BS 2713-1966 Specification for 2-ethoxyethanol (ethylene glycol monoethyl ether)《2-乙氧基乙醇(乙二醇-乙基酯)规范》.pdf

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1、BRITISH STANDARD BS2713:1966 Incorporating Amendment No.1 Specification for 2-Ethoxyethanol (Ethylene glycol monoethyl ether)BS2713:1966 This BritishStandard, having been approved by the ChemicalsIndustry StandardsCommittee and endorsed by the Chairman oftheChemical Divisional Council, was published

2、 undertheauthority of the GeneralCouncil on 28October1966 BSI12-1999 First published May1956 First revision October1966 The following BSI references relate to the work on this standard: Committee references CIC/4 andCIC/4/5 Draft for comment D65/4963 ISBN 0 580 35991 3 Co-operating organizations The

3、 Chemicals Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and industrial organizations: Board of Trade British Iron & Steel Federation Chemical Industries Association* Fertilizer Manufactu

4、rers Association Gas Council Institute of Vitreous Enamellers Institution of Gas Engineers Ministry of Defence, Army Department* Ministry of Health National Sulphuric Acid Association Royal Institute of Public Health & Hygiene The Government department and industrial organization marked with an aste

5、risk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this BritishStandard: British Pharmacopia Commission British Plastics Federation Ministry of Defence, Navy Department Ministry of Technology Laboratory of the Government

6、Chemist Oil and Colour Chemists Association Pharmaceutical Society of Great Britain Research Association of British Paint, Colour & Varnish Manufacturers Royal Institute of Chemistry Society for Analytical Chemistry Society of Chemical Industry Society of Motor Manufacturers and Traders Ltd. Toilet

7、Preparations Federation Amendments issued since publication Amd. No. Date of issue Comments 7628 May1993 Indicated by a sideline in the marginBS2713:1966 BSI 12-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Description 1 3 Colour 1 4 Relative density 1 5

8、Distillation range 1 6 Miscibility with water 1 7 Water 1 8 Alkalinity or acidity 1 9 Sampling and size of sample 1 Appendix A Limit test for colour 2 Appendix B Method for the determination of distillation range 2 Appendix C Test for miscibility with water 3 Appendix D Method for the detection of a

9、lkalinity or determination of acidity 3BS2713:1966 ii BSI 12-1999 Foreword This standard makes reference to the following BritishStandards: BS593, Laboratory thermometers. BS604, Graduated measuring cylinders. BS612, Nessler cylinders. BS658, Apparatus for the determination of distillation range. BS

10、1792, One-mark volumetric flasks. BS2511, Methods for the determination of water (Karl Fischer method). BS3591, Industrial methylated spirits. BS3978, Water for laboratory use. BS4591, Method for determination of distillation characteristics of organic liquids (other than petroleum products). This s

11、tandard forms one of a series of BritishStandards for solvents and allied products. The preparation of this standard was authorized originally by the Fine Chemicals Industry Standards Committee (now merged in the Chemicals Industry Standards Committee). This BritishStandard was first issued in1956.

12、In the present revision the limits for relative density, water content and acidity have been made more stringent. The requirements in respect of distillation range now specify initial boiling point and dry point. A specific colour requirement has been included. A British Standard does not purport to

13、 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 front cover,

14、pagesi andii, pages1 to3 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.BS2713:1966 BSI 12-1999 1 1 Scope This BritishStandard specifies requirements for2-ethoxyet

15、hanol suitable for industrial purposes. 2 Description BritishStandard2-ethoxyethanol shall be clear and free from matter in suspension, and shall consist essentially of2-ethoxyethanol, C 2 H 5 O.CH 2 .CH 2 OH. 3 Colour The colour of the material shall not exceed15 Hazen units when measured by the me

16、thod described in Appendix A or by a suitable instrumental method. 4 Relative density The relative density 1)of the material at any one of the following temperatures shall be within the appropriate values as shown below: 5 Distillation range When the material is distilled by the method described in

17、Appendix B, the initial boiling point at760mmHg pressure shall not be below133.5 C and the dry point at760mmHg pressure shall not be above136.5 C. 6 Miscibility with water The material shall not show any opalescence when mixed with distilled water by the method described in Appendix C. 7 Water The m

18、aterial shall not contain more than0.1% by mass of water, determined by the method described in Clause2 of BS2511:1970 2)and using20ml of the material. 8 Alkalinity or acidity The material shall not be alkaline to phenolphthalein and shall not contain more than50 parts per million by mass of acid, c

19、alculated as acetic acid CH 3 COOH, determined by the method described in Appendix D. 9 Sampling and size of sample A representative sample of the material measuring not less than one litre shall be taken from the bulk for the purpose of examination in accordance with this specification. The sample

20、shall be placed in a clean, dry and air-tight glass-stoppered bottle of such a 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. NOTEThe BritishStandards Institution is the owner of

21、 a registered certification trade mark. This is shown below, enclosed in the words “Approved to BritishStandard”. This mark can be used only by manufacturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance tha

22、t the goods have been produced to comply with the requirements of the BritishStandard under a system of supervision, control and testing operated during manufacture and including periodical inspection at the manufacturers works in accordance with the certification mark scheme of the BSI. Further par

23、ticulars of the terms of licence may be obtained from the Director, BritishStandards Institution,2 Park Street, London W.1. 1) Formerly “specific gravity”: “relative density” is the term adopted for this concept, with water as the reference substance, by the International Organization for Standardiz

24、ation (ISO). Temperature Relative density C 15.5/15.5 20/20 25/25 min. 0.934 0.931 0.928 max. 0.937 0.934 0.931 2) BS2511, “Methods for the determination of water (Karl Fischer method)”.BS2713:1966 2 BSI 12-1999 Appendix ALimit test for colour A.1 Apparatus a) Two Nessler cylinders 3) ,100ml capacit

25、y. b) One-mark volumetric flask 4) ,500ml capacity. c) One-mark volumetric flask 4) ,250ml capacity. A.2 Reagents The reagents used shall be of a recognized analytical reagent quality. Water complying with BS3978 5)shall be used throughout. a) Cobaltous chloride, hexahydrate. b) Hydrochloric acid, c

26、oncentrated, d=1.18. c) Chloroplatinic acid reagent. Dissolve250mg of platinum in a small quantity of aqua regia contained in a glass or porcelain basin by heating on a water bath. When the metal has dissolved evaporate the solution to dryness. Add1ml of the hydrochloric acid and again evaporate to

27、dryness. Repeat this operation twice more. A.3 Preparation of colour standard Dissolve0.50g of the cobaltous chloride hexahydrate and the whole of the chloroplatinic acid (prepared as described above) in50ml of the hydrochloric acid. Warm, if necessary, to obtain a clear solution and after cooling,

28、pour into the500ml volumetric flask. Dilute with water to the mark. Pipette7.5ml of this solution into the250ml volumetric flask. Dilute with water up to the graduation mark. This diluted solution has a colour of15Hazen units and should always be freshly prepared. A.4 Procedure Fill one of the Nessl

29、er cylinders to the mark with the sample, and the other with the colour standard. Using a white background, compare the colours. Appendix BMethod for the determination of distillation range B.1 Apparatus The apparatus required is described in BS658 6)and comprises: a) Distillation flask of100ml dist

30、illation capacity conforming to BS658 6) . b) Thermometer No. F150C/100 complying with the requirements of BS593 7) . c) Condenser, Type1, complying with the requirements of BS658 6) . d) Draught screen, Type C, and non-asbestos heat-resistant flask support sheet with50mm diameter central hole, comp

31、lying with the requirements of BS658 6) . B.2 Procedure Assemble the apparatus as described in BS658 6) . Measure100ml of the sample into the distillation flask from a graduated measuring cylinder 8)and add a few anti-bumping granules. Place the flask, thermometer and a suitable receiver in position

32、 and ensure that the condenser has a steady supply of water. Adjust the rate of heating so that the first drop of distillate falls from the end of the condenser in7 to12minutes. Read the temperature at the instant the first drop falls from the end of the condenser and record as the observed initial

33、boiling point. Further adjust the rate of heating so that the distillate is collected at the rate of3 to4ml per minute. Read the temperature indicated at the instant the last drop of liquid evaporates from the lowest point in the distillation flask and record as the observed dry point. Disregard any

34、 liquid on the side of the flask. B.3 Corrections to be applied to the observed temperatures i) If the thermometer gives incorrect readings at the observed initial boiling point or observed dry point, correct the readings by subtracting the amount of error if the thermometer is reading high, or addi

35、ng the amount of error if the thermometer is reading low. ii) Read the barometer and apply the corrections as described in BS4591 9) . iii) When the corrected barometric pressure deviates from760mmHg, apply further corrections to the observed temperatures by subtracting0.041degC for every millimetre

36、 above760mm or adding0.041degC for every millimetre below760mm. NOTEThese last corrections are valid only for pressures above700mmHg. 3) BS612, “Nessler cylinders”. 4) BS1792, “One-mark volumetric flasks”. 5) BS3978, “Water for laboratory use”. 6) BS658, “Apparatus for the determination of distillat

37、ion range”. 7) BS593, “Laboratory thermometers”. 8) BS604, “Graduated measuring cylinders”. 9) BS4591, “Method for determination of distillation characteristics of organic liquids (other than petroleum products)”.BS2713:1966 BSI 12-1999 3 Appendix CTest for miscibility with water To5ml of the sample

38、 contained in a100ml Nessler cylinder, add95ml of distilled water, mix thoroughly and adjust to20 C. Examine vertically for opalescence against a black background with side illumination, using as a standard a similar cylinder containing100ml of distilled water. Appendix DMethod for the detection of

39、alkalinity or determination of acidity D.1 Reagents The reagents used shall be of a recognized analytical reagent quality. Water complying with BS3978 10)shall be used throughout. a) Sodium hydroxide,0.1N solution. b) Phenolphthalein indicator. Dissolve0.5g of phenolphthalein in100ml of ethanol 11)

40、(95% by volume) and make faintly pink by the addition of dilute sodium hydroxide solution. D.2 Procedure Place100ml of water and a few clean anti-bumping granules into a500ml conical flask of borosilicate glass and boil gently for five minutes to eliminate carbon dioxide. Cool slightly and add100ml

41、of the sample. Boil gently for a further five minutes. At the end of this period close the neck of the flask with a stopper carrying a soda-lime tube and allow to cool. When cold, remove the stopper, add0.5ml of the phenolphthalein indicator and examine for alkalinity: if not alkaline, titrate with

42、the sodium hydroxide solution using a microburette. D.3 Calculation Acidity, calculated as acetic acid, CH 3 COOH, parts per million by mass= where T=volume, in millilitres, of0.1N sodium hydroxide solution used and d=relative density of the sample. 10) BS3978, “Water for laboratory use”. 11) Ethano

43、l may be replaced by industrial methylated spirits,95% (v/v), complying with the requirements of BS3591. It should be noted that the use of industrial methylated spirits is governed by the Methylated Spirits Regulations,1983 (S.I.1983, No.252). It is not permissible to use duty-free ethanol, receive

44、d under the provisions of The Alcoholic Liquor Duties Act1979, Section10, for purposes for which industrial methylated spirits is an acceptable alternative. 60T d -BS2713:1966 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for

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