Unlock instant, AI-driven research and patent intelligence for your innovation.
A method for recovering metals from spent catalysts containing zinc, copper, cobalt and nickel
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A waste catalyst and active metal technology, applied in the field of catalyst recovery, can solve the problems of low metal purity, waste of non-ferrous metal resources, low recovery rate, etc.
Active Publication Date: 2019-03-19
中节能铁汉盖雅(北京)环境科技有限公司 +1
View PDF2 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0002] A large number of catalysts are used in the petrochemical production process, among which the commonly used catalysts are zinc-copper-cobalt-nickel catalysts, in which zinc (Zn) is used as the carrier of the catalyst, and copper (Cu), nickel (Ni), and cobalt (Co) are catalysts. The main active component of the catalyst can no longer be used after the catalyst loses its activity. At present, the waste catalyst is usually directly landfilled, incinerated or discarded. However, the spent catalyst contains a large amount of metal substances. Direct landfill, incineration or disposal will not only cause great harm to the natural environment. Great impact, but also cause waste of non-ferrous metal resources
[0003] The current method of recovering metals is generally to extract metal elements from spent catalysts by acid leaching or alkali leaching, but the metals obtained by this recovery method have low purity and low recovery rate
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0072] 1000 g of spent catalysts containing zinc, copper, cobalt and nickel were pulverized to below 120 mesh using a pulverizer, and the pulverized catalyst was placed in a muffle furnace at 1000°C for calcination for 5 hours and then cooled to room temperature to obtain a heat-treated spent catalyst;
[0073] Use 10mol / L NaOH solution to carry out alkali leaching to the waste catalyst after heat treatment, the volume ratio of the waste catalyst mass to NaOH solution is 100g:1L, react under stirring conditions, the reaction temperature is 80 °C, and the reaction time is 5h, to obtain Alkali leaching solution and alkali leaching residue. It can be detected that the leaching rate of Zn after alkali leaching is 99%.
[0074] The resulting alkaline leaching solution is Na 2 ZnO 2 Solution, using the electrolysis method to prepare Zn simple substance, the electrolysis conditions are: electrolysis temperature is 50 °C, electrolysis time is 35min, OH - The concentration is 4mol / L...
Embodiment 2
[0081] 5000 g of spent catalysts containing zinc, copper, cobalt, and nickel were pulverized to below 120 mesh using a pulverizer, and the pulverized catalyst was calcined in a muffle furnace at 900°C for 3 hours, and then cooled to room temperature to obtain a heat-treated spent catalyst;
[0082] Use 5mol / L KOH solution to carry out alkali leaching on the waste catalyst after heat treatment, the volume ratio of the waste catalyst mass to NaOH solution is 50g:1L, and the reaction is carried out under stirring conditions, the reaction temperature is 50°C, and the reaction time is 2h. Alkali leaching solution and alkali leaching residue. It can be detected that the leaching rate of Zn after alkaline leaching is 95%.
[0083] The resulting alkaline leaching solution is Na 2 ZnO 2 Solution, using the electrolysis method to prepare Zn simple substance, the electrolysis conditions are: the electrolysis temperature is 30°C, the electrolysis time is 25min, OH - The concentration is ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
saponification
aaaaa
aaaaa
Login to View More
Abstract
The invention provides a method for recovering metals from waste catalysts containing zinc, copper, cobalt and nickel. The method provided by the invention removes copper from waste catalysts by means of heat treatment, alkali leaching, acid leaching, extraction and stripping. , zinc, cobalt and nickel are gradually separated, and then recycled. Finally, copper is recovered in the form of copper sulfide, cobalt is recovered in the form of cobalt salt, and zinc and nickel are recovered in the form of simple metals. The recovery rate is high and the resulting products are of high purity. The results of the examples show that the recovery rate of copper in the method provided by the invention is 93-95%, and the purity of the obtained copper sulfide is 99-99.9%; the recovery rate of zinc is 96-99%, and the purity of zinc is as high as 99%-99.9%; The recovery rate is 96-98%, the cobalt salt product purity is 99-99.9%; the nickel recovery rate is 95-98%, and the elemental nickel purity is 99-99.9%.
Description
technical field [0001] The invention relates to the technical field of catalyst recovery, in particular to a method for recovering metals from spent catalysts containing zinc, copper, cobalt and nickel. Background technique [0002] A large number of catalysts are used in the petrochemical production process, among which the commonly used catalysts are zinc-copper-cobalt-nickel catalysts, in which zinc (Zn) is used as the carrier of the catalyst, and copper (Cu), nickel (Ni), and cobalt (Co) are catalysts. The main active component of the catalyst can no longer be used after the catalyst loses its activity. At present, the waste catalyst is usually directly landfilled, incinerated or discarded. However, the spent catalyst contains a large amount of metal substances. Direct landfill, incineration or disposal will not only cause great harm to the natural environment. Large impact, but also cause waste of non-ferrous metal resources. [0003] The current metal recovery method ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More