CN1415956A - Detection method of degree of hydrolysis in detection of polymer mass - Google Patents
Detection method of degree of hydrolysis in detection of polymer mass Download PDFInfo
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- CN1415956A CN1415956A CN 02144718 CN02144718A CN1415956A CN 1415956 A CN1415956 A CN 1415956A CN 02144718 CN02144718 CN 02144718 CN 02144718 A CN02144718 A CN 02144718A CN 1415956 A CN1415956 A CN 1415956A
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Abstract
This invention relates to hydrolysis test method in polymer quality test. It's easy to use HC1 titration of helianthin-indigo mixed indicator to test HPAM, yet which is mainly used in the HPAM solution matched with distilled water, when PDAM solution contains alkali or amphion, no evident color variation appears at end point of titration, no sudden jump and the end takes long time difficult to be identified. This invention is to add 150ml distilled water into a 250ml beaker, mixed with a magnetic mixer to form a 2cm deep solution whirl and weight 0.18-0.20 g polymer particles accurately with differential test method then to be spreaded uniformly into the whirl in a minute to be mixed till completely dissolved.
Description
Technical field: the present invention relates to the improvement of hydro-polyacrylamide degree of hydrolysis detection method.
Background technology: the size of hydro-polyacrylamide (HPAM) degree of hydrolysis directly influences its usability as the oil field oil displacement agent, is the basic parameter of HPAM structural characterization, the important detection index of evaluation polyacrylamide dry powder quality.The method of measuring the HPAM degree of hydrolysis is a lot, and wherein the hydrochloric titration of methyl orange one indigo mixed indicator is comparatively simple, is widely used, the national standard that the HPAM degree of hydrolysis that is positioned is measured.But this method is mainly used in the HPAM solution of distilled water preparation, when HPAM solution contains alkalescence or zwitter-ion, influences measurement result as NaCl, CaCl2, HCO3-, SO42-, CO32-.Measure according to examination criteria, change color is not obvious during titration end-point, does not have hop, and terminal point drags very longly, is difficult to identification, makes measurement result inaccurate.
Summary of the invention: for solving the problem that prior art exists, the invention provides degree of hydrolysis detection method in a kind of polymer quality detection, use this method should be able to overcome few, the unconspicuous shortcoming of indicator discoloration of hydrochloric acid standard solution consumption in the original method, and have the error that human factor is brought in the testing process of making and significantly reduce, the characteristics that the relative standard deviation of gained data reduces.The present invention is achieved in that and adds 150ml distilled water in the 250ml beaker, start magnetic stirring apparatus, make the dark vortex of liquid formation 2cm in the beaker, accurately take by weighing the polymer beads of 0.18～0.20g with difference assay, in one minute it evenly is sprinkled in the vortex, stirring is dissolved it fully.With conductivity meter preheating 10 minutes, press 2 μ s/cm range buttons, the control capacittance compensation, making the instrument number of degrees is 000.Conductivity meter constant compensation knob is transferred to 50, and the temperature knob is transferred to 25 ℃ of positions of solution temperature, and the range multiplying power is transferred to the 2mS/cm shelves, treat that the instrument data presented is stable after, electrode is inserted polymer solution, begin to carry out titration with hydrochloric acid standard solution.Each 0.5ml hydrochloric acid standard solution that adds treats that the instrument data presented stablize conductivity value under the postscript, stops titration above 1.5 o'clock to conductivity value.
Volume with consumed hydrochloric acid is a horizontal ordinate, is K～V figure.To respectively simulate straight line near straight line portion in curve first half and the latter half among the figure, the hydrochloric acid standard solution volume that the consumes when horizontal ordinate of two straight-line intersections is titration end-point.With the computing formula below its substitution:
In the formula: HD is a degree of hydrolysis, %; C is the concentration of hydrochloric acid standard solution, mol/L; V is the milliliter number of the hydrochloric acid standard solution of sample solution consumption, ml; M is the quality of sample, g; S is a solid content; The 23rd, the difference of PAA and acrylamide chain link quality; The 71st, the quality of the acrylamide chain link suitable with 1.00ml hydrochloric acid standard solution [c (HCL)=1.00mol/L].The employed conductivity meter of detection method of the present invention is a DDS-12A type electric conductivity instrument, and employed electrode is a DJS-1 type platinum black electrode, and employed hydrochloric acid standard solution is the 0.1mol/L hydrochloric acid standard solution.The present invention has overcome few, the unconspicuous shortcoming of indicator discoloration of hydrochloric acid standard solution consumption in the original method, having the error that human factor is brought in the testing process of making significantly reduces, the relative standard deviation of gained data reduces, and detects the advantage that the data accuracy obviously improves.
Embodiment: present embodiment is to realize like this, in the 250ml beaker, add 150ml distilled water, start magnetic stirring apparatus, make the dark vortex of liquid formation 2cm in the beaker, accurately take by weighing the polymer beads of 0.18～0.20g with difference assay, in one minute it evenly is sprinkled in the vortex, stirring is dissolved it fully.With conductivity meter preheating 10 minutes, press 2 μ s/cm range buttons, the control capacittance compensation, making the instrument number of degrees is 000.Conductivity meter constant compensation knob is transferred to 50, and the temperature knob is transferred to 25 ℃ of positions of solution temperature, and the range multiplying power is transferred to the 2mS/cm shelves, treat that the instrument data presented is stable after, electrode is inserted polymer solution, begin to carry out titration with hydrochloric acid standard solution.Each 0.5ml hydrochloric acid standard solution that adds treats that the instrument data presented stablize conductivity value under the postscript, stops titration above 1.5 o'clock to conductivity value.
Claims (4)
1, degree of hydrolysis detection method during polymer quality detects, it is characterized in that in the 250ml beaker, adding 150ml distilled water, start magnetic stirring apparatus, make the dark vortex of liquid formation 2cm in the beaker, accurately take by weighing the polymer beads of 0.18～0.20g with difference assay, in one minute, evenly be sprinkled into it in vortex, stirring is dissolved it fully, with conductivity meter preheating 10 minutes, press 2 μ s/cm range buttons, the control capacittance compensation, making the instrument number of degrees is 000, and conductivity meter constant compensation knob is transferred to 50, the temperature knob is transferred to 25 ℃ of positions of solution temperature, the range multiplying power is transferred to the 2mS/cm shelves, treat that the instrument data presented is stable after, electrode is inserted polymer solution, begin to carry out titration with hydrochloric acid standard solution, each 0.5ml hydrochloric acid standard solution that adds treats that the instrument data presented stablize conductivity value under the postscript, stops titration above 1.5 o'clock to conductivity value.
2, degree of hydrolysis detection method during polymer quality according to claim 1 detects is characterized in that described conductivity meter is a DDS-12A type electric conductivity instrument.
3, degree of hydrolysis detection method during polymer quality according to claim 1 detects is characterized in that described electrode is a DJS-1 type platinum black electrode.
4, degree of hydrolysis detection method during polymer quality according to claim 1 detects is characterized in that described hydrochloric acid standard solution is the 0.1mol/L hydrochloric acid standard solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144718 CN1207561C (en) | 2002-12-05 | 2002-12-05 | Detection method of degree of hydrolysis in detection of polymer mass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 02144718 CN1207561C (en) | 2002-12-05 | 2002-12-05 | Detection method of degree of hydrolysis in detection of polymer mass |
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| CN1415956A true CN1415956A (en) | 2003-05-07 |
| CN1207561C CN1207561C (en) | 2005-06-22 |
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| CN 02144718 Expired - Fee Related CN1207561C (en) | 2002-12-05 | 2002-12-05 | Detection method of degree of hydrolysis in detection of polymer mass |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799402A (en) * | 2010-03-12 | 2010-08-11 | 宁波工程学院 | Method for judging solubility of amphoteric ionic polyacrylamide in water by visual chromatic aberration method |
| CN102520117A (en) * | 2011-10-23 | 2012-06-27 | 四川光亚聚合物化工有限公司 | Method for testing hydrolysis degree of hydrophobically associating polymer in oil reservoir sewage |
| CN105424533A (en) * | 2015-11-14 | 2016-03-23 | 山东宝莫生物化工股份有限公司 | Hydrolysis degree determination method for polyacrylamide with high hydrolysis degree |
| CN109557247A (en) * | 2019-01-18 | 2019-04-02 | 王雷 | A kind of degree of hydrolysis measuring instrument and its measurement method |
| CN112881588A (en) * | 2021-01-18 | 2021-06-01 | 大庆油田有限责任公司 | Method for measuring hydrolysis degree of partially hydrolyzed polyacrylamide for oil displacement |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769871B (en) * | 2009-12-31 | 2015-01-21 | 宁波工程学院 | Method for judging dissolvability of non-ionic polyacrylamide in water through visual inspection of color difference |
-
2002
- 2002-12-05 CN CN 02144718 patent/CN1207561C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799402A (en) * | 2010-03-12 | 2010-08-11 | 宁波工程学院 | Method for judging solubility of amphoteric ionic polyacrylamide in water by visual chromatic aberration method |
| CN101799402B (en) * | 2010-03-12 | 2014-12-31 | 宁波工程学院 | Method for judging solubility of amphoteric ionic polyacrylamide in water by visual chromatic aberration method |
| CN102520117A (en) * | 2011-10-23 | 2012-06-27 | 四川光亚聚合物化工有限公司 | Method for testing hydrolysis degree of hydrophobically associating polymer in oil reservoir sewage |
| CN105424533A (en) * | 2015-11-14 | 2016-03-23 | 山东宝莫生物化工股份有限公司 | Hydrolysis degree determination method for polyacrylamide with high hydrolysis degree |
| CN109557247A (en) * | 2019-01-18 | 2019-04-02 | 王雷 | A kind of degree of hydrolysis measuring instrument and its measurement method |
| CN109557247B (en) * | 2019-01-18 | 2024-04-12 | 北京盛维基业科技有限公司 | Hydrolysis degree measuring instrument and measuring method thereof |
| CN112881588A (en) * | 2021-01-18 | 2021-06-01 | 大庆油田有限责任公司 | Method for measuring hydrolysis degree of partially hydrolyzed polyacrylamide for oil displacement |
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| CN1207561C (en) | 2005-06-22 |
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