CN102519894B - Ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer - Google Patents
Ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer Download PDFInfo
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Abstract
The invention relates to a ferric ion stabilizing capability measurement method of an acidification ferric ion stabilizer, which comprises the steps that: excess standard ferric ion solution is added into a certain amount of ferric ion stabilizer, so complex reaction is generated between all the ferric ion stabilizer and the standard ferric ion solution, then the pH is adjusted to between 5-6, the redundant Fe<3+> is hydrolyzed to generate the Fe(OH)3 flocculent precipitate, the precipitate is removed through centrifugation, all the supernatant is collected, and in the acid medium, a sulfosalicylic acid spectrophotometric method is utilized to test the total ferric content which is stabilized by the ferric ion stabilizer. The invention has the following advantages that: 1, the adopted method is simple and quick to operate, and has good repeatability and high precision; 2, the problems of multiple repeated heating, repeated diluting, finish determination and the like of the liquid do not exist in the adopted method, and the personal factor is prevented from influencing the test result; and 3, the test precision of the ferric ion content is high, and the test of the ferric ion is benefited.
Description
Technical field
The present invention relates to a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer, belong to petrochemical industry.
Background technology
In oil-water well acidizing treatment process, the acid solution of high concentration can dissolve the iron compound of pipeline and equipment surface in stirring and pumping procedure, enter iron mineral and the clay mineral that can corrode again behind the stratum in the rock, although used corrosion inhibiter, also can corrosion part iron.These dissolved irons in solution generally with Fe
2+And Fe
3+State exists.Along with the sustained response of acid solution and formation rock, the effective concentration of acid solution lowers gradually, and the pH value raises.When acid solution pH value rises to 2.2 (Fe
3+Concentration be 0.01mol/L) time, just begin to produce Fe (OH)
3Precipitation; When acid solution pH value continues to rise to 3.2, the Fe of all dissolvings
3+Precipitation fully; When acid solution pH value continues to rise to 7.7, Fe
2+Can produce equally Fe (OH)
2Precipitation, but because the pH value of acid solution all less than 6, so is not considered Fe (OH) in the acidizing treatment
2Precipitation.Fe (OH)
3Precipitate once formation, just may stop up formation pore and oil gas infiltration lane, and then reduce acidification effect and oil gas production capacity.In order to prevent that acid solution from becoming residual when acid and producing the iron precipitation, in Acidizing Technology, often adopt in acid solution and to add Fe stabilizer and prevent that acid solution from generating gelatinous ferric hydroxide precipitate when becoming residual acid, prevent it to the infringement of hydrocarbon zone, thereby improve the acidification effect.
For Fe stabilizer, stablizing the ferric ion ability is one of its Key Performance Indicator.What present domestic employing was maximum is oil and gas industry standard-acidifying Fe stabilizer method of evaluating performance (SY/T6571-2003).This method is after the Fe stabilizer sample mixed with the iron standard solution of concentration known and certain volume, pH value with the sodium carbonate regulating solution of certain mass concentration, then mixed solution heating is observed, measured solution is become little adding when some before muddy by clarification iron (Fe
3+) the total consumption of standard solution.This method has that the measurement result accuracy is high, high repeatability and other advantages when stablizing the lower Fe stabilizer of ferric ion ability measuring, yet, measuring when stablizing the higher Fe stabilizer of ferric ion ability, have repeatedly adjust pH, repeatedly Repeat-heating, solution repeat dilution, evaluation of end point such as is affected by human factors at the phenomenon, operate tediously long complexity, be unfavorable for the objective evaluation of Fe stabilizer.
In addition, measuring Fe stabilizer, to stablize the method for ferric ion ability more, mainly comprises compleximetry, EDTA back titration, Fe (OH)
3The precipitation method and iodimetric titration etc.Compleximetry is under acid condition, makes indicator with sulfosalicylic acid, uses Fe
3+Standard solution titration Fe stabilizer sample solution utilizes Fe
3+Generate the blush complex with sulfosalicylic acid and judge titration end-point.The advantage of compleximetry be simple to operate, quick, the titration end-point hop is obvious, precision is high; Shortcoming is that measurement result is less than normal.The EDTA back titration is under acid condition, adds excessive ammonium ferric sulfate solution in the Fe stabilizer of known quality, makes all Fe stabilizeies all react remaining Fe with ferric ion
3+With the titration of EDTA standard solution, solution becomes glassy yellow by aubergine and is titration end-point.Its advantage is relatively high for measuring stationary value; Shortcoming is that the terminal point hop is not obvious, is difficult for observing, and error is larger, is subject to sometimes color sample and disturbs.Fe (OH)
3The precipitation method are under strong alkaline condition, use Fe
3+Standard solution titration Fe stabilizer sample solution Fe (OH) occurs to solution
3Flocculent deposit is titration end-point.Fe (OH)
3The shortcoming of the precipitation method is that titration end-point is difficult for observing, and error is larger, and is subject to the impact of sample intrinsic colour.Iodimetric titration is to add excessive ammonium ferric sulfate solution in a certain amount of Fe stabilizer, stablizes a certain amount of ferric ion, then to remaining Fe
3+Add excessive KI in the solution and generate iodine (2Fe
3++ 2I
-→ 2Fe
2++ I
2), with starch as indicator Na
2S
2O
3The solution titration.Its advantage is that the titration end-point hop is obvious, and the replicate determination relative error is less; Shortcoming is that method error is too large, because I-easily is oxidised with air to I under acid condition
2, product Fe
2+Also easily be oxidised with air to Fe
3+, Fe
3+Continue oxidation I-etc., cause measurement result all on the low side, and measurement result is subjected to affect also larger standing time.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned technology, a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer is provided, it is easy to operate, good reproducibility, be easy to promote the use of.
Technical solution of the present invention is as follows: a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer comprises the steps:
Reagent is prepared: the concentration of standard ferric ion solution is that the concentration of 5.0mg/mL, Carbon Dioxide sodium solution is 20%, the pH value of buffer solution is 2.2, the sulfosalicylic acid solution concentration is 10%.It is pure that above reagent is analysis, and institute's water is secondary distillation water.
Step 1: in the 100mL beaker, pipette 1.0mL Fe stabilizer sample, then add 20.0mL standard ferric ion solution, stir;
Step 2: with the Carbon Dioxide sodium solution pH value of above-mentioned mixed liquor is transferred to 5～6 (accurate pH test papers), solution is heated to boiling, take off behind 5～6min and be cooled to room temperature, whether the rear observation solution that stops to seethe with excitement is clarified bright;
Step 3: if clarify brightly, continue to pipette 5.0mL standard ferric ion solution with transfer pipet, add in the above-mentioned beaker, repeating step 2 is until solution becomes turbid;
Step 4: cooled solution moved into carry out centrifugally in the 50mL centrifuge tube, supernatant liquor is poured in the 1000mL volumetric flask after centrifugal, then use at twice distilled water washing precipitation and centrifugal, collect whole supernatant liquors in volumetric flask, and with its constant volume;
Step 5: get V the solution behind constant volume
1ML solution places the 50mL color-comparison tube, adds people's buffer solution 10.0mL and sulfosalicylic acid solution 1.0mL, and shakes up behind scale with distilled water diluting, leaves standstill 20～25min;
Step 6: on spectrophotometer, take iron content as zero solution as blank, measure optical density value at wavelength 500nm place, obtain iron ion content m with reference to the iron typical curve;
Step 7: stablize Fe
3+Ability is calculated by formula (1):
In the formula: N-stablizes Fe
3+The ability of ion, g/L;
V
1The volume of-ferric ion the solution measured, mL;
M-V
1The ferric iron iron ion content that volume is corresponding, mg.
The concentration of standard ferric ion solution is that the concentration of 5.0mg/mL, Carbon Dioxide sodium solution is 20%, the pH value of buffer solution is 2.2, the concentration of sulfosalicylic acid solution is 10%.
Standard ferric ion solution is ferric chloride (FeCl36H2O) solution, and buffer solution is hydrochloric acid and potassium hydrogen phthalate solution.
The assay method of iron typical curve may further comprise the steps:
Step 1: in the 50mL color-comparison tube, add respectively people's iron standard solution 0.0,5.0,6.0,7.0,8.0,9.0,10.0mL;
Step 2: in above-mentioned color comparison tube, respectively add distilled water 15～20mL, buffer solution 10mL and sulfosalicylic acid solution 1.0mL, shake up behind scale with distilled water diluting, leave standstill 20～25min;
Step 3: on spectrophotometer, take iron content as zero solution as blank, measure optical density value at wavelength 500nm place, draw the iron typical curve according to content and the optical density value that records of iron.
Described iron standard solution is ferriammonium sulfate solution, and concentration is 0.01mg/mL.
Principle of the present invention is to add excessive standard ferric ion solution in a certain amount of Fe stabilizer, and all Fe stabilizeies are all reacted with Fe3+, and then adjust pH is 5～6 o'clock, makes unnecessary Fe
3+Generate Fe (OH)
3Flocculent deposit by the centrifugal precipitation of removing, is collected whole supernatants, in acid medium, utilizes sulfosalicylia acid spectrophotometry to measure the stable total iron content of Fe stabilizer.
Assay method of the present invention is to stablize the mensuration of ferric ion ability in Fe stabilizer method of evaluating performance (SY/T6571-2003) and basis that the sulfosalicylic acid spectrophotometric is surveyed iron processes is improved in acidifying, mainly contains following advantage:
(1) the natrium carbonicum calcinatum solution concentration is adjusted into 20% by 5%, the dosage of standard ferric ion solution is adjusted into 5.0mL by 0.5～1.0mL, when measuring when stablize the higher Fe stabilizer of ferric ion ability, avoided solution repeatedly Repeat-heating, repeat to dilute and the problems such as terminal point determining difficulty.
(2) adopt the excessive standard ferric ion solution of adding, by adjust pH non-stabilized ferric ion is all precipitated, be convenient to experimental implementation and terminal point determining, avoided the impact of human factor on test result.
(3) adopt centrifuge method to remove precipitation and use distilled water washing precipitation determination step, can realize quickly and accurately Fe stabilizer is stablized the evaluation of ferric ion ability.
(4) adopting sulfosalicylia acid spectrophotometry to measure ferric ion in the solution, is that the complex compound of generation in 1.8～2.5 o'clock is the most stable in the pH of solution value, and the iron ion content precision of mensuration is high, is conducive to the mensuration of ferric ion.
Description of drawings
Fig. 1 is at the iron content of wavelength 500nm place mensuration-absorbance typical curve.
Embodiment
Embodiment 1:
The reagent preparation
5.0mg/mL standard ferric ion solution: accurately take by weighing ferric chloride (FeCl36H2O) 6.0335g (FeCl
36H
2O) in beaker, with surely being dissolved in the 250mL volumetric flask behind the dissolved in distilled water, shake up for subsequent use;
20% Carbon Dioxide sodium solution: take by weighing the 20.0g natrium carbonicum calcinatum in thin mouthful of plastic bottle, add 80mL distilled water, shake up for subsequent use;
10% sulfosalicylic acid solution: take by weighing the 10.0g sulfosalicylic acid in thin mouthful of vial, add 90mL distilled water, shake up for subsequent use;
The buffer solution of pH=2.2: pipette the hydrochloric acid solution 230mL of 0.2mol/L and the potassium hydrogen phthalate solution 250mL of 0.2mol/L, after mixing with distilled water diluting to 1000mL;
0.01mg/mL iron standard solution: accurately take by weighing 0.8634g ferriammonium sulfate [(FeNH
4(SO
4)
212H
2O] place beaker, adding distil water to make it dissolving, add again people 5.0mL sulfuric acid, at last solution to be transferred in the 1000mL volumetric flask, and shaken up behind scale with distilled water diluting, every milliliter of this solution contains ferric iron 0.10mg; Draw mentioned solution 10.0mL and place the 100mL volumetric flask, and shake up behind scale with distilled water diluting, ferric concentration is 0.01mg/mL in this solution;
It is pure that above reagent is analysis, and institute's water is secondary distillation water.
The drafting of iron typical curve
Adding respectively people's concentration in the 50mL color-comparison tube is the iron standard solution 0.00,5.00,6.00,7.00,8.00,9.00 of 0.01mg/mL, 10.00mL; Respectively with distilled water diluting to 15～20mL, add the buffer solution 10.0mL of pH=2.2 and 10% sulfosalicylic acid solution 1.00mL again, and shake up behind scale with distilled water diluting, place 20～25min; On spectrophotometer, take iron content as zero solution as blank, measure absorbance at wavelength 500nm place, draw the iron typical curve according to content and the absorbance that records of iron, see Fig. 1.Getting regression equation is: Y=0.0040X+0.0371, (wherein Y is absorbance, and X is iron content, and unit is ug).The range of linearity of iron content is 50～100ug.
Stablize the mensuration of ferric ion ability
In beaker, pipette 1.0mL Fe stabilizer sample, then add excessive standard ferric ion solution 20mL, then with 20% Carbon Dioxide sodium solution the pH value of above-mentioned mixed liquor is transferred to 5～6 (accurate pH test paper tests), solution is heated to boiling with electric jacket, takes off behind 5～6min and be cooled to room temperature; Observation solution becomes turbid, cooled solution all moved into carry out centrifugally in the centrifuge tube, supernatant liquor is poured in the 1000mL volumetric flask after centrifugal, then use at twice distilled water washing precipitation and centrifugal, supernatant liquor after centrifugal is all poured in the volumetric flask, and with its constant volume.
From 1000mL solution, get 1.0mL solution and place the 50mL color-comparison tube, add people pH value and be 2.2 buffer solution 10.0mL and 10% sulfosalicylic acid solution 1.0mL, and shake up behind scale with distilled water diluting, leave standstill 20～25min.On spectrophotometer, take iron content as zero solution as blank, measure absorbance at wavelength 500nm place, obtain iron ion content m with reference to the iron typical curve.
Stablize Fe
3+Ability is calculated by formula (1):
In the formula: N-stablizes Fe
3+The ability of ion, g/L;
V
1The volume of-ferric ion the solution measured, mL;
M-V
1The ferric iron iron ion content that volume is corresponding, mg.
According to this assay method the WT-1 Fe stabilizer is carried out 6 parallel laboratory tests, the results are shown in Table 1.As shown in Table 1, the stable ferric ion ability that the method records is 81.14g/L, and relative standard deviation is 1.51%.
Table 1 Precision Experiment result
Embodiment 2:
Adopt this assay method that 5 kinds of different Fe stabilizeies have been carried out stable ferric ion ability and measure, and mark-on carries out recovery experiment, the results are shown in Table 2.As shown in Table 2, recovery of standard addition is in 100 ± 10% scopes, and accuracy is better.
Table 2 Fe stabilizer recovery testu result
Claims (5)
1. ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer is characterized in that: may further comprise the steps:
Step 1: in the 100mL beaker, pipette 1.0mL Fe stabilizer sample, then add 20.0mL standard ferric ion solution, stir;
Step 2: with sodium carbonate liquor the pH value of above-mentioned mixed liquor is transferred to 5～6, solution is heated to boiling, take off behind 5～6min and be cooled to room temperature, whether the rear observation solution that stops to seethe with excitement is clarified bright;
Step 3: if clarify brightly, continue to pipette 5.0mL standard ferric ion solution with transfer pipet, add in the above-mentioned beaker, repeating step 2 is until solution becomes turbid;
Step 4: cooled solution moved into carry out centrifugally in the 50mL centrifuge tube, supernatant liquor is poured in the 1000mL volumetric flask after centrifugal, then use at twice distilled water washing precipitation and centrifugal, collect whole supernatant liquors in volumetric flask, and with its constant volume;
Step 5: get V the solution behind constant volume
1ML solution places the 50mL color-comparison tube, adds buffer solution l0.0mL and sulfosalicylic acid solution 1.0mL, and shakes up behind scale with distilled water diluting, leaves standstill 20～25min;
Step 6: on spectrophotometer, take iron content as zero solution as blank, measure optical density value at wavelength 500nm place, obtain iron ion content m with reference to the iron typical curve;
Step 7: stablize Fe
3+Ability is calculated by formula (1):
In the formula: N-stablize Fe
3+The ability of ion, g/L;
V
1The volume of-ferric ion the solution measured, mL;
M-V
1The ferric ion content that volume is corresponding, mg.
2. a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer as claimed in claim 1 is characterized in that: the concentration of standard ferric ion solution is that the mass concentration of 5.0mg/mL, sodium carbonate liquor is 20%, the pH value of buffer solution is 2.2, the mass concentration of sulfosalicylic acid solution is 10%.
3. a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer as claimed in claim 2, it is characterized in that: standard ferric ion solution is ferric chloride (FeCl36H2O) solution, buffer solution is hydrochloric acid and potassium hydrogen phthalate solution.
4. a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer as claimed in claim 1, it is characterized in that: the assay method of iron typical curve may further comprise the steps:
Step 1: in the 50mL color-comparison tube, add respectively iron standard solution 0.0,5.0,6.0,7.0,8.0,9.0,10.0mL;
Step 2: in above-mentioned color comparison tube, respectively add distilled water 15～20mL, buffer solution l0mL and sulfosalicylic acid solution 1.0mL, shake up behind scale with distilled water diluting, leave standstill 20～25min;
Step 3: on spectrophotometer, take iron content as zero solution as blank, measure optical density value at wavelength 500nm place, draw the iron typical curve according to content and the optical density value that records of iron.
5. a kind of ferric ion stabilizing capability measurement method of acidification ferric ion stabilizer as claimed in claim 4, it is characterized in that: described iron standard solution is ferriammonium sulfate solution, concentration is 0.01mg/mL.
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| CN103091320A (en) * | 2012-11-13 | 2013-05-08 | 江苏艾兰得营养品有限公司 | Method for testing content of titanium dioxide by complexometric titration-back titration method |
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| CN111751355B (en) * | 2020-07-22 | 2022-05-24 | 攀钢集团研究院有限公司 | Method for determining content of ferrous iron ions in Fe (II) -EDTA (ethylene diamine tetraacetic acid) complex denitration liquid |
| CN111751357B (en) * | 2020-07-22 | 2022-05-24 | 攀钢集团研究院有限公司 | Determination of Fe in a polymorphic iron ion coexisting system in EDTA (ethylene diamine tetraacetic acid) complex denitration liquid2+With Fe3+Method of content |
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| CN113702365A (en) * | 2021-07-27 | 2021-11-26 | 厦门大学深圳研究院 | Method for measuring content of ferric ions in aqueous solution |
| CN116990249B (en) * | 2023-09-26 | 2024-01-30 | 北京挑战农业科技有限公司 | Method for measuring content of ferrous ions in liquid and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776589A (en) * | 2010-01-29 | 2010-07-14 | 东北农业大学 | Method for measuring purine with ultraviolet spectrophotometer |
| CN102200533A (en) * | 2010-03-24 | 2011-09-28 | 上海宝钢工业检测公司 | Method for determination of iron ions by non-chrome complexometry |
-
2011
- 2011-12-21 CN CN 201110449054 patent/CN102519894B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776589A (en) * | 2010-01-29 | 2010-07-14 | 东北农业大学 | Method for measuring purine with ultraviolet spectrophotometer |
| CN102200533A (en) * | 2010-03-24 | 2011-09-28 | 上海宝钢工业检测公司 | Method for determination of iron ions by non-chrome complexometry |
Non-Patent Citations (13)
| Title |
|---|
| L• |
| L•M•科尔索夫.容量分析理论.《定量化学分析(中下册)》.高等教育出版社,1987,第981,987页. * |
| M• |
| 光度法对磺基水杨酸铁配合物的组成及稳定常数的实验研究;李杰;《赤峰学院学报(自然科学版)》;20071030;第23卷(第5期);第39-40、50页 * |
| 国家经济贸易委员会.酸化用铁离子稳定剂性能评价方法.《中华人民共和国石油天然气行业标准》.2003,第2页第6节. |
| 推荐一类贴近生活的基础分析化学综合实验-食品中钙、镁、铁含量测定;王英华;《大学化学》;20061030;第21卷(第5期);第46页第4.4节 * |
| 李杰.光度法对磺基水杨酸铁配合物的组成及稳定常数的实验研究.《赤峰学院学报(自然科学版)》.2007,第23卷(第5期),第39-40、50页. |
| 王英华.推荐一类贴近生活的基础分析化学综合实验-食品中钙、镁、铁含量测定.《大学化学》.2006,第21卷(第5期),第4.4节. |
| 科尔索夫.容量分析理论.《定量化学分析（中下册）》.高等教育出版社,1987,第981，987页. |
| 葡萄酒、果酒、配制酒总糖检验方法的改良研究;马丽辉;《酿酒》;20040530;第31卷(第3期);第981，987页 * |
| 郭小慧.混合显色剂H点标准加入法同时测定水中的Fe(Ⅱ)、Fe(Ⅲ).《化学分析计量》.2005,第14卷(第1期),第44页第2.1节. * |
| 酸化用铁离子稳定剂性能评价方法;国家经济贸易委员会;《中华人民共和国石油天然气行业标准》;20030801;第2页第6节 * |
| 马丽辉.葡萄酒、果酒、配制酒总糖检验方法的改良研究.《酿酒》.2004,第31卷(第3期),第72页. |
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