𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The anodic oxidation of coal. Part I. Introduction and preliminary experiments

✍ Scribed by Belcher, R.

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

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A brief summary is given of the reactions which occur when coal is oxidized. The earlier work of Lynch and Collett on the anodic oxidation of coal is reviewed and their findings are summarized. After some experience with the technique, a suitable assembly has been developed which eliminates the troubles caused by excessive foaming. After oxidizing a vitrain at a copper anode, the products were separated into ulmic acids and water‐soluble acids, the latter being further sub‐divided into ether‐soluble and acetone‐soluble portions.

The ulmic acids have been examined and appear to be similar in type to those obtained from coal using other types of oxidant. They were separated into acetone‐soluble and acetone‐insoluble portions to facilitate examination. The acetone‐soluble portion yielded an appreciable amount of material when extracted with ether, although this solvent removed nothing from the original material. The water‐soluble material consists of two distinct types of material, viz., a portion soluble in ether and one soluble in acetone. The ether‐soluble material is capable of salt formation and appears to be identical with that isolated by Lynch and Collett, but the acetone‐soluble portion is incapable of salt formation, is dark‐brown in appearance and is highly oxygenated.

📜 SIMILAR VOLUMES

The anodic oxidation of coal. Part V. Mi
The anodic oxidation of coal. Part V. Miscellaneous experiments
✍ Belcher, R. 📂 Article 📅 1948 🏛 Wiley (John Wiley & Sons) ⚖ 550 KB

## Abstract A number of miscellaneous experiments has been undertaken using the apparatus described in previous papers. An anthracite has been oxidized at the copper cathode and, as is to be expected, much smaller yields were obtained than from a similar treatment of a vitrain. The amount of water‐

The anodic oxidation of coal. Part IV. E
The anodic oxidation of coal. Part IV. Examination of the ulmic acids
✍ Belcher, R. 📂 Article 📅 1948 🏛 Wiley (John Wiley & Sons) ⚖ 366 KB

## 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, althoug

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

The anodic oxidation of coal. Part III.
The anodic oxidation of coal. Part III. Examination of the water-soluble acids
✍ Belcher, R. 📂 Article 📅 1948 🏛 Wiley (John Wiley & Sons) ⚖ 540 KB

## Abstract The water‐soluble acids obtained by the oxidation of the Melton‐field vitrain at a copper anode, have been subjected to a detailed examination with the object of isolating recognizable products. Chromatographic methods of separation proved unsuccessful. The two fractions obtained after

The structure of anodic films—I. An elec
The structure of anodic films—I. An electron diffraction examination of the products of anodic oxidation on tantalum, niobium and zirconium
✍ P.H.G Draper; J Harvey 📂 Article 📅 1963 🏛 Elsevier Science ⚖ 999 KB

It has been shown previously that the kinetics of anodic film growth on Ta, Nb and Zr often depend strongly on the nature of the electrolyte. This work is an attempt to resolve this anomaly and the inconsistencies in the reported structures of the oxide layers. Electron diffraction showed the anodic