propane as inert atmosphere? , Hive Chemicals & Equipment
 
    xxxxx 05-14-04 18:55
       <a href="https://www.the-hive.ws/forum/showflat.pl?Number=507147&page=7&view=&sb=&Search=&vc=&new=&start=0&xrated=y&&URLForums=" title="Click here to show this downrated post">propane as inert atmosphere?</a> <br> <i title="This post has been downrated by the moderators">(Rated as: hazardous)</i> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post507162"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> <font color="#FF0033">Rhodium</font><br> <i>(<span title="The user's title at the time of posting">Chief Bee</span>)</i><br> <span title="Posting date">05-14-04 20:14</span><br> <span title="Link to this post by using the markup [507162]">No 507162</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Insane idea!</b> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Propane is far from inert - it is a major explosion hazard! The added sulfur compounds are added for you to become <b>alarmed</b> by the fact that some of the gas has escaped into the room. <br> <span title="The signature"><hr><sup>The Hive - Clandestine Chemists Without Borders</sup></span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post507187"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> xxxxx<br> <i>(<span title="The user's title at the time of posting">Newbee</span>)</i><br> <span title="Posting date">05-14-04 22:20</span><br> <span title="Link to this post by using the markup [507187]">No 507187</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">what i meant was...</b> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> since many reactions involve hot volatile organic liquids which are at least equally as flammable as propane, i am assuming that it would be possible to avoid igniting the propane accidentally. for safety the propane could be passed through two wash bottles and burned, if it could not be released to the atmosphere. i did not mean to suggest it would be appropriate to fill an enclosed space with the entire contents of a propane cylinder. what i wanted to ask is if it not possible to obtain a cylinder of nitrogen or argon (and the guys selling those cylinders know what they are being used for) which reactions could use propane instead to exclude oxygen. </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post507200"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> methyl_ethyl<br> <i>(<span title="The user's title at the time of posting">Guardian</span>)</i><br> <span title="Posting date">05-15-04 00:02</span><br> <span title="Link to this post by using the markup [507200]">No 507200</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">assumption</b> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> <font color="blue">i am assuming that it would be possible to avoid igniting the propane accidentally</font color="blue"><br><br>Regardless, propane creates explosive atmospheres at quite low concentrations I think around 2% lower limit, (wild guess).<br><br>Never use explosive gases for inert atmospheres.<br><br><b>Period</b> <br> <span title="The signature"><hr>     Unipolar Mania, It's good for life... <img src="../forum/images/icons_lightgrey/laugh.gif" alt="laugh" title="Laugh" heigth="15" width="15"></span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post507201"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> Barium<br> <i>(<span title="The user's title at the time of posting">Heavyweight Chempion(eer)</span>)</i><br> <span title="Posting date">05-15-04 00:03</span><br> <span title="Link to this post by using the markup [507201]">No 507201</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Sure</b> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Propane is inert towards many reactions. You can use hydrogen as a inert gas too. It is just a matter of knowing what you are doing. But for any of your applications what is the problem using nitrogen? It is pretty much as fuck up-proof as you can get.<br><br><font color="blue">for safety the propane could be passed through two wash bottles and burned</font color="blue"><br>You have obviously not worked with inert enviroment considering the kind of flow-rate you are suggesting. So, on second thought, <i>do</i> invest in a nitrogen tank. If not for the sake of your neighbourhood. <br> <span title="The signature"><hr>Severe Aztecoholic and President of Sooty's fanclub - Sooty for President!!</span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post507430"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> ning<br> <i>(<span title="The user's title at the time of posting">acetaminophanatic</span>)</i><br> <span title="Posting date">05-16-04 06:57</span><br> <span title="Link to this post by using the markup [507430]">No 507430</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">I like the idea</b> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> crazy though it may be.<br><br>Some reactions will react with nitrogen. Things dealing with metallic lithium, I guess. Anyway, it's OTC, and you <i>do</i> have a fume hood, right?<img src="../forum/images/icons_lightgrey/crazy.gif" alt="crazy" title="Crazy" heigth="15" width="15"><br><br>The explosive limits in air for propane are 2.1 - 9.5 %.<br><br>Honestly, I wouldn't consider a propane blanket any more dangerous than a refluxing grignard. Ether's pretty explosive too. Explodes in concentrations of 1.7 - 48 % with air. Much more explosive.<br><br>Anyway, hazardous, but I think something worth knowing<img src="../forum/images/icons_lightgrey/cool.gif" alt="cool" title="Cool" heigth="15" width="15"> <br> <span title="The signature"><hr><sub>...it's an AOL chatroom for dyslexic spider monkies...</sub></span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post507434"></a><a name="last"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> foxy2<br> <i>(<span title="The user's title at the time of posting">Fragile ego</span>)</i><br> <span title="Posting date">05-16-04 07:24</span><br> <span title="Link to this post by using the markup [507434]">No 507434</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">if it not possible to obtain a cylinder of...</b> </td> <td class="text_bg" align="right" valign="top">    </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> <font color="blue"> if it not possible to obtain a cylinder of nitrogen or argon (and the guys selling those cylinders know what they are being used for)</font color="blue"><br><br>Yes, Argon is very commonly used for mig/tig welding.  Nitrogen is used to charge tasty kegs of Stout, ala Guiness. I don't know what "guys" your talking about, but thats what the guys in my world think.  <br><br>And the other alternate is Helium, which as we all know is only used by clandistine chemists as an inert atmosphere, stay away from that one!!! <br> <span title="The signature"><hr><a href="http://www.democracynow.org/" target="_blank" title="Jump to this external site">http://www.democracynow.org/</a> - The Exception to the Rulers</span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> </body> </html>