CN115433841A - Method for recycling waste mercury catalyst - Google Patents
Method for recycling waste mercury catalyst Download PDFInfo
- Publication number
- CN115433841A CN115433841A CN202211062705.7A CN202211062705A CN115433841A CN 115433841 A CN115433841 A CN 115433841A CN 202211062705 A CN202211062705 A CN 202211062705A CN 115433841 A CN115433841 A CN 115433841A
- Authority
- CN
- China
- Prior art keywords
- mercury
- waste
- catalyst
- recycling
- mercury catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B43/00—Obtaining mercury
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of industrial waste recycling treatment, and particularly discloses a method for recycling a waste mercury catalyst, which comprises the following steps: adding a mixed solution consisting of hydrochloric acid and dodecylphenol polyoxyethylene ether into the waste mercury catalyst, and stirring at 40 to 60 ℃ for 0.5 to 2h; adding quick lime, stirring at 60 to 80 ℃ for 2 to 5h, aging for 24 to 48h, and removing water to obtain a pretreatment material; putting the pretreated material into a distillation furnace, and distilling at 700-800 ℃ to obtain mercury vapor; condensing the mercury vapor by a condensing system to obtain elemental mercury; treating the mercury-containing tail gas; adding a treating agent into the mercury-containing wastewater, stirring, and standing for precipitation. The method for recycling the waste mercury catalyst treats the waste mercury catalyst, removes some impurity deposits deposited on the surface and in the pore channel of the waste mercury catalyst, promotes the reaction of the mercury chloride of the waste mercury catalyst and the calcium hydroxide to convert the mercury chloride into mercury oxide, thereby improving the recovery rate of the mercury, reducing the mercury content in the slag and reducing the pollution of the waste mercury catalyst to the environment.
Description
Technical Field
The invention belongs to the technical field of industrial waste recycling and treatment, and particularly relates to a method for recycling a waste mercury catalyst.
Background
The mercuric chloride catalyst is a catalyst for synthesizing Vinyl Chloride (VCM) by acetylene and hydrogen chloride gas in polyvinyl chloride production by a calcium carbide method, and is prepared by taking active carbon as a carrier and mercuric chloride as an active substance and loading the mercuric chloride on the surface of the active carbon. After the mercury catalyst is used for a certain time, the mercury chloride is sublimated at high temperature, so that the content of the mercury chloride is greatly reduced; the phosphor and sulfur in the raw material gas poisons the mercury catalyst; the mercury catalyst is difficult to be effectively catalyzed due to the reason that impurities in the production raw materials cover the surface of the catalyst or block catalyst channels, and the like, so that the waste mercury catalyst which needs to be replaced generally contains about 2-5% of mercury chloride. Because mercuric chloride is extremely toxic and volatile, the replaced mercury catalyst is easy to cause environmental pollution and potential safety hazard if stacked or stored for a long time. With the further development of the polyvinyl chloride industry in China, the usage amount of the mercuric chloride catalyst is further increased, and the generation amount of the waste mercuric catalyst is increased. Therefore, the waste mercury catalyst is efficiently recycled, so that the mercury can be prevented from entering the environment to cause harm to human health, and the economic benefit is achieved.
The existing method for recycling the waste mercury catalyst mainly comprises a double salt method and a high-temperature method distillation method, wherein the double salt method adopts NaCl to treat the waste mercury catalyst in the presence of hydrochloric acid to ensure that HgCl 2 Formation of Na2HgCl 4 Eluting the double salt, reducing the double salt into metallic mercury by formaldehyde, and recovering; the process is easy to operate, has low equipment requirement, but can only recover 60 percent of HgCl 2 In the presence of HgCl 2 Low recovery rate. The high-temperature distillation method comprises the steps of firstly, chemically pretreating the waste mercury catalyst by using quicklime and water, and reacting HgCl with calcium hydroxide 2 Converting the mercury into mercury oxide, then placing the mercury oxide in a metal can, heating the mercury oxide to 700-800 ℃ to decompose the mercury oxide into mercury vapor, and then condensing the mercury vapor to recover the metal mercury; compared with a double salt method, the method is used for treating HgCl 2 The recovery rate is relatively high, but impurity deposits are deposited on the surface and in the pore channels of the waste mercury catalyst to prevent the mercury chloride from reacting with the calcium hydroxide and converting into mercury oxide, so that the recovery rate of mercury after the comprehensive treatment of the waste mercury catalyst is not high, the mercury content of waste residues formed after the recovery and the utilization is still more, and in addition, the mercury content in the treated waste gas and waste water is also more, so that the mercury content is exposed to the environment, and the environmental pollution is easily caused.
Disclosure of Invention
The invention aims to provide a method for recycling a waste mercury catalyst, which improves the recycling of mercury in the waste mercury catalyst, reduces the content of mercury in treated tail gas and waste water, and reduces the pollution rate to the environment.
In order to achieve the aim, the invention provides a method for recycling waste mercury catalyst, which comprises the following steps:
(1) Adding 2 to 4 times of mixed liquid consisting of hydrochloric acid and dodecylphenol polyoxyethylene ether into the waste mercury catalyst, and stirring at 40 to 60 ℃ for 0.5 to 2h; adding quicklime with the weight 2-5 times of the weight of the waste mercury catalyst, stirring at 60-80 ℃ for 2-5h, aging at 24-48h, and removing water to obtain a pretreatment material;
(2) Putting the pretreated material obtained in the step (1) into a distillation furnace, and distilling at 700-800 ℃ to obtain mercury vapor and furnace slag; condensing the mercury vapor through an air cooler and a multi-tube condenser condensing system to obtain elemental mercury;
(3) Treating mercury-containing tail gas: treating the mercury-containing tail gas by a mercury-containing tail gas treatment system, wherein the mercury-containing tail gas treatment system comprises washing tower treatment, five-stage adsorption bed adsorption, spray tower treatment and eight-stage adsorption bed adsorption;
(4) Wastewater treatment: treating the wastewater generated in the pretreatment process and the wastewater generated in the condensation purification and mercury-containing tail gas treatment processes, adding a treating agent into the wastewater, stirring, and standing for precipitation.
Preferably, in the method for recycling the waste mercury catalyst, in the step (1), the mass percentage concentration of the hydrochloric acid in the mixed solution is 2 to 8%, and the addition amount of the dodecylphenol polyoxyethylene ether is 0.005 to 0.02% of the mass of the hydrochloric acid. The addition of a proper amount of the dodecyl phenol polyoxyethylene ether is beneficial to the adsorption of hydrogen ions on the waste mercury catalyst, effectively removes impurities deposited by the activated carbon, exposes and separates the mercuric chloride, promotes the contact reaction of the mercuric chloride in the waste mercury catalyst and the calcium hydroxide, improves the conversion rate of the mercuric oxide, and further improves the recovery rate of the mercury.
Preferably, in the method for recycling the waste mercury catalyst, the distillation treatment time is 5 to 10h.
Preferably, in the method for recycling the waste mercury catalyst, in the step (3), the five-stage adsorption bed and the eight-stage adsorption bed are adsorbed by activated carbon, and the potassium permanganate solution is sprayed for treatment by a spray tower.
Preferably, in the method for recycling the waste mercury catalyst, in the step (4), the treating agent is a soybean meal adsorbing material, and the preparation method of the soybean meal adsorbing material includes the following steps:
s1, adding a sodium hydroxide solution and coco-glucoside into soybean meal powder with the particle size of 100-300 meshes, mixing uniformly to obtain a mixed material, stirring at 40-60 ℃ for 5-10h, and cooling to room temperature to obtain a pretreatment mixed material;
s2, adding carbon disulfide into the pretreated mixed material, stirring and reacting for 3 to 5 hours at the temperature of 20 to 40 ℃, filtering, washing and drying to obtain the bean pulp adsorbing material.
The bean pulp is a green and safe agricultural waste, has the advantages of easily obtained raw materials and low price, contains a large amount of active groups such as carboxyl, hydroxyl, amino and the like, has a certain adsorbability after a small amount of active groups are exposed outside, but does not expose more active groups in the bean pulp, and can expose more active groups such as carboxyl, hydroxyl and amino in the bean pulp by treating the bean pulp with a sodium hydroxide solution, so that the adsorption of mercury is improved; and then adding carbon disulfide, reacting with the soybean meal under an alkaline condition, and introducing dithiocarboxylic acid groups on the soybean meal, so that mercury can be efficiently chelated, flocculated and deposited, and mercury can be removed.
Preferably, in the method for recycling the waste mercury catalyst, the concentration of the sodium hydroxide solution is 0.5 to 1.2mol/L, and the volume ratio of the mass of the soybean meal powder to the volume of the sodium hydroxide solution is 1g.
Preferably, in the method for recycling the waste mercury catalyst, the addition amount of the coco glucoside accounts for 0.08 to 0.15 percent of the weight of the mixed material. The coco glucoside is added into the mixture, so that the treatment efficiency and effect of the chemical agent on the soybean meal powder particles can be enhanced, and the mercury removal rate of the soybean meal adsorbing material can be improved.
Preferably, in the method for recycling the waste mercury catalyst, the addition amount of the carbon disulfide is 8 to 15 percent of the weight of the soybean meal powder.
Preferably, in the method for recycling the waste mercury catalyst, the addition amount of the treating agent is 0.3-2g/L.
Preferably, in the method for recycling the waste mercury catalyst, in the step (4), the stirring speed is 50 to 150r/min, the stirring time is 10 to 60min, and the waste mercury catalyst is kept standing and precipitated for 1 to 5h.
Compared with the prior art, the invention has the following beneficial effects:
1. the method for recycling the waste mercury catalyst comprises the steps of firstly treating the waste mercury catalyst by hydrochloric acid and dodecyl phenol polyoxyethylene ether, removing some impurity deposits deposited on the surface and in a pore channel of the waste mercury catalyst, exposing and separating out mercuric chloride of the waste mercury catalyst, facilitating the reaction of the mercuric chloride of the waste mercury catalyst and calcium hydroxide to convert the mercuric chloride into mercuric oxide, improving the conversion rate of the mercuric chloride into the mercuric oxide, and distilling the mercuric oxide to recover simple substance mercury, thereby improving the recovery rate of mercury, reducing the mercury content in furnace slag and reducing the environmental pollution of the waste mercury catalyst.
2. According to the method for recycling the waste mercury catalyst, the tail gas is purified by adopting treatment procedures such as multistage activated carbon adsorption and potassium permanganate spraying treatment, the mercury content of the purified tail gas is lower than the standard discharge amount, and the environmental pollution is favorably reduced; the activated carbon with saturated adsorption can be regenerated and recycled.
3. According to the method for recycling the waste mercury catalyst, the bean pulp adsorbing material is adopted to treat the mercury-containing wastewater generated by recycling the waste mercury catalyst, so that mercury in the wastewater can be efficiently chelated, adsorbed and precipitated, the bean pulp adsorbing material adsorbing mercury is treated and recycled by furnace distillation, the bean pulp adsorbing material is decomposed and volatilized without residue, and secondary pollution is avoided. The raw materials of the bean pulp adsorbing material are easy to obtain, the cost is low, the green and safe effects are achieved, and the treatment efficiency is high.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Example 1
A method for recycling waste mercury catalyst comprises the following steps:
(1) Putting the waste mercury catalyst into a pretreatment tank, and adding 3 times of mixed solution consisting of hydrochloric acid and dodecylphenol polyoxyethylene ether into the waste mercury catalyst, wherein the mass percentage concentration of the hydrochloric acid is 5%, and the adding amount of the dodecylphenol polyoxyethylene ether is 0.01% of the mass of the hydrochloric acid; stirring at 50 deg.C for 1h; adding quicklime with the weight 3 times that of the waste mercury catalyst, and stirring at 80 ℃ for 3 hours; aging for 24h, and removing water to obtain a pretreated material;
(2) Putting the pretreated material obtained in the step (1) into a vertical distillation furnace, sealing the distillation furnace after the material feeding is finished, and carrying out distillation treatment at 800 ℃ for 8h to decompose oxidized mercury in the material in the distillation furnace into mercury vapor at high temperature, wherein the mercury vapor enters a condensation system to collect mercury products, and the distilled furnace slag is treated as general industrial waste; the mercury vapor generated by the distillation furnace is condensed by adopting 'air cooling + multi-tube condenser', the mercury vapor firstly enters an air cooler for indirect condensation to ensure that most of the mercury vapor is rapidly condensed in a condensation system to form liquid metal mercury, then enters a mercury collecting box at the lower part for storage, and is periodically canned and put in storage to form a metal mercury finished product; then the mercury vapor is condensed by a multi-tube condenser to obtain liquid metal mercury which enters a lower mercury collecting tank and is periodically canned and put in storage to form a metal mercury finished product; the tail gas treated by the condensing system also contains a small amount of mercury vapor, and is further purified;
(3) Treating mercury-containing tail gas: treating the mercury-containing tail gas by a mercury-containing tail gas treatment system, wherein the mercury-containing tail gas treatment system comprises a washing tower treatment device, a multi-stage tail gas treatment device, a five-stage activated carbon adsorption bed adsorption device, a potassium permanganate spray tower treatment device and an eight-stage activated carbon adsorption bed adsorption treatment device, and the mercury content of the treated tail gas is less than 0.01mg/m 3 ；
(4) Wastewater treatment: treating wastewater generated in the pretreatment process and wastewater in the condensation purification and mercury-containing tail gas treatment processes, adding 0.5g/L of soybean meal adsorbing material into a wastewater pool filled with the wastewater, stirring for 30min under the condition that the stirring speed is 100r/min, standing and precipitating for 2h, obtaining purified water as supernate, wherein the mercury content in the purified water is lower than 0.005mg/L, and meeting the emission standard. Collecting the precipitate for treatment, returning to the furnace, and collecting and recovering mercury.
The preparation method of the bean pulp adsorbing material comprises the following steps:
s1, adding a sodium hydroxide solution and coco-glucoside into soybean meal powder with the particle size of 100-300 meshes, uniformly mixing to obtain a mixed material, wherein the concentration of the sodium hydroxide solution is 1.0mol/L, the volume ratio of the mass of the soybean meal powder to the volume of the sodium hydroxide solution is 1g to 12ml, and the addition amount of the coco-glucoside accounts for 0.1% of the weight of the mixed material; stirring at 50 ℃ for 8h, and cooling to room temperature to obtain a pretreated mixed material;
s2, adding carbon disulfide accounting for 12% of the weight of the soybean meal powder into the pretreated mixed material, stirring and reacting for 4 hours at the temperature of 30 ℃, filtering, washing and drying to obtain the soybean meal adsorbing material.
In this embodiment, the recovery rate of mercury from the treatment of the waste mercury catalyst is 99.75%, and the mercury content in the treated tail gas is less than 0.01mg/m 3 。
Example 2
A method for recycling waste mercury catalyst comprises the following steps:
(1) Putting the waste mercury catalyst into a pretreatment tank, adding 3 times of mixed solution consisting of hydrochloric acid and dodecylphenol polyoxyethylene ether into the waste mercury catalyst, wherein the mass percentage concentration of the hydrochloric acid is 6%, and the adding amount of the dodecylphenol polyoxyethylene ether is 0.008% of the mass of the hydrochloric acid; stirring at 50 deg.C for 1h; adding quicklime with the weight 3 times that of the waste mercury catalyst, and stirring at 80 ℃ for 3.5 hours; aging for 24h, and removing water to obtain a pretreated material;
(2) Putting the pretreated material obtained in the step (1) into a vertical distillation furnace, sealing the distillation furnace after the material feeding is finished, and carrying out distillation treatment at 800 ℃ for 8h to decompose oxidized mercury in the material in the distillation furnace into mercury vapor at high temperature, wherein the mercury vapor enters a condensation system to collect mercury products, and the distilled furnace slag is treated as general industrial waste; the mercury vapor generated by the distillation furnace enters condensation treatment by adopting 'air cooling and multi-pipe condenser', the mercury vapor enters an air cooler for indirect condensation to ensure that most of the mercury vapor is rapidly condensed in a condensation system to form liquid metal mercury, then the liquid metal mercury enters a mercury collecting box at the lower part for storage, and the liquid metal mercury is periodically canned and put in storage to form a metal mercury finished product; then the liquid metal mercury obtained after the mercury vapor is condensed by a multi-tube condenser enters a lower mercury collecting groove, and is periodically canned and put in storage to form a metal mercury finished product; the tail gas treated by the condensing system also contains a small amount of mercury vapor, and is further purified;
(3) Treating mercury-containing tail gas: treating the mercury-containing tail gas by a mercury-containing tail gas treatment system, wherein the mercury-containing tail gas treatment system comprises a washing tower treatment device, a multi-stage tail gas treatment device, a five-stage activated carbon adsorption bed adsorption device, a spray tower treatment device and an eight-stage activated carbon adsorption bed adsorption treatment device, and the mercury content of the treated tail gas is less than 0.01mg/Nm 3 ；
(4) Wastewater treatment: treating wastewater generated in the pretreatment process and wastewater generated in the condensation purification and mercury-containing tail gas treatment processes, adding 0.5g/L of soybean meal adsorbing material into a wastewater pool filled with the wastewater, stirring at a stirring speed of 100r/min for 30min, standing and precipitating for 2h, wherein the supernatant is purified water, and the mercury content in the purified water is lower than 0.005mg/L and reaches the discharge standard. Collecting the precipitate for treatment, and returning to the furnace to collect and recover mercury.
The preparation method of the bean pulp adsorbing material comprises the following steps:
s1, adding a sodium hydroxide solution and coco-glucoside into bean pulp powder with the particle size of 100-300 meshes, uniformly mixing to obtain a mixed material, wherein the concentration of the sodium hydroxide solution is 0.8mol/L, the volume ratio of the mass of the bean pulp powder to the volume of the sodium hydroxide solution is 1g and 15ml, and the addition amount of the coco-glucoside accounts for 0.08% of the weight of the mixed material; stirring at 50 ℃ for 8h, and cooling to room temperature to obtain a pretreated mixed material;
s2, adding carbon disulfide accounting for 10% of the weight of the soybean meal powder into the pretreated mixed material, stirring and reacting for 4 hours at the temperature of 30 ℃, filtering, washing and drying to obtain the soybean meal adsorbing material.
In the embodiment, the recovery rate of mercury is 99.4%, and the mercury content in the treated tail gas is less than 0.01mg/m 3 。
Comparative example 1
This comparative example is the same as example 1 except that: the step (1) is as follows: putting the waste mercury catalyst into a pretreatment tank, adding quicklime which is 3 times of the weight of the waste mercury catalyst into the waste mercury catalyst, and stirring at 80 ℃ for 3 hours; and aging for 24 hours, and removing water to obtain a pretreated material.
The recovery rate of the mercury treated by the waste mercury catalyst in the comparative example is 98.5%.
Comparative example 2
This comparative example is the same as example 1 except that: in the step (1), the dodecyl phenol polyoxyethylene ether is not added.
The recovery rate of mercury treated with the waste mercury catalyst of this comparative example was 99.2%.
Comparative example 3
This comparative example is the same as example 1 except that: in the preparation method of the soybean meal adsorbing material, no coco glucoside is added in the step S1.
Comparative example 4
This comparative example is the same as example 1 except that: in the preparation method of the soybean meal adsorbing material, the concentration of the sodium hydroxide solution in the step S1 is 0.15mol/L.
Comparative example 5
This comparative example is the same as example 1 except that: the bean pulp adsorbing material is bean pulp powder with the particle size of 100-300 meshes.
Test examples
Taking mercury-containing wastewater generated in the process of recycling waste mercury catalysts, measuring that the mercury content is 22.5mg/L, designing groups 1-2 and groups 3-5, respectively adding 0.5g of the adsorbents prepared in the embodiments 1, 2 and 3-5 into 500ml of mercury-containing wastewater, stirring at the stirring speed of 100r/min for 15min, standing and precipitating for 1h, taking supernate, testing the mercury content, and calculating the mercury removal rate, wherein the results are shown in Table 1.
As can be seen from table 1, compared with the comparative example, the removal rate of mercury by the soybean meal adsorbing material of the example is significantly improved, which indicates that the removal rate of mercury in mercury-containing wastewater by the soybean meal adsorbing material of the present invention is high, the removal rate is close to 100%, and the wastewater treatment efficiency is high.
TABLE 1 Mercury removal Rate for each treatment group
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A method for recycling waste mercury catalyst is characterized by comprising the following steps:
(1) Adding 2-4 times of mixed solution consisting of hydrochloric acid and dodecylphenol polyoxyethylene ether into the waste mercury catalyst, and stirring at 40-60 ℃ for 0.5-2h; adding quicklime with the weight 2-5 times that of the waste mercury catalyst, stirring at 60-80 ℃ for 2-5 h, aging for 24-48h, and removing water to obtain a pretreated material;
(2) Putting the pretreated material obtained in the step (1) into a distillation furnace, and distilling at 700-800 ℃ to obtain mercury vapor and furnace slag; condensing the mercury vapor through an air cooler and a multi-tube condenser condensing system to obtain elemental mercury;
(3) Treating mercury-containing tail gas: treating the mercury-containing tail gas by a mercury-containing tail gas treatment system, wherein the mercury-containing tail gas treatment system comprises washing tower treatment, five-stage adsorption bed adsorption, spray tower treatment and eight-stage adsorption bed adsorption;
(4) Wastewater treatment: treating the wastewater generated in the pretreatment process and the wastewater generated in the condensation purification and mercury-containing tail gas treatment processes, adding a treating agent into the wastewater, stirring, and standing for precipitation.
2. The method for recycling the waste mercury catalyst as claimed in claim 1, wherein in the step (1), the concentration of hydrochloric acid in the mixed solution is 2 to 8% by mass, and the addition amount of the dodecylphenol polyoxyethylene ether is 0.005 to 0.02% by mass of the hydrochloric acid.
3. The method for recycling the waste mercury catalyst as defined in claim 1, wherein the distillation time is 5 to 10 hours.
4. The method for recycling the waste mercury catalyst as claimed in claim 1, wherein in the step (3), the five-stage adsorption bed and the eight-stage adsorption bed are activated carbon adsorption, and the potassium permanganate solution is sprayed for treatment in a spray tower.
5. The method for recycling the waste mercury catalyst according to claim 1, wherein in the step (4), the treating agent is a soybean meal adsorbing material, and the preparation method of the soybean meal adsorbing material comprises the following steps:
s1, adding a sodium hydroxide solution and coco-glucoside into soybean meal powder with the particle size of 100-300 meshes, mixing uniformly to obtain a mixed material, stirring at 40-60 ℃ for 5-10h, and cooling to room temperature to obtain a pretreatment mixed material;
s2, adding carbon disulfide into the pretreated mixed material, stirring and reacting for 3 to 5 hours at the temperature of 20 to 40 ℃, filtering, washing and drying to obtain the bean pulp adsorbing material.
6. The method for recycling the waste mercury catalyst as claimed in claim 5, wherein the concentration of the sodium hydroxide solution is 0.5 to 1.2mol/L, and the volume ratio of the mass of the soybean meal powder to the volume of the sodium hydroxide solution is 1g to 10 to 20ml.
7. The method for recycling the waste mercury catalyst according to claim 5, wherein the coco glucoside is added in an amount of 0.08 to 0.15 percent by weight of the mixture.
8. The method for recycling the waste mercury catalyst as claimed in claim 5, wherein the amount of the carbon disulfide added is 8 to 15% of the weight of the soybean meal powder.
9. The method for recycling the waste mercury catalyst as claimed in claim 1, wherein the addition amount of the treating agent is 0.3 to 2g/L.
10. The method for recycling the waste mercury catalyst as claimed in claim 1, wherein in the step (4), the stirring speed is 50 to 150r/min, the stirring time is 10 to 60min, and the standing and precipitation are carried out for 1 to 5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211062705.7A CN115433841B (en) | 2022-08-31 | 2022-08-31 | Method for recycling waste mercury catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211062705.7A CN115433841B (en) | 2022-08-31 | 2022-08-31 | Method for recycling waste mercury catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115433841A true CN115433841A (en) | 2022-12-06 |
| CN115433841B CN115433841B (en) | 2023-08-04 |
Family
ID=84244413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211062705.7A Active CN115433841B (en) | 2022-08-31 | 2022-08-31 | Method for recycling waste mercury catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115433841B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092862A (en) * | 1973-12-13 | 1975-07-24 | ||
| GB1411904A (en) * | 1972-04-26 | 1975-10-29 | Sumitomo Chemical Co | Removal and recovery of mercury from aqueous solutions |
| US5200087A (en) * | 1990-12-12 | 1993-04-06 | Kubota Corporation | Method of and apparatus for recovering mercury from drainage |
| JP2001011548A (en) * | 1999-06-29 | 2001-01-16 | Iwanaga Zaimokuten:Kk | Method for recovering mercury from mercury-containing waste |
| CN109092284A (en) * | 2018-08-29 | 2018-12-28 | 昆明理工大学 | A kind of method of the microwave combined ultrasonic regeneration coal system containing mercury catalyst |
| CN112251606A (en) * | 2020-10-29 | 2021-01-22 | 新晃鲁湘钡业有限公司 | Distillation recovery method of waste mercury catalyst |
-
2022
- 2022-08-31 CN CN202211062705.7A patent/CN115433841B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1411904A (en) * | 1972-04-26 | 1975-10-29 | Sumitomo Chemical Co | Removal and recovery of mercury from aqueous solutions |
| JPS5092862A (en) * | 1973-12-13 | 1975-07-24 | ||
| US5200087A (en) * | 1990-12-12 | 1993-04-06 | Kubota Corporation | Method of and apparatus for recovering mercury from drainage |
| JP2001011548A (en) * | 1999-06-29 | 2001-01-16 | Iwanaga Zaimokuten:Kk | Method for recovering mercury from mercury-containing waste |
| CN109092284A (en) * | 2018-08-29 | 2018-12-28 | 昆明理工大学 | A kind of method of the microwave combined ultrasonic regeneration coal system containing mercury catalyst |
| CN112251606A (en) * | 2020-10-29 | 2021-01-22 | 新晃鲁湘钡业有限公司 | Distillation recovery method of waste mercury catalyst |
Non-Patent Citations (2)
| Title |
|---|
| 张亚雄;: "竖式自燃节能炉处理废氯化汞触媒", 中国有色冶金, no. 04 * |
| 谢子楠;徐泽棣;任富忠;杨辉;范芳焯;: "废汞触媒中汞的浸出及其再生活性炭的吸附性能", 环境工程学报, no. 05 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115433841B (en) | 2023-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10662075B2 (en) | Method and apparatus for the recovery and deep treatment of polluted acid | |
| CN102107978B (en) | Method for resource utilization and innocent treatment of etching waste liquid containing copper in circuit board industry | |
| CN102872803B (en) | Aluminum modified straw biomass charcoal as well as preparation method and application thereof on removing arsenic in water body | |
| CN112340830B (en) | Application of catalyst taking waste adsorbent after adsorption-desorption as raw material in treating high-salt organic wastewater by activating persulfate | |
| CN110280215A (en) | A kind of preparation method and application of nano silver-bamboo shoot shell biology carbon composite | |
| CN109811128B (en) | Method for recovering thallium from smelting acidic wastewater and preparing thallium iodide | |
| CN105714129B (en) | Comprehensive treatment method for extraction stage in cobalt hydrometallurgy | |
| CN105177321B (en) | A kind of gallium germanium adsorbent, its preparation method and application and the method that gallium germanium is enriched with from zinc hydrometallurgy leachate | |
| CN115433841A (en) | Method for recycling waste mercury catalyst | |
| CN110386712B (en) | Method for comprehensively utilizing zinc-containing wastewater | |
| CN109650437B (en) | Method for preparing thallium nitrate and thallium sulfate by thallium-containing acidic wastewater | |
| CN107879322A (en) | A kind of method for producing spent acid and preparing high content phosphorous acid | |
| CN104438285B (en) | Method for innocent treatment of waste mercury catalyst by mechanical ball milling with sulfur as additive | |
| CN107470317B (en) | Method for debrominating and lightening pyrolysis oil of waste circuit board | |
| CN113060791A (en) | Method for treating high-arsenic waste acid by using modified coal slag adsorbent | |
| CN110257640B (en) | Method for comprehensively recycling circuit board incineration ash | |
| CN1393570A (en) | Method for removing and recovering mercury from waste battery | |
| CN111690830A (en) | Method for recovering waste mercury nitrate reagent | |
| CN114646068A (en) | Method for treating uranium-containing high-salt waste liquid in nitric acid system | |
| CN113501594B (en) | Method for recovering mercury from high-mercury-content waste liquid | |
| CN114589186B (en) | Comprehensive treatment method of lithium-containing waste | |
| CN213505963U (en) | Preparation device of electronic grade high-purity hydrogen chloride | |
| CN103341310A (en) | Method for recycling gas-state zero-valence mercury and sulfur dioxide from non-ferrous metal metallurgy smoke gas | |
| CN108855155B (en) | Preparation method and recovery method of environment-friendly low-mercury catalyst | |
| CN111392908B (en) | Continuous mercury removal system and method for high-acidity chemical mercury-containing waste liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |