tag:blogger.com,1999:blog-8964719845369935777.post3824311059420418250..comments2024-03-27T21:23:40.339-04:00Comments on Chemjobber: Process Wednesday: electrostatics and your glass-lined reactorsChemjobberhttp://www.blogger.com/profile/15932113680515602275noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-8964719845369935777.post-13337858953442347852012-04-29T20:57:33.320-04:002012-04-29T20:57:33.320-04:00"I'm sure there's a scaling reason as..."I'm sure there's a scaling reason as to why we tend not to worry about these sorts of things in lab-scale reactions."<br /><br />The size and intensity of the resulting deflagration or detonation has a lot to do with it.Suenoreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-34160967725806258142012-04-18T10:58:23.850-04:002012-04-18T10:58:23.850-04:00This is a point often missed in early scale-up. We...This is a point often missed in early scale-up. We usually don't mind using a 2 L separatory funnel in a hood and draining the bottom layer to a flask. <br /><br />However, falling liquids tend to pick up static charge, so this is a big no-no in a kilo lab (we stopped open draining at 2 L). Using a graphite filled PTFE tubing (or PTFE tubing with conductive stripes) to drain a reactor and blanketing the receiving vessel helps a lot.Slawomirnoreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-5238149521660614082012-04-18T10:35:45.918-04:002012-04-18T10:35:45.918-04:00Electrostatic charge is the root cause of many exp...Electrostatic charge is the root cause of many explosions. At the petrol station, flour mill, coal mine it is very dangerous. <br />In the research lab if you are running a largish column to get your 50g for box. the you may use larger quantities of such solvents. Add an antistatic agent, please, or earth your system.<br />I attended several safety courses where such effects were impressively demonstrated.Quintusnoreply@blogger.com