Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-27T09:57:08.037Z Has data issue: false hasContentIssue false
  • English
  • Français

Steam distillation of taints from cream: IV. Vapour/liquid equilibrium relationships for mesityl oxide and some α-diketones as possible reference substances

Published online by Cambridge University Press:  01 June 2009

F. H. McDowall
F. H. McDowall
Affiliation:
The Dairy Research Institute (N.Z.), Palmerston North, New Zealand
Get access Rights & Permissions [Opens in a new window]

Extract

1. Measurements, by means of a continuous vaporization equilibrium still, of vapour/liquid equilibrium relationships in the steam distillation of dilute aqueous solutions showed that for mesityl oxide the relationship was linear, equilibrium coefficient (CV/CL)= 74.

2. For acetylpropionyl it was linear over the concentration range l–10 p.p.m. in the liquid, CV/CL=51, and above a concentration of 20 p.p.m. it was again approximately linear. At 20 and 50 p.p.m. in the liquid the values found for CV/CL were 34 and 21·5 respectively.

3. For acetyl-iso-butyryl it was not linear even at very low concentrations, of the order of 1–3 p.p.m. in the liquid, but there was an approach to linearity at concentrations 0–1 p.p.m., CV/CL=240. At concentrations above 1 p.p.m. in the liquid there was a steady fall in the value for the equilibrium coefficient.

4. For acetylvaleryl it was curvilinear even over the concentration range 0·1–4·0 p.p.m. in the liquid. At 0·5–1·0 p.p.m. in the liquid the equilibrium coefficient was of the order of 240. Above a concentration of 4 p.p.m. in the liquid the relationship was linear.

5. For acetylcaproyl it was approximately linear only over the concentration 0·1–0·4 p.p.m. in the liquid, CV/CL=180. At 4 and 8 p.p.m. in the liquid the coefficients were 90 and 70 respectively.

6. For acetylbenzoyl it was curvilinear at low concentrations, i.e. 0·1–0·5 p.p.m. in the liquid, CV/CL=30 decreasing to 16. Above this concentration there was a gradual fall in the equilibrium coefficient to 11·5 at 70 p.p.m. in the liquid.

7. Of the substances investigated only diacetyl and acetylpropionyl and, within limits, acetylbenzoyl were considered to be of suitable properties for use as reference substances in detailed investigations on cream deodorization equipment.

Type
Original Articles
Information
Journal of Dairy Research , Volume 26 , Issue 1 , February 1959 , pp. 24 - 32
Copyright
Copyright © Proprietors of Journal of Dairy Research 1959

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1)McDowall, F. H. (1953). Proc. 13th Int. Dairy Congr. 3, 781.Google Scholar
(2)McDowall, F. H. (1955). J. Dairy Res. 22, 311.CrossRefGoogle Scholar
(3)McDowall, F. H. (1956). J. Dairy Res. 23, 48.CrossRefGoogle Scholar
(4)McDowall, F. H. (1957). J. Dairy Res. 24, 184.CrossRefGoogle Scholar
(5)Scott, J. K. (1956). J. Dairy Res. 23, 30.CrossRefGoogle Scholar
(6)Scott, J. K. (1956). J. Dairy Res. 23, 363.CrossRefGoogle Scholar
(7)Pien, J., Baisse, J. & Martin, H. (1937). Lait, 17, 673.CrossRefGoogle Scholar
(8)Cox, G. A. & Wiley, W. J. (1939). J. Coun. Sci. Industr. Res. Aust. 12, 227.Google Scholar
(9)McDowall, F. H. (1955). N.Z. J. Sci. Tech. 37B, 1Google Scholar
(10)McDowall, F. H. (1956). Proc. 14th Int. Dairy Congr. 2, 257.Google Scholar
(11)Holman, R. T., Lundberg, W. O. & Burr, G. O. (1945). J. Amer. Chem. Soc. 67, 1386.CrossRefGoogle Scholar
(12)Fuge, E. T. J., Bowden, S. T. & Jones, W. J. (1952). J. Phys. Chem. 56, 1013.CrossRefGoogle Scholar
(13)Heilbron, I. M. (1934). Dictionary of Organic Compounds, pp. 14–18. London: Eyre and Spottiswoode.Google Scholar
(14)Schwarzenbach, G. & Wittwer, C. (1947). Helv. Chim. Acta, 30, 669.CrossRefGoogle Scholar
(15)Gero, A. (1954). J. Org. Chem. 19, 1962.Google Scholar