Method for recovering ruthenium from benzene hydrogenation prepared cyclohexene catalyst

A catalyst and cyclohexene technology, applied in the field of ruthenium recovery, can solve problems such as multi-organic waste water, and achieve the effects of simple operation, low production cost, and improved raw material utilization rate
CN108396145AInactive Publication Date: 2018-08-14LUXI CATALYST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LUXI CATALYST
Publication Date
2018-08-14
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention discloses a method for recovering ruthenium from a benzene hydrogenation prepared cyclohexene catalyst. The method comprises the following steps that alkali fusion treatment is carried out on the catalyst by adopting a conventional method, and thermal dissolution by adopting water is carried out; then an oxidizing agent is added to carry out distillation reaction, and the generated ruthenium tetroxide gas is absorbed by an acidic solution; and the absorption liquid is subjected to concentrated and drying to obtain a ruthenium trichloride product. According to the method, the distillation reaction liquid is returned and used for the alkali fusion heat treatment step without wastewater discharge; and excessive chlorine generated in the distillation reaction is recovered by adopting a dilute alkali liquid, and the generated hypochlorite is returned and used for distillation reaction, so that the utilization rate of raw materials is improved.
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Description

technical field

[0001] The invention relates to a method for recovering ruthenium in a catalyst for preparing cyclohexene from benzene hydrogenation, and belongs to the technical field of recovering precious metals from catalysts. Background technique

[0002] Ruthenium trichloride is one of the most important compounds of ruthenium. It can react with many reagents to form a variety of complexes. It is also the starting material for the preparation of many ruthenium complexes. It can also be used as the polymerization, isomerization, As a catalyst for hydrogenation and other reactions, ruthenium trichloride can also be used for the determination of sulfite, the manufacture of chlororuthenate, and as an electrode coating material, etc. my country's ruthenium resources are scarce, and most of them depend on imports. Ruthenium is a non-renewable resource. How to recover and recycle it from spent catalysts is of great significance for sustainable development, resource conservat...

Claims

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