BS 507-1985 Specification for ethanol for industrial use《工业用乙醇规范》.pdf

1、BRITISH STANDARD BS 507:1985 Specification for ethanol for industrial use UDC 66.061:547.262-145:661.722BS507:1985 This British Standard, having been prepared under the directionof the Chemicals Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 29 Nove

2、mber 1985 BSI 08-1999 First published October 1933 First revision March 1950 Second revision December 1956 Third revision July 1966 Fourth revision November 1985 The following BSI references relate to the work on this standard: Committee reference CIC/51 Draft for comment 83/51659 DC ISBN 0 580 1467

3、1 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Chemicals Standards Committee (CIC/-) to Technical Committee CIC/51 upon which the following bodies were represented: British Pharmacopoeia Commission British Society of Perfumers Chemi

4、cal Industries Association Cosmetic, Toiletry and Perfumery Association Limited Department of Trade and Industry, Laboratory of the Government Chemist Ministry of Defence Royal Society of Chemistry Amendments issued since publication Amd. No. Date of issue CommentsBS507:1985 BSI 08-1999 i Contents P

5、age Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Description 1 3 Sampling and size of sample 1 4 Colour 1 5 Strength 1 6 Residue on evaporation 1 7 Miscibility with water 1 8 Alkalinity or acidity 1 9 Carbonyl compounds content 1 10 Permanganate time 1 11 Methanol content 1 Appe

6、ndix A Relation between density in vacuo, density in air and ethanolic strength 2 Table 1 Relation between density in vacuo, density in air and ethanolic strength 2 Publications referred to Inside back coverBS507:1985 ii BSI 08-1999 Foreword This revision of this British Standard, one of a series fo

7、r solvents and allied products, has been prepared under the direction of the Chemicals Standards Committee and supersedes BS 507:1966, which is withdrawn. It comprises a specification for ethanol to meet the requirements of a wide range of industrial users. It does not, however, apply to material in

8、tended for medicinal use, which is included in the British Pharmacopoeia. First published in 1933, and last revised in 1966, the standard has again been revised, primarily to take account of metrication. In particular, the strength of the material is now expressed as a percentage by volume instead o

9、f degrees over proof (O.P.). However, it also differs from the previous edition in that the requirement for residue on evaporation has been altered from 0.01 % to 0.005 % and new requirements have been introduced in respect of permanganate time and methanol content. The test methods associated with

10、the specifications are not included. Instead, reference is made to BS 6392, a new British Standard which implements ISO 1388, a comprehensive series of tests for commercial grades of ethanol prepared, with the active participation of the United Kingdom, by Technical Committee 47 “Chemistry” of the I

11、nternational Organization for Standardization (ISO). For many purposes, for example in various analytical procedures, industrial methylated spirits complying with BS 3591 may be used as an alternative to ethanol. In such cases, it is not permissible to use duty-free ethanol, received under the provi

12、sions of The Alcoholic Liquor Duties Act, 1979, Section 10. At the time of publication of this British Standard, no corresponding international standard exists. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for t

13、heir 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 and 2, an inside back cover and a back cover. This standard has been updated

14、(see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS507:1985 BSI 08-1999 1 1 Scope This British Standard specifies requirements for ethanol suitable for industrial use. It does not apply to material for medicinal us

15、e. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Description The material shall be clear and free from matter in suspension, as assessed by visual inspection, and shall consist, apart from water, essentially of ethanol, C 2 H 5 OH. 3 Sampling

16、and size of sample 1) A representative sample of the material measuring not less than 2500 mL shall be taken from the bulk for the purpose of examination in accordance with this standard. The sample shall be placed in a clean, dry and air-tight, ground glass-stoppered bottle, or screw-capped bottle

17、fitted with a polyethylene cone insert, of such capacity that it is almost 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. NOTESufficient ullage should be left in the bottle to avoid excessive pressure

18、changes that could arise from temperature variations during storage and handling. About 10 % ullage is recommended. 4 Colour The colour of the material shall not exceed 15 Hazen units when measured by the method described in BS 5339. 5 Strength The strength of the material, expressed as a percentage

19、 by volume of ethanol, shall be not lower than 94.7 % (V/V) at 20 C 2) . The actual strength shall be specified as a percentage by volume of ethanol. NOTEThe strength may be determined by means of a glass alcohol hydrometer of the type specified in BS 5470 and the appropriate tables, or by means of

20、a density bottle (pyknometer) 3) . For the relationship between density in vacuo, density in air and ethanol content see Appendix A. 6 Residue on evaporation The residue on evaporation of the material shall not exceed 0.005 % (m/m) when determined by the method described in BS 4524. 7 Miscibility wi

21、th water The material shall not show opalescence when diluted 1 + 19 by volume with water complying with the requirements of BS 3978, and tested by the method described in BS 6392-5. 8 Alkalinity or acidity The material shall not be alkaline to phenolphthalein and any acidity, calculated as acetic a

22、cid (CH 3COOH), shall not exceed 0.005 % (m/m) when determined by the method described in BS 6392-1. 9 Carbonyl compounds content The carbonyl compounds content of the material, calculated as acetaldehyde (CH 3 CHO), shall not exceed 0.10 % (m/m) when determined by the method described in BS 6392-3.

23、 10 Permanganate time The permanganate time shall exceed 15 min when determined by the method described in BS 6392-9. 11 Methanol content The methanol content of the material shall not exceed 0.05 % (V/V) when determined by the method described in BS 6392-6. 1) Detailed information on the sampling o

24、f liquid chemical products is given in BS 5309-1 and BS 5309-3. 2) Strengths normally supplied range from 94.7 % (V/V) to 96.4 % (V/V) and from 99.5 % (V/V) to 99.9 % (V/V). 3) For example, a Gay-Lussac pyknometer complying with BS 733-1 is suitable.BS507:1985 2 BSI 08-1999 Appendix A Relation betwe

25、en density in vacuo, density in air and ethanolic strength Table 1 gives the relation between density in vacuo, density in air and ethanolic strength, expressed either as a percentage by volume, or as a percentage by mass, at 20 C. The values for density in vacuo are taken from “Practical alcohol ta

26、bles” volume 2, issued by the Commission of the European Communities. The values for density in air are calculated from the formula relating the temperatures (in C), the percentage by mass of ethanol and the densities in vacuo (in kg/m 3 ) contained in “Recommendation No.22” of the International Org

27、anization of Legal Metrology. Densities in vacuo have been converted into densities in air using the conventional values for the density of air and that of the masses adopted in “Recommendation No. 33” of that Organization. Table 1 Relation between density in vacuo, density in air and ethanolic stre

28、ngth Ethanolic strength at 20 C Density in vacuo (kg/m 3 ) as indicated by EEC pattern glass hydrometer at Density in air (kg/m 3 ) a % (V/V) % (m/m) 10 C 15 C 20 C 25 C 20 C 90.00 90.50 91.00 91.50 92.00 92.50 93.00 93.50 94.00 94.50 95.00 95.50 96.00 96.50 97.00 97.50 98.00 98.50 99.00 99.50 100.0

29、0 85.66 86.31 86.97 87.63 88.29 88.96 89.64 90.32 91.01 91.70 92.41 93.12 93.84 94.57 95.31 96.05 96.81 97.59 98.38 99.18 100.00 837.6 836.0 834.2 832.6 830.8 829.2 827.4 825.6 823.6 821.8 819.8 818.0 816.0 813.8 811.8 809.6 807.4 805.2 802.8 800.2 797.8 833.4 831.8 830.2 828.4 826.6 825.0 823.2 821

30、.4 819.4 817.6 815.6 813.8 811.8 819.6 807.6 805.4 803.2 801.0 798.6 796.2 793.6 829.2 827.6 826.0 824.2 822.4 820.8 819.0 817.2 815.2 813.4 811.4 809.6 807.6 805.4 803.4 801.2 799.0 796.8 794.4 792.0 789.4 825.0 823.4 821.6 820.0 818.2 816.4 814.6 812.8 811.0 809.2 807.2 805.2 803.2 801.2 799.2 797

31、.0 794.8 792.6 790.2 787.8 785.2 828.10 826.44 824.75 823.05 821.31 819.55 817.77 815.95 814.10 812.22 810.30 808.34 806.34 804.29 802.19 800.04 797.82 795.54 793.17 790.72 788.16 a Values for density in air are quoted to five significant figures because it is possible to determine density in air to

32、 a greater accuracy than the density in vacuo using a hydrometer.BS507:1985 BSI 08-1999 Publications referred to BS 733, Pyknometers. BS 733-1, Specification. BS 3591, Specification for industrial methylated spirits 4) . BS 3978, Water for laboratory use. BS 4524, Method for determination of residue

33、 on evaporation on a water bath. BS 5309, Methods for sampling chemical products. BS 5309-1, Introduction and general principles. BS 5309-3, Sampling of liquids. BS 5339, Method of measurement of colour in Hazen units (platinum-cobalt scale) of liquid chemical products. BS 5470, Specification for gl

34、ass alcohol hydrometers not incorporating a thermometer. BS 6392, Testing of ethanol for industrial use. BS 6392-1, Method for detection of alkalinity or determination of acidity to phenolphthalein. BS 6392-3, Method for determination of carbonyl compounds content present in moderate amounts (titrim

35、etric method). BS 6392-5, Method of test for miscibility with water. BS 6392-6, Method for determination of methanol content 0.01 % (V/V) to 0.20 % (V/V) (photometric method). BS 6392-9, Method for determination of permanganate time. 4) Referred to in the foreword only.BS 507:1985 BSI 389 Chiswick H

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