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All 2 posts Subject: polyphosphoric acid refs? Please login to post Down

FriendlyFinger
(Hive Bee)
04-29-04 06:19
No 503688
polyphosphoric acid refs?

Hi there,
I know there's lot here about making polyphophoric acid so I will wait till TFSE is back, but in the mean time is anyone aware of references about the dehydration/vacuum method?

Thanks,
FF

Be joyful, though you've concided the facts!

Nicodem
(Hive Bee)
04-29-04 08:43
No 503710
User Picture The preparation of polyphosphoric acid by...

The preparation of polyphosphoric acid by heating phosphoric acid under vacuum is described in Organikum in the reagents section. A rough translation:

"The water from the 85% H3PO4 is distilled out under the vacuum of a vater jet pump and the rest is heated for 6 hours at 150°C in the same vacuum. The remaining phosphoric acid crystalises out."

“The real drug-problem is that we need more and better drugs.” – J. Ott

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	All 2 posts		Subject: polyphosphoric acid refs?		Please login to post		Down


		FriendlyFinger (Hive Bee) 04-29-04 06:19 No 503688				polyphosphoric acid refs?
						Hi there, I know there's lot here about making polyphophoric acid so I will wait till TFSE is back, but in the mean time is anyone aware of references about the dehydration/vacuum method? Thanks, FF Be joyful, though you've concided the facts!



		Nicodem (Hive Bee) 04-29-04 08:43 No 503710				The preparation of polyphosphoric acid by...
						The preparation of polyphosphoric acid by heating phosphoric acid under vacuum is described in Organikum in the reagents section. A rough translation: "The water from the 85% H3PO4 is distilled out under the vacuum of a vater jet pump and the rest is heated for 6 hours at 150°C in the same vacuum. The remaining phosphoric acid crystalises out." “The real drug-problem is that we need more and better drugs.” – J. Ott

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