furfuraldehyde

The neutral or very faintly alkaline solution was then distilled almost to dryness, when practically the whole of the furfuraldehyde comes over.

Scientific American Supplement, No. 821, September 26, 1891 Various

After this period of time, further treating did not increase the amount of furfuraldehyde produced.

Scientific American Supplement, No. 821, September 26, 1891 Various

The latter also, when distilled with hydrochloric acid, yields a larger proportion of furfuraldehyde than is obtained from nitrocellulose and nitrohydrocellulose.

Researches on Cellulose 1895-1900 C. F. Cross

The tint obtained with the standard was then compared with that yielded by the gum distillate from which the respective ratios of furfuraldehyde are obtained.

Scientific American Supplement, No. 821, September 26, 1891 Various

The yield of furfuraldehyde by the breaking down of arabin and metarabin was thought possibly to be of some value in differentiating the natural gums from one another, but we have not succeeded in obtaining results of much value.

Scientific American Supplement, No. 821, September 26, 1891 Various

The percentage yields of furfuraldehyde obtained from these fractions were as follows: A, insoluble, 0.86; precipitated, 4.35; dissolved, 1.10.

Researches on Cellulose 1895-1900 C. F. Cross

From these and some other substances, the following percentage yields of furfuraldehyde were obtained: Hydrocellulose, 0.854; oxycellulose, 2.113; reduced cellulose,

Researches on Cellulose 1895-1900 C. F. Cross

It appears, from the foregoing results, that the cellulose molecule, after oxidation, is easily decomposed by potash, the insoluble and larger portion having all the characters of the original cellulose, whilst the soluble portion is of an aldehydic nature, and contains a substance, precipitable by acids, which yields a relatively large amount of furfuraldehyde.

Researches on Cellulose 1895-1900 C. F. Cross

The yields of furfuraldehyde would appear to have no definite relation to the other chemical data about a gum, such as the potash and baryta absorptions or the sugar produced on inversion.

Scientific American Supplement, No. 821, September 26, 1891 Various

Although furfuraldehyde is the natural decomposition product of pentosans, furfuryl alcohol is the main furane body of coffee aroma.

All About Coffee 1909