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Method for preparing iron oxalate

A ferrous oxalate and ferrous sulfate solution technology, applied in the chemical industry, can solve the problems of high production cost and complicated process, achieve low raw material cost, good impurity removal effect, and solve the effect of difficult to handle

Inactive Publication Date: 2010-06-02
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of whether slag or ore is used to produce ferrous oxalate, it needs to go through processes such as crushing, fine grinding, acid leaching, impurity removal, and synthesis. The process is relatively complicated and the production cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The specific implementation of the present invention will be further described below in conjunction with the examples, and the present invention is not limited to the scope of the examples.

[0021] Embodiment adopts the inventive method to prepare ferrous oxalate

[0022] 1. Dissolve 500 grams of vitriol (the by-product of producing titanium dioxide by the sulfuric acid method) in 800 ml of boiling water, stir to dissolve, and slowly add 1:1 (V / V) ammonia water (that is, the most concentrated commercially available product) while stirring. Ammonia and water are prepared by volume 1:1), the pH value of the solution is adjusted to 6, filtered, and the filtrate is used for subsequent use;

[0023] 2. Solvent extraction

[0024] 2.1 Extraction: P2O4 and No. 260 kerosene were prepared into an organic phase at a volume ratio of 2:3, and the organic phase was mixed with the filtrate of step 1 at a volume ratio of 1.5:1 (that is, O / A=1.5 / 1), and shaken for 5 minutes. The num...

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PUM

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Abstract

The invention relates to a method for preparing iron oxalate, belonging to the field of chemical engineering. The method for preparing iron oxalate can recycle by-product of copperas generated when preparing titanium pigment with titanium concentrate. The method for preparing iron oxalate takes the by-product of copperas generated when preparing the titanium pigment with the titanium concentrate as raw materials, and comprises the following steps of: a. adding water to the copperas for dissolution to obtain a ferrous sulfate solution, adjusting pH value to be 5.6 to 6.5 by utilizing ammonia, filtering the solution; b. extracting the filtrate by utilizing P2O4, separating the filtrate to obtain an organic phase and a water phase; c. and adding a solution containing F to the water phase so as to deposit Mg<2+>, filtering the solution, adding an oxalic acid solution to the filtrate, and filtering the solution to obtain iron oxalate crystallization. The invention not only solves the problem of stacking the copperas, but also enhances the economic value of the copperas, provides a new choice for treating the by-product of copperas generated when preparing titanium pigment with a sulfuric acid method, and has wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing ferrous oxalate, which belongs to the field of chemical industry. Background technique [0002] Using titanium concentrate as raw material, when sulfuric acid method is used to produce titanium dioxide, a large amount of iron in titanium concentrate will be dissolved to form ferrous sulfate, and FeSO will crystallize when it is separated from titanium liquid through the process of freezing and removing iron. 4 ·7H 2 O (green vitriol). TiO in Titanium Concentrates in Panzhihua, my country 2 The content is about 47%. When using this kind of titanium concentrate to produce titanium dioxide, about 3.5 tons of by-product greenite will be obtained for every 1 ton of titanium dioxide produced. With the expansion of titanium dioxide production capacity, the green vitriol problem has become an important factor restricting the production of sulfuric acid titanium dioxide. Due to the limited use of green vitriol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C55/07C07C51/41
Inventor 陈祝春刘森林李哲程世华黄家旭陆平李良罗建林
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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