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Method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst in ethane oxidation

A silver catalyst, ethylene oxidation technology, applied in chemical instruments and methods, aluminum nitrate, solid waste removal, etc., to achieve the effects of improving economic benefits, avoiding secondary pollution, and wide application

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 nitrate and aluminum nitrate hexahydrate, and provide a method for preparing silver nitrate and aluminum nitrate hexahydrate with the waste silver catalyst of ethylene oxidation method method, which effectively utilizes the waste silver catalyst to prepare valuable products such as silver nitrate and aluminum nitrate, 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

[0013] Embodiment 1, a kind of method described in the present embodiment prepares silver nitrate and aluminum nitrate hexahydrate with ethylene oxidation process waste silver catalyst, comprises the steps:

[0014] 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 nitrate and aluminum nitrate hexahydrate, waste silver catalyst and carrier waste residue (in terms of silver oxide) and The nitric acid solution is reacted in a corrosion-resistant reactor with a pure mass ratio of 1:0.78, the agitator is started, a chemical reaction is carried out, and the reaction generates a mixed solution of silver nitrate and aluminum nitrate, and a clear filtrate and a small amount of silver nitrate and aluminum nitrate are obtained by filtration. Impurity filter cake, send the impurity filter cake to incineration or landfill;

[0015] The clarified filtrate of silver nitrate and ...

Embodiment 2

[0017] Embodiment 2, a kind of method described in the present embodiment prepares silver nitrate and aluminum nitrate hexahydrate with ethylene oxidation process waste silver catalyst, 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 nitrate and aluminum nitrate hexahydrate, waste silver catalyst and carrier waste residue (in terms of silver oxide) and The nitric acid solution is reacted in a corrosion-resistant reactor with a pure mass ratio of 1:0.98, the agitator is started, a chemical reaction is carried out, and the reaction generates a mixed solution of silver nitrate and aluminum nitrate, and a clear filtrate and a small amount of silver nitrate and aluminum nitrate are obtained by filtration. Impurity filter cake, send the impurity filter cake to incineration or landfill;

[0019] The clarified filtrate of silver nitrate and ...

Embodiment 3

[0021] Embodiment 3, a kind of method described in the present embodiment prepares silver nitrate and aluminum nitrate hexahydrate with ethylene oxidation process waste silver catalyst, comprises the steps:

[0022] 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 nitrate and aluminum nitrate hexahydrate, waste silver catalyst and carrier waste residue (in terms of silver oxide) and The nitric acid solution is reacted in a corrosion-resistant reactor with a pure mass ratio of 1:0.58, and the agitator is started to carry out a chemical reaction, which generates a mixed solution of silver nitrate and aluminum nitrate, and is filtered to obtain a clear filtrate of silver nitrate and aluminum nitrate and a small amount of Impurity filter cake, send the impurity filter cake to incineration or landfill;

[0023] The clarified filtrate of silver nitrate and aluminum nitr...

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PUM

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Abstract

A method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst in ethane oxidation comprises the following steps: allowing waste silver catalysts and carrier waste residues thereof to react with a nitric acid solution with a pure mass ratio of 1:0.58-0.98 in a corrosion-resistant reactor to generate a mixed solution of silver nitrate and aluminum nitrate, filtering to obtain a clarified filtrate of silver nitrate and aluminum nitrate and a small amount of impurity filter cakes; feeding the clarified filtrate of silver nitrate and aluminum nitrate into a reduced-pressure distiller for reduced pressure distillation, concentrating the filtrate to obtain a saturated solution, discharging the solution, performing cooling and crystallization separation to firstly precipitating silver nitrate and subsequently aluminum nitrate nonahydrate crystals, then washing and drying to obtain products of aluminum nitrate nonahydrate crystals and silver nitrate; heating the obtained aluminum nitrate nonahydrate crystals in an oven to 70 DEG C for drying, cooling and packaging to obtain an aluminum nitrate hexahydrate product. The invention prepares silver nitrate and aluminum nitrate hexahydrate by using waste silver catalysts and carrier waste residues thereof as raw materials, changes waste into valuables, and creates considerable economic benefit.

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 nitrate and aluminum nitrate hexahydrate 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 re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/00C01F7/66B09B3/00
Inventor 何侠
Owner 何侠