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Ref. No. : ISO/R 1017-1969 (E)
UDC 662.642 : 543.83 : 547.284.3
IS0
INTERN AT I ON A L ORGAN IZ AT1 O N FOR STAND AR D I ZATi O N
IS0 RECOMMENDATION
R 1017
BENZENE EXTRACT FROM BROWN COALS AND LIGNITES
DETERMI NATION OF ACETONE-SOLUBLE MATERIAL
("RESINOUS SUBSTANCES")
1st EDITION
March 1969
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 101 7, Benzene extract from brown coals and lignites - Determination of acetone-
soluble material (“Resinous substances”), was drawn up by Technical Committee ISO/TC 27, Solid mineral fuels, the
Secretariat of which is held by the British Standards Institution (BSI).
Work on this question led, in 1966, to the adoption of a Draft IS0 Recommendation.
In August 1967, this Draft IS0 Recommendation (No. 1284) was circulated to all the IS0 Member Bodies for
enquiry. It was approved, subject to a few modifications of an editorial nature, by the following Member Bodies :
Australia Italy Switzerland
Austria Korea, Rep. of Turkey
Canada Netherlands U.A.R.
Czechoslovakia New Zealand United Kingdom
Denmark Portugal U.S.S.R.
France Romania Yugoslavia
India South Africa, Rep. of
Iran Spain
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council, which decided, in
March 1969, to accept it as an IS0 RECOMMENDATION.
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ISO/R 101 7-1 969(E)
IS0 Recommendation R 1017 March 1969
BENZENE EXTRACT FROM BROWN COALS AND LIGNITES
DETERMINATION OF ACETON E-SO LUB LE MATER IAL
("R ES1 NOUS SUBSTANCES")
1. SCOPE
This IS0 Recommendation describes a method of determining the amount of acetone-soluble material ("resinous
substances") in the benzene extract from brown coals and lignites.
NOTE. - The acetone extract will also contain a percentage of wax dissolved simultaneously with the "resinous substances".
2. PRINCIPLE
The sample of benzene extract from brown coal or lignite obtained by the procedure described in IS0 Recommen-
dation R 915, Determination of the yield of benzene-soluble extract in brown coals and lignites. is extracted with
acetone at a temperature of 18 to 22 "C. The soluble fraction is filtered or centrifuged off and after evaporation of
the solvent dried to constant mass. The percentage of acetone-soluble material is calculated from the mass of residue
after drying.
NOTE. - The high selectivity of acetone requires a strict temperature control during the determination. The temperature of the
solvent, the room temperature at the beginnigg of the determination and the room temperature at the end of the determination should
not differ from each other by more than 0.5 C and should be within the range 18 to 22 " C.
3. SAMPLE
The residue obtained from the benzene extract is crushed and passed through a sieve of 0.1 mm aperture.
If the residue is a viscous liquid it is cooled in solid carbon dioxide to -80 "C and then crushed.
4. REAGENT
Acetone, of analytical reagent quality.
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ISO/R 1 O1 7 -1 969(E)
5. APPARATUS
Centrifuge, capable of being spun at 1600 rev/min.
5.1
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