SWIM is trying the same procedure (1,4 or BDO -> GBL), and is finding MANY conflicting sources of information. Many supplier type sources list that the
CAS#12018-10-9
Cr2Cu2O5
2CuO.Cr2O3
F.W. 311.07
EINECS 234-634-6
TSCA
is the correct item, but then in a post by placebo, it was stated that
2.The correct catalyst to be used is Copper Chromite (Synonym: Lazier catalyst, can also be Barium promoted etc), CAS 12018-10-9, Consists of 62-64% Cr2CuO4, 22-24% CuO, can also contain 6%BaO, 0-4% Graphite, 1% CrO3, 1% Cr2O3. There are many variations. Preparation of this catalyst is on the Rhodium's site.
SWIM's question is three-fold:
1) Are these two compounds (Cr2Cu2O5 and 62-64% Cr2CuO4, 22-24% CuO, with 6%BaO, 0-4% Graphite, 1% CrO3, 1% Cr2O3) the same?
2) SWIM currently tried with CAS# 11104-65-7, [CrCuO3] and is not getting the desired results. Does anyone have any helpful info on this? SWIM is refluxing at 200c for approx 120-180 min., then performing a pressure distillation WITHOUT additional heating. Although there have been a few ways to do this that have been posted, SWIM thinks the preparation withOUT NaOH will produce the greatest yield.
3) With ANY of these catalysts, is ACTIVATION needed? If so, are there any catalysts out there that react with 1,4 without an "activation" process?
Someone PLEASE help!