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GB/T 6818-2019: Octanol (2-ethyl hexanol) for industrial use Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 6818: Historical versions
GB/T 6818-2019: Octanol (2-ethyl hexanol) for industrial use---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6818-2019GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.080.60 G 17 Replacing GB/T 6818-1993 Octanol (2-ethylhexanol) for industrial use Issued on. JUNE 04, 2019 Implemented on. MAY 01, 2020 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Technical requirements... 5 4 Test methods... 5 5 Inspection rules... 13 6 Marks and accompanying documents... 14 7 Packaging, transportation and storage... 15 Annex A (Normative) Typical chromatogram for the determination of 2- ethylhexanol and impurities, and the relative retention value and relative mass correction factor of each component... 16 Annex B (Informative) Safety... 18ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 6818-1993 "2-Ethyl hexanol for industrial use". Compared with GB/T 6818-1993, in addition to the editorial modifications, the main technical changes are as follows. - revise the indicator of "2-ethylhexanol" 99.5% to 99.6%; add technical requirements for "2-ethyl-4-methylpentanol" (see Table 1 of this Edition, 3.2 of Edition 1993); - modify the determination method for the density of 2-ethylhexanol (see 4.3 of this Edition, 4.2 of Edition 1993); - modify the test method for 2-ethylhexanol; add the test method for 2-ethyl- 4-methylpentanol (see 4.4 of this Edition, 4.3 of Edition 1993); - add Carl-Fischer coulometric method for determining moisture (see 4.8 of this Edition). This Standard was proposed by China Petroleum and Chemical Industry Federation. This Standard shall be under the jurisdiction of Subcommittee on Organic Chemicals of National Technical Committee on Chemicals of Standardization Administration of China (SAC/TC 63/SC 2). The drafting organizations of this Standard. Nanjing Chengzhi Clean Energy Co., Ltd., Anqing Refinery and Chemical Suguang Butanol Chemical Co., Ltd., Tianjin Bohua Yongli Chemical Co., Ltd., Shandong Jianlan Chemical Co., Ltd., Sinopec Nanjing Chemical Research Institute Co., Ltd., Luxi Chemical Group Co., Ltd., China Petroleum & Chemical Corporation Qilu Branch Second Fertilizer Plant, PetroChina Jilin Petrochemical Branch, China Petroleum & Chemical Corporation Beijing Research Institute of Chemical Industry. Main drafters of this Standard. Gao Xianhu, Sun Xueling, Wang Shuqin, Cheng Nigen, Pang Shuanlin, Geng Yipei, Wang Lin, Hu Chonglan, Sun Yuxia, Pang Yuna, Chen Jun, Wang Haiquan, Zhu Xiaolin, Huang Yu. Versions of standard substituted by this Standard are. - GB/T 6818-1986, GB/T 6818-1993. Octanol (2-ethylhexanol) for industrial use1 ScopeThis Standard specifies technical requirements, test methods, inspection rules, marks and accompanying documents, packaging, transportation and storage for octanol (2-ethylhexanol) for industrial use. This Standard is applicable to octanol (2-ethylhexanol) for industrial use prepared by propylene oxo synthesis method and acetaldehyde condensation method. Molecular formula. C8H18O Relative molecular mass. 130.23 (according to 2016 international relative atomic mass)2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 601, Chemical reagent - Preparations of standard volumetric solutions GB/T 603, Chemical reagent - Preparations of reagent solutions for use in test methods GB/T 2013, Standard test method for density of liquid petrochemical products GB/T 3143, Color determination method of liquid chemicals (Hazen unit - Platinum-cobalt scale) GB/T 6283, Chemical products - Determination of water Karl-Fischer method (general method)3 Technical requirements3.1 Appearance. Transparent liquid, no suspended matter. 3.2 The technical requirements for industrial octanol (2-ethylhexanol) shall meet the requirements of Table 1.4 Test methodsWARNING - Some procedures specified in the test method may lead to dangerous situations. The operator shall take appropriate safety and protective measures. 4.1 General The reagents and water used in this Standard, when other requirements are not specified, refer to analytically-pure reagents and grade three water that meets the requirements of GB/T 6682. 4.2 Determination of chromaticity According to GB/T 3143. 4.3 Determination of density According to GB/T 2013.The temperature correction coefficient K value of the sample density is 0.00073 g/(cm3·°C). 4.4 Determination of mass fraction of 2-ethylhexanol and 2-ethyl-4- methylpentanol 4.4.1 Principle Inject an appropriate amount of specimen into the gas chromatograph. 2- Ethylhexanol and impurities are effectively separated on a capillary column. Use a hydrogen flame ionization detector (FID) to measure the peak area of each component. Use the corrected area normalization method to calculate the concentration of each component. After deducting the water, calculate the content of 2-ethylhexanol, 2-ethyl-4-methylpentanol and other impurities. 4.4.2 Reagents and materials 4.4.3 Instruments 4.4.3.1 Gas chromatograph. Equipped with hydrogen flame ionization detector (FID) and sample injection shunt device. The sensitivity and stability of the whole machine comply with the relevant regulations in GB/T 9722.The linear range of the instrument shall meet the requirements of quantitative analysis. 4.4.3.2 Recorder. Chromatographic data workstation. 4.4.4 Analysis steps 4.4.4.1 Determination of relative mass correction factor 4.4.4.2 Determination of sample Start the gas chromatograph. Debug the instrument according to the chromatographic operating conditions listed in Table 2.Analyze the specimen after the baseline is stable. Use corrected area normalization method to quantify. Calculate the content of each component. The correction factors for other unknown peaks are calculated based on 2-ethyl-4-methylpentanol. 4.4.5 Result calculation The mass fraction w1 of 2-ethylhexanol and the mass fraction w2 of 2-ethyl-4- methylpentanol are calculated according to formula (2). 4.5 Determination of acid content (in terms of acetic acid) 4.5.1 Principle In ethanol medium, phenolphthalein is used as indicator, and sodium hydroxide standard titration solution is used for neutralization and titration. 4.5.2 Reagents 4.5.2.1 Ethanol. 95% (volume fraction). 4.5.2.2 Sodium hydroxide standard titration solution. c(NaOH)=0.05mol/L. 4.5.2.3 Phenolphthalein indicator solution. 10g/L. 4.5.3 Instruments Burette. 10mL; division value is 0.05mL. 4.6 Determination of the mass fraction of carbonyl compounds 4.6.1 Principle The carbonyl compound in the sample reacts with hydroxylamine hydrochloride to form an oxime. At the same time, it releases hydrochloric acid of the same amount. Use potassium hydroxide ethanol standard titration solution to conduct potentiometric titration for free hydrochloric acid. 4.6.2 Reagents 4.6.2.1 Absolute ethanol. 4.7 Sulfuric acid color test 4.7.1 Principle Under certain conditions, use sulfuric acid to process the specimen. Compare the color produced by the specimen with the same volume chromaticity standard. 4.7.2 Reagents Sulfuric acid. Guaranteed reagent. 4.7.3 Test steps Use sulfuric acid solution to clean the used instruments. Then use tap water and distilled water rinse and dry. 4.8 Determination of moisture content 4.8.1 Carl-Fischer direct coulometric titration (arbitration law) Measure according to GB/T 6283.Measure the volume of the specimen to 10.0mL or take an appropriate volume according to the moisture content in the specimen.5 Inspection rules5.1 Octanol for industrial use shall be inspected by the quality inspection department of the manufacturer. Type inspection items are appearance and all inspection items specified in Table 1, of which appearance, color, density, 2- ethylhexanol, acid content, sulfuric acid color test, moisture, 2-ethyl-4- methylpentanol are items of the exit-factory inspection. Under normal circumstances, the type inspection shall be carried out at least once every 3 months. The type inspection should be conducted in one of the following cases. 5.3 The inspection result shall be judged according to the rounding value comparison method stipulated in GB/T 8170 whether it meets this Standard. If an indicator of the test result does not meet the requirements of this Standard, the sampling shall be doubled for re-inspection. Even if one indicator does not meet the requirements of this Standard in the re-inspection result, the whole batch of products is nonconforming.6 Marks and accompanying documents6.1 The packaging containers for octanol for industrial use shall have strong and clear marks 1, including.7 Packaging, transportation and storage7.1 Packaging Octanol for industrial use shall be packaged in a dry, clean tanker or other packaging that meets the requirements. 7.2 Transportation The transportation of octanol for industrial use shall comply with the relevant regulations on the transportation of hazardous chemicals. It shall be handled with care, to avoid collision. Prevent rain and sun. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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