Re: [Biofuel] Titration question from a Newbie
Good Day to all, I have a question about the purity of Isopropyl alcohol. Will 90% yield good results or does it have to be 99%?? Isopropanol for titration is available from chemicals suppliers. Some people have used the other kind of Dri-Gas, which is isopropanol, but they found that it's unreliable. Best get 99% pure isopropanol from a chemicals supplier. 70% pure isopropanol is also said to work, but we found it didn't give satisfactory results. -- Make your own biodiesel The process Chemicals needed Chemicals for WVO http://journeytoforever.org/biodiesel_make.html See also: What should you do if your fuel doesn't pass the wash-test? http://journeytoforever.org/biodiesel_vehicle.html#whatdo Accurate measurements http://journeytoforever.org/biodiesel_make2.html#measure When newbies have problems making their first test batches and it doesn't pass the quality tests it's most often because of inaccurate measurements, or they didn't follow the instructions closely enough. Avoid variables. Have your test batches with new oil passed the quality tests yet? Best Keith ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
Re: [Biofuel] Titration question from a Newbie
I agree with Keith that it is best to 1. Use the best quality chemicals and measure accurately. (This will always be important, but absolutely crucial when doing small, initial test batches.) 2. Do not attempt to use WVO (and titration) until you have succeeded in making quality BD using virgin oil. (That said) For isopropanol, I now use a product called Iso Heet (Red Container; 12 fluid ounces/355ml)). It is 95% isopropanol. I get the same titration as with 99% iso purchased through a chemical supply company. The difference is the price. I pay about $2 (US) per 355ml vs. $8 + shipping for 250ml from the chemical supply source. + In the US many chemical suppliers will no longer ship to private residences. Warning: Not all gas line anti-freeze is created equal. I had a problem with something called Dri Gas. Although its label only listed isopropanol, the isopropanol itself titrated 6 or 7. Remember, start with small (1 L) test batches using virgin oil. Best Wishes for Your Success, Tom - Original Message - From: Keith Addison [EMAIL PROTECTED] To: biofuel@sustainablelists.org Sent: Thursday, May 03, 2007 7:17 AM Subject: Re: [Biofuel] Titration question from a Newbie Good Day to all, I have a question about the purity of Isopropyl alcohol. Will 90% yield good results or does it have to be 99%?? Isopropanol for titration is available from chemicals suppliers. Some people have used the other kind of Dri-Gas, which is isopropanol, but they found that it's unreliable. Best get 99% pure isopropanol from a chemicals supplier. 70% pure isopropanol is also said to work, but we found it didn't give satisfactory results. -- Make your own biodiesel The process Chemicals needed Chemicals for WVO http://journeytoforever.org/biodiesel_make.html See also: What should you do if your fuel doesn't pass the wash-test? http://journeytoforever.org/biodiesel_vehicle.html#whatdo Accurate measurements http://journeytoforever.org/biodiesel_make2.html#measure When newbies have problems making their first test batches and it doesn't pass the quality tests it's most often because of inaccurate measurements, or they didn't follow the instructions closely enough. Avoid variables. Have your test batches with new oil passed the quality tests yet? Best Keith ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/ ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
Re: [Biofuel] Titration question from a Newbie
On May 2, 2007, at 5:59 PM, shawn patrick wrote: I have a question about the purity of Isopropyl alcohol. Will 90% yield good results or does it have to be 99%?? The other responses are technically correct -- however, the isopropanol is only being used as a solvent for the FFAs in the oil you're testing, so it's not very critical. I had some gas-dry isopropanol that started to get slightly acidic after several months in the bottle. I started titrating the isopropanol first (without the oil), then adding the oil and titrating again. Worked fine, and added 20 sec. to the process. -K ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
[Biofuel] Titration question from a Newbie
Good Day to all, I have a question about the purity of Isopropyl alcohol. Will 90% yield good results or does it have to be 99%?? ___ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
[Biofuel] Titration question
Our Appleseed derived testbed reactor is now operational, and our longterm goal is to automate the heck out of the thing. Thus, I was pondering about how to automatically meter the correct amount of sodium methoxide into the reactor. My partner in crime is the electrical engineer in charge of that end of things, so I just need to figure out the chemistry bit. Anyway, if the pH of the diluted WVO is available, is titration still neccessary? That is, could one construct a simple conversion table wherein a sample pH of X requires Y grams of NaOH per liter? My gut tells me no, but I'm too many years removed from analytical chem to put my finger on why. I did find the following reference that suggests a titration free method is possible, albeit difficult: Kuselman et al. pH-metric determination of the acid value of vegetable oils without titration. J AOAC Int. 1998 Jul-Aug;81(4):873-9. Any thoughts? jh ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
[biofuel] Titration Question
The recipe seems clear on titrating: 10 ml isopropyl alcohol to 1 ml WVO. 1 ml is a VERY small amount. Is it the ratio that is important or is it important to use only those exact amounts? (i.e. if I double the amount but keep the ratio the same and then half the amount added to the batch of WVO, would that work as well? Kevin Yahoo! Groups Sponsor -~-- Make Money Online Auctions! Make $500.00 or We Will Give You Thirty Dollars for Trying! http://us.click.yahoo.com/yMx78A/fNtFAA/i5gGAA/FGYolB/TM -~- 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] Titration Question
The recipe seems clear on titrating: 10 ml isopropyl alcohol to 1 ml WVO. 1 ml is a VERY small amount. Is it the ratio that is important or is it important to use only those exact amounts? (i.e. if I double the amount but keep the ratio the same and then half the amount added to the batch of WVO, would that work as well? Kevin Hello Kevin See: http://journeytoforever.org/biodiesel_make2.html#bettertitrate Better titration Unless you have a very accurate scale, it's not easy to measure exactly 1 gram of sodium hydroxide. It's much easier to measure 5 gm than 1 gm, so mix 5 gm of sodium hydroxide with 500 milliliters of distilled or de-ionized water. Before titration measure out 5 ml of the stock solution, add 45 ml of distilled or de-ionized water. This makes a 0.1% lye solution. It's also not easy to measure exactly 1 milliliter of oil. Instead of the usual 1 ml of oil and 10 ml of isopropyl alcohol, mix 4 ml of oil in 40 ml of isopropyl alcohol in a glass beaker. Warm the mixture gently by standing the beaker in hot water, stir until all the oil disperses and it becomes a clear mixture. Then titrate as usual, measuring milliliters of stock solution used. When it reaches pH8.5 count up the number of milliliters used as normal and divide by 4. This will give a much more precise measurement. To save on isopropyl alcohol, use 2 ml of oil in 20 ml of isopropyl and divide the results by two -- still twice as accurate. Best Keith Yahoo! Groups Sponsor -~-- Make Money Online Auctions! Make $500.00 or We Will Give You Thirty Dollars for Trying! http://us.click.yahoo.com/yMx78A/fNtFAA/i5gGAA/FGYolB/TM -~- 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] Titration Question
On Tuesday, April 1, 2003, at 09:27 AM, intern99772003 wrote: The recipe seems clear on titrating: 10 ml isopropyl alcohol to 1 ml WVO. 1 ml is a VERY small amount. Is it the ratio that is important or is it important to use only those exact amounts? (i.e. if I double the amount but keep the ratio the same and then half the amount added to the batch of WVO, would that work as well? The amount of isopropanol is not important. The 1 ml of oil IS important to be accurate. One step I've started doing is titrating the alcohol all by itself (prior to adding the oil) with NaOH solution til you just get pink. Sometimes that can take a half-ml of NaOH soln., especially with old isopropanol. -K Yahoo! Groups Sponsor -~-- FREE Cell Phones with up to $400 Cash Back! http://us.click.yahoo.com/_bBUKB/vYxFAA/i5gGAA/FGYolB/TM -~- 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/
