To all, Thx all for the posts on solid cat.
I think I recall something from one of my classes (courses?) (...whatever they«re called), this year. In some place it mentioned the use of potassium methoxide (KGME, or CH3-O-CH2-CH2-OK) and KGPE (Potassium Glyme Poly Ethilene). I think it was used in some dechlorination process for PCBs. The point is that KGPE is something like this: KO-[-CH2-CH2-]n-CH2-CH2-O-K (I think this was what the molecule looked like) Being the sodium methoxide the catalyst in the traditional "Mike Pelly" recipe (though I«ve never liked the word catalyst here, «cause the methoxide DOES react with the oil), couldn«t it be possible that the "misterious catalyst" mentioned in this whole discussion on solid catalysts, is in fact something like KGPE, or maybe NaGPE? Someone mentioned it was a polymer. Plus, the chemical properties of sucha a polymer shouldn«t differ that much from traditional methoxide. Then again, I wouldn«t see why this KGME wouldn«t react and dissappear (thus, not being a catalyst at all)- Please let me know if this polymer stuff rings a bell somewhere. If so, I«ll do a bit more research on this KGPE stuff. Regards, Christian ----- Original Message ----- From: "Keith Addison" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Wednesday, January 09, 2002 1:48 AM Subject: Re: [biofuel] Solid catalyst, > The Fox-Ginosar process (INEEL) apparently uses a polymer. I posted > this to the list a long time ago, I don't know if anyone ever picked > it up: > > A message from Mike Pelly re solid phase catalysts: > > "I have been getting ready to pick up some of that type of catalysts > but have not till now. Not sure just what worked. I understand a > chemical that is called Dowex works too. (Also need to retrofit my > processor to make it happen.) > > "I'm writing to pass along to you an idea I have on using a solid > phase catalyst without going through the process of gluing it in > place. My plans are to contain it in a tube that has screens with > mesh finer than the catalyst at either end. The grease and alcohol is > pumped through this in-line (filter-type) device. In simplistic terms > it would be like placing the catalysts between two sink faucet > screens and plumbing it in-line on a reactor like the one Dale > Scroggins built. Also the part with unions at both ends, could be > easily removed for easy cleaning, back flushing and recharging of > catalyst." > > > David Reid posted this: > > Points to start and research: > (From the Woollatt book but remember published 1985). > > Bleaching and the treatment of Distillates with ion-exchange resins to > upgrade quality : > initial bleaching with 0.2-2.0% activated carbon > ion-exchange resins from Rohm and Haas instead of or after a.c. > [Macrorecticular resins (which have large discrete pores capable of removing > relatively large molecular mass compounds from the liquid) are normally best > for this duty which demands the removal of organic, rather than ionic, > impurities ]. Sound ideal in this instance to me. > eg: Amberlite 200 or 200C - strong cation resin . > Amberlite IRA-93 - weak base anion resin. > Amberlite IRA-900 - strong base anion resin > Deodorization, using heat and open steam, under vacuum, following treatment > often necessary. > > Production of refined grades of glycerine without distillation: > Ion exclusion: process developed by Dow Chemical Co and reviewed in paper by > D'Souza (1979) using a bed of granular resin such as Dowex WX8 allowed > partial purification which could then be completed by ion-exchange. > Ion-exchange process sounds okay but regeneration using hydrochloric or > sulphuric acids for the cation resins and caustic soda for the anion resin > dosnt sound really feasible or realistic for a small plant. Would also not > be economic I believe. > Lever Bros installed a plant in L.A. designed by Illinois Water Treatment Co > in 1951 but would seriously doubt this was still in operation. Dosnt sound > too promising. Distillation still seems to be the preferred method. > Reverse Osmosis also dosnt sound too promising although there could have > been developments in the last 15 years. > Refs: Sourirajan and Kimura (1967), review Sourirajan and Matsuura (1982). > > > This is also from Mike Pelly: > > >From: "Goltz, Bob (HR)" > >To: "'[EMAIL PROTECTED]'" > >Subject: Base catalyzed esterification > >Date: Thu, 4 Oct 2001 11:28:27 -0400 > > > >Mike Pelly...Thanks for your inquiry. Since you are running this reaction > >as base catalyzed, I think the product you need is DOWEX 1X2 in the OH form. > >This product comes in several particle sizes... 50-100, 100-200 and 200-400 > >mesh. I suggest you try the 50-100 mesh as it will give the lowest pressure > >drop and still offer short diffusional paths. The resin will catalyze this > >reaction as long as the resin is in the OH form. If the resin picks up > >chloride or other anions, it will sto working as a catalyst. To restore the > >DOWEX 1X2 capacity, it can be washed with NaOH as directed in the > >literature. > >More information on this product can be found on our web site at > >http://www.dow.com/liquidseps/pc/jump/nonwater/d_1x2.htm > > > >Small samples of the resin can be purchased from Supelco by calling Barb > >Vogler at 800-359-3041. They can also sell you a cartridge. You will need > >to dry the resin before you do your testing. These resins will release low > >levels of amine during drying that smells bad so be sure to use a vented > >oven. More information on drying resins can be found at > >http://www.dow.com/liquidseps/pc/special/catalys.htm > > > >http://www.dow.com/liquidseps/pc/pt/orgsolv.htm > > > > > >Good luck with your endeavors. > >H. Robert Goltz, Ph.D. > >Dow Liquid Separations > >Phone 989-636-2023 > >Fax 989-638-9944 > >Email [EMAIL PROTECTED] > > > >DOWEX* Resins Specialized Separations Home Page > >http://www.dow.com/liquidseps/pc/special/index.htm > > > Hope this helps. > > Best > > Keith Addison > Journey to Forever > Handmade Projects > Tokyo > http://journeytoforever.org/ > > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > 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/ > > ______________________________________________________________________________ mensaje enviado desde http://www.iespana.es emails (pop)-paginas web (espacio ilimitado)-agenda-favoritos (bookmarks)-foros -Chat ------------------------ Yahoo! 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