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I am looking for the Antoine parameters for Biphenyl or Diphenyl. I know the pressure at the bottoms of the distillation column and need to find the temperature there. The mixture in the bottoms is primarily 33% Toluene and 66% BiPhenyl/Diphenyl. Surprisingly, I wasn't able to find in the Perry's Handbook or in any of the texts I have. I wonder if the Antoine parameters exists for Biphenyl. If anyone knows where to find them or what they are (and the units) please post that info.
Thanks!
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Antoine Parameter For Biphenyl
Started by Guest_Guest_Jack_*_*, Dec 04 2005 02:06 PM
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mbeychok
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Posted 04 December 2005 - 04:50 PM
Jack:
It took about 3 minutes of searching for the key words "biphenyl" and "vapor pressure" using Google to find these two vapor pressure calculators, both of which included Biphenyl (C12H10):
Click here ==> www.s-ohe.com/Biphenyl_cal.html published by Shuzo Ohe
Click here ==> www.higgins.ucdavis.edu/webMathematica/MSP/Examples/VaporPressures published by Brian Higgins of the University of California at Davis
Since I don't trust online calculators to be correct, I checked the above two against each other at 3 different temperatures and they gave virtually the same answers. Then I looked up the boiling point of Biphenyl at 1 atmosphere (in the CRC Handbook of Chemistry and Physics) which was 255.9 °C. Ohe's calculator gave the vapor pressure at 255.9 °C as being 1.015 atmosphere, and Higgins' calculator also gave the vapor pressure as 1.015 atmosphere. So I concluded that the two calculators were trustworthy.
Higgins' calculator not only gives you the vapor pressure for a specified temperature, it also gives you the Antoine coefficients that it used and in the units that you specify.
I really don't understand why you didn't use Google yourself.
It took about 3 minutes of searching for the key words "biphenyl" and "vapor pressure" using Google to find these two vapor pressure calculators, both of which included Biphenyl (C12H10):
Click here ==> www.s-ohe.com/Biphenyl_cal.html published by Shuzo Ohe
Click here ==> www.higgins.ucdavis.edu/webMathematica/MSP/Examples/VaporPressures published by Brian Higgins of the University of California at Davis
Since I don't trust online calculators to be correct, I checked the above two against each other at 3 different temperatures and they gave virtually the same answers. Then I looked up the boiling point of Biphenyl at 1 atmosphere (in the CRC Handbook of Chemistry and Physics) which was 255.9 °C. Ohe's calculator gave the vapor pressure at 255.9 °C as being 1.015 atmosphere, and Higgins' calculator also gave the vapor pressure as 1.015 atmosphere. So I concluded that the two calculators were trustworthy.
Higgins' calculator not only gives you the vapor pressure for a specified temperature, it also gives you the Antoine coefficients that it used and in the units that you specify.
I really don't understand why you didn't use Google yourself.
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