6 replies to this topic

[Dan]

If i wanted to convert 5 grams of pvc [C2H3Cl] to grams of parlon (C4H6Cl2), could i calculate the moles of pvc and the moles of parlon and then since there is 1 Cl in pvc vs. 2Cl in parlon, take the amoun of pvc in moles and multiply it by 1/2 to get how many moles of parlon i need. and then convert that into grams? would this be correct or did i miss something?
thx
Dan

[adamw]

Well, correct me if I am wrong, but PVC can have different levels of chlorine, so substitiuting PVC powder for Parlon / Saran etc cannot always be done that way. You should substitute according to Cl content - most powders will state - ie 50%, 70% etc. Parlon is 68% Cl - so if you want to do a like-for like conversion find a 68% PVC powder or use 68% as your 'base amount' and work around it with higher / lower Cl content powders.

[Dan]

cool thx adamw, thats a lot less complicated.

[NorCalPyro]

Maybe I'm a bit dense (OK paranoid ) but I want to make sure that I understand the details of substituting Parlon for PVC. I am wanting to order only one chlorine doner if possible to reduce costs. Since Parlon is a 68% donor compared to PVC as a 57% donor I would use a ratio of 57/68 Parlon as the substitute for PVC. Is this correct?

I saw one post that indicated increasing the % of fuel (red gum) to compensate for the lower % of fuel provided by using a smaller amount of Parlon compared to PVC.

As an example if the formula calls for 10 parts of PVC I would use (57/68)x10 = 8.4 parts Parlon. I would then increase the fuel (i.e. red gum) by 1.6 parts to make up for the missing fuel from the PVC. Is this correct?

Any other considerations to take into account in substituting chlorine donors?

Thanks for the help

[Mumbles]

That is indeed how I would go about it. Normally I'm not that careful, and will just replace 1:1 and then make adjustments from there. I often use charcoal to make up for fuel deficiencies, but red gum works too. Increased fuel in a comp can be compensated by raising the oxidiser amount.

[NorCalPyro]

Thanks for the reply Mumbles.

[MDH]

Parlon is known to slow down burn rate. Saran burns quite freely.

-MDH