Method for preparing bismuth-series chemical product

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...