Re: [biofuel] Using KOH
Most KOH assays out at 90-92%. I presume that much the same can be said for NaOH, or at least that the assay is relatively constant for Red Devil lye and other sources. It's doubtful that the impurity aspect has ever been taken into account in all the "3.5 gram" formulations. What has probably been found is that 3.5 grams of "stuff" works well, which could mean that only ~90 of that 3.5 grams was actually NaOH. Since it's also rather doubtful that anyone is ever going to be working with "100% pure" catalyst outside of a laboratory invironment, that leaves everything else up to the fates and "relativity." Which makes sampling before large batches or ever time a new supply of catalyst comes in all the more important. Enter "The Poor Man's [Person's] Titration," http://groups.yahoo.com/group/Biodiesel/message/3891 Todd Swearingen - Original Message - From: "Keith Addison" <[EMAIL PROTECTED]> To: Sent: Wednesday, March 12, 2003 9:17 AM Subject: [biofuel] Using KOH > Cross-posting... > > >To: [EMAIL PROTECTED] > >From: "girl_mark_fire" <[EMAIL PROTECTED]> > >Date: Wed, 12 Mar 2003 07:03:51 - > >Subject: [Biodiesel] Re: I'm Baaa-aaack!!! > > > >A local chemist friend of mine said that the adulturants in less-than- > >pure KOH is frequently NaOH. I can't easily get an assay on the KOH > >I've got. Does anyone have any info on how often this actually > >happens? > > > >Here's why I'm bringing it up: People frequently suggest doing a > >little math to determine how much KOH to use when working with lower > >grades of it, such as 80% pure. Obviously titration will tell you > >about any extra needed for the ffa- but you have to calculate the > >base amount up from the 4.9 grams if working with low purity KOH. I > >would think that if the assay on the chemical is high in NaOH, it > >would throw your calulations way off because that NaOH will also > >react- thus giving you a more potent KOH than you think you have. Any > >thoughts, and do any of you know much about how frequent this NaOH > >adulturation is? How much of a difference would 20% NaOH make in a > >drum-sized batch anyway? > > > >mark > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [biofuel] Using KOH
When you do the titration you are finding the concentration of OH...both potassium and sodium hydroxide.. I dont think there is a problem in this case. John Busby - Original Message - From: "Keith Addison" <[EMAIL PROTECTED]> To: Sent: Wednesday, March 12, 2003 8:17 AM Subject: [biofuel] Using KOH > Cross-posting... > > >To: [EMAIL PROTECTED] > >From: "girl_mark_fire" <[EMAIL PROTECTED]> > >Date: Wed, 12 Mar 2003 07:03:51 - > >Subject: [Biodiesel] Re: I'm Baaa-aaack!!! > > > >A local chemist friend of mine said that the adulturants in less-than- > >pure KOH is frequently NaOH. I can't easily get an assay on the KOH > >I've got. Does anyone have any info on how often this actually > >happens? > > > >Here's why I'm bringing it up: People frequently suggest doing a > >little math to determine how much KOH to use when working with lower > >grades of it, such as 80% pure. Obviously titration will tell you > >about any extra needed for the ffa- but you have to calculate the > >base amount up from the 4.9 grams if working with low purity KOH. I > >would think that if the assay on the chemical is high in NaOH, it > >would throw your calulations way off because that NaOH will also > >react- thus giving you a more potent KOH than you think you have. Any > >thoughts, and do any of you know much about how frequent this NaOH > >adulturation is? How much of a difference would 20% NaOH make in a > >drum-sized batch anyway? > > > >mark > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[biofuel] Using KOH
Cross-posting... >To: [EMAIL PROTECTED] >From: "girl_mark_fire" <[EMAIL PROTECTED]> >Date: Wed, 12 Mar 2003 07:03:51 - >Subject: [Biodiesel] Re: I'm Baaa-aaack!!! > >A local chemist friend of mine said that the adulturants in less-than- >pure KOH is frequently NaOH. I can't easily get an assay on the KOH >I've got. Does anyone have any info on how often this actually >happens? > >Here's why I'm bringing it up: People frequently suggest doing a >little math to determine how much KOH to use when working with lower >grades of it, such as 80% pure. Obviously titration will tell you >about any extra needed for the ffa- but you have to calculate the >base amount up from the 4.9 grams if working with low purity KOH. I >would think that if the assay on the chemical is high in NaOH, it >would throw your calulations way off because that NaOH will also >react- thus giving you a more potent KOH than you think you have. Any >thoughts, and do any of you know much about how frequent this NaOH >adulturation is? How much of a difference would 20% NaOH make in a >drum-sized batch anyway? > >mark Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
