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Hydrofluoric acid
For god´s sake!!!

Is it REALLY necessary to experiment with HF??
HF is really one of the nastie ...
20-10-2002 at 10:42
by: Hoffmann-LaRoche
Phorone
http://www.sciencemadness.org/talk/viewthread.php?tid=179&page=3
20-10-2002 at 03:46
by: Hoffmann-LaRoche
Phorone
.....and it is also soluble in diethyl ether(Et2O), if that is of interest too....

HLR
19-10-2002 at 10:31
by: Hoffmann-LaRoche
Phorone
exactly my thought too....but i dont know which hydrate of H2SO4 to use would be best, cause concent ...
16-10-2002 at 16:39
by: Hoffmann-LaRoche
E&W Forum stagnating?
i experienced the same, as i am not a member of E&W too.
I have my own theory about this....i remem ...
15-10-2002 at 17:10
by: Hoffmann-LaRoche
forum threat?
frightening......i cant speak finnish, but he started a topic about DPPP and inserted a part of blas ...
15-10-2002 at 15:45
by: Hoffmann-LaRoche
Diphoronepentaperoxide (DPPP)
please ignore the part of isolating pentachlorphorone before the peroxidation step, i think this is ...
14-10-2002 at 16:28
by: Hoffmann-LaRoche
breakthrough in sight?
I want to give an impuls for pushing our research:

We have the patent, which is vague for many pa ...
14-10-2002 at 16:22
by: Hoffmann-LaRoche
Hydration of H2SO4
Can anyone tell me how strong the different steps of hydration of sulfuric acid are?
H2SO4 forms hy ...
13-10-2002 at 04:37
by: Hoffmann-LaRoche
Preparation of elemental phosphorus
polverone

Did u already think of using a mix of phosphates?

You could make a mix with another ...
12-10-2002 at 15:52
by: Hoffmann-LaRoche
98,7% HNO3 without vacuum distillation
no. just O3....and the yield of these apparatus is usually low...but i wonder why in your process fo ...
4-10-2002 at 04:11
by: Hoffmann-LaRoche
98,7% HNO3 without vacuum distillation
The tetrachlormethane method is obsolete...tetra is too hard to get and its density is not really mu ...
4-10-2002 at 02:03
by: Hoffmann-LaRoche
other extraction methods
Here are 2 new proposals for "extracting" the nitric acid out of the CaSO4-"slug" followed by freezi ...
3-10-2002 at 14:43
by: Hoffmann-LaRoche
Measuremt of density without pyknometer
The most simple method of measuring the crystal density of a water-insoluble substance is to prepare ...
3-10-2002 at 14:08
by: Hoffmann-LaRoche
Seperating AP from DPPP
I remind it being mentioned that phorone dissolves in alcohol; to me it´s very likely that DPPP als ...
3-10-2002 at 13:53
by: Hoffmann-LaRoche
98,7% HNO3 without vacuum distillation
Interesting what you said about that N2O5-process.....only problem is you´ll need an ozonizator whi ...
3-10-2002 at 08:55
by: Hoffmann-LaRoche
Acetic anhydride preparation
Maybe you didnt have a good procedure?-I will look up one.....

NaClO3 is cheap.
So:

1)4NaClO3 ...
23-9-2002 at 11:52
by: Hoffmann-LaRoche
japanese patent
This is a japanese patent, found by rc from the E&W-forum:

PURPOSE:To obtain phorone in high yiel ...
23-9-2002 at 10:47
by: Hoffmann-LaRoche
Acetic anhydride preparation
Anodic oxidation of MgCl2 at low current density.
Then carefully heating the resulting
Mg(ClO4)2* ...
23-9-2002 at 10:07
by: Hoffmann-LaRoche
DPPP research.....another attempt
Finally, i had some time for experiments.....

1) tried making phorone:

A)50mL of 30% HCl + 50m ...
23-9-2002 at 09:30
by: Hoffmann-LaRoche
Diphoronepentaperoxide (DPPP)
??
ERROR
The post you selected no longer exists. It may have been recently deleted.

Please hit ...
19-9-2002 at 03:20
by: Hoffmann-LaRoche
Diphoronepentaperoxide (DPPP)
äh.....sorry for the messy equation.....ya know what i mean
17-9-2002 at 10:16
by: Hoffmann-LaRoche
Diphoronepentaperoxide (DPPP)
That´s interesting...this would complicate the process a bit....but no problem so far!
I´ll try t ...
17-9-2002 at 10:11
by: Hoffmann-LaRoche
Diphoronepentaperoxide (DPPP)
Summary of differences to AP:

1)Phorone-intermediate is yellow and water insoluble, soluble in Et ...
17-9-2002 at 05:48
by: Hoffmann-LaRoche
Diphoronepentaperoxide (DPPP)
Doesnt anyone have access to beilstein?
- There HAS to be a procedure for it.
Philou, our hero.... ...
17-9-2002 at 02:24
by: Hoffmann-LaRoche
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