旋轉蒸發器的使用方法與注意事項
瀏覽次數:893發布日期:2023-10-09
旋轉蒸發器我們平時主要用(yong)于在(zai)(zai)(zai)需要減壓條件下連續蒸(zheng)(zheng)餾大量易揮發性溶劑。特別是(shi)對(dui)萃(cui)取液的濃縮和色譜分(fen)離(li)時的接(jie)收液的蒸(zheng)(zheng)餾,這樣(yang)可以分(fen)離(li)和純(chun)化反應產物。旋(xuan)轉蒸(zheng)(zheng)發器的工作原理(li)機制也就是(shi)在(zai)(zai)(zai)減壓蒸(zheng)(zheng)餾,換(huan)句話說(shuo)在(zai)(zai)(zai)減壓情況下,當溶劑蒸(zheng)(zheng)餾時,蒸(zheng)(zheng)餾燒瓶(ping)在(zai)(zai)(zai)不停的旋(xuan)轉。

旋轉蒸發(fa)器我們平時(shi)(shi)主要用(yong)(yong)于(yu)在(zai)(zai)(zai)需要減(jian)(jian)壓(ya)(ya)(ya)條件下連(lian)續蒸(zheng)(zheng)餾(liu)(liu)大(da)量易揮發(fa)性(xing)溶(rong)劑(ji)(ji)。特別是對(dui)萃取(qu)液(ye)(ye)的濃縮和(he)(he)色譜分離(li)時(shi)(shi)的接(jie)收(shou)液(ye)(ye)的蒸(zheng)(zheng)餾(liu)(liu),這(zhe)樣可(ke)以分離(li)和(he)(he)純化反應(ying)產物。旋轉(zhuan)(zhuan)蒸(zheng)(zheng)發(fa)器的工(gong)作(zuo)原理(li)(li)機制也就是在(zai)(zai)(zai)減(jian)(jian)壓(ya)(ya)(ya)蒸(zheng)(zheng)餾(liu)(liu),換(huan)句話說在(zai)(zai)(zai)減(jian)(jian)壓(ya)(ya)(ya)情況下,當(dang)溶(rong)劑(ji)(ji)蒸(zheng)(zheng)餾(liu)(liu)時(shi)(shi),蒸(zheng)(zheng)餾(liu)(liu)燒(shao)(shao)(shao)瓶(ping)在(zai)(zai)(zai)不停的轉(zhuan)(zhuan)動(dong)(dong)。旋轉(zhuan)(zhuan)蒸(zheng)(zheng)發(fa)器的物理(li)(li)結構(gou):里面的蒸(zheng)(zheng)餾(liu)(liu)燒(shao)(shao)(shao)瓶(ping)可(ke)是一(yi)(yi)個帶(dai)有(you)標準磨口(kou)接(jie)口(kou)的梨形或圓底燒(shao)(shao)(shao)瓶(ping),這(zhe)樣通(tong)過(guo)一(yi)(yi)高度(du)回流蛇形冷凝管與(yu)(yu)減(jian)(jian)壓(ya)(ya)(ya)泵相(xiang)連(lian),回流冷凝管另一(yi)(yi)開口(kou)與(yu)(yu)帶(dai)有(you)磨口(kou)的接(jie)收(shou)燒(shao)(shao)(shao)瓶(ping)相(xiang)連(lian),用(yong)(yong)于(yu)接(jie)收(shou)被蒸(zheng)(zheng)發(fa)的有(you)機溶(rong)劑(ji)(ji)。在(zai)(zai)(zai)冷凝管與(yu)(yu)減(jian)(jian)壓(ya)(ya)(ya)泵之間有(you)一(yi)(yi)三通(tong)活塞(sai),當(dang)體(ti)系與(yu)(yu)大(da)氣相(xiang)通(tong)時(shi)(shi),可(ke)以將(jiang)蒸(zheng)(zheng)餾(liu)(liu)燒(shao)(shao)(shao)瓶(ping),接(jie)液(ye)(ye)燒(shao)(shao)(shao)瓶(ping)取(qu)下,轉(zhuan)(zhuan)移溶(rong)劑(ji)(ji),當(dang)體(ti)系與(yu)(yu)減(jian)(jian)壓(ya)(ya)(ya)泵相(xiang)通(tong)時(shi)(shi),則體(ti)系應(ying)處于(yu)減(jian)(jian)壓(ya)(ya)(ya)狀態。使用(yong)(yong)時(shi)(shi),應(ying)先減(jian)(jian)壓(ya)(ya)(ya),再開動(dong)(dong)電動(dong)(dong)機轉(zhuan)(zhuan)動(dong)(dong)蒸(zheng)(zheng)餾(liu)(liu)燒(shao)(shao)(shao)瓶(ping),結束時(shi)(shi),應(ying)先停機,再通(tong)大(da)氣,以防蒸(zheng)(zheng)餾(liu)(liu)燒(shao)(shao)(shao)瓶(ping)在(zai)(zai)(zai)轉(zhuan)(zhuan)動(dong)(dong)中脫落。作(zuo)為蒸(zheng)(zheng)餾(liu)(liu)的熱源,常配有(you)相(xiang)應(ying)的恒溫(wen)水槽。
使用方法:
1.開機前先將調速旋鈕左旋到zui小,按下電源開關指示燈亮,然后慢慢往右旋至所需要的轉速,一般大蒸發瓶用中,低速,粘度大的溶液用較低轉速.燒瓶是標準接口24號,隨機附500ml,1000ml兩種燒瓶,溶液量一般不超過50%為適宜.
2.冷凝器上有兩個外接頭是接冷卻水用的,一頭接進水,另一頭接出水,一般接自來水,冷凝水溫度越低效果越好.上端口裝抽真空接頭,接真空泵皮管抽真空用的.
3. 高低調節:手動升降,轉動機柱上面手輪,順轉為上升,逆轉為下降. 電動升降,手觸上升鍵主機上升,手觸下降鍵主機下降.
注意事項:
1.如真空抽不上來需檢查 :各接頭,接口是否密封 ;密封圈,密封面是否有效 ;主軸與密封圈之間真空脂是否涂好 ;真空泵及其皮管是否漏氣;玻璃件是否有裂縫,碎裂,損壞的現象
2.各磨口,密封面密封圈及接頭安裝前都需要涂一層真空脂.
3.加熱槽通電前必須加水,不允許無水干燒.
4.擰入保險孔內保險,以免損壞燒瓶.
5.玻璃零件接裝應輕拿輕放,裝前應洗干凈,擦干或烘干