(jiao)拌(ban)(ban)棒的(de)(de)結構,介紹的(de)(de)老式(shi)攪(jiao)(jiao)(jiao)拌(ban)(ban)棒是用粗玻璃棒制成的(de)(de)。根據(ju)反應器的(de)(de)大(da)小(xiao)、形狀、瓶(ping)口(kou)的(de)(de)大(da)小(xiao)及反應條(tiao)件(jian)的(de)(de)要(yao)求(qiu),選擇較為合適的(de)(de)攪(jiao)(jiao)(jiao)拌(ban)(ban)棒。

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