Method for efficiently preparing ferrate based on nascent interfacial activity
AssigneeHarbin Institute of Technology
InventorsJun Ma, Yulei Liu, Lu Wang, Qingliang Liu, Xiaodan Zhao
Life of this patent
Estimating the term…
Abstract
A method for efficiently preparing ferrate based on nascent state interfacial activity. The method is as follows: (a) preparing nascent iron solution; (b) adding an oxidizing agent to the iron solution of step (a); (c) adding alkali solution or alkali particles to the mixed solution of step (b), mixing by stirring, and carrying out solid-liquid separation; (d) adding a stabilizing agent to the liquid separated out in step (c), and thus obtaining ferrate solution. The yield is 78-98%. The prepared ferrate solution is stable and can be stored for 3-15 days.
Claims14
A high efficiency preparation method for ferrate based on activity in nascent state interface, characterized in that, the high efficiency preparation method for ferrate based on activity in nascent state interface comprises the steps of:
- (a) adding solid iron salt to a first alkaline solution with a pH of 5˜9 for hydrolysis and producing an iron solution in nascent state with an equivalent concentration of iron of 0.0001˜1 mol/L;
- (b) measuring and obtaining 5˜100 mL of the iron solution in nascent state from step (a), adding an oxidizing agent based on a molar ratio of the iron in nascent state and the oxidizing agent at 1:0.1˜20 and mixing the oxidizing agent with the iron solution in nascent state to obtain a mixture;
- (c) under 5° C.-60° C., adding 5-100 mL second alkaline solution or 0.2˜70 g alkaline granules to the mixture from the step (b), wherein the second alkaline solution has a concentration of 0.1˜16 mol/L;
- then stirring and mixing for 0.1˜30 min to form an intermediate solution;
- after the intermediate solution turns purplish black color completely, processing solid-liquid separation by centrifugation or filtration to obtain a liquid;
- and
- (d) adding stabilizing agent based on a molar ratio of the equivalent concentration of iron in the liquid from the step (c) and the stabilizing agent to obtain a ferrate solution, where a molar ratio of an equivalent concentration or iron in the liquid from the step (c) to the stabilizing agent is 1:0.1-10.
A high efficiency preparation method for ferrate based on activity in nascent state interface, characterized in that, the high efficiency preparation method for ferrate based on activity in nascent state interface comprises the steps of:
- (a) adding solid iron salt to a first alkaline solution with a pH of 5˜9 for hydrolysis and producing an iron solution in nascent state with an equivalent concentration of iron of 0.0001˜1 mol/L;
- (b) measuring and obtaining 5˜100 mL of the iron solution in nascent state from the step (a), adding 5˜100 mL second alkaline solution or 0.2˜70 g alkaline granules to the iron solution in nascent state, wherein with the second alkaline solution has a concentration of 0.1˜16 mol/L;
- stirring to mix and obtaining a mixture;
- (c) under 5° C.-60° C., adding an oxidizing agent based on a molar ratio of the iron in nascent state and the oxidizing agent at 1:0.1˜20 to the mixture obtained from the step (b), stirring and mixing for 0.1˜30 min to form an intermediate solution;
- after the intermediate solution turns purplish black color completely, processing solid-liquid separation by centrifugation or filtration to obtain a liquid;
- and
- (d) adding stabilizing agent based on a molar ratio of the equivalent concentration of iron in the liquid obtained from the step (c) and the stabilizing agent to obtain a ferrate solution, wherein a molar ratio of an equivalent concentration of iron in the liquid from the step (c) to the stabilizing agent is 1:0.1-10.
Dependencies are inferred from the claim text.