Author Topic: water aspirator  (Read 1122 times)

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think4yourself

  • Guest
water aspirator
« on: June 28, 2003, 01:55:00 PM »
Would a water aspirator suffice for a vacuum source when synthisyzing lsd? How many bars does an average aspirator pull and how many bars do I need?

hCiLdOdUeDn

  • Guest
If your asking a question on vacuum pressure...
« Reply #1 on: June 28, 2003, 05:20:00 PM »
If your asking a question on vacuum pressure like this, you obviously dont have the knowledge or skill to synthesize LSD.

Here helpful links on pressure:

http://www.repairfaq.org/sam/lasercva.htm



Handy dandy vacuum chart*:

           Inches of Hg         Torr or
      Rel to 1 atm   Absolute   mm of Hg   PSI      % Vacuum     Microns
    ----------------------------------------------------------------------
         0.0          29.92      760      14.696      0.0           -
         0.40         29.52      750      14.5        1.3           -
        10.24         19.68      500       9.7       34.0           -
        18.11         11.81      300       5.8       61.0           -
        25.98          3.94      100       1.93      87.0           -
        27.95          1.97       50       0.97      93.5           -
        28.92          1.00       25.4     0.4912    96.6           -
        29.52          0.40       10.0     0.193     98.7           -
        29.88          0.04        1.0     0.0193    99.9       1000.0
        29.916       3.94*10-3    10-1    1.93*10-3   99.99       100.0
        29.9196      3.94*10-4    10-2    1.93*10-4   99.999       10.0
        29.91996     3.94*10-5    10-3    1.93*10-5   99.9999       1.0
        29.919996    3.94*10-6    10-4    1.93*10-6   99.99999      0.1   
        29.9199996   3.94*10-7    10-5    1.93*10-7   99.999999     0.01


*=from source above.

wolfx

  • Guest
Maximum vacuum pressure
« Reply #2 on: June 28, 2003, 06:08:00 PM »
The aspirator maximum vacuum is equal to the partial water pressure of the water at the operating temperature. That means colder water gives you better vacuum. If you have a table of the partial pressure of the water at different temperatures, you will know the aspirator vacuum at different operating temperatures as well.

My aspirator is a NALGENE, small, works with low water flow, at 25 C you get aproximately 35 mm Hg vacuum. If you need this in other vacuum units, please use a WWW unit converter tool.

Test you aspirator with the water boiling point under the aspirator vacuum. Mine boils water at 31 C.

Most probably you will need to buy connectors or improvise something to connect your aspirator to the water source, a good setup is necessary to achieve good vacuum and to avoid spilling water. I don't know why but this is usually not included.

BTW, I am posting here some basic info on the aspirator so you can learn, but I doubt you can make LSD, the synthesis is very difficult, things are light sensitive, precursors are watched and difficult to obtain, etc.

think4yourself

  • Guest
Soooooo
« Reply #3 on: June 28, 2003, 10:55:00 PM »
So would a vacuum with 0.01 Torr (10 micronTorr) work?

wolfx

  • Guest
Yes
« Reply #4 on: June 28, 2003, 11:02:00 PM »
1 Torr = 1 mm Hg, so 10 u Torr = 10 um Hg

Yes, more than enough.

Look at

http://www.digitaldutch.com/unitconverter


gir1536

  • Guest
hmm....
« Reply #5 on: July 08, 2003, 09:39:00 PM »