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The anodic oxidation of coal. Part IV. Examination of the ulmic acids

✍ Scribed by Belcher, R.

Publisher
Wiley (John Wiley & Sons)
Year
1948
Weight
366 KB
Volume
67
Category
Article
ISSN
0368-4075

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✦ Synopsis

Abstract

A detailed examination has been made of the ulmic acids obtained by the anodic oxidation of the Meltonfield vitrain. The ulmic acids were fractionated into acetone‐soluble and acetone‐insoluble portions. The former fraction yielded an appreciable extract when treated with ether, although none was obtained when the original acids were extracted directly with ether. Although this ether‐soluble portion was resin‐like in appearance, the products obtained on destructive distillation were not sufficiently different from those obtained by similar treatment of ulmic acids, to classify it as being resinic. Molecular weights, equivalent weights and ultimate analyses of the various fractions bear a close resemblance to those of ulmic acid fractions obtained from coal by other oxidizing agents. A limiting composition for the ulmic acids appeared to be reached after prolonged treatment.

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The anodic oxidation of coal. Part II. T
The anodic oxidation of coal. Part II. The effect of oxidizing vitrain and ulmic acids at various metal anodes
✍ Belcher, R. 📂 Article 📅 1948 🏛 Wiley (John Wiley & Sons) ⚖ 272 KB

## Abstract An estimation of the yields obtained when coal and ulmic acids are oxidized at copper, lead and platinum anodes has been made. It was found that both ulmic acids and water‐soluble acids were produced in appreciable amounts when the Meltonfield vitrain was oxidized at a copper anode, the

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