CN1247304C - Method for preparing cracking catalyst - Google Patents
Method for preparing cracking catalyst Download PDFInfo
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- CN1247304C CN1247304C CN 03149932 CN03149932A CN1247304C CN 1247304 C CN1247304 C CN 1247304C CN 03149932 CN03149932 CN 03149932 CN 03149932 A CN03149932 A CN 03149932A CN 1247304 C CN1247304 C CN 1247304C
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- kaolin
- colloid
- boehmite
- catalyst
- fine powder
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Abstract
The present invention relates to a method for preparing a cracking catalyst, which comprises the following steps: (1), kaolin and quasi-thin diaspore are transported to a preparation site by containers and are loaded in a corresponding storage tank; (2), the kaolin is mechanically crushed into fine powder of which the average particle diameter is smaller than 150 mu m; (3), the kaolin fine powder is prepared into colloidal matters by humidifying equipment; (4), the quasi-thin diaspore is prepared into quasi-thin diaspore slurry by the humidifying equipment; (5), the kaolin colloidal matters and the quasi-thin diaspore slurry are mixed to obtain substrate colloidal matters, and the substrate colloidal matters are continuously heated up and aged; (6), after the aged substrate colloidal matters and molecular sieve slurry are thoroughly mixed, and then a spray drying process is carried out, thereby, a catalyst product is obtained. The method can make the catalyst preparation course automatized and serialized; Thereby, the raw material loss and the labor cost are largely reduced.
Description
Technical field
The present invention relates to the preparation method of Cracking catalyst, more particularly, is a kind of production of cracking catalyst of full-automatic, serialization.
Background technology
Cracking catalyst mainly is made up of matrix and active component.The major function of matrix components is: the dispersed activity component, thus make the catalytic action performance of active component more abundant; Make catalyst possess certain mechanical strength, especially wearability; Effectively heat dispersing makes active component be unlikely to rapid inactivation under hot conditions, increases the service life; Possess certain big molecule cracking ability, certain effect etc. is arranged catching harmful element.Therefore, matrix partly is the important component part of Cracking catalyst, and its performance, manufacturing cost all have material impact to the performance and the cost of final products.Active part is mainly born the effect that raw material components is converted into the purpose product, and most chemical reactions all occur in the active component part, and its effect will determine the conversion ratio of purpose product, the quality of product, thus the economic benefit of determination device.The Cracking catalyst that industry is at present used generally is divided into two classes, promptly so-called complete synthetic and semi-synthetic catalyst.Semi-synthetic catalyst is made up of matrix and active component, and active component mainly is selected from: REY, REHY, USY, ZSM-5 or other are selected one or more in the type molecular sieve; The matrix part mainly is natural clay, aluminium base binding agent, Ludox etc.Full synthetic catalyst is then mainly formed by feedstock production such as aluminum sulfate solution, waterglass, sodium metaaluminate, molecular sieves.
The constituent of Cracking catalyst no doubt plays a decisive role to character, the cost of catalyst, and the Preparation of catalysts mode also has material impact to stable, the production cost of product quality, working environment etc.Traditional catalyst preparation process be will kaolin the making beating back use acidifying, add binding agent again and continue to mix making beating, heat up and wear out, add at last active component become glue after spray-drying become product.Specifically be made up of following step: (1) chemical water adds in the normal pressure stirred tank, adds the kaolin making beating according to certain proportioning; (2) add the hcl acidifying making beating; (3) add the making beating of boehmite dry powder; (4) intensification is aging; (5) adding the active component slurries mixes; (6) spray-drying obtains catalyst prod.
There is following problem in existing Cracking catalyst preparation technology: transport the user scene to because existing kaolin and boehmite dry powder are forms with one bag of 50KG and 30KG, in pulping process, need manually to separate bag, metering, reinforced, operating environment is more abominable, cost of labor and power consumption are also higher, thereby cause the problem of processing cost, environmental protection aspect; The repeatedly mixing in tank reactor of powder and colloid, colloid and colloid causes the instability of product quality easily; The use of a large amount of main equipments makes catalyst plant loss of material in the process of conversion products kind excessive.
The bibliographical information of relevant Cracking catalyst and catalyst substrates aspect is a lot, but they mainly concentrate on aspects such as operating parameter, additive in the prescription of modifying kaolin, catalyst and the preparation process, and the content that relevant Cracking catalyst serialization prepares the aspect is not appeared in the newspapers so far.
Summary of the invention
The objective of the invention is to provide on the basis of existing technology a kind of production of cracking catalyst of full-automatic, serialization.
Method for preparing catalyst provided by the invention may further comprise the steps: (1) kaolin raw material, boehmite raw material transport the preparation scene to container, and in the corresponding storage tank of packing into; (2) be the fine powder of average grain diameter with kaolin raw material Mechanical Crushing less than 150 μ m; (3) the kaolin fine powder is prepared into colloid by humidifying equipment; (4) boehmite is made the boehmite slurries by humidifying equipment; (5) kaolin colloid is mixed with the boehmite slurries and is obtained the matrix colloid, and it is aging to continue to heat up; (6) the matrix colloid after aging is with after molecular sieve pulp fully mixes, and spray-drying makes catalyst prod.
Compared with prior art, the present invention mainly has the characteristics of following several respects:
1. make catalyst preparation process automation, serialization, thereby greatly reduce material loss and cost of labor.
2. produce continuously, accurate measurement, stable production process, product quality improves.
3. clean operation environment helps health of operators and environmental protection.
4. during product transformation, loss of material is descended greatly.
The specific embodiment
Method for preparing catalyst provided by the invention mainly comprises steps such as storage, fragmentation, conveying, humidification, colloid mixing, through obtaining meeting the catalyst colloid that product quality requires after the above-mentioned steps.The method of the invention can be described in detail as follows: (1) kaolin raw material, boehmite raw material transport the preparation scene to container, and in the corresponding storage tank of packing into; (2) the kaolin raw material is sent into continuous crushing equipment with screw rod conveyor, obtains the kaolin fine powder of average grain diameter less than 150 μ m; (3) kaolin fine powder and chemical water, hydrochloric acid etc. are sent into humidifier 1 according to certain proportioning continuous metering, obtain kaolin colloid; (4) with step (3) simultaneously, boehmite dry powder and chemical water or chemical water are sent into humidifier 2 with sour mixture according to certain proportioning continuous metering, obtain the boehmite slurries; (5) kaolin colloid and the boehmite slurries that step (3) and (4) are obtained obtain Cracking catalyst matrix colloid with the mixer rapid mixing, and the matrix colloid is sent into the continuous ageing reactor heat up aging continuously; (6) the desired molecule sieve is made slurries with sand mill or other milling apparatus; (7) matrix colloid and the molecular sieve pulp mechanical mixture after will wearing out, gained colloid spray-drying makes catalyst prod.
In the method for the invention, the former powder of kaolin that leaves in the field tank generally is the mixture of kaolin fine powder and kaolin piece, and wherein the diameter of kaolin piece is generally 2-5cm.The present invention selects for use disintegrating apparatus that the kaolin original soil is carried out fragmentation, is crushed to average grain diameter less than 150 μ m, can regulate according to design output and selected equipment as for broken time and inlet amount.
In the method for the invention, kaolin fine powder after boehmite dry powder and the fragmentation is delivered to different humidifying equipments with screw rod conveyor respectively, and the feeding speed of conveyer can be as required controlled charging rate by the conveyer of selecting different size for use or the mode of frequency control.
In the method for the invention, humidifying equipment is made up of intermeshing two plate gear dishes up and down, and the kaolin fine powder after the fragmentation is evenly added by the upper strata gear, liquid material, and for example chemical water, hydrochloric acid or nitric acid etc. add in the middle of gear.Kaolin fine powder and liquid material are mixed into kaolin colloid fast, equably during the gear rotation.The solid content of kaolin colloid can be regulated between the heavy % of 10-50, improves solid content as need, can add depolymerizing agent such as POLYPROPYLENE GLYCOL etc. in right amount.
Humidifying equipment of the present invention, mixing apparatus can be selected the general mixing apparatus that is suitable for catalyst preparation process for use, and also can select application number for use is fluid continuous mixing device related in the Chinese patent application file of 03122847.X.This blender comprises with lower member: inlet tube, spindle, mixer case, mixed rotor, transmission device, discharging opening, wherein, the coaxial setting of spindle, mixer case and mixed rotor; Described spindle and mixed rotor all comprise the spindle tooth or the rotor tooth of 2-20 layer different-diameter, and described spindle tooth layer and rotor tooth layer radially being staggered along this blender; Described spindle tooth layer and rotor tooth layer all comprise 6-40 combination tooth, and along with the progressively increase of spindle tooth layer and rotor tooth layer diameter, the angle of adjacent rotors tooth and spindle tooth reduces gradually.
The humidification process of the humidification of boehmite of the present invention and kaolin fine powder is basic identical, and boehmite dry powder and chemical water obtain the boehmite slurries after humidification mixes.
The said mixing of the present invention is meant that slurries, slurries and the powder with two or more joins in the mixer according to certain proportioning, obtains the uniform slurry of character after the mixing.
The said disintegrating apparatus of the present invention is the common apparatus that is used for the particle fragmentation, can be the disintegrating apparatus of Raymond mill, beater grinder, centrifugal mill, airslide disintegrating mill or other pattern.In the Preparation of Catalyst flow process, use the purpose of this equipment to be the former powder of kaolin is crushed to average grain diameter less than 150 μ m.
The said screw rod conveyor of the present invention is the screw conveyor that is used for the conveying solid substance powder, can be the solid powder conveying equipment of single screw rod conveyor, double-screw conveyor, guiding valve or other form, and its basic demand is that feeding is steady, frequency control.
The said humidifier of the present invention comprises two parts, i.e. solid powder continuous metering system and solid-liquid mixing apparatus.Its charging rate all must reach certain requirement to guarantee to obtain the slurries that solid content is even, flow is consistent with precision.
The said liquid material with kaolin fine powder and boehmite dry powder blend of the present invention is that the needs according to the Cracking catalyst factory formula add, and can be in decationized Y sieve water, deionized water, hydrochloric acid, nitric acid, phosphoric acid or other additive one or more.
The following examples will give further instruction to method provided by the invention, but not thereby limiting the invention.The equipment that is adopted among the embodiment is as follows: single screw rod conveyor is that Yangzhou machinery head factory is produced, and its model is the ET-20-5 type; The powder humidifier is the FY-02S type mixing apparatus (containing metering system) that Zhejiang Xinle instrument factory is produced; Disintegrating apparatus is that the screw type crusher model of Zhejiang Xinle instrument factory production is XY-7; Mixer is that application number is the related fluid continuous mixing device of Chinese patent application of 03122847.X; The molecular sieve milling apparatus is the PMC12 that Drais Mannheim factory produces, the 5TEX sand Mill.
Embodiment 1
This embodiment explanation: the implementation result of method for preparing catalyst provided by the present invention.
Select kaolin original soil 97.4kg for use, solid content is 77 heavy %, boehmite dry powder 57.7kg, solid content is 65 heavy %, molecular sieve 38.3kg, solid content 98 heavy %, design catalyst colloid solid content is 22 heavy %, and the hydrochloric acid addition is final kaolin colloid PH=1.0.
Kaolin is evenly sent into disintegrating machine XY-7 with single screw rod conveyor ET-20-5, kaolin becomes fine powder behind the continuous crushing, the average grain particle diameter is 142 ц m, in shattering process, the kaolin fine powder utilizes the loading hopper of gravity inflow FY-02S humidifier metering system, simultaneously, open measuring pump the mixed liquor of hydrochloric acid and chemical water is sent into humidifier, humidifier is started working and is obtained kaolin colloid, and after 1 hour, colloid for preparing finishes.With the FY-02S humidifier boehmite dry powder and chemical water are mixed and made into the boehmite slurries, the operating time is 1 hour.The boehmite slurries are mixed with mixer continuously with kaolin colloid obtain the catalyst substrates colloid, send into the aging still of serialization, aging, discharging continuously heat up, molecular sieve pulp rapid mixing after discharging opening installation mixer makes the colloid after wearing out and grinds enters the spray drying system drying and moulding.
The pH value of the colloid that detection obtains, solid content and average grain diameter, relevant test data is referring to table 1.
Table 1
| The test event time (minute) | 10 | 20 | 30 | 40 | 50 |
| PH value | 1.00 | 0.98 | 1.00 | 1.00 | 1.00 |
| Kaolin colloid solid content (heavy %) | 22.10 | 21.80 | 22.00 | 22.02 | 22.00 |
| Kaolin average grain diameter (ц m) | 2.34 | 2.56 | 2.46 | 2.12 | 2.38 |
| Mix back colloid solid content (heavy %) * with the boehmite slurries | 22.00 | 22.30 | 22.00 | 21.90 | 22.00 |
| Mix back average grain diameter (ц m) with the boehmite slurry | 3.84 | 3.56 | 4.29 | 4.12 | 3.98 |
Embodiment 2
This embodiment explanation: the implementation result of method for preparing catalyst provided by the present invention.
Select kaolin original soil 97.4kg for use, solid content is 77 heavy %, boehmite dry powder 57.7kg, solid content is 65 heavy %, molecular sieve 38.3kg, solid content 98 heavy %, design catalyst colloid solid content is 35 heavy %, and the hydrochloric acid addition is final kaolin colloid PH=1.0.
Kaolin is evenly sent into disintegrating machine XY-7 with single screw rod conveyor ET-20-5, kaolin becomes fine powder behind the continuous crushing, the average grain particle diameter is 129 ц m, in shattering process, the kaolin fine powder utilizes the loading hopper of gravity inflow FY-02S humidifier metering system, simultaneously, open measuring pump the mixed liquor of hydrochloric acid and chemical water is sent into humidifier, humidifier is started working and is obtained kaolin colloid, and after 40 minutes, colloid for preparing finishes.With the FY-02S humidifier boehmite dry powder and chemical water are mixed and made into the boehmite slurries, the operating time is similarly 40 minutes.The boehmite slurries are mixed continuously with kaolin colloid obtain the catalyst substrates colloid, send into the aging still of serialization, continuous heat up aging, discharging, the molecular sieve pulp rapid mixing after discharging opening installation mixer makes the colloid after wearing out and grinds enters the spray drying system drying and moulding.
The pH value of the colloid that detection obtains, solid content and average grain diameter, relevant test data is referring to table 2.
Table 2
| The test event time (minute) | 5 | 10 | 20 | 40 |
| PH value | 1.00 | 0.98 | 1.00 | 1.00 |
| Kaolin colloid solid content (heavy %) | 35.20 | 35.00 | 35.10 | 35.30 |
| Kaolin average grain diameter (ц m) | 2.56 | 2.56 | 2.12 | 2.28 |
| Mix back colloid solid content (heavy %) with the boehmite slurries | 37.00 | 36.80 | 36.50 | 36.70 |
| Mix back average grain diameter (ц m) with the boehmite slurry | 3.84 | 3.56 | 4.29 | 4.12 |
* because molecular sieve is difficult to the solid content grinding according to 35 heavy %, reach required average grain diameter, therefore, kaolin according to the heavy % of solid content 35 become glue, boehmite mixes with chemical water according to solid content 40 heavy %, both mix and mix with molecular sieve pulp after (the design solid content is 36.66 heavy %) wears out again, and obtain the final catalyst colloid.
Comparative Examples 1
Select kaolin original soil 97.4kg for use, solid content is 77 heavy %, boehmite dry powder 57.7kg, solid content is 65 heavy %, molecular sieve 38.3kg, solid content 98 heavy %, design catalyst colloid solid content is 25 heavy %, and the hydrochloric acid addition is final kaolin colloid PH=1.0.
In the reactor of 200L, add chemical water, kaolin is slowly added, the reinforced back making beating 30 minutes that finishes, slowly add hydrochloric acid and continuous sample analysis slurries pH value until PH=1.0, continue making beating and obtained kaolin colloid in 45 minutes, sample analysis: the colloid solid content is 18 heavy %, and the particle average grain diameter is 2.19 ц m; Boehmite dry powder slowly joined in the reactor continue making beating 40 minutes, sample analysis: the colloid solid content is 30 heavy %, and the particle average grain diameter is 4.19 ц m; The aging back adding molecular sieve pulp that heats up mixes, and spray-drying obtains catalyst prod.
Claims (5)
1, a kind of production of cracking catalyst is characterized in that this method may further comprise the steps: (1) kaolin raw material, boehmite raw material transport the preparation scene to container, and in the corresponding storage tank of packing into; (2) be the fine powder of average grain diameter with kaolin raw material Mechanical Crushing less than 150 μ m; (3) kaolin fine powder, decationized Y sieve water and hydrochloric acid are sent into humidifying equipment and are prepared into colloid; (4) boehmite is made the boehmite slurries by humidifying equipment; (5) kaolin colloid is mixed with the boehmite slurries and is obtained the matrix colloid, and it is aging to continue to heat up; (6) the matrix colloid after aging is with after molecular sieve pulp fully mixes, and spray-drying makes catalyst prod.
2,, it is characterized in that described kaolin fine powder and boehmite raw material are delivered to subsequent step by single screw rod conveyor, double-screw conveyor or guiding valve according to the method for claim 1.
3,, it is characterized in that described humidifying equipment comprises solid powder continuous metering system and solid-liquid mixing apparatus two parts according to the method for claim 1.
4,, it is characterized in that described kaolinic fragmentation selects for use: any in Raymond mill, beater grinder, screw type crusher, airslide disintegrating mill or the centrifugal mill according to the method for claim 1.
5,, it is characterized in that described molecular sieve pulp is that molecular sieve is prepared from through sand milling or grinding according to the method for claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03149932 CN1247304C (en) | 2003-07-31 | 2003-07-31 | Method for preparing cracking catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03149932 CN1247304C (en) | 2003-07-31 | 2003-07-31 | Method for preparing cracking catalyst |
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| Publication Number | Publication Date |
|---|---|
| CN1580195A CN1580195A (en) | 2005-02-16 |
| CN1247304C true CN1247304C (en) | 2006-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03149932 Expired - Lifetime CN1247304C (en) | 2003-07-31 | 2003-07-31 | Method for preparing cracking catalyst |
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| CN (1) | CN1247304C (en) |
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- 2003-07-31 CN CN 03149932 patent/CN1247304C/en not_active Expired - Lifetime
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