tag:blogger.com,1999:blog-8964719845369935777.post8409796219386798487..comments2024-03-27T21:23:40.339-04:00Comments on Chemjobber: Process Wednesday: the 20,001st timeChemjobberhttp://www.blogger.com/profile/15932113680515602275noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-8964719845369935777.post-31491237185086974382012-08-15T13:20:45.229-04:002012-08-15T13:20:45.229-04:00Q, I really, really, really wish I didn't know...Q, I really, really, really wish I didn't know what you mean. But I do. Chemjobberhttps://www.blogger.com/profile/15932113680515602275noreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-7387519338910556562012-08-15T13:17:01.226-04:002012-08-15T13:17:01.226-04:00Always expect the unexpected.
I had several "...Always expect the unexpected.<br />I had several "surprises" due to false manipulation by plant workers or chemical suppliers. One sits well in my memory: We were in the control room of a custom manufacturer. We had to transfer 10Cubic meters of reaction mixture to another reactor. The operator could not get the reactor pressure above 0,5 Bar. I said "why don't you go and look?" He said "It's ok." and continued to apply nitrogen. So I went and looked, there it was the reaction mixture spewing out of an intake valve. Anyway we got it sorted, turned out that the operator had not replaced the cap properly after removing the pH electrode. <br />I never thought that could happen, but I wrote it into the pilot plant procedure and introduced it into the safety analysis.<br />Shit.<br />Quintusnoreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-86858798739585222632012-08-15T11:15:36.974-04:002012-08-15T11:15:36.974-04:00You should look up the Texas City harbor ship expl...You should look up the Texas City harbor ship explosion to see what can happen when safe ammonium sulfate/nitrate mixtures explode. The volumes "Chemistry and Technology of Explosives" have several colorful stories of safe plants going up in smoke. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-14381211755304124422012-08-15T10:34:07.515-04:002012-08-15T10:34:07.515-04:00Re: bridging/sticking: I used to work with chemica...Re: bridging/sticking: I used to work with chemical engineers who were working with powders, etc., and they would have problems with this in their lab scale equipment in the pipes/chutes. Their solution? Rubber mallets. <br /><br />Chemjobberhttps://www.blogger.com/profile/15932113680515602275noreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-76384595912179967242012-08-15T10:32:41.921-04:002012-08-15T10:32:41.921-04:00That is one freaking huge crater! That is one freaking huge crater! Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8964719845369935777.post-88849399928245746942012-08-15T10:28:15.930-04:002012-08-15T10:28:15.930-04:00I'm fairly new to this field as well, but I...I'm fairly new to this field as well, but I've never seen small charges of dynamite as a process parameter in any of our QbD work. We've got an API that's bridging and sticking in the feeder going into a granulator - I'll have to suggest this.CanChemnoreply@blogger.com