A waste contact material resource utilization system
By using electromagnetic powder to remove iron and fluidized bed reaction to generate materials such as trichlorosilane and silicon tetrachloride, the problem of underutilization of silicon powder in waste catalysts is solved, realizing the efficient resource utilization of silicon powder and improving the economic benefits of enterprises.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 内蒙古恒星化学有限公司
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-26
AI Technical Summary
In existing technologies, the silicon powder in waste catalysts is not fully utilized, resulting in low value, and the production process generates a large amount of industrial wastewater, causing serious pollution.
Iron is removed from waste catalyst by an electromagnetic powder separator. After being mixed with silica, it reacts with hydrogen chloride in a fluidized bed to produce materials such as trichlorosilane and silicon tetrachloride, which are used to produce silica. At the same time, copper and other metals are extracted as raw materials for copper extraction.
This approach enables the full utilization of silicon powder in waste catalysts, reduces the generation of industrial wastewater, and improves the economic benefits of enterprises.
Smart Images
Figure CN224272658U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to a waste catalyst treatment system, and more particularly to a waste catalyst resource utilization system. Background technology:
[0002] The synthesis of organosilicon monomers employs a fluidized bed reactor process. Chloromethane and silicon powder react in a fluidized bed at 280–320°C in the presence of a copper catalyst, zinc, and tin co-catalysts to produce crude methylchlorosilane monomers. The fluidized bed reaction is cyclical, with each cycle lasting 7–120 days depending on the process. Because the silicon powder contains metals such as iron, aluminum, calcium, titanium, nickel, and lead, to prevent the accumulation of these metals in the fluidized bed reactor and the resulting decrease in the selectivity of the main product, a portion of the reacted fine silicon powder needs to be discharged. This discharged silicon powder contains not only the aforementioned metals but also copper, zinc, and tin; this portion is called waste catalyst. The production of waste catalyst is approximately 0.2–0.3% of the monomer production. Of this, approximately 200,000 tons of crude monomer are produced annually, with waste catalyst production ranging from approximately 400 to 600 tons.
[0003] Waste silicates are classified as hazardous waste, but they are also a valuable resource. Currently, most individual silicate plants in China treat discharged waste silicates by soaking them in hydrochloric acid or sulfuric acid (with the addition of oxidants) to convert the metals into metal chloride salts or metal sulfates dissolved in the solution, achieving solid-liquid separation. Iron powder is then added for reduction, displacing metals such as copper, nickel, and lead from the solution for sale. The solid silica powder is then washed multiple times to become general solid waste or a byproduct for sale. This process generates a large amount of wastewater. Although it recovers metals such as copper and converts hazardous waste into general solid waste, it produces a large amount of industrial wastewater, adding new pollutants. Furthermore, the silica powder in the waste silicates is only used as silica sol and building materials, with very low value. Therefore, how to fully utilize the silica powder in waste silicates and maximize its value has become a real problem for the entire organosilicon industry. Utility Model Content:
[0004] The purpose of this utility model is to provide a waste catalyst resource utilization system with a simple connection structure, which fully realizes the utilization of silicon powder in waste catalysts and improves the economic benefits of enterprises.
[0005] This utility model is implemented by the following technical solution: The purpose of this patent is to provide a waste catalyst resource utilization system, which includes a waste catalyst storage tank, an electromagnetic powder iron remover, a silica storage tank, a mixer, a fluidized bed, a nitrogen pipeline, and a hydrogen chloride pipeline; the outlet of the waste catalyst storage tank is connected to the inlet of the electromagnetic powder iron remover, the outlet of the electromagnetic powder iron remover and the outlet of the silica storage tank are both connected to the inlet of the mixer, the outlet of the mixer is connected to the inlet of the fluidized bed, and the outlets of the nitrogen pipeline and the hydrogen chloride pipeline are both connected to the inlet of the fluidized bed.
[0006] Furthermore, it also includes a sintered plate filter, a gas condenser, and a receiving tank. The gas outlet of the fluidized bed is connected to the gas inlet of the sintered plate filter, the gas outlet of the sintered plate filter is connected to the gas inlet of the gas condenser, and the liquid outlet of the gas condenser is connected to the liquid inlet of the receiving tank.
[0007] Furthermore, the outlets of both the fluidized bed and the sintered plate filter are connected to the inlet of the collection silo.
[0008] Advantages of this invention: The connection structure of this invention is simple and easy to implement. First, the iron in the waste catalyst is removed by an electromagnetic powder iron remover. Then, it is mixed with silicon dioxide and sent to a fluidized bed. Hydrogen chloride is introduced to react, effectively reacting the silicon powder in the waste catalyst to generate trichlorosilane, silicon tetrachloride and other materials for the production of silica, thus realizing the full utilization of silicon powder in the waste catalyst. The copper and other metal content in the remaining waste catalyst is greatly increased, which can be used as raw material for copper extraction and sold directly, avoiding the generation of a large amount of industrial wastewater and increasing the economic benefits of enterprises. Attached image description:
[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0011] Waste catalyst storage tank 1, electromagnetic powder iron remover 2, silica storage tank 3, mixer 4, fluidized bed 5, nitrogen pipeline 6, hydrogen chloride pipeline 7, sintered plate filter 8, gas condenser 9, receiving tank 10, collection silo 11. Detailed implementation method:
[0012] Example: Figure 1 As shown, a waste catalyst resource utilization system includes a waste catalyst storage tank 1, an electromagnetic powder iron separator 2, a silica storage tank 3, a mixer 4, a fluidized bed 5, a nitrogen pipeline 6, a hydrogen chloride pipeline 7, a sintered plate filter 8, a gas condenser 9, and a receiving tank 10. The outlet of the waste catalyst storage tank 1 is connected to the inlet of the electromagnetic powder iron separator 2. The outlets of the electromagnetic powder iron separator 2 and the silica storage tank 3 are both connected to the inlet of the mixer 4. The outlet of the mixer 4 is connected to the inlet of the fluidized bed 5. The outlets of the nitrogen pipeline 6 and the hydrogen chloride pipeline 7 are both connected to the inlet of the fluidized bed 5.
[0013] The outlet of the fluidized bed 5 is connected to the inlet of the sintered plate filter 8, the outlet of the sintered plate filter 8 is connected to the inlet of the gas condenser 9, the outlet of the gas condenser 9 is connected to the inlet of the receiving tank 10, and the outlets of both the fluidized bed 5 and the sintered plate filter 8 are connected to the inlet of the collection silo 11.
[0014] Working principle: Waste contact material is sent to electromagnetic powder separator 2 for iron removal. The iron in the waste contact material is extracted, and the waste contact material after iron removal is used for later use. Silica particles with a certain particle size distribution are added to mixer 4 in a certain amount and mixed. After mixing, the mixture is loaded into fluidized bed 5. Silica acts as a particle size adjuster and anti-agglomeration agent to prevent fine silica powder from agglomerating.
[0015] Next, nitrogen gas is introduced into the fluidized bed 5 at a controlled flow rate to maintain the fluidized bed 5 in a bubbling fluidized state. Electric heating is turned on outside the fluidized bed 5 to raise the temperature of the material in the fluidized bed 5 to 250-260℃. Then, the nitrogen gas is stopped and high-purity hydrogen chloride gas is introduced to carry out the reaction. After the reaction has been carried out for a certain period of time, the hydrogen chloride gas is stopped and nitrogen gas is introduced to cool down.
[0016] The gas generated by the fluidized bed 5 reaction is filtered by the sintering plate filter 8 and then passes through the gas condenser 9 to form liquids such as trichlorosilane and silicon tetrachloride, which are stored in the receiving tank 10 for the production of silica, thus realizing the full utilization of silicon powder in the waste catalyst.
[0017] The reacted material in fluidized bed 5 is discharged from it. Since most of the silicon powder in the waste catalyst reacts to produce materials such as trichlorosilane and silicon tetrachloride, the copper and other metal content in the remaining waste catalyst is greatly increased. It can be used as a raw material for copper extraction and sold directly, avoiding the generation of a large amount of industrial wastewater and increasing the economic benefits of the enterprise.
[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A system for resource utilization of spent catalysts, characterized by, It includes a waste catalyst storage tank, an electromagnetic powder separator, a silica storage tank, a mixer, a fluidized bed, a nitrogen pipeline, and a hydrogen chloride pipeline; the outlet of the waste catalyst storage tank is connected to the inlet of the electromagnetic powder separator, the outlets of the electromagnetic powder separator and the silica storage tank are both connected to the inlet of the mixer, the outlet of the mixer is connected to the inlet of the fluidized bed, and the outlets of the nitrogen pipeline and the hydrogen chloride pipeline are both connected to the inlet of the fluidized bed.
2. The spent catalyst resource utilization system according to claim 1, wherein It also includes a sintered plate filter, a gas condenser, and a receiving tank. The gas outlet of the fluidized bed is connected to the gas inlet of the sintered plate filter, the gas outlet of the sintered plate filter is connected to the gas inlet of the gas condenser, and the liquid outlet of the gas condenser is connected to the liquid inlet of the receiving tank.
3. The spent catalyst resource utilization system according to claim 2, wherein The outlets of both the fluidized bed and the sintered plate filter are connected to the inlet of the collection silo.