CN109453803A - A kind of kaolinite soil matrix FCC catalyst and preparation method thereof - Google Patents
A kind of kaolinite soil matrix FCC catalyst and preparation method thereof Download PDFInfo
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- CN109453803A CN109453803A CN201811434309.6A CN201811434309A CN109453803A CN 109453803 A CN109453803 A CN 109453803A CN 201811434309 A CN201811434309 A CN 201811434309A CN 109453803 A CN109453803 A CN 109453803A
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- kaolin
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- fcc catalyst
- filter cake
- soil matrix
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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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/085—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
- B01J29/088—Y-type faujasite
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/085—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
- C10G11/04—Oxides
- C10G11/05—Crystalline alumino-silicates, e.g. molecular sieves
-
- 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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
Abstract
The invention belongs to FCC catalyst technical fields, and in particular to a kind of kaolinite soil matrix FCC catalyst and preparation method thereof.The catalyst includes: 100~120 parts of zeolite, 20~25 parts of alukalin, 15~20 parts of matrix, 10~15 parts of transition metal oxide.Kaolinite soil matrix FCC catalyst provided by the present invention has very high selectivity to hydrocarbon raw material catalytic cracking gasoline.
Description
Technical field
The invention belongs to FCC catalyst technical fields, and in particular to a kind of kaolinite soil matrix FCC catalyst and its preparation side
Method.
Background technique
Catalytic cracking is the oil refining process of commercially large-scale application.Use fluid catalytic cracking (FCC) technique
To prepare most of oil plant oil product.FCC technique is usually directed to by splitting heavy hydrocarbon feedstocks in recycling catalyst circulation
In chemical industry skill with circulation can fluidized catalytic cracking catalyst material stock contact, by the crack materials at the product of relatively lightweight, institute
It is about 20 microns to about 150 microns, preferably approximately 50 microns to about 100 microns that catalyst inventory, which is stated, by average particle size
Particle composition.
When the reaction by occurring at high temperature in the presence of a catalyst converts the hydrocarbon raw material of relatively high molecular weight to
When the product of relatively lightweight, catalytic cracking occurs, wherein most of conversion or cracking occur in vapour phase.Convert the feedstock to vapour
There are four oil, distillate and other liquid cracking products and per molecule tool or the gaseous cracked production of relatively lightweight of less carbon atom
Object.The gas part is made of alkene, and part is made of saturated hydrocarbons.Also generate tower bottom residual oil and coke.
FCC catalyst is usually made of a series of minimum spheroidal particles.Class of trade usually have about 20 microns extremely
150 microns, preferably approximately 50 microns to about 100 microns of average particle size.Cracking catalyst is grouped as it respectively by many groups
It is designed as the overall performance of enhancing catalyst.FCC catalyst is usually by catalytic activity zeolite, active matrix, clay and adhesive
Composition, all these components are incorporated in single particle.Alternatively, blend of the catalyst by the independent particle with different function
Composition.
On the one hand kaolin is to use as binder-type catalyst carrier for FCC catalyst, predominantly FCC catalyst
There is provided the physical properties such as preferable abrasion resistance, moderate bulk density or as the promotor of the active component technology due to spy
Different preparation process enables activity, stability, preventing from heavy metal performance, the slag oil cracking performance, gasoline selective of this kind of catalyst
And abrasion resistance, regenerability etc. are all very well, processing process is simple, is rising FCC catalyst.
Although China's kaolin resource is abundant, since the cause condition in various regions mineral deposit is different, make the height of different sources
Ridge soil soil ingredient, structure, in terms of it is widely different, application effect is also different, actually can catalytic cracking preparation
, mainly Suzhou Yang Shankuang and Period In Maoming mine, it is therefore desirable to right few with kaolinic kaolin mineral resources at catalyst
Kaolin is modified, to be applied in FCC catalyst.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of kaolinite soil matrix FCC catalysts and preparation method thereof.
Technical solution provided by the present invention is as follows:
A kind of kaolinite soil matrix FCC catalyst, comprising: 100~120 parts of zeolite, 20~25 parts of alukalin, 15~
20 parts of matrix, 10~15 parts of transition metal oxide.
Kaolinite soil matrix FCC catalyst provided by the present invention has very high selection to hydrocarbon raw material catalytic cracking gasoline
Property.
Specifically, any one of the matrix in titanium dioxide, aluminium oxide, silica or magnesia.
Specifically, the transition metal oxide is in yttrium oxide, ceria, lanthana, praseodymium oxide or neodymia
Any one.
Specifically, the alukalin is prepared by the following steps to obtain:
1) the kaolin filter cake that solid content is 66~68% is prepared, partial size is below at two microns in the kaolin filter cake
The content of kaolin particle accounts for the 85wt% or more of kaolin particle in the kaolin filter cake；
2) the kaolin filter cake for obtaining step 1) flashes under the conditions of -200pa~-100pa tiny structure, is dry, obtains
Moisture content is in 1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, it forges
Burning temperature is 700~900 DEG C, and calcination time is 1.0~2.0 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, the conduct of Chinese honey locust powder is added in depolymehzation process
Modifying agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein the Chinese honey locust powder dosage
It is 3~5% with the kaolinic weight percent of the thermal activation.
Based on the above-mentioned technical proposal, the alukalin obtained has good concerted catalysis effect.
The present invention also provides the preparation methods of kaolinite soil matrix FCC catalyst provided by the present invention, comprising the following steps:
By 100~120 parts of zeolite, 20~25 parts of alukalin, 15~20 parts of matrix and 10~15 parts of oxo transition metal
Compound mixing after be prepared into aqueous slurry, by the aqueous slurry grind and spray-dried device be spray-dried, be extruded into
Type, finally calcine to get.
Based on above scheme, the kaolinite soil matrix FCC catalyst being prepared has very hydrocarbon raw material catalytic cracking gasoline
High selectivity.
Specifically, being calcined 1~2 hour at 550~600 DEG C.
Specifically, any one of the matrix in titanium dioxide, aluminium oxide, silica or magnesia.
Specifically, the transition metal oxide is in yttrium oxide, ceria, lanthana, praseodymium oxide or neodymia
Any one.
Specifically, the alukalin is prepared by the following steps to obtain:
1) the kaolin filter cake that solid content is 66~68% is prepared, partial size is below at two microns in the kaolin filter cake
The content of kaolin particle accounts for the 85wt% or more of kaolin particle in the kaolin filter cake；
2) the kaolin filter cake for obtaining step 1) flashes under the conditions of -200pa~-100pa tiny structure, is dry, obtains
Moisture content is in 1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, it forges
Burning temperature is 700~900 DEG C, and calcination time is 1.0~2.0 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, the conduct of Chinese honey locust powder is added in depolymehzation process
Modifying agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein the Chinese honey locust powder dosage
It is 3~5% with the kaolinic weight percent of the thermal activation.
Based on the above-mentioned technical proposal, selected alukalin has good concerted catalysis effect.
Specific embodiment
The principles and features of the present invention are described below, and illustrated embodiment is served only for explaining the present invention, is not intended to
It limits the scope of the invention.
Embodiment 1
Kaolinite soil matrix FCC catalyst includes: 120 parts of zeolite, 20 parts of alukalin, 20 parts of matrix, 10 parts
Transition metal oxide.
The preparation method comprises the following steps: by 120 parts of zeolite, 20 parts of alukalin, 20 parts of matrix and the transition of 10~part gold
It is prepared into aqueous slurry after belonging to oxide mixing, by aqueous slurry grinding and the spray drying of spray-dried device, is being extruded into
Type, finally calcined at 600 DEG C 1 hour to get.
Matrix is selected from silica.Transition metal oxide is selected from yttrium oxide.Zeolite is y-type zeolite.
Alukalin is prepared by the following steps to obtain:
1) the kaolin filter cake that solid content is 68% is prepared, partial size is in two microns of kaolin below in kaolin filter cake
The content of grain accounts for the 85wt% or more of kaolin particle in kaolin filter cake；
2) the kaolin filter cake for obtaining step 1) flashes under the conditions of -200papa tiny structure, is dry, obtains moisture content
In 1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, it forges
Burning temperature is 900 DEG C, and calcination time is 1.0 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, Chinese honey locust powder is added in depolymehzation process as modification
Agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein Chinese honey locust powder dosage and thermal activation
Kaolinic weight percent is 5%.
Embodiment 2
Kaolinite soil matrix FCC catalyst includes: 100 parts of zeolite, 25 parts of alukalin, 20 parts of matrix, 15 parts
Transition metal oxide.
The preparation method comprises the following steps: by 100 parts of zeolite, 25 parts of alukalin, 15 parts of matrix and 15 parts of transition metal
It is prepared into aqueous slurry after oxide mixing, by aqueous slurry grinding and spray-dried device is spray-dried, in extrusion molding,
Finally calcined at 550 DEG C 2 hours to get.
Matrix is selected from titanium dioxide.Transition metal oxide is selected from neodymia.Zeolite is faujasite.
Alukalin is prepared by the following steps to obtain:
1) the kaolin filter cake that solid content is 67% is prepared, partial size is in two microns of kaolin below in kaolin filter cake
The content of grain accounts for the 85wt% or more of kaolin particle in kaolin filter cake；
2) the kaolin filter cake that step 1) obtains is existed -- it is flashed under the conditions of 100pa tiny structure, is dry, obtained moisture content and exist
1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, it forges
Burning temperature is 700 DEG C, and calcination time is 2.0 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, Chinese honey locust powder is added in depolymehzation process as modification
Agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein Chinese honey locust powder dosage and thermal activation
Kaolinic weight percent is 3%.
Embodiment 3
Kaolinite soil matrix FCC catalyst includes: 110 parts of zeolite, 22 parts of alukalin, 18 parts of matrix, 13 parts
Transition metal oxide.
The preparation method comprises the following steps: by 110 parts of zeolite, 22 parts of alukalin, 18 parts of matrix and 13 parts of transition metal
It is prepared into aqueous slurry after oxide mixing, by aqueous slurry grinding and spray-dried device is spray-dried, in extrusion molding,
Finally calcined at 550~600 DEG C 1.5 hours to get.
Matrix is selected from aluminium oxide.Transition metal oxide is selected from lanthana.Zeolite is y-type zeolite.
Alukalin is prepared by the following steps to obtain:
1) the kaolin filter cake that solid content is 67% is prepared, partial size is in two microns of kaolin below in kaolin filter cake
The content of grain accounts for the 85wt% or more of kaolin particle in kaolin filter cake；
2) the kaolin filter cake for obtaining step 1) flashes under the conditions of -140pa tiny structure, is dry, obtains moisture content and exists
1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, it forges
Burning temperature is 820 DEG C, and calcination time is 1.60 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, Chinese honey locust powder is added in depolymehzation process as modification
Agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein Chinese honey locust powder dosage and thermal activation
Kaolinic weight percent is 3.5%.
Comparative example 1.
Kaolinite soil matrix FCC catalyst includes: 110 parts of zeolite, 22 parts of metakaolin, 18 parts of matrix, 13 parts of mistake
Cross metal oxide.
The preparation method comprises the following steps: by 110 parts of zeolite, 22 parts of alukalin, 18 parts of matrix and 13 parts of transition metal
It is prepared into aqueous slurry after oxide mixing, by aqueous slurry grinding and spray-dried device is spray-dried, in extrusion molding,
Finally calcined at 550~600 DEG C 1.5 hours to get.
Matrix is selected from aluminium oxide.Transition metal oxide is selected from lanthana.Zeolite is y-type zeolite.
The catalytic activity and selectivity of the carbon monoxide-olefin polymeric are measured, as a result as follows:
| Project | H2 | Gasoline+LPC | LCO | Coke |
| Embodiment 1 | 2.31 | 51.23 | 14.08 | 11.42 |
| Embodiment 2 | 2.05 | 49.87 | 13.57 | 10.84 |
| Embodiment 3 | 1.99 | 52.31 | 14.20 | 11.99 |
| Comparative example 1 | 4.16 | 35.48 | 10.21 | 9.78 |
From data as can be seen that kaolinite soil matrix FCC catalyst provided by the present invention is to H2Have with gasoline+LPC preferable
Selectivity.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of kaolinite soil matrix FCC catalyst characterized by comprising 100~120 parts of zeolite, 20~25 parts of activity are high
Ridge soil, 15~20 parts of matrix, 10~15 parts of transition metal oxide.
2. kaolinite soil matrix FCC catalyst according to claim 1, it is characterised in that: the matrix is selected from titanium dioxide, oxygen
Change any one in aluminium, silica or magnesia.
3. kaolinite soil matrix FCC catalyst according to claim 1, it is characterised in that: the transition metal oxide is selected from
Any one in yttrium oxide, ceria, lanthana, praseodymium oxide or neodymia.
4. kaolinite soil matrix FCC catalyst according to claim 1, it is characterised in that: the zeolite is faujasite or Y type
Zeolite.
5. kaolinite soil matrix FCC catalyst according to any one of claims 1 to 4, which is characterized in that the alukalin by
Following steps are prepared:
1) the kaolin filter cake that solid content is 66~68% is prepared, partial size is in two microns of kaolinites below in the kaolin filter cake
The content of soil particle accounts for the 85wt% or more of kaolin particle in the kaolin filter cake；
2) the kaolin filter cake for obtaining step 1) flashes under the conditions of -200pa~-100pa tiny structure, is dry, obtains aqueous
Rate is in 1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, calcining temperature
Degree is 700~900 DEG C, and calcination time is 1.0~2.0 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, Chinese honey locust powder is added in depolymehzation process as modification
Agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein the Chinese honey locust powder dosage and institute
Stating the kaolinic weight percent of thermal activation is 3~5%.
6. a kind of preparation method of kaolinite soil matrix FCC catalyst, feature exist, comprising the following steps: by 100~120 parts of boiling
It is after stone, 20~25 parts of alukalin, 15~20 parts of matrix and the mixing of 10~15 parts of transition metal oxide plus aqueous
Solvent is prepared into aqueous slurry, by the aqueous slurry grind and spray-dried device be spray-dried, in extrusion molding, finally
Calcined at 550~600 DEG C 1~2 hour to get.
7. the preparation method of kaolinite soil matrix FCC catalyst according to claim 1, it is characterised in that: the matrix is selected from
Any one in titanium dioxide, aluminium oxide, silica or magnesia.
8. the preparation method of kaolinite soil matrix FCC catalyst according to claim 1, it is characterised in that: the transition metal
Any one of oxide in yttrium oxide, ceria, lanthana, praseodymium oxide or neodymia.
9. the preparation method of kaolinite soil matrix FCC catalyst according to claim 1, it is characterised in that: the zeolite is eight
Face zeolite or y-type zeolite.
10. the preparation method of kaolinite soil matrix FCC catalyst according to any one of claims 1 to 4, which is characterized in that described
Alukalin is prepared by the following steps to obtain:
1) the kaolin filter cake that solid content is 66~68% is prepared, partial size is in two microns of kaolinites below in the kaolin filter cake
The content of soil particle accounts for the 85wt% or more of kaolin particle in the kaolin filter cake；
2) the kaolin filter cake for obtaining step 1) flashes under the conditions of -200pa~-100pa tiny structure, is dry, obtains aqueous
Rate is in 1.5% kaolin dry powder below；
3) the high temperature clean flue gas calcining step 2 generated using natural gas as heat source burning) obtained kaolin dry powder, calcining temperature
Degree is 700~900 DEG C, and calcination time is 1.0~2.0 hours, obtains thermal activation kaolin；
4) the obtained thermal activation kaolin of step 3) is subjected to depolymerization, Chinese honey locust powder is added in depolymehzation process as modification
Agent eliminates the agglomeration of the agglomeration generated when high-temperature calcination, obtains alukalin, wherein the Chinese honey locust powder dosage and institute
Stating the kaolinic weight percent of thermal activation is 3~5%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861726A (en) * | 2021-09-29 | 2021-12-31 | 广东宝丰陶瓷科技发展股份有限公司 | Preparation method for low-grade kaolin composite efficient activation modification |
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|---|---|---|---|---|
| CN1186105A (en) * | 1996-12-24 | 1998-07-01 | 中国石化兰州炼油化工总厂 | Catalyst containing modified kaoling for cracking hydrocarbons |
| CN102049284A (en) * | 2009-10-30 | 2011-05-11 | 中国石油天然气股份有限公司 | Catalytic cracking propylene additive and preparation method thereof |
| CN102872902A (en) * | 2011-07-12 | 2013-01-16 | 中国石油化工股份有限公司 | Catalytic cracking assistant for propylene yield increase |
| CN104045092A (en) * | 2014-06-26 | 2014-09-17 | 茂名高岭科技有限公司 | Method for preparing activated kaolin by washing kaolin with water |
| CN105728030A (en) * | 2014-12-12 | 2016-07-06 | 中国石油天然气股份有限公司 | Novel anti-heavy metal cracking catalyst and preparation method thereof |
-
2018
- 2018-11-28 CN CN201811434309.6A patent/CN109453803A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1186105A (en) * | 1996-12-24 | 1998-07-01 | 中国石化兰州炼油化工总厂 | Catalyst containing modified kaoling for cracking hydrocarbons |
| CN102049284A (en) * | 2009-10-30 | 2011-05-11 | 中国石油天然气股份有限公司 | Catalytic cracking propylene additive and preparation method thereof |
| CN102872902A (en) * | 2011-07-12 | 2013-01-16 | 中国石油化工股份有限公司 | Catalytic cracking assistant for propylene yield increase |
| CN104045092A (en) * | 2014-06-26 | 2014-09-17 | 茂名高岭科技有限公司 | Method for preparing activated kaolin by washing kaolin with water |
| CN105728030A (en) * | 2014-12-12 | 2016-07-06 | 中国石油天然气股份有限公司 | Novel anti-heavy metal cracking catalyst and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861726A (en) * | 2021-09-29 | 2021-12-31 | 广东宝丰陶瓷科技发展股份有限公司 | Preparation method for low-grade kaolin composite efficient activation modification |
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Application publication date: 20190312 |