1、BRITISH STANDARD CONFIRMED APRIL 1993 BS 506-1:1987 Methanol for industrial use Part 1: Specification for methanol UDC 661.721:543.06 BS506-1:1987 This British Standard, having been prepared under the directionof the Chemicals Standards Committee, was published under the authority ofthe Board of BSI
2、 and comes intoeffect on 30 January 1987 BSI 10-1999 The following BSI references relate to the work on this standard: committee references CIC/51 Draft for comment 85/50950 DC ISBN 0 580 15565 X Committees responsible for this British Standard The preparation of this British Standard was entrusted
3、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 Chemical Industries Association Department of Trade and Industry (Laboratory of the Government Chemist) Royal So
4、ciety of Chemistry Amendments issued since publication Amd. No. Date of issue CommentsBS506-1:1987 BSI 10-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Description 1 3 Sampling and size of sample 1 4 Colour 1 5 Density 1 6 Distillation range 1 7 Residue on ev
5、aporation 1 8 Miscibility with water 1 9 Alkalinity or acidity 1 10 Aldehydes and ketones 1 11 Sulphur compounds 1 12 Permanganate test 1 13 Water content 1 Publications referred to Inside back coverBS506-1:1987 ii BSI 10-1999 Foreword This Part of BS 506, which has been prepared under the direction
6、 of the Chemicals Standards Committee, comprises a specification for methanol to meet the requirements of a wide range of industrial users. First published in 1933, BS 506 was last revised in 1966 and was subsequently amended to become BS 506-1. In this revision of BS 506-1, the requirements for ald
7、ehydes and ketones content, sulphur compounds, and the permanganate test have been replaced by one for density at 20 C and there is now a requirement for water content. In addition, the test methods associated with the specification are now published as BS 506-2. This standard supersedes BS 506-1:19
8、66, which is withdrawn. A British Standard does not 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
9、This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside 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.BS5
10、06-1:1987 BSI 10-1999 1 1 Scope This British Standard specifies requirements for methanol suitable for industrial purposes. NOTEThe titles of the publications referred to in this standard are listed on inside back cover. 2 Description The material shall be clear and free from matter in suspension, a
11、s assessed by visual inspection, and shall consist essentially of methanol, CH 3 OH. 3 Sampling and size of sample A sample of not less than 1 L shall be taken in accordance with BS 506-2. 4 Colour The colour of the material shall not exceed 15 Hazen units when measured as described in BS 5339. 5 De
12、nsity The density of the material at 20 C shall be not lower than 0.791 g/mL and not higher than 0.794 g/mL when determined as described in BS 4522. 6 Distillation range When the material is distilled as described in BS4591, modified as specified in BS 506-2, the distillation range at 1013 mbar 1)pr
13、essure shall not exceed 1.0 C and shall include the value 64.6 C. 7 Residue on evaporation The residue on evaporation on the material shall not exceed 0.001 % (m/m) when determined as described in BS 4524. 8 Miscibility with water The material shall not show opalescence when mixed with distilled wat
14、er as described in BS 506-2. 9 Alkalinity or acidity The material shall not be alkaline to phenolphthalein and shall not contain more than0.003 % (m/m) of acid, calculated as formic acid(HCOOH) and determined as described in BS506-2. 10 Aldehydes and ketones The material shall not contain more than0
15、.005%(m/m) of aldehydes and ketones, calculated as acetone (CH 3 COCH 3 ) and determined by the spectrometric method described in BS 506-2. 11 Sulphur compounds The material shall not contain more than0.0001%(m/m) of sulphur compounds, calculated as S and determined as described in BS506-2. 12 Perma
16、nganate test The material shall not cause the colour of a standard potassium permanganate solution to fade sufficiently in 30 min to match or be lighter than the matching solution when tested as described in BS506-2. 13 Water content The material shall not contain more than0.1%(m/m) of water when de
17、termined as described in clause 2 of BS 2511:1970. 1) 1 mbar 100 N/m 2= 100 Pa.2 blankBS506-1:1987 BSI 10-1999 Publications referred to BS 506, Methanol for industrial use. BS 506-2, Methods of test. BS 2511, Methods for the determination of water (Karl Fischer method). BS 4522, Method for the deter
18、mination of density of liquids at 20 C. BS 4524, Method for the determination of residue on evaporation on a water bath. BS 4591, Method for the determination of distillation characteristics. BS 5339, Method of measurement of colour in Hazen units (platinum-cobalt scale) of liquid chemical products.
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