Abdalrahman
Harmless
Posts: 4
Registered: 8-12-2018
Member Is Offline
|
|
I want prepair tri chlorosilane from silcon and hydrochloric acid In lab
I will make reaction at high tempreture as possible ,then
use distillation to get tri chlorosilane ,but dont sure if this will works
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
No.
|
|
|
walruslover69
Hazard to Others
Posts: 216
Registered: 21-12-2017
Member Is Offline
Mood: No Mood
|
|
The reaction works, How the hell are you expecting to pull it off?
|
|
|
DoctorOfPhilosophy
Hazard to Others
Posts: 130
Registered: 12-6-2012
Location: Ontario, Canada
Member Is Offline
Mood: enthralled
|
|
Hey guys, let's be nice to the new members. Abdalrahman, in the future, please refer to our excellent resource for inorganic chemistry: https://library.sciencemadness.org/library/books/brauer_ocr.... The key point here is the HCl has to be dry, since water would destroy your end
product.
I quote from it, for your reference. Trichlorosilane is nasty stuff so please be careful, unless you want to end up like these people: http://english.hani.co.kr/arti/english_edition/e_national/85...
| Quote: |
Several methods are available for the preparation of the three chlorosilanes. In order to obtain SiHCl3 as the principal product, the best way is to
react Si with HCl in the presence of copper.
Si + 3 HC1 = SiHCl 3 + H2
A porcelain boat is filled with finely powdered silicon, which has been purified by boiling with hydrochloric acid and dilute hydrofluoric acid. About
10% CuCl2 is mixed in with the silicon. The boat is placed in a Pyrex glass tube fitted with an adapter and a condenser, as described in the
preparation of SiCl4. In this case, however, the end of the condenser should extend into the middle of the distilling flask. The apparatus is first
carefully heated. Hydrogen chloride gas is produced from NaCl and H2SO4, without addition of hydrochloric acid, since it must be absolutely dry. The
furnace around the tube which contains the boat is heated to 300°C and a slow stream of HC1 is introduced. The receiver is cooled with acetone-Dry
Ice mixture. Finally, the crude product is distilled directly from the receiver. The first fraction is HC1. The SiHCl3 comes over at 36.5°C. With a
careful fractionation of the forerun, SiH3 Cl s may also be recovered. The yield of SiHCl3 is about 50%.
|
|
|
|
j_sum1
Administrator
Posts: 6218
Registered: 4-10-2014
Location: Unmoved
Member Is Offline
Mood: Organised
|
|
Wow! That is a lot easier than I would have guessed. I am not going anywhere near that though. I am guessing it is really nasty stuff.
|
|
|
clearly_not_atara
International Hazard
Posts: 2692
Registered: 3-11-2013
Member Is Offline
Mood: Big
|
|
It should be noted that HSiCl3 is produced at 300 C and its autoignition temperature is 185 C. Therefore, the reaction apparatus must be purged of
oxygen and rigorously sealed in order to prevent fires.
[Edited on 04-20-1969 by clearly_not_atara]
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
It forms SiO2 on wet surfaces while releasing HCl gas, so it is very nasty stuff to the body as the body has allot of moist surfaces.
It can all so be made by reacting Si in flowing Cl gas under heat
https://www.youtube.com/watch?v=wU77anzCzxg
[Edited on 11-12-2018 by XeonTheMGPony]
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
