Method for measuring cation degree of amphoteric ion sulfonated phenolic resin
A technology of sulfonated phenolic resin and zwitterions, which is applied in the field of chemical analysis, can solve the problems of loss of cationic groups, large measurement deviation of phosphotungstic acid volumetric method, low elution rate of anionic groups, etc., so as to improve accuracy and widely The effect of low requirements on applicability and equipment conditions
Active Publication Date: 2018-04-03
SINOPEC SSC +1
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Problems solved by technology
Enterprise Standard Q / SH1025 0779-2011 "General Technical Specifications for Zwitterionic Sulfomethylphenolic Resins for Drilling Fluids" Although the anionic sulfonic acid groups are first eluted through the cation exchange resin, but not only the anionic groups There is a low elution rate and the loss of cationic groups, resulting in a large measurement deviation of the phosphotungstic acid volumetric method
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[0030] The assay method of the cationic degree of zwitterionic sulfonated phenolic resin in this embodiment, the specific operation steps are:
[0031] 1) Determination of the adsorption capacity m of 0.5g pure zwitterionic sulfonated phenolic resin in diatomite 吸 ;
[0032] A: Determination of the mass percentage of water-insoluble matter:
[0033] a: Take the sample mass m of the sample to be tested 1 It is 1.0004g (weighed to 0.0001g), put it in a 150mL beaker, add 100mL distilled water, stir well, heat in a boiling water bath for 1h, and obtain the aqueous solution of the sample to be tested;
[0034] b: Transfer the aqueous solution of the sample to be tested prepared in step a into 6 centrifuge tubes that have been dried at 105±2°C to constant weight twice, and record the mass of the empty tubes of the 6 centrifuge tubes as m 8 , put the above 6 centrifuge tubes into a centrifuge with a rotating speed of 3000r / min for 20min, take out the ion tube, suck out the upper p...
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The invention relates to the technical field of chemical analysis, in particular to a method for measuring the cation degree of amphoteric ion sulfonated phenolic resin. The method comprises steps asfollows: firstly, the adsorption quantity m(adsorption) of every 0.5 g of pure amphoteric ion sulfonated phenolic resin in diatomite is measured, then the adsorption quantity m(adsorption) is substituted into a formula as follows: A=863.87m(adsorption)-24.54, and the cation degree A of the amphoteric ion sulfonated phenolic resin is calculated. On the basis that cationic quaternary ammonium groupson molecular chains of the amphoteric ion sulfonated phenolic resin have good adsorption performance, adsorption mass is calculated according to mass change of a to-be-tested sample before and afteradsorption by utilizing the diatomite as a standard adsorbing medium; according to the cation degree measuring method based on an adsorption weighing method, the influence of anions on the measuring process and a measuring result in the prior art is avoided, accuracy of a detection result is improved, furthermore, the method has wide applicability and higher operability, the requirement for instruments and equipment is low, and the method can be popularized and applied in conventional detection laboratories.
Description
technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a method for measuring the cationic degree of zwitterionic sulfonated phenolic resin. Background technique [0002] In recent years, with the development of drilling fluid treatment agents, cationic polymer treatment agents have shown good application effects in solving problems such as wellbore instability and clay mineral pollution to drilling fluids due to their excellent inhibition and anti-slump properties, reducing the Downhole complexity and reduction of comprehensive drilling costs are one of the research hotspots of oilfield chemists. Zwitterionic sulfonated phenolic resin is a synthetic resin based on sulfonated phenolic resin and introduced cationic groups. Due to the introduction of cationic groups in the molecular chain, the inhibition and anti-slump performance of the product are increased, and it is used as a common drilling fluid. Treatment agents are w...
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Login to View More IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 黄宁孟丽艳张希红史康玲常建芳
Owner SINOPEC SSC