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Method for measuring influence of chelant additive quantity on chelating quantity of copper ions

A technology of copper ions and chelating agents, applied in color/spectral characteristic measurement, absorption/scintillation/reflection spectroscopy, spectrum investigation, etc., can solve problems such as narrow molecular weight distribution, limited molecular chain growth, low molecular weight of products, etc. Simplicity, reduced measurement cost, and high measurement accuracy

Inactive Publication Date: 2012-05-23
袁俊海
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Problems solved by technology

Because the organic solvent used in the precipitation polymerization process is a very active chain transfer agent for the polymerization of acrylamide, and most organic solvents are precipitation agents for polyacrylamide. When the molecular chain of the polymer grows to a certain length, it will It will precipitate and limit the further growth of the molecular chain, so the molecular weight of the obtained product is low and the molecular weight distribution is narrow

Method used

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  • Method for measuring influence of chelant additive quantity on chelating quantity of copper ions
  • Method for measuring influence of chelant additive quantity on chelating quantity of copper ions

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Embodiment

[0034] A kind of method that the present invention relates to measuring the addition of chelating agent to the influence of copper ion chelating amount comprises the following steps:

[0035] (a) preparing a chelating agent for use;

[0036] (b) prepare copper ion solution;

[0037] (c) adding different amounts of chelating agent solutions to the copper ion solution respectively;

[0038] (d) after stirring at room temperature, take out the supernatant and measure its absorbance;

[0039] (e) Calculate the chelated Cu 2+ amount.

[0040] (f) through Cu 2+ The amount that obtains the influence of chelating agent adding amount on copper ion chelating amount.

[0041] In the step (b), the pH of the prepared copper ion solution is 5.8.

[0042] In the step (b), the volume of the prepared copper ion solution is 100ml.

[0043] In the step (b), the prepared copper ion solution has a concentration of 50 mg / L.

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Abstract

The invention discloses a method for measuring the influence of chelant additive quantity on the chelating quantity of copper ions. The method comprises the steps of: preparing a heavy metal chelant for later use; preparing a copper ion solution; respectively adding chelant solutions in different quantities to the copper ion solution; taking out the supernatant liquors respectively to measure the absorbance after agitation; solving the quantity of chelate Cu<2+>; and obtaining the influence on the removal rate according to the quantity of chelate Cu<2+>. The method disclosed by the invention can be used for rapidly measuring the influence of the chelant additive quantity on the chelating quantity of the copper ions, has high measurement precision and simple measurement steps, is beneficial to reduction of the measurement cost and provides a good data base for use of the chelant.

Description

technical field [0001] The invention relates to a method for measuring the influence of the added amount of a chelating agent on the chelated amount of copper ions. Background technique [0002] Facing the current situation of my country's environmental protection and the pressure brought by the international green fortress, it is very urgent to carry out the development and research of oilfield environmental protection technology in my country and solve the major environmental protection problems that plague my country's social and economic development. [0003] In the process of oil and gas exploration and development, oil and gas companies have adopted a large number of measures such as drilling and other oil and gas wells to put into production and increase production, resulting in a large amount of drilling sewage. During drilling, each well produces 400-500m of drilling sewage 3 , waste drilling fluid 500~700m 3 . At present, solving the pollution problem of sewage h...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01J3/42
Inventor 袁俊海
Owner 袁俊海
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