Method for preparing bismuth-series chemical product

A chemical product, bismuth series technology, applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve the problem of large nitric acid consumption, and achieve the effects of low production cost, environmental friendliness, and easy operation

Inactive Publication Date: 2011-11-16
湖南金泰铋业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of bismuth nitrate from refined bismuth not only consumes a large amount of nitric acid, but also releases a large amount of NO x Carcinogenic poisonous gas, when bismuth oxide and other bismuth chemical products are prepared from bismuth nitrate, a large amount of chemical reagents are consumed, and a large amount of waste water and waste gas are discharged

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 Preparation example of ordinary grade bismuth oxide ①

[0048] Firstly, crush 1000g of fine bismuth blocks, and then grind them into -60 mesh 90% bismuth powder in a ball mill; After setting the temperature at 550°C, push it into the tube furnace, and pass it into the air for oxidation, the air flow rate is 24L / h, and the oxidation time is 4 hours; after cooling, take it out and weigh it to obtain 1114.8g of ordinary bismuth oxide powder, Bi 2 o 3 The content is greater than 99.99%.

Embodiment 2

[0049] Example 2 Preparation example of ordinary grade bismuth oxide②

[0050] Break 500g of fine bismuth blocks, and then grind them into -120 mesh 90% bismuth powder in a ball mill; then evenly scatter the bismuth powder in the stainless steel burning pan, the thickness of the bismuth powder is 6mm, and wait until the temperature of the tubular electric furnace rises to the set After 580°C, it was pushed into a tube furnace and oxidized with air, the air flow rate was 30L / h, and the oxidation time was 2 hours; after cooling, it was taken out and weighed to obtain 557.5g of ordinary bismuth oxide powder, Bi 2 o 3 The content is greater than 99.98%.

Embodiment 3

[0051] Example 3 Preparation Example of Bismuth Nitrate ①

[0052] Dissolve 61.37g of the bismuth oxide powder produced in Example 1 in 49ml of chemically pure nitric acid with a concentration of 63% (mass), react at a temperature of 75°C until the solution is clear, then cool to 20°C, and crystallize out 80.2gBi(NO 3 ) 3 ·5H 2 O, obtain mother liquor 30ml simultaneously, this mother liquor contains Bi340g / L and HNO 3 2.8mol / L, return for next use.

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Abstract

The invention relates to a method for preparing a bismuth-series chemical product, comprising steps as follows: firstly, preparing ordinary-level bismuth oxide by refined bismuth; then preparing a bismuth-series chemical product by the ordinary-level bismuth oxide including steps of refined bismuth pulverization, bismuth low-temperature oxidation, ordinary bismuth oxide chemical conversion, and the like; finally preparing bismuth-series chemical products of bismuth nitrate, bismuth subnitrate, bismuth subcarbonate, bismuthsalicylate, basic bismuth salicylate, bismuth citrate, bismuth trichlor, bismuth oxychloride, electric bismuth oxide or bismuth oxide nanowire, and the like; and recycling chemically-converted mother-liquid. The invention has the advantages of generating no cancerigenic poison gas NOx and waste water, having environment protection, little consumption of chemical reagent, little energy consumption, low cost, simple device and operation, and the like.

Description

technical field [0001] The invention relates to a method for preparing bismuth series chemical products, in particular to a method for preparing bismuth series chemical products by using refined bismuth as a raw material. Background technique [0002] The traditional method of preparing bismuth chemical products is to use refined bismuth as raw material. Except for ultrafine spherical bismuth oxide, the production of all bismuth products goes through the bismuth nitrate stage, that is, bismuth nitrate is first prepared from refined bismuth, and then bismuth nitrate is used as raw material. There are several ways to prepare bismuth oxide: [0003] ①Neutralization with sodium hydroxide [0004] 2Bi(NO 3 ) 3 +6NaOH=Bi 2 o 3 +6NaNO 3 +3H 2 o [0005] ②Carbonate precipitation: first prepare bismuth subcarbonate, then thermally decompose bismuth subcarbonate [0006] 2Bi(NO 3 ) 3 +3(NH 4 ) 2 CO 3 +1 / 2H 2 O=(BiO) 2 CO 3 1 / 2H 2 O+6NH 4 NO 3 +2CO 2 [0007] (BiO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00
Inventor 唐谟堂夏纪勇唐朝波杨建广金胜明何静杨声海鲁君乐
Owner 湖南金泰铋业股份有限公司
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