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Author: Subject: The Short Questions Thread (4)
solo
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[*] posted on 9-12-2022 at 19:01


....original post was deleted

[Edited on 10-12-2022 by solo]




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[*] posted on 9-12-2022 at 20:32


Please comment on... MDP2P

By all means discuss the chemistry. But don't let it turn into something that will spoonfeed a procedure to some kewl whose only interest is class A drugs.
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B(a)P
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[*] posted on 15-12-2022 at 02:36


I have a procedure that calls for drying bromonitromethane dissolved in dichloromethane over sodium sulfate prior to evaporating the dichloromethane. Can I substitute the sodium sulfate for calcium chloride? Obviously sodium sulfate is easily obtained, I just don't have any on hand right now and am eager to get started.
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solo
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[*] posted on 24-1-2023 at 11:17


........not having any resuts looking for CuNiAlx catalysst, would like some help on its preparation or who sell it....solo



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Dr.Bob
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[*] posted on 24-1-2023 at 16:47


Quote: Originally posted by B(a)P  
I have a procedure that calls for drying bromonitromethane dissolved in dichloromethane over sodium sulfate prior to evaporating the dichloromethane. Can I substitute the sodium sulfate for calcium chloride? Obviously sodium sulfate is easily obtained, I just don't have any on hand right now and am eager to get started.


Don't see any reason CaCl2 would not work well, it is not basic or reactive with that, as best as I can see. DCM should be fine as well. Good luck.
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[*] posted on 31-1-2023 at 11:34



What is in Bakers No. 3 flux for soft soldering.
There is zinc chloride, anything else? and how much?

Cheers.
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[*] posted on 31-1-2023 at 11:53


Quote: Originally posted by yobbo II  

What is in Bakers No. 3 flux for soft soldering.
There is zinc chloride, anything else? and how much?

Cheers.


Ammonium chloride

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yobbo II
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[*] posted on 2-2-2023 at 08:28



Thanks B(a)P,

Before I read the post I decided to make some myself. (Did not know it contained Ammonium Chloride).
Added some Zinc Chloride to water and a sup of HCl acid. The stuff works great. Far better than the paste type flux.
The paste type is probably far less corrosive etc, for electrics, but I am doing big rough stuff.

Cheers,
Yob
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solo
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[*] posted on 3-2-2023 at 06:04


Quote: Originally posted by solo  
........not having any resuts looking for CuNiAlx catalysst, would like some help on its preparation or who sell it....solo


...found the information....

Catalyst preparation.
CuNiAlOx was prepared by the coprecipi-tation method. 1.44 g (5.96 mmol) of Cu(NO 3 ) 2·3H 2 O, 3.48 g (11.97
mol) of Ni(NO 3 )2·6H 2 O, and 6 g (15.99 mmol) of Al(NO 3 ) 3·9H2 Owere added into 150 mL of deionized water at 80 °C in a 250 mL flask,and under vigorous stirring, 60 mL of Na2 CO3 solution (1.415 mol)was added dropwise into the solution. The mixture was mechanically stirred for 5 h and then cooled to room temperature and filtrated.

Following, the filtrate was washed with deionized water to neutral,
dried at 100 °C for 5 h, calcined at 400 °C for 4 h, and then reducedunder hydrogen flow at 450 °C for 2 h. Finally, the obtained catalystwas denoted as CuNiAlOx. The catalysts denoted as CuAlOx, NiAlOx,and CuNiOx were prepared with the same procedure

......Sustainable Catalytic Amination of Diols: From Cycloamination to
Monoamination --Yajuan Wu




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