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原油及其油品中氯含量的测定

跟着原油的日趋残次化,氯腐蚀问题受到越来越多炼油企业的重视。在原油加工进程中,由于原油中氯化物的分化等原因,可能生成氯化氢气体,形成加工设备腐蚀及导致催化剂中毒;当必定程度的氯与氨氮元素结合,生成氯化铵堆积,对炼厂出产和设备形成很大的负面影响,

严重威胁炼油设备的完整性和炼厂的安全运行。

研讨炼油工艺中氯的腐蚀及相关防腐技术,首先需求搞清楚原油中氯化物的来源、存在办法及在工艺进程中的改变规律,最根底的工作是要树立总氯、有机氯和无机氯的定量剖析办法,精确测定原油及其在加工进程中氯含量的数据,依据这些氯含量数据及改变规律,寻求解决原油加工进程氯腐蚀的途径。

原油中的氯可分为有机氯和无机氯,有机氯首要来自原油自身的胶质、沥青质,及挖掘加工进程添加的堵水剂、脱盐剂、破乳剂等化学助剂;无机氯首要以NaCI 、CaCl2、MgCl2 的办法存在于原油中。因防腐研讨和出产需求,一般需别离测定原油中的无机氯和有机氯的含量。

原油加工进程的电脱盐设备能够有效脱除原油的无机氯,对有机氯没有作用,而有机氯在必定的条件下会发生热裂解和水解反响,生成气体HCi3,从而形成设备的氯腐蚀。

迄今为止,国内外尚无公认的用于测定原油或馏分油中总氯含量的标准剖析办法,因而原油及其油品中氯含量(有机氯、无机氯)的办法,存在着必定的争议与缺陷。

原油及其油品中总氯含量剖析办法

传统的办法有氧瓶燃烧法和氧弹燃烧法、方便的X射线荧光法等,但这些办法只适用于氯含量较高的润滑油、添加剂类样品的测定。常用的非标准办法首要有氧化微库仑法和联苯基钠还原法两大类。

氧化微库仑法的首要原理是将试样在高温、富氧条件下,进行氧化裂解反响,使氯元索转化为HCI,通过载气将 HCI推入微库仑滴定池,滴定剂Ag与 CI-发生沉淀反响,耗费的Ag通过电解办法进行弥补,丈量弥补 Ag所耗费的电量,依据法拉第规律及进样量,核算得到样品的总氯含量。

联苯基钠还原法是将试样溶解于甲苯中,参加联苯基钠试剂,将有机氯转化为NaCl:用异丙醇分化剩余的联苯基钠;再用酸性水溶液进行抽提,别离出水相后,进行 CIT定量剖析。依据CI-定量剖析办法的不同,可划分为容量滴定法和电位滴定法。

以上两种办法,联苯基钠还原法需求参加甲苯等有毒试剂,对人体的健康形成必定程度的伤害,同时,联苯基钠还原法适用于较轻的馏分油,不适合原油的测定,因为原油的粘度大、颜色深,不利于有机氯转化反响及后续萃取操作,并且还会影响滴定结尾的判断,同时,该办法操作进程较复杂、剖析速度较慢:而氧化微库伦法,试剂仅运用70% 的醋酸,灵敏度较高,因为操作简单所以引进的差错相对较小,可是需求很好的操控反响条件,只要确保无机氯悉数转化为HCl,总氯含量的测定成果才精确。

原油及其油品中无机氯剖析办法

选用SY/T0536-2008原油盐含量测定法(电量法)能够得到原油中的无机氯含量,本办法适用于测定原油、重油、油田及炼厂水中浓度 0.2~10000mgNaCI/L的盐含量。将原油用二甲苯稀释后,用醇水溶液萃取其所含的盐类,经过离心别离,取适量萃取液,注入到含必定量银离子的乙酸电解液中,银离子与氯离子发生反响:

Ag”+CIT →AgCI,反响耗费的银离子由发生电极发生弥补,使用微库仑仪丈量银离子耗费的电量,再依据法拉第电解规律求得原油中无机氯含量。

原油及其油品中有机氯含量剖析办法

原油中的有机氯的测定,选用GB/T18612-2011办法,先用常压蒸馏办法( ASTMD86)进行原油切割,得到204℃前馏分油,再进行碱洗和水洗脱除其中的硫化氢和无机氯,最后用氧化微库仑法或联苯基钠还原法测定氯含量;依据 204℃前馏分油中有机氯含量及该馏分段的收率核算得到原油中有机氯含量。运用该办法操作复杂,耗时间长,并且,只将原油蒸馏得到的204 ℃前馏分油的有机氯含量作为悉数原油的有机氯含量,部分替代悉数不合理同。

除此之外,还能够使用原油中总氯与无机氯含量的测定成果,差减核算得到原油有机氯含量。

综上所述,原油及其油品中的总氯含量可用微库仑法测定,然后用醇水溶液萃取无机氯,用电位法测定无机氯含量,总氯含量减去无机氯含量即可得到有机氯含量。

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订货编号:M-8121,标样名称:Chlorinated Hydrocarbons by GC,1000 µg/mL in Hexane:Acetone (97:03),22个组分,1mL
订货编号:M-8085-C1,标样名称:Chlorinated Pesticide Mix # 1,2.5 µg/mL in Hexane,23个组分,5mL
订货编号:M-CHP-1-PAK,标样名称:Chlorinated Hydrocarbon Pesticides – Mix 1,Varied conc. in Acetone,6个组分,5 x 1mL
订货编号:M-CHP-1,标样名称:Chlorinated Hydrocarbon Pesticides Mix 1,Varied conc. in Acetone,6个组分,1mL
订货编号:M-CHP-2-PAK,标样名称:Chlorinated Hydrocarbon Pesticides – Mix 2,Varied conc. in Acetone,6个组分,5 x 1mL
订货编号:M-CHP-2,标样名称:Chlorinated Hydrocarbon Pesticides – Mix 2,Varied conc. in Acetone,6个组分,1mL
订货编号:MISA-NC,标样名称:Group 23 – Extractables, Neutral Chlorinated,2.0mg/mL in CH2Cl2,12个组分,1mL
订货编号:M-615A-ASL-PAK,标样名称:Method 615 Underivatized Chlorinated Herbicides,Varied conc. in MeOH,10个组分,5 x 1mL
订货编号:M-615A-ASL,标样名称:Method 615 Underivatized Chlorinated Herbicides,Varied conc. in MeOH,10个组分,1mL
订货编号:M-8150,标样名称:Methyl Derivatives of Chlorinated Herbicides,Varied conc. in Methanol,10个组分,1mL
订货编号:M-515-R-PAK,标样名称:Methyl Deriv. of Chlorinated Acids,1000 µg/mL in MtBE,16个组分,5 x 1mL
订货编号:M-515-R,标样名称:Methyl Deriv. of Chlorinated Acids,1000 µg/mL in MtBE,16个组分,1mL
订货编号:M-617-2,标样名称:Method 617 – Chlorinated Pesticides – Mix 2,2.0mg/mL in Hexane:Toluene (50:50),9个组分,1mL
订货编号:CCME-CDW-CPEST,标样名称:Canadian Drinking Water Chlorinated Pesticide Mix,200 µg/mL in Hexane:Toluene,14个组分,1mL
订货编号:M-8270-02-ASL,标样名称:Method 8270B – Chlorinated Hydrocarbons Mix,2.0mg/mL in CH2Cl2,13个组分,1mL
订货编号:M-8321-HERB,标样名称:Chlorinated Phenoxyacid Herbicides (as acids & esters),0.1 mg/mL in Acetonitrile,14个组分,1mL
订货编号:M-8151,标样名称:Chlorinated Herbicides Methyl Derivatives by GC,Varied conc. in MtBE,18个组分,1mL
订货编号:M-508P-B-R-PAK,标样名称:Method 508 – Chlorinated Pesticides by GC/ECD,1000 µg/mL in MtBE,13个组分,5 x 1mL
订货编号:M-508P-B-R,标样名称:Method 508 – Chlorinated Pesticides by GC/ECD,1000 µg/mL in MtBE,13个组分,1mL
订货编号:M-508P-B-R2-PAK,标样名称:Method 508 – Chlorinated Pesticides by GC/ECD,1000 µg/mL in MtBE,15个组分,5 x 1mL
订货编号:M-508P-B-R2,标样名称:Method 508 – Chlorinated Pesticides by GC/ECD,1000 µg/mL in MtBE,15个组分,1mL
订货编号:M-615-ASL-PAK,标样名称:Method 615 Methyl Derivatives of Chlorinated Herbicides,Varied conc. in Methanol,10个组分,5 x 1mL
订货编号:M-615-ASL,标样名称:Method 615 Methyl Derivatives of Chlorinated Herbicides,Varied conc. in Methanol,10个组分,1mL
订货编号:M-508P-A-PAK,标样名称:Method 508 – Chlorinated Pesticides by GC/ECD,1000 µg/mL in MtBE,17个组分,5 x 1mL
订货编号:M-508P-A,标样名称:Method 508 – Chlorinated Pesticides by GC/ECD,1000 µg/mL in MtBE,17个组分,1mL
订货编号:WC-AOX-2X-1,标样名称:停产另见编号:WC-AOX-2X-20ML-VAP; (was Absorbable Organic Halogens),200 µg/mL in Water,单组分,100mL

订货编号:SK-1X-20ML,Sulfur Standard,Sulfur, 100 µg/g in Kerosene,单一组分,20mL
订货编号:SK-10X-20ML,Sulfur Standard,Sulfur, 1000 µg/g in Kerosene,单一组分,20mL
订货编号:SDF-600X-20ML,Sulfur Standard,Sulfur, 60000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-5X-20ML,Sulfur Standard,Sulfur, 500 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-50X-20ML,Sulfur Standard,Sulfur, 5000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-500X-20ML,Sulfur Standard,Sulfur, 50000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-3X-20ML,Sulfur Standard,Sulfur, 300 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-30X-20ML,Sulfur Standard,Sulfur, 3000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-2X-20ML,Sulfur Standard,Sulfur, 200 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-1X-20ML,Sulfur Standard,Sulfur, 100 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-10X-20ML,Sulfur Standard,Sulfur, 1000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SK-5X-20ML,Sulfur Standard,500 µg/g in Kerosene,单一组分,20mL
订货编号:SK-50X-20ML,Sulfur Standard,5000 µg/g in Kerosene,单一组分,20mL
订货编号:SK-3X-20ML,Sulfur Standard,300 µg/g in Kerosene,单一组分,20mL
订货编号:ASTM-P-0020,Sulfur Standard,Sulfur, 1000 µg/mL in Xylenes,单一组分,1 mL
订货编号:SDF-70X-20ML,Sulfur Standard,7000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-4X-20ML,Sulfur Standard,400 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-400X-20ML,Sulfur Standard,40000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-300X-20ML,Sulfur Standard,30000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-200X-20ML,Sulfur Standard,20000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-15X-20ML,Sulfur Standard,1500 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-150X-20ML,Sulfur Standard,15000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-100X-20ML,Sulfur Standard,10000 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:SDF-7.5X-20ML,Sulfur Standard,750 µg/g in #2 Diesel fuel,单一组分,20mL
订货编号:ASTM-P-0010,Sulfur Standard,Sulfur, 1000 µg/mL in Toluene,单一组分,1mL
订货编号:SK-40X-20ML,Sulfur Standard,4000 µg/g in Kerosene,单一组分,20mL
订货编号:SK-30X-20ML,Sulfur Standard,3000 µg/g in Kerosene,单一组分,20mL
订货编号:SK-20X-20ML,Sulfur Standard,2000 µg/g in Kerosene,单一组分,20mL
订货编号:SK-200X-20ML,Sulfur Standard,20000 µg/g in Kerosene,单一组分,20mL
订货编号:SK-100X-20ML,Sulfur Standard,Sulfur, 10000 µg/g in Kerosene,单一组分,20mL
订货编号:SK-7.5X-20ML,Sulfur Standard,750 µg/g in Kerosene,单一组分,20mL
订货编号:D-3120-92-75X,Sulfur Standard,75.0 µg/g in Isooctane,单一组分,1mL
订货编号:D-3120-92-50X,Sulfur Standard,50.0 µg/g in Isooctane,单一组分,1mL
订货编号:D-3120-92-3X,Sulfur Standard,3.0 µg/g in Isooctane,单一组分,1mL
订货编号:D-3120-92-30X,Sulfur Standard,30.0 µg/g in Isooctane,单一组分,1mL
订货编号:D-3120-92-1X,Sulfur Standard,1.0 µg/g in Isooctane,单一组分,1mL
订货编号:D-3120-92-10X,Sulfur Standard,10.0 µg/g in Isooctane,单一组分,1mL
订货编号:D-3120-92-100X,Sulfur Standard,100.0 µg/g in Isooctane,单一组分,1mL
订货编号:ASTM-SSTDB-07,Sulfur Calibration Mix,50.0 mg/Kg in Isooctane,单一组分,2mL
订货编号:ASTM-SSTDB-06,Sulfur Calibration Mix,25.0 mg/Kg in Isooctane,单一组分,2mL
订货编号:ASTM-SSTDB-05,Sulfur Calibration Mix,10.0 mg/Kg in isooctane,单一组分,2mL
订货编号:ASTM-SSTDB-04,Sulfur Calibration Mix,5.0 mg/Kg in Isooctane,单一组分,2mL
订货编号:ASTM-SSTDA-04,Sulfur Calibration Standard,5.0 µg/g in Isooctane,单一组分,2mL
订货编号:ASTM-SSTDA-03,Sulfur Calibration Standard,2.5 µg/g in Isooctane,单一组分,2mL
订货编号:ASTM-SSTDA-02,Sulfur Calibration Standard,1.0 µg/g in Isooctane,单一组分,2mL
订货编号:ASTM-SSTDA-01,Sulfur Calibration Standard,0.5 µg/g in Isooctane,单一组分,2mL
订货编号:ASTM-P-0020-PAK,Sulfur Standard,Sulfur, 1000 µg/mL in Xylenes,单一组分,5 x 1mL
订货编号:ASTM-P-0010-PAK,Sulfur Standard,Sulfur, 1000 µg/mL in Toluene,单一组分,5 x 1mL
订货编号:STP-60X-100ML,Sulfur Standard,600.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-5X-100ML,Sulfur Standard,50.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-40X-100ML,Sulfur Standard,400.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-3X-100ML,Sulfur Standard,30.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-30X-100ML,Sulfur Standard,300.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-300X-100ML,Sulfur Standard,3000.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-2X-100ML,Sulfur Standard,20.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-200X-100ML,Sulfur Standard,2000.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-1X-100ML,Sulfur Standard,10.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-10X-100ML,Sulfur Standard,100.0 µg/g in Isooctane,单一组分,100mL
订货编号:STP-100X-100ML,Sulfur Standard,1000.0 µg/g in Isooctane,单一组分,100mL
订货编号:SDF-600X-20ML-PAK,Sulfur Standard,Sulfur, 60000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-5X-20ML-PAK,Sulfur Standard,Sulfur, 500 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-50X-20ML-PAK,Sulfur Standard,Sulfur, 5000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-500X-20ML-PAK,Sulfur Standard,Sulfur, 50000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-3X-20ML-PAK,Sulfur Standard,Sulfur, 300 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-30X-20ML-PAK,Sulfur Standard,Sulfur, 3000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-2X-20ML-PAK,Sulfur Standard,Sulfur, 200 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-1X-20ML-PAK,Sulfur Standard,Sulfur, 100 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-10X-20ML-PAK,Sulfur Standard,Sulfur, 1000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:STP-20X-100ML,Sulfur Standard,200.0 µg/g in Isooctane,单一组分,100mL
订货编号:SRO-70X-100ML,Sulfur Standard,7000 µg/g in Residual oil,单一组分,100mL
订货编号:SRO-400X-100ML,Sulfur Standard,40000 µg/g in Residual oil,单一组分,100mL
订货编号:SRO-35X-100ML,Sulfur Standard,3500 µg/g in Residual oil,单一组分,100mL
订货编号:SRO-300X-100ML,Sulfur Standard,30000 µg/g in Residual oil,单一组分,100mL
订货编号:SRO-200X-100ML,Sulfur Standard,20000 µg/g in Residual oil,单一组分,100mL
订货编号:SRO-150X-100ML,Sulfur Standard,15000 µg/g in Residual oil,单一组分,100mL
订货编号:SK-1X-20ML-PAK,Sulfur Standard,Sulfur, 100 µg/g in Kerosene,单一组分,5x20mL
订货编号:SK-10X-20ML-PAK,Sulfur Standard,Sulfur, 1000 µg/g in Kerosene,单一组分,5x20mL
订货编号:SK-100X-20ML-PAK,Sulfur Standard,Sulfur, 10000 µg/g in Kerosene,单一组分,5x20mL
订货编号:SRO-100X-100ML,Sulfur Standard,10000 µg/g in Residual oil,单一组分,100mL
订货编号:SDF-70X-20ML-PAK,Sulfur Standard,7000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-70X-100ML,Sulfur Standard,7000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-7.5X-100ML,Sulfur Standard,750 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-600X-100ML,Sulfur Standard,60000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-5X-100ML,Sulfur Standard,500 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-50X-100ML,Sulfur Standard,5000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-500X-100ML,Sulfur Standard,50000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-4X-20ML-PAK,Sulfur Standard,400 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-4X-100ML,Sulfur Standard,400 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-400X-20ML-PAK,Sulfur Standard,40000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-400X-100ML,Sulfur Standard,40000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-3X-100ML,Sulfur Standard,300 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-30X-100ML,Sulfur Standard,3000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-300X-20ML-PAK,Sulfur Standard,30000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-300X-100ML,Sulfur Standard,30000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-2X-100ML,Sulfur Standard,200 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-200X-20ML-PAK,Sulfur Standard,20000 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-200X-100ML,Sulfur Standard,20000 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-1X-100ML,Sulfur Standard,100 µg/g in #2 Diesel fuel,单一组分,100mL
订货编号:SDF-15X-20ML-PAK,Sulfur Standard,1500 µg/g in #2 Diesel fuel,单一组分,5x20mL
订货编号:SDF-15X-100ML,Sulfur Standard,1500 µg/g in #2 Diesel fuel,单一组分,100mL