PHOSGENE IS VERY TOXIC (TEN TIMES AS TOXIC AS CHLORINE GAS)
This one is then ten times less toxic and gives you two valuable products:
1) PCl3 + Cl2 -> PCl5
2) PCl5 + SO2 -> POCl3 + SOCl2
Warning this is DANGEROUS
Subject: Re: How concentrate 30 % H2O2 to 90 % H2O2
From: nreitzel@lonestar.jpl.utsa.edu (Norman L. Reitzel )
Date: Feb 29 1996
Newsgroups: sci.chem
In article <31330953.0@news-feed.tfi.be> P. COCKS <> writes:
>Is it possible with a litle chem lab to concentrate
>H2O2?
>What are the dangers of 90 % H2O2 ?
>Can it explode spontanously ?
You can concentrate 30% H2O2 to 90% by drying it in a dessicator over concentrated sulfuric acid. Use a 4:1 ratio of acid to peroxide.
The 90% peroxide is -quite- explosive unless it is -absolutely- pure.
Worse, it sets things on fire on contact. If you plan on doing this thing, go to a Library first, and read the article on hydrogen peroxide in _Preperative Inorganic Chemistry_.
I'll make that patent clickable
Patent GB538028 (http://l2.espacenet.com/dips/viewer?PN=GB538028&CY=gb&LG=en&DB=EPD)
Those who give up essential liberties for temporary safety deserve neither liberty nor safety
Post 180231 (https://www.thevespiary.org/talk/index.php?topic=7629.msg18023100#msg18023100)
(FloridaAlchemist: "Thionyl Chloride Prep", Chemistry Discourse)