[Crystal]

I really can not think of any reasons for changes in extracting iodine over many years. cud u help me plz?
thanx

[Donaldson Tan]

what are the changes that have taken place all this years? What are the reasons behind these changes? Is there common ground among the various reasons?

[Crystal]

sorry, i did'nt really expalin what i was talking about! But its ok now, i have found the answer.


What methods are used to extract chlorine? i've looked everywhere 4 a method, cud u plz help me?!
thanx

[Mitch]

click search on the top of the forum. It has been discussed before.

[Pez131]

hi crystal. i too need help in reasons for changes in extraction in iodine over 19th n 20th centuries. plz let me no as soon as u find the answer.

thnx

[Donaldson Tan]

i believe the driving force for change over many industrial processes has been:
1. availability of raw materials
2. economics (lower operational cost, cheaper equipment & raw material)
2. safety (less hazardous process, safer operating conditions)
3. environmental concern (no toxic byproduct, or reduced toxic discharge)
4. technology (faster process, use cheaper catalyst)