GB/T 3728-1991 Industrial Ethyl Acetate GB/T3728-1991 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Ethyl acetate for industrial useSubject content and scope of application
GB 3728-91
Replaces GB 3728:-83
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of industrial ethyl acetate. This standard applies to industrial ethyl acetate prepared by esterification of acetic acid and ethanol in the presence of a catalyst. Molecules CH.Cooc,H:
Relative molecular mass: 88.11 (according to the 1987 international atomic weight) 2 Reference standards
Dangerous goods packaging mark
Chemical reagents titration analysis (volume analysis) preparation of standard solution GB601
Chemical reagents, preparations and preparations used in test methods GB603
GB6680 General rules for sampling of liquid chemical products
GB/T12717T. Test methods for sub-acetic acid esters 3 Technical requirements
3.1 Appearance: transparent liquid, no floating impurities. 3.2 Industrial ethyl acetate should meet the requirements of the following table. Index name: Color (cobalt color number), bamboo, density: pgg/em, ethyl acetate, moisture, acidity (as CHsCOOH). Evaporation residue, K, 4 Test method: 0.897~-0.902. 4.1 Color: The colorimetric determination method specified in GB/T12717 is adopted. Standard
-Qualified products
0. B97 ~~ 0, 902
Qualified products
0.896~~0.902
Allowable difference: Take the arithmetic mean of the two test results as the test result, and the difference between the two parallel test results shall not be greater than 2. 1992-02-01 implementation
State Technical Supervision Bureau 1991-02-04 approved 4.2 degrees
GB3728-91
Use the density determination method (Weihe balance method) specified in GB/T12717. Allowable difference: Take the arithmetic mean of the two test results as the test result, and the difference between the two parallel test results shall not be greater than 0. 000 5 g/cm*.
4.3 Determination of the total amount of acetic acid and ethyl ketone
Use the gas chromatography method specified in GB/T12717. 4.4 Moisture
Use the gas chromatography method specified in GB/T12717. 4.5 Acidity
Use the acidity determination method specified in GB/T12717. Allowable difference: Take the arithmetic mean of the two determination results as the test result. The difference between the two parallel test results shall not be greater than 0.001%. 4.6 Evaporation residuebZxz.net
Use the evaporation residue determination method specified in GB/T12717. 5 Inspection rules
5.1 This product shall be inspected by the quality inspection department of the manufacturer. The manufacturer shall ensure that all indicators of the factory products meet the requirements of this standard and attach a quality certificate in a certain format.
5.2 Product sampling shall be carried out in accordance with the provisions of GB6680. Use a clean and dry glass sampling tube to take a uniform sample from each barrel, with a total volume of not less than 1000ml. Collect it in a clean and dry ground-mouth bottle, mix it, and put it in two clean and dry ground-mouth bottles respectively. One bottle is inspected, and the bottle is sealed and kept for inspection. Label the bottle with the name of the manufacturer, product name, batch number, specification, sampling date, and mixer. 5.3 If one indicator in the inspection result does not meet the requirements of this standard, it should be re-sampled from twice the amount of packaging containers for re-inspection. If the result is still unqualified, the entire batch of products cannot be accepted. 5.4 The receiving unit has the right to accept the product in accordance with the provisions of this standard (valid for three months from the date of leaving the factory). 5.5 Evaporation residue is a quality assurance indicator. During normal production, the manufacturer will conduct random inspections every half month. 6 Marking, packaging, transportation and storage
6.1 Marking The packaging container should be firmly marked with the manufacturer's name, batch number, product name, gross weight, net weight, production date, standard number and the "flammable liquid" mark in GB190. 6.2 Packaging The product should be packed in a clean, dry and firm iron barrel. The barrel mouth should be sealed with a seal. The net weight of each barrel is 160kg. 6.3 Transportation. During transportation and loading and unloading, it must be carried out in accordance with the regulations on the transportation of dangerous goods. Lift and place gently to avoid accidents caused by breakage. 6.4 Storage Ethyl acetate should be stored in a cool, ventilated and dry place. Additional remarks:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of the Beijing Institute of Chemical Industry of the Ministry of Chemical Industry. This standard was drafted by Beijing Chemical Industry.
This standard is composed of Wang Yaoqi, Wen Yuju, Jia Wenlan and Zhao Tongsheng. The technical indicators of this standard refer to the Soviet national standard 10XXT898178 (85) Technical specifications for industrial ethyl acetate and butyl acetate).
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