Safety instruction
● please connected properly (see technical parameters), and ensure a good grounding!
● work, cooling water pipe and exhaust pipe should be kept unobstructed, no dead corner.
● The glass component installation pipeline, should adopt the method of rotating push installation, so as not to damage the glass parts.
● The use of flammable materials or organic solvents, please don't let the solution splash overflow, away from the fire and ready to take emergency measures.
● cleaning stubborn stains on the glass device, wipe clean with a rag, don't knock the glass with a hard object.
旋蒸常見(jiàn)故障解答
旋蒸出來(lái)的溶劑為什么到不了收集瓶
使用旋轉(zhuǎn)蒸發(fā)儀的時(shí)候真空度能到-0.1MPa,冷卻溫度也在-10度以下,但是為什么溶劑冷卻不到收集瓶里呢?是不是都被抽到真空泵里了?
答:
首先,確定溶劑已經(jīng)出來(lái)了沒(méi),
其次,溶劑的熔點(diǎn)是多少?若是易揮發(fā)的物質(zhì),肯定到泵里去了
對(duì)于低沸點(diǎn)的溶劑,不需要把真空度調(diào)得那么高的,如果溶劑太少的話,確實(shí)就被真空泵抽走,而收集不了。
真空度升高,溶劑的沸點(diǎn)會(huì)下降的。而你的表顯示已經(jīng)接近juedui真空了,所以沸點(diǎn)會(huì)很低的。例如:1atm下,水的沸點(diǎn)100度,而在0.05atm下,水的沸點(diǎn)也就在50-60度,主要是揮發(fā)度增大了。
河南金博儀器R系列旋轉(zhuǎn)蒸發(fā)儀使用方法:
⒈高低調(diào)節(jié):手動(dòng)升降,轉(zhuǎn)動(dòng)機(jī)柱上面手輪,順轉(zhuǎn)為上升,逆轉(zhuǎn)為下降.
電動(dòng)升降,手觸上升鍵主機(jī)上升,手觸下降鍵主機(jī)下降.
⒉冷凝器上有兩個(gè)外接頭是接冷卻水用的,一頭接進(jìn)水,另一頭接出水,一般接自來(lái)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.
⒊開(kāi)機(jī)前先將調(diào)速旋鈕左旋到zui小,按下電源開(kāi)關(guān)指示燈亮,然后慢慢往右旋至所需要的轉(zhuǎn)速,一般大蒸發(fā)瓶用中,低速,粘度大的溶液用較低轉(zhuǎn)速.燒瓶是標(biāo)準(zhǔn)接口24號(hào),隨機(jī)附燒瓶,溶液量一般不超過(guò)50%為適宜.
⒋使用時(shí),應(yīng)先減壓,再開(kāi)動(dòng)電機(jī)轉(zhuǎn)動(dòng)蒸餾燒瓶,結(jié)束時(shí),因先停電動(dòng)機(jī),再通大氣,以防蒸餾燒瓶在轉(zhuǎn)動(dòng)中脫落。