Method for measuring calcium exchange capacity of 4A zeolite
A technology of exchange capacity and zeolite, which is applied in the field of measuring the calcium exchange capacity of 4A zeolite, which can solve the problems of long analysis time, increased analysis steps, color observation, and acidity control error.
Active Publication Date: 2011-07-20
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology
[0003] At present, the method for analyzing the calcium exchange capacity of 4A zeolite mostly adopts the EDTA titration method, which uses many chemical reagents. Calcium chloride is used to prepare the standard solution. Since calcium chloride is used as a gas desiccant and is easy to absorb water, it must be calibrated. Increase the analysis steps, the analysis time is long, the selection of the titration process indicator needs to be studied, the observation of color, the control of acidity, etc. are prone to errors
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Embodiment 1
[0020] Equipment and reagents used:
[0021] American thermoelectric Intrepid IRIS inductively coupled plasma atomic emission spectrometer (ICP); DZKYW-4 electronic constant temperature water bath; PHS-3C precision PH meter.
[0022] CaCO for sample adsorption 3 (Basic), the working curve is purchased from the National Standard Material Center with Ca standard solution, the concentration of the working curve series; Analysis, the linear correlation coefficient was greater than 0.9995.
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The invention relates to a method for measuring the calcium exchange capacity of 4A zeolite, in particular to a method for measuring the calcium exchange capacity of 4A zeolite serving as a washing detergent builder. The method is characterized by comprising the following steps of: measuring by using an inductive coupled plasma emission spectrometer (ICP), introducing a dissolved sample into the ICP, measuring Ca content in solution quantitatively according to the proportional relation of emission light intensity and the concentration of Ca in the sample under the selected instrument measuring condition, and converting into calcium exchange capacity in the 4A zeolite sample. In the method for measuring the calcium exchange capacity of the 4A zeolite, the calcium exchange capacity in the 4A zeolite can be measured accurately and quickly to meet the requirement of producing the 4A zeolite which meets quality requirements of national standards.
Description
technical field [0001] A method for measuring the calcium exchange capacity of 4A zeolite relates to a method for determining the calcium exchange capacity of 4A zeolite used as a detergent builder. Background technique [0002] 4A zeolite is a newly developed detergent builder for washing products in recent years. Due to its porous and connected network structure, it has strong adsorption capacity. It can absorb a large amount of calcium ions in water, soften hard water, and can also co-precipitate with insoluble dirt. function, so that the detergent can play its cleaning performance more effectively, and the calcium exchange capacity of 4A zeolite is an important index to evaluate the quality of 4A zeolite. [0003] At present, the method for analyzing the calcium exchange capacity of 4A zeolite mostly adopts the EDTA titration method, which uses many chemical reagents. Calcium chloride is used to prepare the standard solution. Since calcium chloride is used as a gas desic...
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Inventor 李跃平张树朝张洁吴豫强
Owner GUIZHOU BRANCH CHINA ALUMINUM IND