BS 579-1957 Specification for diethyl ether (technical)《工业用二乙醚规范》.pdf
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1、BRITISH STANDARD BS579:1957 Specification for Diethyl ether (technical)BS579:1957 This BritishStandard, having been approved by the Fine andHeavy Chemicals IndustryStandards Committeeand endorsed bythechairman of the ChemicalDivisional Council, waspublished by the authorityofthe General Councilon 31
2、December1957 BSI12-1999 First published November1934 First revision March1951 Second revision December1957 The following BSI references relate to the work on this standard: Committee reference FHC/4 and FHC/4/5 Draft for comment CX(FHC)2046 ISBN 0 580 34006 6 Co-operating organizations The Fine and
3、Heavy Chemicals Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Association of British Chemical Manufacturers* Board of Trade British Iron and S
4、teel Federation British Railways, The British Transport Commission Fertilizer Manufacturers Association Gas Council Institution of Gas Engineers Ministry of Health Ministry of Supply* National Sulphuric Acid Association The Government department and industrial organization marked with an asterisk in
5、 the above list, together with the following, were directly represented on the committees entrusted with the preparation of this BritishStandard: Admiralty Association of Cellulose Lacquer Manufacturers British Plastics Federation Department of the Government Chemist Institute of Petroleum National
6、Paint Federation Oil and Colour Chemists Association Pharmaceutical Society of Great Britain Royal Institute of Chemistry Society for Analytical Chemistry Society of Chemical Industry Society of Motor Manufacturers and Traders Ltd. Individual manufacturers Amendments issued since publication Amd. No
7、. Date CommentsBS579:1957 BSI 12-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Description 1 2 Specific gravity 1 3 Distillation range 1 4 Water 1 5 Residue on evaporation 1 6 Acidity 1 7 Peroxides 1 8 Sulphur compounds 1 9 Sample 1 Appendix A Method for the determ
8、ination of distillation range 2 Appendix B Method for the determination of residue on evaporation 4 Appendix C Method for the determination of acidity 4 Appendix D Method for the detection of peroxides 4 Appendix E Method for the detection of sulphur compounds 5 Figure 1 Assembly of distillation fla
9、sk, draught screen and water bath 3BS579:1957 ii BSI 12-1999 Foreword This standard makes reference to the following BritishStandards: BS571, Flasks for the determination of distillation range. BS593, Laboratory thermometers. BS604, Graduated measuring cylinders. BS605, Distillation receivers (inclu
10、ding Crow receivers). BS658, Apparatus for the determination of distillation range. BS2511, Determination of water by the Karl Fischer method. This standard forms one of a series of BritishStandards for solvents and allied products. First issued in1934, it was revised in1951 and the present edition
11、has been prepared as the result of a review of the standard in the light of present-day requirements. The standard does not apply to material intended for medicinal use, which is included in the British Pharmacopia. The technical content of the standard is substantially unchanged, but specific gravi
12、ty limits at25/25 C have been introduced for use in tropical climates and a limit for water, determined by the Karl Fischer method, has been set. The opportunity has also been taken to clarify the wording of the standard and to bring it into line with current conventions. A British Standard does not
13、 purport to include all the necessary provisions 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 fr
14、ont cover, pagesi andii, pages1 to5 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.BS579:1957 BSI 12-1999 1 1 Description BritishStandard diethyl ether (technical)
15、 shall be clear, colourless and free from matter in suspension, and shall consist essentially of diethyl ether, 1)C 2 H 5 OC 2 H 5 . 2 Specific gravity The specific gravity of the material at any one of the following temperatures shall be within the appropriate values as shown: 3 Distillation range
16、2) The material, on distillation in the manner described in Appendix A, shall yield at760mmHg pressure not less than95.0per cent by volume below36.0 C. 4 Water The material shall not contain more than1.0per cent by weight of water, determined in the manner described inBS2511 3) . 5 Residue on evapor
17、ation 2) The material shall not leave more than0.005per cent by weight of residue when tested in the manner described in Appendix B. 6 Acidity The material shall not contain more than0.002per cent by weight of acid, calculated as sulphuric acid, H 2 SO 4 , and determined in the manner described in A
18、ppendix C. 7 Peroxides 2) The material shall not show any peroxide when tested in the manner described in Appendix D. 8 Sulphur compounds The material shall not show any sulphur compounds when tested in the manner described in Appendix E. 9 Sample For the purpose of examination under this specificat
19、ion, a representative sample of the material measuring not less than half a litre shall be taken from an original and previously unopened container or from the bulk during packing, as may be arranged. The sample shall be placed in a clean, dry and air-tight glass-stoppered bottle of dark amber glass
20、 of such size that it is nearly filled by the sample. When it is necessary to seal the container, care shall be taken to avoid the risk of contaminating the contents in any way. 1) This name is approved by the International Union of Pure and Applied Chemistry. Temperature Specific gravity 15.5/15.5
21、C 20/20 C 25/25 C min. 0.719 0.714 0.709 max. 0.725 0.720 0.715 2) Owing to the inflammable nature of diethyl ether and its vapour, special care should be taken in performing the tests for distillation range and residue on evaporation. In rare cases, particularly where the material has been improper
22、ly stored, there may be an element of risk of explosion in carrying out the distillation and residue on evaporation tests, due to the presence of peroxides. It should always be ensured that peroxides are absent (see Appendix D) before commencing these determinations. 3) BS2511, “Determination of wat
23、er by the Karl Fischer method”.BS579:1957 2 BSI 12-1999 Appendix A Method for the determination of distillation range NOTEOwing to the inflammable nature of diethyl ether and its vapour, special care should be taken in carrying out this determination. In rare cases, particularly where the material h
24、as been improperly stored, there may be an element of risk of explosion in carrying out this test, due to the presence of peroxide. It should always be ensured that peroxides are absent (see Appendix D) before commencing this determination. Apparatus The apparatus required, part of which is shown in
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