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Chemical determination method for contents of cobalt and manganese in cobalt-manganese raw material

A technology for chemical determination and manganese content, which can be applied to electrochemical variables of materials, analysis by chemical reaction of materials, and material analysis by observing the influence of chemical indicators. Easy to operate, reduce errors, analyze accurate effects

Active Publication Date: 2017-01-04
JIANGSU UNIV OF TECH
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Problems solved by technology

[0005] Although there are many conventional chemical methods to measure cobalt and manganese alone, because of the similar chemical properties of cobalt and manganese, there is interference, and there are few methods for simultaneous determination of cobalt and manganese

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  • Chemical determination method for contents of cobalt and manganese in cobalt-manganese raw material
  • Chemical determination method for contents of cobalt and manganese in cobalt-manganese raw material
  • Chemical determination method for contents of cobalt and manganese in cobalt-manganese raw material

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Embodiment 1

[0052] The cobalt-manganese raw material treated in this embodiment is the spent cobalt-manganese catalyst produced in the production of PTA, wherein the content of cobalt and manganese measured by ICP-AES is 50.25g / L and 95.75g / L.

[0053]The chemical determination method of cobalt and manganese in the cobalt-manganese raw material of the present embodiment comprises the following steps:

[0054] (1) Accurately pipette 10mL sample into the Erlenmeyer flask, first rinse the mouth of the bottle with a small amount of water, then add 50mL of water, heat the solution to a temperature of 35°C, titrate with EDTA standard solution, first quickly drop 10mL of EDTA solution, add 0.1g Ascorbic acid and 4 drops of ammonium viururate indicator, add dropwise ammonia water with a volume ratio of 1:1 of saturated concentrated ammonia water and water to make the solution orange-yellow, then add 10mL of ammonia buffer solution with pH=10, the solution temperature is controlled At 35°C, contin...

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Abstract

The invention discloses a chemical determination method for the contents of cobalt and manganese in a cobalt-manganese raw material. The method includes the steps that firstly, the cobalt-manganese raw material is titrated with EDTA, and the total concentration of cobalt and manganese in the raw material is obtained; then, manganese is removed through pretreatment, cobalt liquor is obtained, the concentration of cobalt is measured through a potentiometric titration method, and the concentration of manganese is obtained by conducting calculation through a difference method. The method is accurate in analysis, easy and convenient to implement and good in repeatability, and the error rate is smaller than 5%.

Description

technical field [0001] The invention relates to a chemical determination method for cobalt and manganese content in cobalt-manganese raw materials. Background technique [0002] At present, the commonly used methods for determining the cobalt content in cobalt-manganese raw materials mainly include flame atomic absorption spectrometry, ICP-AES method, ICP-MS method and atomic fluorescence method. Using instruments to directly detect metal ions in solution has the advantages of simple operation and high accuracy, but it also has disadvantages, such as expensive equipment, expensive materials, high requirements for samples, and complicated pretreatment of samples. . However, the cobalt-manganese content in the cobalt-manganese raw material is constant, and the accuracy of the instrumental analysis method is lower than that of the chemical method. [0003] Regarding the conventional chemical method to measure cobalt alone, Chinese patent document CN 101504400 (application num...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N27/42
CPCG01N21/78G01N27/42
Inventor 刘维桥高峰沈尧胤王豪郑成邹超何沁华尚通明周全法
Owner JIANGSU UNIV OF TECH
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