BS-6043-1.2-1981 ISO-5939-1980.pdf
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1、BRITISH STANDARD BS 6043-1.2: 1981 ISO 5939:1980 Methods of sampling and test for Carbonaceous materials used in aluminium manufacture Part 1: Electrode pitch Section 1.2 Determination of water content (Dean and Stark method) ISO title: Carbonaceous materials for the production of aluminium Pitch fo
2、r electrodes Determination of water content Azeotropic distillation (Dean and Stark) method UDC 665.775:669.713.7:543.812 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:02:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.2:1981 This British Standard, having been prepared under the
3、direction of the Chemicals Standards Committee, was published under the authority of the Executive Board and comes into effect on 31 December 1980 BSI 10-1999 The following BSI references relate to the work on this standard Committee reference CIC/24 Draft for comment 78/56456 DC ISBN 0 580 11769 3
4、Cooperating organizations The Chemicals Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following: Association of Fatty Acid Distillers British Tar Industry Association* Chemical Industries Association* Chemical Society, Analytical
5、Division* Consumer Standards Advisory Committee of BSI Department of Health and Social Security Department of Industry (Laboratory of the Government Chemist) Fertiliser Manufacturers Association Ltd. Hydrocarbon Solvents Association Ministry of Agriculture, Fisheries and Food Ministry of Defence Nat
6、ional Sulphuric Acid Association Paintmakers Association of Great Britain Ltd. Royal Institute of Public Health and Hygiene Soap and Detergent Industry Association Standardization of Tar Products Tests Committee* The organizations marked with an asterisk in the above list, together with the followin
7、g, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: Aluminium Federation British Ceramic Research Association Institute of Petroleum Royal Institute of Chemistry Amendments issued since publication Amd. No.Date of issueComments Licensed Co
8、py: sheffieldun sheffieldun, na, Wed Dec 06 14:02:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.2:1981 BSI 10-1999i Contents Page Cooperating organizationsInside front cover National forewordii 1Scope and field of application1 2References1 3Principle1 4Reagent1 5Apparatus1 6Procedure1 7Exp
9、ression of results2 8Test report2 Annex ISO publications relating to the determination of water content in different products, using the azeotropic distillation (Dean and Stark) method4 Figure 1 Typical assembly of Dean and Stark apparatus (5.1)2 Figure 2 Suitable form of reflux condenser (5.1.3)3 F
10、igure 3 2 ml receiver (5.1.2)3 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:02:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.2:1981 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Che
11、micals Standards Committee to provide methods of sampling and test for carbonaceous materials used in the production of aluminium. The standard will be published in two Parts, each Part being divided into Sections. The two Parts are: Part 1: Electrode pitch; Part 2: Electrode coke. This Section is i
12、dentical with ISO 5939:1980 “Carbonaceous materials for the production of aluminium Pitch for electrodes Determination of water content Azeotropic distillation (Dean and Stark) method”, published by the International Organization for Standardization (ISO). Terminology and conventions. The text of th
13、e International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. The comma has been used throughout as a d
14、ecimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. Cross-references. There are no corresponding British Standa
15、rds for the following International Standards referred to in the text: ISO 59401) and ISO 62571). Subject to final approval by the United Kingdom, ISO 59401) and ISO 62571) will be published, without alteration, as further Sections of BS 6043. The technical committee has reviewed the provisions of I
16、SO 383:1976, to which reference is made in 5.1.1, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard for ISO 383:1976 is BS 572:1960 “Interchangeable ground glass joints”. The references to the ISO publications listed in the Annex are for i
17、nformation purposes only. Additional information Xylene. Analytical grades of xylene normally available in the United Kingdom, the boiling ranges of which may differ marginally from that of the products specified in 4.1, are nevertheless suitable for use in this determination. This standard prescrib
18、es methods of test only, and should not be used or quoted as a specification defining limits of purity. Reference to this Section should state that the method of test used complies with the requirements of BS 6043-1.2:1981. A British Standard does not purport to include all the necessary provisions
19、of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an insid
20、e back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In course of preparation. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:02:46 GMT+00:00
21、 2006, Uncontrolled Copy, (c) BSI BS 6043-1.2:1981 BSI 10-19991 1 Scope and field of application This International Standard specifies an azeotropic distillation method for the determination of the water content of pitch used in the production of aluminium. The method is applicable to pitches having
22、 water contents in the range 0,1 to 2 % (m/m). NOTEWater contents in excess of 2 % (m/m) may be determined by means of this method by using a larger receiver. 2 References ISO 383, Laboratory glassware Interchangeable conical ground joints. ISO 5940, Carbonaceaous materials for the production of alu
23、minium Pitch for electrodes Determination of softening point by the ring and ball method. ISO 6257, Carbonaceous materials for the production of aluminium Pitch for electrodes Sampling2). 3 Principle Heating the pitch under reflux with xylene. Collection in a receiver of the condensate of xylene and
24、 water and measurement of the volume of water which separates out in the graduated part of the receiver. 4 Reagent During the analysis, use only reagent of recognized analytical grade. 4.1 Xylene, or any of its isomers, or a mixture of these isomers in any proportion, provided that the boiling range
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