CN114653387A - Mercury-free catalyst for producing and synthesizing chloroethylene by using noble metal - Google Patents
Mercury-free catalyst for producing and synthesizing chloroethylene by using noble metal Download PDFInfo
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- CN114653387A CN114653387A CN202210379046.3A CN202210379046A CN114653387A CN 114653387 A CN114653387 A CN 114653387A CN 202210379046 A CN202210379046 A CN 202210379046A CN 114653387 A CN114653387 A CN 114653387A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 39
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 23
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 4
- 230000000996 additive effect Effects 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 67
- 229960002523 mercuric chloride Drugs 0.000 claims description 34
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 claims description 34
- 239000000243 solution Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000005406 washing Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 13
- 238000002791 soaking Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 9
- 238000003786 synthesis reaction Methods 0.000 claims 9
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 201000007270 liver cancer Diseases 0.000 description 1
- 208000014018 liver neoplasm Diseases 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/138—Halogens; Compounds thereof with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G13/00—Compounds of mercury
- C01G13/04—Halides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C21/00—Acyclic unsaturated compounds containing halogen atoms
- C07C21/02—Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds
- C07C21/04—Chloro-alkenes
- C07C21/06—Vinyl chloride
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The application discloses a mercury-free catalyst for producing and synthesizing vinyl chloride by using noble metal, which comprises 90-95 parts of a carrier, 2-8 parts of mercury chloride and 2-3 parts of an additive. The method increases the activity and the service life of the mercury-free catalyst, increases the purity of the synthesized chloroethylene, reduces the production cost of producing the synthesized chloroethylene by using noble metals, and is convenient for the production of the chloroethylene.
Description
Technical Field
The application relates to the field of mercury-free catalysts, in particular to a mercury-free catalyst for producing and synthesizing vinyl chloride by using noble metal.
Background
Vinyl chloride, also known as vinyl chloride, is an organic compound, an important monomer in polymer chemistry, and can be prepared from ethylene or acetylene, vinyl chloride is a toxic substance, and can cause liver cancer if inhaled and contacted with vinyl chloride for a long time, a catalyst is another name of "catalyst", which has the function of changing the rate of certain chemical processes to achieve a desired result, and the catalyst is a substance capable of changing the rate of reaction without changing the standard Gibbs free enthalpy change of the reaction, and the function is called catalytic action, and the reaction involving the catalyst is catalytic reaction, and the catalyst can induce the chemical reaction to change, so that the chemical reaction is accelerated or the chemical reaction is carried out in a lower temperature environment.
The prior mercury-free catalyst has lower catalytic activity, lower purity of the synthesized chloroethylene, easy carbon deposition phenomenon and inactivation, shorter service life, increased production cost of the synthesized chloroethylene produced by using noble metals and inconvenient production of the chloroethylene. Therefore, a mercury-free catalyst for synthesizing vinyl chloride using noble metal has been proposed to solve the above problems.
Disclosure of Invention
The embodiment provides a mercury-free catalyst for producing and synthesizing vinyl chloride by using noble metal, which is used for solving the problems that the existing mercury-free catalyst in the prior art is low in catalytic activity, low in purity of synthesized vinyl chloride, easy to generate carbon deposition phenomenon and lose activity, short in service life, increased in production cost of producing and synthesizing vinyl chloride by using noble metal and inconvenient for producing vinyl chloride.
According to one aspect of the present application, there is provided a mercury-free catalyst for synthesizing vinyl chloride using a noble metal, the mercury-free catalyst comprising 90 to 95 parts of a carrier, 2 to 8 parts of mercury chloride, and 2 to 3 parts of an additive.
And further, the preparation process of the mercuric chloride comprises the steps of adding the mercuric chloride into a steam-heated and mechanically-stirred dissolving tank according to the required amount, adding a certain amount of industrial hydrochloric acid and a certain amount of clear water or circulating water in an industrial pool, starting a stirrer, introducing steam for heating, and dissolving the mercuric chloride into a transparent solution to obtain a finished mercuric chloride product.
Further, during the preparation of the mercuric chloride, the heating temperature is 70-90 ℃, and the heating time is 15-25 minutes.
Further, the carrier is treated by the following steps,
s1, preprocessing, namely ultrasonically cleaning the activated carbon by using deionized water, then centrifuging by using a centrifugal device to remove supernatant, and then drying the cleaned activated carbon by using a drying device to obtain preprocessed activated carbon;
s2, modifying with alkali, adding a sodium hydroxide solution into the pretreated activated carbon obtained in the step S1, stirring, soaking, and then cleaning with deionized water until the pH value of the solution after the last washing is neutral to obtain the activated carbon after alkali washing;
and S3, modifying with acid, adding a nitric acid solution into the acid-washed activated carbon obtained in the step S2, stirring, soaking, cleaning with deionized water until the pH value of the solution after the last washing is neutral, and drying the acid-washed activated carbon by using drying equipment to obtain the carrier.
Further, the mass concentration of the sodium hydroxide solution in the step S2 is 1-10%, and the conditions of stirring and soaking are that the temperature is 30-70 ℃ and the time is 1.5-2.5 hours.
Further, the mass concentration of the nitric acid solution in the step S3 is 10-20%, and the stirring and soaking time is 0.5-1.5 hours.
Further, the preparation process of the carrier comprises the following steps,
step one, heating treatment, namely putting the waste catalyst into a recovery furnace, introducing nitrogen, and heating and recovering to obtain mercuric chloride gas and an activated carbon recovered substance;
step two, liquefaction treatment, namely introducing the mercuric chloride gas in the step one into water jet absorption equipment through a negative pressure absorption device, and circularly absorbing to obtain mercuric chloride solution;
and step three, recycling, namely washing, screening and drying the recycled activated carbon in the step one to obtain activated carbon.
Further, the recovery furnace in the first step is heated by using natural gas and is provided with a heat recycling device, and the temperature of the recovery furnace is upgraded to 750-850 ℃.
Further, the pressure of the nitrogen in the first step is 50-100pa, and the dew point of the nitrogen is-30 ℃.
And further, introducing the airflow which is dissipated in the step two and contains a small amount of mercuric chloride into an aqueous solution absorption device for water washing, then carrying out alkali washing treatment, adsorption treatment and vacuum exhaust treatment, wherein the vacuum exhaust treatment is firstly carried out to remove moisture through a fluorosilicone cotton adsorption tank, then the airflow is subjected to secondary adsorption treatment to reach the condition that qualified gases such as mercuric chloride and hydrogen chloride do not exist, and then the airflow returns to the recovery furnace in the step one.
Through the above-mentioned embodiment of this application, it is lower to have solved present mercury-free catalyst catalytic activity, and synthetic chloroethylene purity is lower, and takes place the carbon deposit phenomenon easily and inactivate, and life is shorter, has increased the manufacturing cost who uses noble metal to produce synthetic chloroethylene, the production problem of chloroethylene of being not convenient for, increases the activity and the life of mercury-free catalyst, the production of chloroethylene of being convenient for.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic flow chart of a process for preparing activated carbon according to one embodiment of the present disclosure;
fig. 2 is a schematic view of a process flow of treating the waste mercury catalyst according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-2, a mercury-free catalyst for synthesizing vinyl chloride using noble metals includes 90-95 parts of a carrier, 2-8 parts of mercuric chloride, and 2-3 parts of an additive.
The preparation process of the mercuric chloride comprises the steps of adding the mercuric chloride into a steam-heated and mechanically-stirred dissolving tank according to the required amount, adding a certain amount of industrial hydrochloric acid and a certain amount of clear water or circulating water in an industrial pool, starting a stirrer, introducing steam for heating, and dissolving the mercuric chloride into a transparent solution to obtain a finished mercuric chloride product.
During the preparation of the mercuric chloride, the heating temperature is 70-90 ℃, and the heating time is 15-25 minutes.
S1, preprocessing, namely ultrasonically cleaning the activated carbon by using deionized water, centrifuging by using a centrifugal device to remove supernatant, and drying the cleaned activated carbon by using a drying device to obtain preprocessed activated carbon; s2, modifying with alkali, namely adding a sodium hydroxide solution into the pretreated activated carbon obtained in the step S1, stirring, soaking, and then cleaning with deionized water until the pH value of the solution after the last washing is neutral to obtain the activated carbon after alkali washing; and S3, modifying with acid, adding a nitric acid solution into the acid-washed activated carbon obtained in the step S2, stirring, soaking, cleaning with deionized water until the pH value of the solution after the last washing is neutral, and drying the acid-washed activated carbon by using drying equipment to obtain the carrier.
The mass concentration of the sodium hydroxide solution in the step S2 is 1-10%, and the conditions of stirring and soaking are that the temperature is 30-70 ℃ and the time is 1.5-2.5 hours.
In the step S3, the mass concentration of the nitric acid solution is 10-20%, and the stirring and soaking time is 0.5-1.5 hours.
The preparation process of the carrier comprises the following steps of firstly, heating treatment, namely putting the waste catalyst into a recovery furnace, introducing nitrogen, and heating and recovering to obtain mercuric chloride gas and an activated carbon recovered substance; step two, liquefaction treatment, namely introducing the mercuric chloride gas in the step one into water jet absorption equipment through a negative pressure absorption device, and obtaining mercuric chloride solution through cyclic absorption, wherein the obtained mercuric chloride solution can be directly used for preparing mercuric chloride solution for soaking activated carbon and used for producing mercury-free catalyst; and step three, recovery treatment, namely washing, screening and drying the recovered active carbon in the step one to obtain active carbon, almost all substances contained in the pores of the waste catalyst are sublimated into gas in a high environment of a recovery furnace, the residual recovered active carbon with the pores completely opened is collected, and then the recovered active carbon can be reused for manufacturing a new mercury-free catalyst after being washed, screened and the like.
In the first step, the recovery furnace is heated by using natural gas and is provided with a heat recycling device, and the temperature of the recovery furnace is upgraded to 750-850 ℃.
In the first step, the pressure range of the nitrogen is 50-100pa, and the dew point of the nitrogen is-30 ℃.
And (2) introducing the air flow which is dissipated in the step two and contains a small amount of mercuric chloride into an aqueous solution absorption device for water washing, wherein the aqueous solution absorption device is a tank with an enamel lining inside, the temperature of the solution is controlled at 30-50 ℃, then carrying out alkali washing treatment, adsorption treatment and vacuum exhaust treatment, wherein the vacuum exhaust treatment is carried out by removing moisture through a fluorine-silicon oil cotton adsorption tank, then carrying out secondary adsorption treatment to obtain the product without qualified gases such as mercuric chloride, hydrogen chloride and the like, and returning the product to the recovery furnace in the step one again to realize closed cycle.
The application has the advantages that:
the method increases the activity and the service life of the mercury-free catalyst, increases the purity of the synthesized chloroethylene, reduces the production cost of producing the synthesized chloroethylene by using noble metals, and is convenient for the production of the chloroethylene.
It is well within the skill of those in the art to implement, without undue experimentation, the present application is not directed to software and process improvements, as they relate to circuits and electronic components and modules.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A mercury-free catalyst for producing and synthesizing chloroethylene by using noble metals is characterized in that: the mercury-free catalyst comprises 90-95 parts of carrier, 2-8 parts of mercuric chloride and 2-3 parts of additive.
2. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 1, wherein: the preparation process of the mercuric chloride comprises the steps of adding the mercuric chloride into a steam-heated and mechanically-stirred dissolving tank according to the required amount, adding a certain amount of industrial hydrochloric acid and a certain amount of clear water or circulating water in an industrial pool, starting a stirrer, introducing steam for heating, and dissolving the mercuric chloride into a transparent solution to obtain a finished mercuric chloride product.
3. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 2, wherein: during the preparation of the mercuric chloride, the heating temperature is 70-90 ℃, and the heating time is 15-25 minutes.
4. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 1, wherein: the treatment process of the carrier comprises the following steps of,
s1, preprocessing, namely ultrasonically cleaning the activated carbon by using deionized water, then centrifuging by using a centrifugal device to remove supernatant, and then drying the cleaned activated carbon by using a drying device to obtain preprocessed activated carbon;
s2, modifying with alkali, namely adding a sodium hydroxide solution into the pretreated activated carbon obtained in the step S1, stirring, soaking, and then cleaning with deionized water until the pH value of the solution after the last washing is neutral to obtain the activated carbon after alkali washing;
s3, acid modification, namely adding a nitric acid solution into the acid-washed activated carbon obtained in the step S2, stirring, soaking, then washing with deionized water until the pH value of the solution after the last washing is neutral, and then drying the acid-washed activated carbon by using drying equipment to obtain the carrier.
5. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 4, wherein: the mass concentration of the sodium hydroxide solution in the step S2 is 1-10%, and the conditions of stirring and soaking are that the temperature is 30-70 ℃ and the time is 1.5-2.5 hours.
6. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 4, wherein: the mass concentration of the nitric acid solution in the step S3 is 10-20%, and the stirring and soaking time is 0.5-1.5 hours.
7. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 1, wherein: the preparation process of the carrier comprises the following steps of,
step one, heating treatment, namely putting the waste catalyst into a recovery furnace, introducing nitrogen, and heating and recovering to obtain mercuric chloride gas and an activated carbon recovered substance;
step two, liquefaction treatment, namely introducing the mercuric chloride gas in the step one into water jet absorption equipment through a negative pressure absorption device, and circularly absorbing to obtain mercuric chloride solution;
and step three, recycling, namely washing, screening and drying the recycled activated carbon in the step one to obtain activated carbon.
8. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 7, wherein: in the first step, the recovery furnace is heated by using natural gas and is provided with a heat recycling device, and the temperature of the recovery furnace is upgraded to 750-850 ℃.
9. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 7, wherein: in the first step, the pressure range of the nitrogen is 50-100pa, and the dew point of the nitrogen is-30 ℃.
10. The mercury-free catalyst for vinyl chloride synthesis using noble metals as claimed in claim 7, wherein: and (3) introducing the gas flow which is dissipated in the step two and contains a small amount of mercuric chloride into an aqueous solution absorption device for water washing, then carrying out alkali washing treatment, adsorption treatment and vacuum exhaust treatment, wherein the vacuum exhaust treatment is firstly carried out to remove moisture through a fluorine-silicon oil cotton adsorption tank, then the gas flow is subjected to secondary adsorption treatment to reach the condition that qualified gases such as mercuric chloride and hydrogen chloride do not exist, and then the gas flow is returned to the recovery furnace in the step one.
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| CN103693676A (en) * | 2013-12-12 | 2014-04-02 | 毛振华 | Waste mercury catalyst recovery technology and waste mercury catalyst recovery device |
| CN105289667A (en) * | 2014-06-26 | 2016-02-03 | 内蒙古鄂尔多斯电力冶金股份有限公司氯碱化工分公司 | Compound mercury catalyst preparation method and compound mercury catalyst |
| CN109046403A (en) * | 2018-07-26 | 2018-12-21 | 昆明理工大学 | A kind of regeneration method of useless mercuric chloride catalyst |
| CN113426490A (en) * | 2021-06-24 | 2021-09-24 | 宁夏新龙蓝天科技股份有限公司 | Method for preparing mercury-free catalyst by adding dichloroethane |
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