UOP 379-1981 HYDROGEN FLUORIDE IN HF ALKYLATION REGENERATOR BOTTOMS.pdf
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1、 COPYRIGHT 1981 UOP LLCALL RIGHTS RESERVEDUOP Methods are available through ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken PA 19428-2959,United States. The Methods may be obtained through the ASTM website, www.astm.org, or by contacting Customer Service atserviceastm.org,
2、610.832.9555 FAX, or 610.832.9585 PHONE.HYDROGEN FLUORIDE IN HFALKYLATION REGENERATOR BOTTOMSUOP Method 379-81SCOPEThis method is for determining hydrogen fluoride (HF) in HF alkylation regenerator bottoms. Thebottoms material can be either a single or 2-phase system; the upper phase in a 2-phase sy
3、stem is rich inorganic material and contains little HF, while the lower phase is rich in HF. The lower phase may containlarge concentrations of water when there is appreciable water present in any of the feed streams. Thismethod is applicable to both types of samples.OUTLINE OF METHODThe sample is w
4、eighed into a polyethylene bottle, diluted with water, extracted with isooctane, and analiquot of the aqueous phase is titrated with standard sodium hydroxide, using phenolphthalein as theindicator.APPARATUSBalance, analytical, 2000 g capacity, capable of weighing to 0.01 g, Mettler PC 8000, availab
5、le fromSargent-Welch Scientific Co., or equivalentBeaker, polyethylene, 250-mLBottles, polyethylene, with screw caps, 500- and 1000-mLBuret, 50-mL, with Teflon stopcock, 0.1-mL subdivisionsPipet, polyethylene, 10-mLPipet, polypropylene, 100-mL, Bel-Art Products, Cat. No. H37906, or equivalentStirrer
6、, magnetic, with Teflon-covered stirring barIT IS THE USERS RESPONSIBILITY TO ESTABLISH APPROPRIATE PRECAUTIONARY PRACTICES AND TODETERMINE THE APPLICABILITY OF REGULATORY LIMITATIONS PRIOR TO USE. EFFECTIVE HEALTH ANDSAFETY PRACTICES ARE TO BE FOLLOWED WHEN UTILIZING THIS PROCEDURE. FAILURE TO UTIL
7、IZE THISPROCEDURE IN THE MANNER PRESCRIBED HEREIN CAN BE HAZARDOUS. MATERIAL SAFETY DATA SHEETS(MSDS) OR EXPERIMENTAL MATERIAL SAFETY DATA SHEETS (EMSDS) FOR ALL OF THE MATERIALS USED INTHIS PROCEDURE SHOULD BE REVIEWED FOR SELECTION OF THE APPROPRIATE PERSONAL PROTECTIONEQUIPMENT (PPE).2 of 3379-81
8、REAGENTSAll reagents shall conform to the specifications established by the Committee on Analytical Reagents ofthe American Chemical Society, when such specifications exist, unless otherwise specified. References towater mean deionized or distilled water. Unqualified references to solutions mean aqu
9、eous solutions.Isooctane, ASTM gradePhenolphthalein, 1% solution. Dissolve 0.5 g of phenolphthalein in 50 g of ethyl alcohol.Sodium hydroxide, 1 M, standardized with potassium hydrogen phthalate to 4 significant figures. Store ina polyethylene bottle.PROCEDUREBefore this analysis is started, put on
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