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Method for synthesizing bismuth subnitrate and bismuth aluminate

A bismuth subnitrate and synthesis method technology, applied in bismuth compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as no public reports, and achieve the effects of reducing energy consumption, high conversion rate of bismuth, and increasing reaction speed

Inactive Publication Date: 2010-07-14
云南云铜稀贵新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Through document retrieval, do not see the public report identical with the present invention

Method used

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  • Method for synthesizing bismuth subnitrate and bismuth aluminate
  • Method for synthesizing bismuth subnitrate and bismuth aluminate

Examples

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Embodiment 1

[0031] Add 5Kg of metal bismuth particles with a particle size of 5 mm in a 50-liter pressure vessel, 16.7 liters of 30% industrial nitric acid, pass cooling water to control the temperature at 140° C., pressure at 1.0 MPa, and the reaction time for 1.5 hours. After the reaction, the liquid and solid were separated to obtain 0.5 Kg of the reaction residue and 17 liters of the intermediate product bismuth nitrate solution. The composition of the reaction intermediate product bismuth nitrate solution is: free nitric acid 8%, bismuth 254g / L, iron 0.0008g / L, lead 0.005g / L. Add 4.5Kg of metal bismuth particles to the reaction residue, return 16.7 liters of 30% industrial nitric acid to the pressure vessel, control the mass ratio of metal bismuth to nitric acid to be 1.0, react under the above reaction conditions, and add nitric acid and metal bismuth to return the reaction residue after the reaction , and back and forth. The intermediate product bismuth nitrate solution produced b...

Embodiment 2

[0033] Add 10Kg of metal bismuth grains with a particle size of 10 mm, 11.7 liters of 60% industrial nitric acid in a 50-liter pressure vessel, pass cooling water to control the temperature at 170° C., pressure at 1.6 MPa, and the reaction time for 1.0 hour. After the reaction was finished, the liquid and solid were separated to obtain 0.5 Kg of the reaction residue and 12 liters of the intermediate product bismuth nitrate solution. The composition of the reaction intermediate product bismuth nitrate solution is: free nitric acid 2%, bismuth 790g / L, iron 0.0005g / L, lead 0.003g / L. Reaction residue replenishes metal bismuth particles 9.5Kg, 11.7 liters of 60% industrial nitric acid returns to the pressure vessel, controls the mass ratio of metal bismuth to nitric acid to be 0.7, reacts under the above reaction conditions, and the residue after the reaction supplements nitric acid and metal bismuth to return to the reaction , and back and forth. The intermediate product bismuth ...

Embodiment 3

[0035] Basically with embodiment 1. The difference is:

[0036] In the preparation of the intermediate product bismuth nitrate: metal bismuth particle size is 8 millimeters, nitric acid concentration is 60%, nitric acid addition is 5.83 liters, metal bismuth and nitric acid mass ratio are 1: 0.7, reaction temperature 170 ℃, reaction pressure 1.6Mpa, reaction After 1.0 hour, 0.65 Kg of the reaction residue and 5.5 liters of the intermediate product bismuth nitrate solution were obtained.

[0037] In the preparation of the bismuth subnitrate product: add sodium hydroxide to neutralize, add sodium hydroxide to neutralize the end point pH value 2.0, the addition of liquid dispersant ethanol is 1% of product weight, obtain 6.3 kilograms of bismuth subnitrate product.

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Abstract

The invention relates to a method for synthesizing bismuth subnitrate (BiNO3.H2O) and bismuth aluminate (Bi2 (Al2O4)3.10H2O), which belongs to the technical field of synthesizing abiochemical product bismuth salt. The method of the invention comprises the following steps: adding bismuth metal and nitric acid into a pressure vessel and leading the bismuth metal to react with the nitric acid to produce a semifinished product bismuth nitrate; adding sodium hydroxide into the semifinished product bismuth nitrate so as to neutralize, washing, dewatering by adding a dispersing agent, and drying to obtain a bismuth subnitrate product; and adding sodium metaaluminate into the semifinished product bismuth nitrate so as to react, washing, dewatering by adding the dispering agent, and drying to obtain a bismuth aluminate product. The method for synthesizing the bismuth subnitrate and the bismuth aluminate has the advantages that the reacting time is shortened, the conversion rate of bismuth is high, and the nitric acid consumption is decreased by more than 40%; since the heat energy and gas produced in the reaction are utilized, the reacting speed is quickened, no external heating is needed, the energy consumption of product production is lowered, and the problem of nitrogen dioxide gas absorbing treatment is solved, thus the method of the invention belongs to a high-efficient environmental-friendly process.

Description

Technical field: [0001] The present invention relates to a kind of bismuth subnitrate (BiONO 3 ·H 2 O), bismuth aluminate (Bi 2 (Al 2 o 4 ) 3 10H 2 (2) The synthetic method belongs to the synthetic technical field of inorganic chemical product bismuth salt. Background technique: [0002] Bismuth subnitrate can be used in the fields of medicine, ceramics, cosmetics and bismuth salts respectively. The efficacy of bismuth subnitrate in these fields has been published. The traditional wet production method is to use metal bismuth and concentrated nitric acid to directly react to produce the intermediate product bismuth nitrate, and release a large amount of nitrogen dioxide gas at the same time. Add alkali or sodium aluminate to the intermediate product to synthesize bismuth subnitrate and bismuth aluminate. The main process is: use refined bismuth as raw material, crush it into small pieces, put it in a reaction vessel and add concentrated nitric acid to react violentl...

Claims

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Application Information

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IPC IPC(8): C01G29/00
Inventor 尤西林徐勇志王维昌纳俊刚
Owner 云南云铜稀贵新材料有限公司
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