ASTM D3230-2006 Standard Test Method for Salts in Crude Oil (Electrometric Method)《原油中含盐量的标准试验方法(电测法)》.pdf
《ASTM D3230-2006 Standard Test Method for Salts in Crude Oil (Electrometric Method)《原油中含盐量的标准试验方法(电测法)》.pdf》由会员分享,可在线阅读,更多相关《ASTM D3230-2006 Standard Test Method for Salts in Crude Oil (Electrometric Method)《原油中含盐量的标准试验方法(电测法)》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 3230 06An American National StandardStandard Test Method forSalts in Crude Oil (Electrometric Method)1This standard is issued under the fixed designation D 3230; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This test method covers the d
3、etermination of the ap-proximate chloride (salts) concentration in crude oil. The rangeof concentration covered is 0 to 500 mg/kg or 0 to 150 lb/1000bbl as chloride concentration/volume of crude oil.1.2 This test method measures conductivity in the crude oildue to the presence of common chlorides, s
4、uch as sodium,calcium, and magnesium. Other conductive materials may alsobe present in the crude oil.1.3 The values stated in SI units are to be regarded asstandard. Acceptable concentration units are g/m3or PTB(lb/1000 bbl).1.4 This standard does not purport to address all of thesafety concerns, if
5、 any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specificwarning statements, see 7.3, 7.4, and 7.11.2. Referenced Documents2.1 ASTM St
6、andards:2D91 Test Method for Precipitation Number of LubricatingOilsD 381 Test Method for Gum Content in Fuels by JetEvaporationD 1193 Specification for Reagent WaterD 4928 Test Methods for Water in Crude Oils by Coulom-etric Karl Fischer TitrationD 5002 Test Method for Density and Relative Density
7、ofCrude Oils by Digital Density Analyzer3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 PTBlb/1000 bbl.3.1.2 salts in crude oilcommonly, chlorides of sodium,calcium, and magnesium dissolved in crude oil. Other inor-ganic chlorides may also be present.4. Summary of Test Method4
8、.1 This test method measures the conductivity of a solutionof crude oil in a mixed alcohol solvent when subjected to anelectrical stress. This test method measures conductivity due tothe presence of inorganic chlorides, and other conductivematerial, in the crude oil. A homogenized test specimen isdi
9、ssolved in a mixed alcohol solvent and placed in a test cellconsisting of a beaker and a set of electrodes. A voltage isimpressed on the electrodes, and the resulting current flow ismeasured. The chloride (salt) content is obtained by referenceto a calibration curve of current versus chloride concen
10、trationof known mixtures. Calibration curves are based on standardsprepared to approximate the type and concentration of chlo-rides in the crude oils being tested.5. Significance and Use5.1 This test method is used to determine the approximatechloride content of crude oils, a knowledge of which isim
11、portant in deciding whether or not the crude oil needsdesalting. The efficiency of the process desalter can also beevaluated.5.2 Excessive chloride left in the crude oil frequently resultsin higher corrosion rates in refining units and also hasdetrimental effects on catalysts used in these units.5.3
12、 This test method provides a rapid and convenient meansof determining the approximate content of chlorides in crudeoil and is useful to crude oil processors.6. Apparatus6.1 The apparatus (see Annex A1) shall consist of a controlunit capable of producing and displaying several voltage levelsfor apply
13、ing stress to a set of electrodes suspended in a testbeaker containing a test solution. The apparatus shall be1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.03 on Elemental Analysis.Current edi
14、tion approved Nov. 1, 2006. Published November 2006. Originallyapproved in 1973. Last previous edition approved in 2005 as D 323005a.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume infor
15、mation, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.capable of measuring and displaying the current
16、 (mA) con-ducted through the test solution between the electrodes at eachvoltage level.NOTE 1Some apparatus are capable of measuring voltage and currentinternally and, after comparison to internal calibration curves, of display-ing the resultant concentration.6.2 Test BeakerSee Annex A1.6.3 Pipet, 1
17、0 mL (total delivery)The type of pipet that isrinsed to ensure the entire volume of the material is containedin the intended volume.6.4 Cylinders, 100 mL, stoppered.6.5 Other volumetric and graduated pipets and volumetricflasks.7. Reagents and Materials7.1 Purity of ReagentsReagent grade chemicals s
18、hall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of theAmericanChemical Society, where such specifications are available.3Other grades may be used, provided it is first ascertained thatthe reagent is of sufficiently high purity
19、 to permit its usewithout lessening the accuracy of the determination.7.2 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean reagent water as definedby Type II in Specification D 1193.7.3 Mixed Alcohol SolventMix 63 volumes of 1-butanoland 37 volumes of absolut
20、e methyl alcohol (anhydrous). Toeach litre of this mixture, add 3 mL of water. (WarningFlammable. Liquid causes eye burns. Vapor harmful. May befatal or cause blindness if swallowed or inhaled.)NOTE 2The mixed alcohol solvent is suitable for use if its conduc-tivity is less than 0.25 mA at 125 V ac.
21、 High conductivity can be due toexcess water in the solvent and can indicate that the methyl alcohol usedis not anhydrous.7.4 ASTM Precipitation Naphtha, conforming to the re-quirements of Test Method D91.(WarningExtremelyFlammable. Harmful if inhaled. Vapors may cause flash fire.)7.5 Calcium Chlori
22、de (CaCl2) Solution (10 g/L)Transfer1.006 0.01 g of CaCl2, or the equivalent weight of a hydratedsalt, into a 100-mL volumetric flask and dissolve in 25 mL ofwater. Dilute to the mark with mixed alcohol solvent.7.6 Magnesium Chloride (MgCl2) Solution (10 g/L)Transfer 1.00 6 0.01 g of MgCl2, or the e
23、quivalent weight ofa hydrated salt, into 100-mL volumetric flask and dissolve in25 mL of water. Dilute to the mark with mixed alcohol solvent.7.7 Sodium Chloride (NaCl) Solution (10 g/L)Transfer1.00 6 0.01 g of NaCl into a 100-mL volumetric flask anddissolve in 25 mL of water. Dilute to the mark wit
24、h mixedalcohol solvent.7.8 Oil, Refined NeutralAny refined chloride-free oil ofapproximately 20 mm2/sec (cSt) viscosity at 40C and free ofadditive.7.9 Salts, Mixed Solution (Concentrated Solution)Combine 10.0 mL of the CaCl2solution, 20.0 mL of the MgCl2solution, and 70.0 mL of the NaCl solution, an
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD32302006STANDARDTESTMETHODFORSALTSINCRUDEOILELECTROMETRICMETHOD 原油 中含盐量 标准 试验 方法 电测法 PDF

链接地址:http://www.mydoc123.com/p-514343.html