I would like to ask: what is the purity of phenol when it crystallizes at 40 degrees Celsius? ”
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I would like to ask: what is the purity of phenol when it crystallizes at 40 degrees Celsius? ”I hope those who are familiar with this can let me know, and also explain how the calculation is done. Thank you~ It would be great to have a fixed reference table~ Thanks~~
The freezing point of phenol is around 40.8 degrees, but the purity of phenol cannot be determined accurately based on its freezing point, as the theoretical formula for the depression of the freezing point is based on pure phenol mixed with another pure substance; the impurities present in impure phenol affect these theoretical calculations. It is recommended to use chromatography or other chemical methods to determine the purity of phenol.
Just an approximate purity level will do; it’s for reference only. Thank you~
If the thermometer correction is added, along with the correction for the exposed parts, it should be 97.98%
If you don’t have the exact figures, you can calculate it this way: multiply the crystallization point by 2.45 to get the percentage content. The accurate content is based on what I have at Heshi.
There are tables for the crystallization points and contents of phenol, tables for those of m-cresol, tables for the contents and boiling ranges of o-cresol, and also tables for the boiling ranges and contents of m-p-cresol.
Reply to 8# Zhongtai Lao Yang: Boss, you haven’t uploaded your table yet! !
Relationship between the crystallization point temperature and percentage content of m-cresol
Temperature (°C): 0.1, 0.2, 0.4, 0.6, 0.8
Remarks:
27: 34.8, 35, 35.1, 35.3, 35.4
28: 35.6, 35.8, 35.9, 36.1, 36.2
29: 36.4, 36.6, 37.7, 36.9, 37
30: 37.2, 37.4, 37.6, 37.7, 37.9
31: 38.1, 38.3, 38.5, 38.6, 38.8
32: 39, 39.2, 39.4, 39.5, 39.7
33: 39.9, 40.1, 40.3, 40.5, 40.7
34: 40.9, 41.1, 41.3, 41.5, 41.7
35: 41.9, 42.1, 42.3, 42.5, 42.7
36: 42.9, 43.1, 43.3, 43.6, 43.8
37: 44, 44.2, 44.4, 44.7, 44.9
38: 45.1, 45.3, 45.5, 45.8, 46
39: 46.2, 46.4, 46.7, 46.9, 47.2
40: 47.4, 47.7, 47.9, 48.2, 48.4
41: 48.7, 49, 49.3, 49.5, 49.8
42: 50.1, 50.4, 50.7, 51, 51.3
43: 51.6, 51.9, 52.2, 52.5, 52.8
44: 53.6, 53.4, 53.7, 54.1, 54.4
45: 54.7, 55, 55.4, 55.7, 561
46: 56.4, 56.7, 57.1, 57.4, 57.8
47: 58.1, 58.5, 58.8, 59.2, 59.8
48: 59.9, 60.3
Relationship between the crystallization point of phenol and its content
Temperature (°C): 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9
Remarks:
29: 71.05, 71.3, 71.54, 71.79, 72.03, 72.28, 72.52, 72.77, 73.01, 73.26
30: 73.5, 73.5, 73.99, 74.24, 74.48, 74.76, 74.79, 75.22, 75.46, 75.71
31: 75.95, 75.95, 76.44, 76.69, 76.93, 77.18, 77.42, 77.67, 77.91, 78.16
32: 78.4, 78.65, 78.89, 79.14, 79.38, 79.63, 79.87, 80.12, 80.36, 80.61
33: 80.85, 81.1, 81.34, 81.59, 81.38, 82.08, 82.32, 82.57, 82.81, 83.06
34: 83.3, 83.55, 83.79, 84.04, 84.28, 84.53, 84.77, 85.12, 85.26, 85.51
35: 85.75, 86, 86.24, 86.49, 86.73, 86.98, 87.22, 87.47, 87.71, 87.96
36: 88.2, 88.45, 88.7, 88.94, 89.19, 89.43, 89.68, 89.92, 90.17, 90.41
37: 90.66, 90.9, 91.15, 91.39, 91.64, 91.88, 92.13, 92.37, 92.62, 92.86
38: 93.11, 93.35, 93.6, 93.84, 94.09, 94.33, 94.58, 94.82, 95.07, 95.31
39: 95.55, 95.8, 96.04, 96.26, 96.53, 96.78, 97.02, 97.27, 97.51, 97.76
40: 98, 98.25, 98.5, 98.74, 98.99, 99.23, 99.48, 99.72, 99.97, 100.21
Temperature (°C): 0.1, 0.2, 0.4, 0.6, 0.8
Remarks:
27: 34.8, 35, 35.1, 35.3, 35.4
28: 35.6, 35.8, 35.9, 36.1, 36.2
29: 36.4, 36.6, 37.7, 36.9, 37
30: 37.2, 37.4, 37.6, 37.7, 37.9
31: 38.1, 38.3, 38.5, 38.6, 38.8
32: 39, 39.2, 39.4, 39.5, 39.7
33: 39.9, 40.1, 40.3, 40.5, 40.7
34: 40.9, 41.1, 41.3, 41.5, 41.7
35: 41.9, 42.1, 42.3, 42.5, 42.7
36: 42.9, 43.1, 43.3, 43.6, 43.8
37: 44, 44.2, 44.4, 44.7, 44.9
38: 45.1, 45.3, 45.5, 45.8, 46
39: 46.2, 46.4, 46.7, 46.9, 47.2
40: 47.4, 47.7, 47.9, 48.2, 48.4
41: 48.7, 49, 49.3, 49.5, 49.8
42: 50.1, 50.4, 50.7, 51, 51.3
43: 51.6, 51.9, 52.2, 52.5, 52.8
44: 53.6, 53.4, 53.7, 54.1, 54.4
45: 54.7, 55, 55.4, 55.7, 561
46: 56.4, 56.7, 57.1, 57.4, 57.8
47: 58.1, 58.5, 58.8, 59.2, 59.8
48: 59.9, 60.3
Relationship between the crystallization point of phenol and its content
Temperature (°C): 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9
Remarks:
29: 71.05, 71.3, 71.54, 71.79, 72.03, 72.28, 72.52, 72.77, 73.01, 73.26
30: 73.5, 73.5, 73.99, 74.24, 74.48, 74.76, 74.79, 75.22, 75.46, 75.71
31: 75.95, 75.95, 76.44, 76.69, 76.93, 77.18, 77.42, 77.67, 77.91, 78.16
32: 78.4, 78.65, 78.89, 79.14, 79.38, 79.63, 79.87, 80.12, 80.36, 80.61
33: 80.85, 81.1, 81.34, 81.59, 81.38, 82.08, 82.32, 82.57, 82.81, 83.06
34: 83.3, 83.55, 83.79, 84.04, 84.28, 84.53, 84.77, 85.12, 85.26, 85.51
35: 85.75, 86, 86.24, 86.49, 86.73, 86.98, 87.22, 87.47, 87.71, 87.96
36: 88.2, 88.45, 88.7, 88.94, 89.19, 89.43, 89.68, 89.92, 90.17, 90.41
37: 90.66, 90.9, 91.15, 91.39, 91.64, 91.88, 92.13, 92.37, 92.62, 92.86
38: 93.11, 93.35, 93.6, 93.84, 94.09, 94.33, 94.58, 94.82, 95.07, 95.31
39: 95.55, 95.8, 96.04, 96.26, 96.53, 96.78, 97.02, 97.27, 97.51, 97.76
40: 98, 98.25, 98.5, 98.74, 98.99, 99.23, 99.48, 99.72, 99.97, 100.21