Nuclear Structure of the Water-soluble Polycarboxylic Acids from the Oxidation of Bituminous Coal: The Hydrogenolysis Reaction¹

Oxidation of Peat to Organic Acids

“…Further separation of the constituents of each group, necessary for identifying individual acids, has not yet been accomplished. Recent analytical investigations of related acids have involved chromatographic fractionation (34), spectrographic studies of the methyl esters (34), decarboxylation (12,34), hydrogenolysis (72), and solvent fractionation (40).…”

Case Study of Quantification of Aromatic Ring Structures in Lignite Using Sequential Oxidation

“…Various chemical methods, such as oxidation, hydrogenation, depolymerization, pyrolysis, alkylation, and halogenation, have been used to study the structure of coal. − As a result of its superior selectivity on the structure unit of coal, oxidation is a valuable method in elucidating the coal structure. − From oxidation of brown coal in alkaline solution (Na 2 CO 3 , O 2 , 85 °C, and atmosphere), Hayashi et al found that the amount of carboxyl groups formed peripherally on the neighboring clusters was equal to the amount of bridges bound to the eliminated aromatic clusters; the average amount of bridges per eliminated aromatic cluster was 1.3–2.9. This work employed a oxidation method of quantifying the bridges in brown coal.…”