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Method for testing polymerization reaction conversion rate

A technology of polymerization reaction and determination method, applied in the direction of using chemical indicators for analysis, using titration method for chemical analysis, etc., can solve the problems of long time, increase construction cost, low viscosity of acid liquid system, etc., achieve simple test steps, reduce The effect of high test cost and high test accuracy

Inactive Publication Date: 2013-03-27
蔡雨江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the thickeners currently used in various oil fields need more time to be prepared on site, which increases the construction cost. The prepared acid liquid system has low viscosity and poor shear resistance, which cannot meet the needs of the measures well. , which limits the function of the thickener

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment

[0036] The present invention relates to a kind of assay method of conversion rate of polymerization reaction, comprises the following steps:

[0037] (a) Before the polymerization reaction starts, weigh a certain amount of monomer mixture W c , add distilled water to dissolve;

[0038] (b) Use a pipette to accurately add a certain volume of potassium bromate-potassium bromide and hydrochloric acid solution to the test solution, immediately cover the stopper, shake well, place in a dark place for reaction, quickly add potassium iodide solution, and use thiosulfuric acid Sodium standard solution titration;

[0039] (c) When titrating to light yellow, add starch indicator and continue titrating until the blue-purple disappears, which is the end point;

[0040] (d) record the volume V of sodium thiosulfate standard solution consumed 2 , while doing a blank experiment to record V 1 ;

[0041] (e) After finishing the reaction, take a certain amount of product mixture W s , dub...

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Abstract

The invention discloses a method for testing a polymerization reaction conversion rate, which comprises the steps of (a) weighing a monomer mixture Wc and dissolving; (b) adding potassium bromate-potassium bromide and a hydrochloric acid solution; tightly covering; uniformly shaking; adding a potassium iodide solution and titrating; (c) titrating until the solution is light yellow; adding a starch indicator; continuing to titrate until the blue violet disappears; (d) recording volume V2 of consuming sodium thiosulfate standard solution, and making a blank experiment record V1; and (e) after the reaction, weighing a certain amount of product mixture Ws; preparing testing liquid; and implementing a same experiment as above to obtain V11 and V22. The method for testing the polymerization reaction conversion rate disclosed by the invention can rapidly test the polymerization reaction conversion rate, and is high in resting precision, simple in testing step and greatly reduced in testing cost.

Description

technical field [0001] The invention relates to a method for measuring the conversion rate of a polymerization reaction. Background technique [0002] Acidizing technology has become an important technical measure and development means for reservoir engineers at home and abroad to relieve the clogging of oil and water wells near the wellbore, expand or extend oil and gas flow channels, improve formation permeability, increase production and injection, especially for some carbonate reservoirs It is more important for the efficient exploitation and development of some sandstone reservoirs. As a slow acid, thickened acid is used more and more, and this development trend will accelerate in the future. Thickening acid is mainly used in acid fracturing treatment. [0003] Because the thickener increases the viscosity of the acid liquid, reduces the squeezeability of the acid, and often prolongs the construction time needlessly, so the thickener is rarely used in the acidificatio...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N31/22
Inventor 蔡雨江
Owner 蔡雨江