CN106902799A - A kind of preparation method for synthesizing aluminum silica gel high - Google Patents
A kind of preparation method for synthesizing aluminum silica gel high Download PDFInfo
- Publication number
- CN106902799A CN106902799A CN201710086769.3A CN201710086769A CN106902799A CN 106902799 A CN106902799 A CN 106902799A CN 201710086769 A CN201710086769 A CN 201710086769A CN 106902799 A CN106902799 A CN 106902799A
- Authority
- CN
- China
- Prior art keywords
- silica gel
- catalyst
- specific surface
- surface area
- pore volume
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000000741 silica gel Substances 0.000 title claims abstract description 34
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 230000002194 synthesizing effect Effects 0.000 title description 3
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- 239000004411 aluminium Substances 0.000 claims abstract description 15
- 229910000632 Alusil Inorganic materials 0.000 claims abstract description 13
- 230000032683 aging Effects 0.000 claims abstract description 12
- 229910001593 boehmite Inorganic materials 0.000 claims abstract description 12
- 239000003292 glue Substances 0.000 claims abstract description 12
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims abstract description 12
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 9
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 239000002253 acid Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 14
- 230000004913 activation Effects 0.000 claims description 9
- 239000000499 gel Substances 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 4
- 235000015110 jellies Nutrition 0.000 claims description 4
- 239000008274 jelly Substances 0.000 claims description 4
- 238000001935 peptisation Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000001694 spray drying Methods 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010189 synthetic method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000004115 Sodium Silicate Substances 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052911 sodium silicate Inorganic materials 0.000 abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000005360 mashing Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 229960001866 silicon dioxide Drugs 0.000 description 23
- 238000006555 catalytic reaction Methods 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- IWLBIFVMPLUHLK-UHFFFAOYSA-N azane;formaldehyde Chemical compound N.O=C IWLBIFVMPLUHLK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000007036 catalytic synthesis reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 229910003158 γ-Al2O3 Inorganic materials 0.000 description 1
Classifications
-
- 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
- B01J21/12—Silica and alumina
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/633—Pore volume less than 0.5 ml/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/635—0.5-1.0 ml/g
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
- C07D251/40—Nitrogen atoms
- C07D251/54—Three nitrogen atoms
- C07D251/56—Preparation of melamine
- C07D251/60—Preparation of melamine from urea or from carbon dioxide and ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
The present invention provides a kind of preparation method for production of melamine high alumina catalyst, refers in particular to the preparation method of the aluminum silica gel high with high specific surface area, pore volume, intensity and low rate of wear.The present invention with sodium silicate, sulfuric acid, boehmite as main production raw material, wherein, need soaked to be washed through aging reaming and acid after sodium silicate and sulfuric acid plastic, it is ensured that catalyst specific surface area higher and pore volume aperture, effectively improve catalyst activity.The boehmite of high-quality, the effective content and the intensity of catalyst for improving the activated alumina in catalyst are added in silica gel slurries after mashing.The high quality silicon aluminium glue of industrial requirement can be produced using the present invention：Specific surface area >=300m2/ g, the 0.7cm of pore volume 0.43/ g, rate of wear≤1.5%.Solving production has high-specific surface area, pore volume, and with high intensity, the Alusil key issue of low rate of wear.Step is simple and convenient to operate, practical.
Description
Technical field
The invention belongs to Alusil preparation field, more particularly to a kind of preparation method for synthesizing aluminum silica gel high.
Background technology
Melamine is a kind of important organic chemical industry's intermediate products, is to make to have heat-resisting, ageing-resistant, acid and alkali-resistance fire-retardant
The primary raw material of three amine-formaldehyde resins of characteristic.Industrial production melamine generally uses normal, low with urea as raw material
Platen press production of melamine production technology.This production technology, using fluidized bed catalytic synthesis technique, it is desirable to which catalyst has height
The low advantage of intensity, high activity, price.It is catalyst that external BASF (BASF) mainly uses γ-Al2O3, but expensive.
Most domestic makees catalyst using silochrom, and its cheap but catalysis activity and intensity are relatively low, and consumption is big.Part three
Poly cyanamid device uses low aluminium gross porosity microspheroidal silica-alumina glue of the salic content 8% or so, high in catalysis activity and intensity
In silica gel, but due to increased raw material sulphuric acid aluminium input, its cost is higher by 10% with respect to silica gel.
The content of the invention
In order to overcome above-mentioned deficiency, the present invention to provide a kind of preparation method of melamine high alumina catalyst.Using this side
The Catalyst Production low cost of method preparation, product strength are high, abrasion are low, while have high activity, high selectivity, accessory substance few etc.
Advantage.Alumina content in 25%-35%, with cost performance higher.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of aluminum silica gel high, aluminium content is 25%~35%, the mesh of granularity 140~300 in the aluminum silica gel high.
Preferably, the specific surface area >=300m of the aluminum silica gel high2/ g, bulk density：0.3~0.7t/m3, abrasion：≤
1.5%.
Present invention also offers a kind of synthetic method of Alusil high, including：
The aging reaming of silica gel particle, acid bubble, washing pulp, filtering are obtained into SiO2The wet glue of content 8~15%；
The boehmite of peptization state is mixed with above-mentioned wet glue, spray drying forming, roasting, cooling, sieved, obtained final product；
The particle diameter of the silica gel particle is 1~3mm.
When existing silica gel is used as catalyst carrier, during silica gel typically impregnated in into the solution containing catalytic active component,
Solution is absorbed in the hole of silica gel, through formalities such as drying, activation, make Active components distribution on Silica Surface.But it is existing
Ludox due to aperture it is too small, the load capacity to aluminum oxide is too small, is unfavorable for the diffusion of reactant molecule, it is impossible to meet big stream
The melamine catalytic treatment of amount, therefore, the present invention proposes to carry out Ludox expanding treatment, improves catalyst inner surface and utilizes
Rate, it is to avoid the product molecule of hole depths generation is difficult outside escape orifice, the depth side reaction for causing.Follow-up study finds：Work as height
When the granularity of aluminum silica gel is 140~300 mesh, the aluminium content of aluminum silica gel high is up to 25%~35%, it is ensured that catalyst component fully divides
While dissipating, Ludox catalytic efficiency is greatly improved, urea bearing capacity can reach 175Kg/T per hour.
In order to realize the balance of catalyst component dispersiveness and catalytic efficiency, it is necessary to be carried out to the particle diameter and aluminium content of Ludox
Precise control, present invention research finds：If the particle diameter of the silica gel particle is SiO in wet glue after 1~3mm, reaming2Content is
8~15%, then aluminium content is up to 70%, specific surface area >=300m in the Alusil for subsequently preparing2/ g, disclosure satisfy that high flow capacity three
The requirement of poly cyanamid catalysis.
Preferably, the aging treatment conditions are：Aging 1~3h at 30~70 DEG C.
Preferably, the preparation method of the boehmite of the peptization state is：After suitable quantity of water being added in boehmite,
Jelly (gel), pH after 2~4, are filtered to mixed liquor to add nitric acid, are obtained final product.
Preferably, the roasting condition is：In 1~2h of activation at 300~600 DEG C.
It is furthermore preferred that the roasting condition is：In 1~2h of activation at 500~550 DEG C.
Preferably, the specific surface area >=300m of the wet glue2/ g, pore volume 0.4-0.7cm3/ g, preferably pore volume >=0.5cm3/
g。
Present invention also offers catalyst prepared by a kind of use the method, the mesh of granularity 140~300, bulk density：0.3~
0.7t/m3, specific surface：≥300m2/ g, abrasion：≤ 1.5%.Alumina content：25~35%.
Described method relates generally to the following aspects：
(1) with sodium silicate and sulfuric acid as raw material, using air-forming process, particulate Si glueballs, silica-gel sphere particle diameter are made
In 1~3mm.
(2) silica gel particle aging 1~3h reamings under the conditions of 30~70 DEG C, then through acid bubble, be washed to electrical conductivity and be less than
After 1000 μ s/cm, into beater pulp, the wet glue that SiO2 contents 8~15% are obtained after slurries filtering is standby.
(3) after adding suitable quantity of water in the boehmite, add nitric acid to mixed liquor jelly (gel), pH after 2~4
Filter to obtain Alumina gel.
(4) Alumina gel and silica gel slurries mix, and regulation pH of mixed is spray dried to 6~6.5 in spray dryer
Type.
(5) Alusil after being molded is further under the conditions of preferably 500~550 DEG C in 300~600 DEG C of drying and roasting converter
1~2h of activation is dried ,≤0.2% is lost to burning.
(6) after the Alusil cooling after activating, into sieved through sieve, the finished catalyst of granularity needed for being obtained.
Present invention also offers aluminum silica gel high prepared by any above-mentioned method.
Present invention also offers application of the above-mentioned aluminum silica gel high in melamine catalyst is prepared.
Beneficial effects of the present invention
(1) Alusil gone out using this technique productions method, up to 70%, the increase of aluminium content is effectively improved urges aluminium content
Agent intensity, substantially reduces rate of wear, and experiment production attrition of catalyst rate is less than 1.5%
(2) the Alusil catalyst made using this method, after aging reaming, catalyst aperture and specific surface area are big
(see photo), in catalytic reaction, macromolecular product melamine molecule can freely be desorbed in catalyst surface, effectively improve and urge
Change speed.Experiment draws aluminium content at 25%~35%, and with excellent catalysis activity, its urea bearing capacity is reachable per hour
To 175Kg/T (general commercial catalyst urea bearing capacity is in 150-165Kg/T).Catalyst choice more than 99%, accessory substance
It is few, with cost performance higher.
(3) sulfate ion that production process is introduced using aging reaming, acid bubble, washing etc., effective removal raw material, significantly
Acid ion is reduced to equipment corrosion.
(4) the aluminium source in catalyst and raw material boehmite, are converted into γ-type active oxidation in calcination activation
Aluminium, effectively improves catalyst reaction activity.
(5) preparation method of the present invention is simple, practical, it is easy to promote.
Brief description of the drawings
Fig. 1 adsorption desorption curves；
Fig. 2 pore-size distributions.
Specific embodiment
Feature of present invention and other correlated characteristics are described in further detail by the following examples, in order to the same industry
The understanding of technical staff：
Embodiment 1
With sodium silicate and sulfuric acid as raw material, using air-forming process, particulate Si glueballs is made, silica-gel sphere particle diameter is 1
~3mm.Make silica gel particle aging 1~3h reamings under the conditions of 30~70 DEG C of shaping.Silica gel particle after reaming through acid bubble,
Electrical conductivity is washed to less than after 1000 μ s/cm, into beater pulp, SiO is obtained after slurries filtering2The wet glue of content 8~15%
It is standby.
Boehmite (see the table below) and 2Kg the desalted waters mixing of constant weight are weighed, under high velocity agitation, 5% is added
Nitric acid to mixed liquor, jelly (gel), pH are filtered after 2~4.Then take the wet rubber cement liquid of 20Kg to mix with aluminium glue liquid, use
5% nitric acid adjusts pH of mixed 6~6.5.Mixed liquor squeezes into spray dryer spray drying forming, shaped article through plunger displacement pump
1~2h of activation is further dried under the conditions of 300~600 DEG C of drying and roasting converter.After Alusil cooling after activation, into sieve
Mesh screen point, the finished catalyst of granularity needed for being obtained.
By the regulation of boehmite in embodiment, the regulation to aluminium content in Alusil is reached.The corresponding regulation of correspondence
The Alusil produced its physical and chemical index is shown in comparative example.
Comparative example
| Sample number into spectrum | Bulk density g/ml | Granularity | Pore volume g/ml | Abrasion % | |
| Embodiment 1 | 625 | 120-200 | 396 | 0.71 | 3.2 |
| Embodiment 2 | 678 | 120-200 | 442 | 0.65 | 2.2 |
| Embodiment 3 | 727 | 120-200 | 487 | 0.6 | 1.45 |
| Embodiment 4 | 769 | 120-200 | 514 | 0.53 | 1.32 |
| Embodiment 5 | 813 | 120-200 | 476 | 0.47 | 1.23 |
| Embodiment 6 | 854 | 120-200 | 407 | 0.41 | 1.14 |
| Embodiment 7 | 897 | 120-200 | 338 | 0.33 | 1.07 |
| Commercially available Alusil | 900-1100 | 180-300 | 150-200 | 0.2-0.4 | 2-4 |
Finally it should be noted that the foregoing is only the preferred embodiments of the present invention, this hair is not limited to
Bright, although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it is still
Technical scheme described in previous embodiment can be modified, or equivalent is carried out to which part.It is all in this hair
Within bright spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in protection scope of the present invention
Within.Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to the scope of the present invention
Limitation, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not required to
The various modifications or deformation made by paying creative work are still within protection scope of the present invention.
Claims (10)
1. a kind of aluminum silica gel high, it is characterised in that aluminium content is 25%~35%, granularity 140~300 in the aluminum silica gel high
Mesh.
2. aluminum silica gel high as claimed in claim 1, it is characterised in that the specific surface area >=300m of the aluminum silica gel high2/ g, heap
Proportion：0.3~0.7t/m3, abrasion：≤ 1.5%.
3. a kind of synthetic method of Alusil high, it is characterised in that including：
The aging reaming of silica gel particle, acid bubble, washing pulp, filtering are obtained into SiO2The wet glue of content 8~15%；
The boehmite of peptization state is mixed with above-mentioned wet glue, spray drying forming, roasting, cooling, sieved, obtained final product；
The particle diameter of the silica gel particle is 1~3mm.
4. method as claimed in claim 3, it is characterised in that the aging treatment conditions are：Aging 1 at 30~70 DEG C~
3h。
5. method as claimed in claim 3, it is characterised in that the preparation method of the boehmite of the peptization state is：
After adding suitable quantity of water in boehmite, jelly (gel), pH after 2~4, are filtered to mixed liquor to add nitric acid, are obtained final product.
6. method as claimed in claim 3, it is characterised in that the roasting condition is：In at 300~600 DEG C activation 1~
2h。
7. method as claimed in claim 6, it is characterised in that the roasting condition is：In at 500~550 DEG C activation 1~
2h。
8. method as claimed in claim 3, it is characterised in that the specific surface area >=300m of the wet glue2/ g, pore volume 0.4-
0.7cm3/ g, preferably pore volume >=0.5cm3/g。
9. the aluminum silica gel high that prepared by the method described in any one of claim 3-8.
10. application of the aluminum silica gel high described in claim 1,2 or 8 in melamine catalyst is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086769.3A CN106902799B (en) | 2017-02-17 | 2017-02-17 | Preparation method of synthetic high-alumina silica gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086769.3A CN106902799B (en) | 2017-02-17 | 2017-02-17 | Preparation method of synthetic high-alumina silica gel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106902799A true CN106902799A (en) | 2017-06-30 |
| CN106902799B CN106902799B (en) | 2020-03-27 |
Family
ID=59207594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710086769.3A Active CN106902799B (en) | 2017-02-17 | 2017-02-17 | Preparation method of synthetic high-alumina silica gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106902799B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110665521A (en) * | 2019-10-29 | 2020-01-10 | 青岛惠城环保科技股份有限公司 | Catalyst for synthesizing melamine and preparation method thereof |
| CN113694911A (en) * | 2021-09-16 | 2021-11-26 | 四川金象赛瑞化工股份有限公司 | Catalyst for synthesizing melamine and preparation method thereof |
| CN113694912A (en) * | 2021-09-16 | 2021-11-26 | 四川金象赛瑞化工股份有限公司 | Catalyst for melamine production and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422385A (en) * | 1977-07-19 | 1979-02-20 | Mitsui Toatsu Chem Inc | Preparation of melamine |
| EP2158187A2 (en) * | 2007-06-14 | 2010-03-03 | Basf Se | Method for producing melamine |
| CN101869830A (en) * | 2009-04-22 | 2010-10-27 | 北京三聚环保新材料股份有限公司 | Method for preparing silicon-aluminium denitrfying agent |
| CN102160996A (en) * | 2010-02-24 | 2011-08-24 | 中国石油化工股份有限公司 | Composition of boehmite and silicon-containing compound and silicon oxide-alumina prepared from same |
| CN102580711A (en) * | 2012-02-01 | 2012-07-18 | 四川金象赛瑞化工股份有限公司 | Production method for synthesizing melamine catalyst by urea with gas phase method |
-
2017
- 2017-02-17 CN CN201710086769.3A patent/CN106902799B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422385A (en) * | 1977-07-19 | 1979-02-20 | Mitsui Toatsu Chem Inc | Preparation of melamine |
| EP2158187A2 (en) * | 2007-06-14 | 2010-03-03 | Basf Se | Method for producing melamine |
| CN101869830A (en) * | 2009-04-22 | 2010-10-27 | 北京三聚环保新材料股份有限公司 | Method for preparing silicon-aluminium denitrfying agent |
| CN102160996A (en) * | 2010-02-24 | 2011-08-24 | 中国石油化工股份有限公司 | Composition of boehmite and silicon-containing compound and silicon oxide-alumina prepared from same |
| CN102580711A (en) * | 2012-02-01 | 2012-07-18 | 四川金象赛瑞化工股份有限公司 | Production method for synthesizing melamine catalyst by urea with gas phase method |
Non-Patent Citations (3)
| Title |
|---|
| 李先栓: "《高中化学创新实验课程》", 30 June 2011, 东北师范大学出版社 * |
| 陈诵英等: "《催化剂制备技术基础—第二届全国催化剂制备科学和技术学术研讨会论文集》", 31 October 1997, 杭州大学出版社 * |
| 顾俊华: ""三聚氰胺生产中催化剂的选型"", 《中氮肥》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110665521A (en) * | 2019-10-29 | 2020-01-10 | 青岛惠城环保科技股份有限公司 | Catalyst for synthesizing melamine and preparation method thereof |
| CN113694911A (en) * | 2021-09-16 | 2021-11-26 | 四川金象赛瑞化工股份有限公司 | Catalyst for synthesizing melamine and preparation method thereof |
| CN113694912A (en) * | 2021-09-16 | 2021-11-26 | 四川金象赛瑞化工股份有限公司 | Catalyst for melamine production and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106902799B (en) | 2020-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7019813B2 (en) | Catalyst for producing α-phenylethanol by hydrogenation of acetophenone, its production method and application | |
| CN104759286B (en) | ozone catalyst preparation method | |
| CN106902799A (en) | A kind of preparation method for synthesizing aluminum silica gel high | |
| CN104941578A (en) | Silica-gel composite particles for purification and preparation method thereof | |
| CN1853785A (en) | Silicon and boron contained alumina carrier and production thereof | |
| CN110947428B (en) | UiO @ Pd @ UiO catalyst and preparation method and application thereof | |
| CN110479251B (en) | Macroporous-mesoporous supported palladium catalyst, and preparation method and application thereof | |
| CN107824196A (en) | A kind of organic wastewater ozone oxidation catalyst and its preparation and application | |
| CN107008492A (en) | A kind of high dispersive beaded catalyst synthesized for hydrogen peroxide and its preparation method and application | |
| US20120302431A1 (en) | Composite catalyst and method for preparation thereof | |
| CN104923313A (en) | Preparation method of alumina carrier | |
| CN108339548A (en) | A kind of nickel/aluminium oxide catalyst microballoon and preparation method thereof | |
| CN114950425B (en) | Preparation method and application of millimeter-scale spherical copper-based catalyst | |
| CN106345486A (en) | High-efficiency solid-phase ozone oxidation catalyst, and preparation method and application thereof | |
| CN107008223B (en) | The adsorbent and preparation method thereof of low-load amount high dispersive type benzene refining desulfurization | |
| CN105013500A (en) | Heterogeneous Fenton catalyst for degrading azo dye wastewater as well as preparation method and application of heterogeneous Fenton catalyst | |
| CN114917912A (en) | Catalyst for preparing methanol and co-producing ethylene glycol by ethylene carbonate hydrogenation, preparation method and use method | |
| CN102380404A (en) | Catalyst used for producing promoter N-cyclohexyl benzothiazole sulfonamide and its preparation method | |
| CN105642225B (en) | Preparation method of adsorbent for deacidification of unsaturated acid ester | |
| CN109382131B (en) | The method of propane dehydrogenation catalyst and preparation method thereof and preparing propylene by dehydrogenating propane | |
| CN106622389A (en) | Alumina carrier and preparation method and application thereof | |
| CN106622195A (en) | Alpha- alumina supporter and preparation method thereof and application | |
| CN102580711B (en) | Production method for synthesizing melamine catalyst by urea with gas phase method | |
| CN104437664A (en) | Method for preparing alpha-alumina carrier | |
| CN108906054A (en) | A kind of forming method using Fenton iron cement preparation ozone oxidation nbsCOD catalyst |
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 |