sorry, i mustve not been watching wat i was typing, i meant calcium carbonate

 

Simple mistake

 

 

 

 

ya, ancient methods never work. I didnt know potassium carboante could decompose to calcium oxide. ill have to try it

ya, ancient methods never work.

 

you have GO TO BE kidding right!?

If you tack on 'to produce large quantities', then yes, the statement is correct.

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ya' date=' ancient methods never work. I didnt know potassium carboante could decompose to calcium oxide. ill have to try it[/quote']

 

u kidding me! U did it again

Maybe he was trying to quote it...

 

~Scott

if u get the potassium hydrogen carbonate, if u heat it to mauch wont you just decompose it back into KOH. How would u make sure not to release the co2 and only the hydrogen?

ya, i screwed up on my quoting.

it decomposes at 100c to the carbonate, to go beyond this you`de need alot of heat! it`s unlikely you`ll manage to get that high in a kitchen oven

I thought he'd use a stove? Anyway... Ive read before that it decomposes at 100C to CO2 and KOH are you sure it decomposes to the carbonate at 100C

 

~Scott

i wouldnt use a kitchen stve, ive got MAPP gas burners in my lab

How hot to those burners get my stove can easily melt zinc (420C) and ive melted a small amount of aluminium (660) before (It mostly oxidises before it melts). Im not sure it would be worth upgrading to a stronger burner because dont realy need anything to get that hot...but if their not tooo expensive, could it hurt?

 

~Scott

I thought he'd use a stove? Anyway... Ive read before that it decomposes at 100C to CO2 and KOH are you sure it decomposes to the carbonate at 100C

 

~Scott

 

it should behave in the same way that sodium bicarbonate does, in fact one of the problem inherant with KOH is that left in the open, it`ll readily absorb CO2 from the atmosphere and react.

Just making sure Looks like you can't believe everything you read

 

~Scott

no problem

 

this isn`t a great link, but see the bit in the Green: http://216.239.59.104/search?q=cache:WEVgAlfKCaQJ:www.armandproducts.com/pdfs/PotBiVs6.PDF+%22potassium+carbonate%22+bicarbonate+decomposition&hl=en

 

and here: http://tesscorpeng.tessenderlogroup.com/popup.asp?doctype=Product&id=020160117

benson, i can braze with my MAPP gas burner. I have a homemade bunsen burner that can operate on mapp, or propane, it hooks into my blowtorch regulater. Real simple and it works.

benson, i can braze with my MAPP gas burner. I have a homemade bunsen burner that can operate on mapp, or propane, it hooks into my blowtorch regulater. Real simple and it works.

 

wise minds think alike it would seem, your setup is identical to mine

Wow thats hot Whats the damage on a burner like the one youve got?

 

~Scott

free, it`s all homemade from scrap bits of junk I seem to collect everywhere I go

I knew i should have taken metalwork instead of woodwork

 

~Scott