Production process of high pure superfine tin oxide

A production method and technology of tin oxide, applied in tin oxide and other directions, can solve the problems of environmental pollution, high cost of organic solvents, corrosion of equipment, etc., and achieve the effect of simple process

Inactive Publication Date: 2010-11-03
GANZHOU RUIDE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nano SnO 2 Most of the powder production uses chlorine, nitric acid, and organic solvents, which either pollute the environment, corrode equipment, or use organic solvents. The cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] 100kg of stannous chloride is dissolved in 300kg of water, 60kg of sodium oxalate is dissolved in 500kg of water, the two react to produce a white stannous oxalate precipitate, and the precipitate is washed with water until there is no Cl - , filtered, and dried at 100°C to obtain SnC 2 o 4 The dry product is about 90kg.

[0042] Put the dry stannous oxalate into a container, put it into an electric furnace and heat it up to 400°C, keep it warm for 60 minutes, let it stand for 1 hour, continue to heat up to 1000°C, keep it warm for 2 hours, and get white SnO 2 The powder is about 65kg.

[0043] 8% AR grade hydrochloric acid solution 350kg, add 65kg SnO in stirring 2 For powder, heat up to 80°C, stir and keep warm for 1 hour, precipitate, wash with deionized water until there is no CL - , filtered, dried at 100-120°C, and crushed to obtain a dry product. Its average particle size is about 400nm, the purity is 99.80%, and the bulk density is 0.3g / cm 3 .

example 2

[0045] 200kg of stannous chloride is dissolved in 700kg of water, 120kg of sodium oxalate is dissolved in 1200kg of water, the two react to form a white stannous oxalate precipitate, wash with water until no CL - , filter, and dry at 120°C to obtain stannous oxalate dry product, about 180kg.

[0046] Put stannous oxalate in a container, raise the temperature to 500°C in an electric furnace and keep it for 2 hours, let it stand for 2 hours, continue to heat up to 1400°C, keep it for 1 hour, and get white SnO 2 The powder is about 130kg.

[0047] 10% AR grade HCL solution 800kg, add 130kgSnO in stirring 2 Heat up the powder to 100°C, heat and stir for 2 hours, precipitate, and wash with deionized water until there is no CL - , filtered, dried at 130°C, and pulverized to obtain dry SnO 2 Powder. Its average diameter is 360nm, its purity is 99.58%, and its bulk density is 0.28g / cm 3 .

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Abstract

The invention discloses a manufacturing method of a high-pure super-fined tin oxide. The manufacturing method comprises the steps as follows: a tin oxalate is firstly prepared by the soluble tin salt and soluble oxalate; the tin oxalate is washed and dried, then is discomposed with a moderate temperate and then is baked with high temperature, and the baked tin oxide powder is pickled with a reagent grade inorganic acid and then is washed with a deionized water till the CL <-> is washed away, and then the high-pure super-fined tin oxide with average granule-diameter which is less than 1 micrometer and a purity which is equal to or greater than 99.5 percent and loose density which is 0.2 to 0.80g per cm <3> can be obtained sequentially by filtering, drying and crushing. The manufacturing process is verified through a pilot scale production.

Description

technical field [0001] The invention relates to a production method of high-purity ultrafine tin oxide powder. Background technique [0002] High-purity ultra-fine tin oxide is a new type of powder material, which is widely used in many fields such as electronic and electrical materials, ceramics, glass, catalysts, etc. There are many people who study the preparation technology of high-purity ultra-fine tin oxide, and there are many important technological breakthroughs, the synthesis of SnO 2 The methods of powder materials include gas phase synthesis method, liquid phase synthesis method and solid phase synthesis method. [0003] Such as the patent applied by Zhejiang University to SnCL 4 .5H 2 O and NaOH were used as raw materials to prepare pure nano-SnO by ball milling and roasting 2 . The Shanghai Institute of Ceramics, Chinese Academy of Sciences uses tin powder, nitric acid, and organic matter as raw materials to react, precipitate with ammonia water, wash with e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/02
Inventor 易绍文易鹤翔叶军寿
Owner GANZHOU RUIDE CHEM
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