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Method for preparing silver bromide and anhydrous aluminum bromide by using ethylene oxidation method and waste silver catalyst

A silver catalyst, ethylene oxidation technology, applied in the direction of aluminum bromide, aluminum halide, silver halide, etc., to achieve the effect of high purity, wide use and improving economic benefits

Inactive Publication Date: 2011-09-14
何侠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to process and comprehensively utilize the silver catalyst and its carrier waste residue to prepare silver bromide and anhydrous aluminum bromide, and to provide a method for preparing silver bromide and anhydrous aluminum bromide by using the waste silver catalyst of the ethylene oxidation method. The method of aluminum bromide, which effectively utilizes the waste silver catalyst to prepare valuable products such as silver bromide and aluminum bromide, which not only creates economic value, but also eliminates pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a kind of method for preparing silver bromide and anhydrous aluminum bromide with ethylene oxidation method waste silver catalyst described in this embodiment, comprises the steps:

[0018] Getting catalyst silver content is 15%, aluminum oxide content is 500 kilograms of waste silver catalyst and carrier waste residue thereof of 85% to prepare silver bromide and anhydrous aluminum bromide, waste silver catalyst and carrier waste residue (in terms of silver oxide) ) and nitric acid solution react in a corrosion-resistant reactor with a pure mass ratio of 1: 0.78, start the agitator, carry out a chemical reaction, and react to generate a mixed solution of silver nitrate and aluminum nitrate, filter to obtain the clarified filtrate of silver nitrate and aluminum nitrate and A small amount of impurity filter cake, send the impurity filter cake to incineration or landfill;

[0019] React the clarified filtrate of silver nitrate and aluminum nitrate obtained ab...

Embodiment 2

[0022] Embodiment 2, a kind of method for preparing silver bromide and anhydrous aluminum bromide with ethylene oxidation method waste silver catalyst described in this embodiment, comprises the steps:

[0023] Getting catalyst silver content is 15%, aluminum oxide content is 500 kilograms of waste silver catalyst and carrier waste residue thereof of 85% to prepare silver bromide and anhydrous aluminum bromide, waste silver catalyst and carrier waste residue (in terms of silver oxide) ) and nitric acid solution react in a corrosion-resistant reactor with a pure mass ratio of 1: 0.98, start the agitator, carry out a chemical reaction, and react to generate a mixed solution of silver nitrate and aluminum nitrate, filter to obtain the clarified filtrate of silver nitrate and aluminum nitrate and A small amount of impurity filter cake, send the impurity filter cake to incineration or landfill;

[0024] React the clarified filtrate of silver nitrate and aluminum nitrate obtained ab...

Embodiment 3

[0027] Embodiment 3, a kind of method described in this embodiment prepares silver bromide and anhydrous aluminum bromide with ethylene oxidation process waste silver catalyst, comprises the steps:

[0028] Getting catalyst silver content is 15%, aluminum oxide content is 500 kilograms of waste silver catalyst and carrier waste residue thereof of 85% to prepare silver bromide and anhydrous aluminum bromide, waste silver catalyst and carrier waste residue (in terms of silver oxide) ) and nitric acid solution react in a corrosion-resistant reactor with a pure mass ratio of 1: 0.58, start the agitator, carry out a chemical reaction, and react to generate a mixed solution of silver nitrate and aluminum nitrate, filter to obtain the clarified filtrate of silver nitrate and aluminum nitrate and A small amount of impurity filter cake, send the impurity filter cake to incineration or landfill;

[0029] React the clarified filtrate of silver nitrate and aluminum nitrate obtained above ...

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PUM

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Abstract

The invention provides a method for preparing silver bromide and anhydrous aluminum bromide by using an ethylene oxidation method and a waste silver catalyst. The method comprises the following steps: reacting the waste silver catalyst and carrier waste slag thereof with a saltpeter solution at a pure mass ratio of 1:(0.58-0.98) in a corrosion-resistant reactor so as to generate a solver nitrate and aluminium nitrate mixed solution, and then filtering; reacting solver nitrate and aluminium nitrate mixed filtrate with a hydrobromic acid solution at a pure mass ratio of 1:(0.28-0.68) in a corrosion-resistant reactor kettle so as to generate a silver bromide, aluminium bromide and nitric acid mixed solution, and then filtering; feeding the clear filtrate of the solver nitrate and aluminium nitrate mixed solution into a decompressed evaporimeter, concentrating, cooling, crystallizing, washing, drying, weighing and packaging, so as to respectively obtain aluminium bromide hexahydrate and silver bromide crystal products; and drying the aluminium bromide hexahydrate at the temperature of 97.5 DEG C so as to obtain the anhydrous aluminum bromide. In the method, the waste silver catalyst and the carrier waste slag thereof are used as raw materials for preparing the silver bromide and the anhydrous aluminum bromide, thereby turning waste into wealth and creating considerable economic benefits.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of waste catalysts for deep processing of petroleum organic chemical industry, in particular to a method for preparing silver bromide and anhydrous aluminum bromide by using waste silver catalysts of ethylene oxidation method. Background technique [0002] The ethylene oxidation method is that ethylene and air or oxygen are directly oxidized in the gas phase in the presence of a silver catalyst to generate ethylene oxide, which is absorbed by water in the absorption tower to form a condensed liquid, and the unoxidized ethylene is recycled back to the reactor to continue the reaction. Circular absorption until all ethylene oxide liquid is formed, and the absorption liquid is desorbed and rectified to obtain the finished product of ethylene oxide. [0003] The most important link in this oxidation reaction is to use catalyst silver to catalyze the reaction, and silver does not reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/02C01F7/64
Inventor 何侠
Owner 何侠