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ISO 647:1974

Brown coals and lignites — Determination of the yields of tar, water, gas and coke residue by low temperature distillation

Nov 1, 1974
95.99   Withdrawal of Standard   Jul 19, 2017

General information

95.99     Jul 19, 2017

ISO

ISO/TC 27/SC 5

International Standard

73.040  

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Scope

The sample is heated in an aluminium retort to a temperatur of 520 °C. The products of decomposition pass into a water-cooled receiver; the tar and water are condensed while gaseous products pass to atmosphere. The coke residue and the receiver and its contents are weighed. The mass of tar is obtained by difference to the mass of water determined by entrainment with toluene or xylene. A separate determination of moisture in the coal, also by entrainment with tulene or xylen, is amde so that the decomposition water can be calculated. The peecentage of gas is obtained by subtracting from 100 the sum of the percentages of coke residue, of tar and decomposition water.

Life cycle

NOW

WITHDRAWN
ISO 647:1974
95.99 Withdrawal of Standard
Jul 19, 2017

REVISED BY

PUBLISHED
ISO 647:2017