I don«t know if I understand your question, but I«ll give it a go. HCl may be prepared by direct combination of the elements that form it: H2 + X2 --> 2HX -where X is generic for F, Cl, Br, I (Fluorine, Chlorine, Bromine, Iodine)-
The reaction with F2 to produce HF is explosive and very dangerous. The reaction with Cl2 does not occur completely in darkness, but performs quickly in a chain photochemical reaction under light. The luminous energy is absorbed by the Cl2 molecules which decompose into chlorine radicals (very reactive atoms with un-paired electrons). These attack the H2 molecules and produce HCl molecules, leaving hydrogen atoms (also radicals) . The hydrogen radicals also attack Cl2 molecules to form HCl molecules and chlorine radicals, and so on and so forth. HCl is a colourless gas, melting point: -114.8 ¡C, Boiling point -84.9 ¡C A SAFER way of preparing HCl is by the reaction of a metallic chlorine compound, as NaCl (ordinary table salt) with a non volatile acid (concentrated H2SO4 or H3PO4) The formed HCl then bubbles out of the resulting solution. NaCl (s) + H2SO4 (aq) --> NaHSO4 (s) + HCl (g) Other reactions, like hydrolysis, that produce HCl: BCl3 + 3H2O --> H3BO3 + 3HCl SiCl4 + 2H2O --> SiO2 + 4HCl CONCLUSION: So, for small scale production, the best option would be NaCl and sulphuric acid. How to get sulphuric acid?... well, I do it by making electrolysis out of a copper sulphate solution (this is a widely available salt). I built my own electrolysis tub with a couple of the carbon rods inside ordinary 1.5 volt batteries (AA). The drawback of all this is that HCl is a GAS, so if you want HCl solution, you«d have to bubble the gas through distilled water, and for wat«s worth it, you«d be far better off buying ordinary MURIATIC acid (31% HCl in water). ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Monday, December 31, 2001 7:23 PM Subject: [biofuel] HCL > Can HCL be fomulated on a small scale? > > > 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! Groups Sponsor ---------------------~--> Tiny Wireless Camera under $80! Order Now! FREE VCR Commander! Click Here - Only 1 Day Left! http://us.click.yahoo.com/WoOlbB/7.PDAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> 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/
