By J Frederic Walker
The grooving significance of formaldehyde as a advertisement chemical, its many distinctive features, and its diverse purposes have created a distinct desire for a svstematk and significant account of formaldehvde chemistry. This Monograph is gifted within the wish of satisfying this desire. formerly no unmarried ebook facing this topic has been to be had within the English language.
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Additional resources for Formaldehyde
Int Ckm. Soc, 1,41 (1924), 7. Haggard, H. W„ /. hi E%u % 390 (1923). S. , S4,635 (1901). 9. , Trans, Fmky Soc, 27,37S-S4 (1931), 10. , 1939. 11. "International Critical Tables", Vol. 7, page 243, New York, McGraw-Hill Book Co. 12. , Ber,, 25, (3), 2435 (1893). 13. Kohlrausch, E. W. F. , Z. p ^ Clm,} 24B, 370 (1934). 14. Lacy, B. S. , E. )—Unpublished communication. 15. Newton, R. H. : and Dodge, B. , J. Am. Chem. Soc, 55,4747 (1937). 16. , Phys. > 46,117-21 (19341. 17. , and Ebers, E. , J. , 5, S22-7 (1037).
Calculated Heat Capacities (CP) for Formaldehyde Gas. 05 accurate up to temperatures of 400°C. Since errors : even in values calculated for zero pressure, may be in tenths rather than hundredths of a unit, it is obvious that we may ignore the effect of pressure, up to at least one atmosphere, and assume that (Cp)pBl == ( C p ) ^ 0 for temperatures of 100° to 400°C. 1 atm, we may assume that D (@P)P-4 — (@P)p*=p at all temperatures from 0 to 400 C. Heat of Formation and Free Energy of Monomeric Gaseous Formaldehyde.
3% CH 2 0 by weight Methanol content: Normally varies from 6,0 to 15 per cent by weight according to trade requirements. 5 ppm Aluminum: About 3 ppm Heavy metals: Trace Organic and inorganic impurities other than those listed above are substantially absent. However, solutions stored for prolonged periods may 39 FORMALDEHYDE 40 develop measurable amounts of methylal. P. requirement for acidity 25 is that 20 cc of solution shall not consume more than 1 oe of normal alkali. 8 to 4. Physical Properties Density and Refractivity.
Formaldehyde by J Frederic Walker