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Preparation method of lanthanum sulfate

A technology of lanthanum sulfate and sulfuric acid, which is applied in the preparation/treatment of rare earth metal compounds, rare earth metal sulfate, etc., can solve the problems of the genetic system of protein metabolism, changes in the nervous system, blood, blood vessels, toxicity, etc., to achieve The reaction process is simple, the production cost is low, and the effect of production cost reduction

Inactive Publication Date: 2021-06-29
江苏温塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead phosphite has a toxic effect on the human body, can cause changes in the nervous system, blood, and blood vessels, and has a greater impact on protein metabolism, cell energy balance, and the genetic system of cells.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of lanthanum sulfate, comprises the following steps:

[0018] Step 1. Add an appropriate amount of water into the reaction kettle, heat and stir the water, and keep the water temperature at 20°C. Step 2. Add sulfuric acid and lanthanum oxide successively to the water. The stirring speed when adding sulfuric acid is 80 / min, and then Continue to stir evenly and keep the temperature of the water at 60°C. Water, sulfuric acid, and lanthanum oxide are synthetically reacted to generate lanthanum sulfate, wherein the molar ratio of sulfuric acid to lanthanum oxide is 1:1;

[0019] Step 3, the lanthanum sulfate product is cooled to room temperature 25 °, then puts into filter and filters; Adopt centrifuge to filter during filtering;

[0020] Step 4. Put the filtered material into an oven, keep the oven temperature at 100°, dry for 24 hours, and pulverize the dried material to obtain the finished lanthanum sulfate.

Embodiment 2

[0022] The preparation method of lanthanum sulfate, comprises the following steps:

[0023] Step 1. Add an appropriate amount of water into the reaction kettle, heat and stir the water, and keep the water temperature at 35°C;

[0024] Step 2. Continuously drip sulfuric acid and lanthanum oxide into the water successively. The stirring speed when adding sulfuric acid is 120 R / min, then continue to stir evenly and keep the temperature of the water at 65°C. The synthetic reaction of water, sulfuric acid and lanthanum oxide produces lanthanum sulfate. Wherein the mol ratio of sulfuric acid and lanthanum oxide is 1:0.65;

[0025] Step 3, the lanthanum sulfate product is cooled to room temperature 30 °, then puts into filter and filters, adopts centrifuge to filter during filtering;

[0026] Step 4. Put the filtered material into an oven, keep the temperature of the oven at 150°, dry for 36 hours, and pulverize the dried material to obtain the finished lanthanum sulfate.

Embodiment 3

[0028] The preparation method of lanthanum sulfate, comprises the following steps:

[0029] Step 1. Add an appropriate amount of water into the reaction kettle, heat and stir the water, and keep the water temperature at 35°C;

[0030] Step 2, continuously drop sulfuric acid and lanthanum oxide into the water successively, the stirring speed when adding the sulfuric acid is 80R / min, then continue to stir evenly and keep the temperature of the water at 65°C, the synthetic reaction of water, sulfuric acid and lanthanum oxide produces lanthanum sulfate, Wherein the molar ratio of sulfuric acid to lanthanum oxide is 1:0.8

[0031] Step 3, the lanthanum sulfate product is cooled to room temperature 25 °, then puts into filter and filters, adopts centrifuge to filter during filtering;

[0032] Step 4. Put the filtered material into an oven, keep the temperature of the oven at 150°, dry for 30 hours, and pulverize the dried material to obtain the finished lanthanum sulfate.

[0033]...

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PUM

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Abstract

The invention discloses a preparation method of lanthanum sulfate, which comprises the following steps: carrying out hydration reaction on water, sulfuric acid and lanthanum oxide to obtain lanthanum sulfate, and then conducting filtering, drying and crushing to obtain the finished product lanthanum sulfate. The whole reaction process is simple, the production cost is low, the method is economical and considerable, the product quality is stable, the filtrate can be recycled for multiple times, no wastewater is discharged, and the national environmental protection requirement is met.

Description

technical field [0001] The invention relates to the synthesis of chemical products, in particular to a preparation method of lanthanum sulfate. Background technique [0002] Rare earth (Rare Earth) is a general term for seventeen metal elements including lanthanides, scandium and yttrium in the chemical periodic table. There are 250 kinds of rare earth minerals in nature. Rare earths were first discovered by Finnish chemist John Gadolin. In 1794, the first rare earth "element" (yttrium earth, or Y2O3) was isolated from a heavy ore shaped like asphalt. Because rare earth minerals were found in the 18th century, only a small amount of insoluble in water could be produced by chemical methods at that time. Oxides of rare earths have been customarily referred to as "earth" in history, hence the name rare earths. [0003] my country is rich in rare earth resources and is currently the country with the largest reserves in the world. Among them, rare earth phosphorous acid compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/10C01F17/282
CPCC01F17/10C01F17/282
Inventor 邵泰新张伟李明
Owner 江苏温塑实业有限公司
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