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Close connections were found between the thermal stabilities of coke raw materials during heating up to the coking temperature and their thermal analysis data. The obtained coking residues were in correlation with the coke yield of non-pressurized coking.

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Thermal analysis was carried out on peat and its residues after successive separation of water-soluble substances (6.8%), bitumens (3.9%), hemicellulose (5.9%), humic acids (33.4%) and cellulose (21.5%). The primary peat gives two exothermal effects, at 290° and at 275°. After humic acid and cellulose separation, respectively, the second effect decreases and then disappears completely.

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The thermal behaviour of some Cu(II) compounds formed with 1,4-disubstituted piperazine derivatives has been studied. The investigations were performed on a MOM 1500 derivatograph. The endothermic effects observed at 170–180°C are associated with the processes of dehydration and dehalogenation of the compounds, with general formula LH2·CuCl4·H2O, whereL is the piperazine derivative. The residue at 600°C remains relatively constant.

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Thermal analysis of disazo pigments

I. Derivatives of l,4-bis(5′-hydroxy-7′-sulpho-2′-naphthyl)-benzenediamine

Journal of Thermal Analysis and Calorimetry
G. Simeonov
A. Draganov
, and
D. Rustschev
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The thermal behaviour of three gagates (Bulgaria) was investigated by DTA and TG. The characteristic endo- and exoeffects and the sequence of the thermal stabilities are established.

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