CN109179461A - A kind of low sodium boehmite and preparation method thereof, device - Google Patents
A kind of low sodium boehmite and preparation method thereof, device Download PDFInfo
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- CN109179461A CN109179461A CN201811093173.7A CN201811093173A CN109179461A CN 109179461 A CN109179461 A CN 109179461A CN 201811093173 A CN201811093173 A CN 201811093173A CN 109179461 A CN109179461 A CN 109179461A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
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Abstract
The present invention provides a kind of preparation methods of low sodium boehmite.Pseudoboehmite slurry is added in adhesive tape filter after being filtered and washed and is added in the first filter cake slot, third filtrate is added and water purification agent is stirred and washed, then filters pressing obtains the second filtrate；Second filter cake is added in the second filter cake slot, hot water is added and water purification agent is stirred and washed, then filters pressing obtains low sodium boehmite filter cake.Device includes adhesive tape filter, the first filter cake slot, the first filter press, the second filter cake slot, and the second filter press is sequentially connected.Water purification agent will be segmented and be added twice, reduce the sodium ions content (i.e. alkali content) in product using the faintly acid of water purification agent, but do not have an impact to other technical indicators of product.And water purification agent is easier to obtain, and the amount being added is seldom, and increased cost can be ignored, remarkable in economical benefits.In the case where not increasing hot wash-water (or increasing seldom hot water), the content of sodium ion in product can be more greatly washed off.
Description
Technical field
The present invention relates to boehmite technical fields, more particularly to a kind of low sodium boehmite and its preparation side
Method, device.
Background technique
The washing process of common boehmite, process flow as shown in Figure 1, by adhesive tape filter be filtered with
Washing, then be qualified filter cake, Na after being washed by filter press2O% is lower than 0.3%.It is mainly used in petroleum catalyst
Refining catalytic cracking catalyst and binder, catalyst preparation produced come out oil quality be not too high, and by
In sodium content height, the requirement at present to environmental protection is not achieved.
It is correspondingly higher and higher to the quality requirements of oil as Environmental protection is increasingly paid attention to, it is quasi- to research and develop low sodium
Boehmite is the essential catalyst of the high-end petroleum catalyst of production and carrier.In the prior art, thin water is intended for low sodium
The production of aluminium stone is mainly realized by increasing slurry amount and increase washing times.Its required slurry amount is
3~5 times of normal product wash water dosage, and soda index (Na2O% content) requirement of index is often not achieved.
Based on this, the prior art still has much room for improvement.
Summary of the invention
Present invention technical problem to be solved is to provide a kind of low sodium boehmite and preparation method thereof, device, with solution
Certainly problem of the prior art.
To solve the above-mentioned problems, the present invention provides a kind of low sodium boehmite and preparation method thereof, device, takes
Technical solution it is as follows:
Implementation of the invention discloses a kind of preparation method of low sodium boehmite, comprising:
Pseudoboehmite slurry is added in adhesive tape filter and is filtered and washed by step 1, obtains the first filtrate and the
One filter cake；
First filter cake is added in the first filter cake slot step 2, while third filtrate is added and water purification agent is stirred
It washes, obtains stirring washing pulp；
Step 3 will stir the slurries after washing and carry out filters pressing with filter press is pumped into, and obtain the second filtrate and the second filter cake；
Second filter cake is added in the second filter cake slot step 4, and hot water is added and water purification agent stir washing, then send
Third filtrate and low sodium boehmite filter cake are obtained to another filter press filters pressing.
Further, the third filtrate is added in the first filter cake slot and is used as cleaning solution.
Further, second filtrate is added in adhesive tape filter and washs filter cake.
Further, the water purification agent includes the mixing of one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid
Object.
Further, in step 2, the additional amount of the water purification agent is 2~10kg/T- boehmite.
Further, in step 4, the additional amount of the water purification agent is 2~20kg/T- boehmite.
Further, in step 4, the additional amount of the water is 30~50m3/ T- boehmite.
Present invention implementation also discloses a kind of device for preparing low sodium boehmite, comprising:
Adhesive tape filter, the adhesive tape filter are provided with pseudoboehmite slurry import, the first filtrate (liquid and first
Filtered solid outlet；
First filter cake slot is provided with water purification agent entrance on the first filter cake slot, is connected to first filtered solid outlet
First filter cake import, is provided with agitating device at the outlet of the first stirring slurry.
First filter press is provided with stirring slurry entrance, the second filtrate (liquid and the second filter cake on first filter press
Outlet, filter press stirring slurry entrance are connected to the outlet of filter cake slot stirring slurry；
Second filter cake slot is provided with water purification agent entrance, hot water inlet on the second filter cake slot, goes out with second filter cake
The import and the outlet of the second stirring slurry of mouth connection are provided with agitating device.
Second filter press is provided with the second stirring with the second stirring slurry outlet on second filter press
Injection point, third filtrate (liquid and low sodium boehmite filtered solid outlet.
Further, be additionally provided with third filtrate import on the first filter cake slot, the third filtrate (liquid with it is described
It is connected by pump with third filtrate receiver between third filtrate import；
Be additionally provided with the second filtrate import on the adhesive tape filter, second filtrate (liquid and second filtrate into
It is connected by pump with the second filtrate receiver between mouthful.
The embodiment of the invention also discloses a kind of low sodium boehmites, are made by above-mentioned method.
The beneficial effects of the present invention are:
Water purification agent is added by segmentation in the present invention twice, and the sodium ions content in product is reduced using the faintly acid of water purification agent
(i.e. alkali content), but other technical indicators of product are not had an impact.And water purification agent is easier to obtain, and the amount being added is very
Few, increased cost can be ignored, remarkable in economical benefits.Do not increasing hot wash-water (or increasing seldom hot water)
In the case of, it can more greatly wash off the content of sodium ion in product.
Detailed description of the invention
Fig. 1 is the process schematic representation of the prior art of the present invention；
Fig. 2 is further embodiment of this invention process flow chart.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.
As shown in Fig. 2, present invention implementation discloses a kind of preparation method of low sodium boehmite comprising:
Pseudoboehmite slurry is added in adhesive tape filter and is filtered and washed by step 1, obtains the first filtrate and the
One filter cake；
First filter cake is added in the first filter cake slot step 2, while third filtrate is added and water purification agent is stirred
It washes, obtains stirring washing pulp；
Step 3 will stir the slurries after washing and carry out filters pressing with filter press is pumped into, and obtain the second filtrate and the second filter cake；
Second filter cake is added in the second filter cake slot step 4, and hot water is added and water purification agent stir washing, then send
Third filtrate and low sodium boehmite filter cake are obtained to another filter press filters pressing.
This implementation reduces the alkali content in product using the faintly acid of water purification agent, does not generate to other technical indicators of product
It influences.And the amount being added is seldom, and increasing cost can be ignored, remarkable in economical benefits.The addition of water purification agent is divided into two
Secondary segmentation is added, and the ratio of addition carries out according to a certain percentage, and effect is fine.Segmentation be added water purification agent carry out back flush when its
Washing lotion is washed with boehmite again again, can the lower removal for reducing intermolecular alkali.Water purification agent and anti-is added in segmentation
To washing, in the case where not increasing slurry, the content of sodium ion in product can be more greatly washed off.
Preferably, the third filtrate is added in the first filter cake slot and is used as cleaning solution.It is further preferred that by described
Two filtrates are added in adhesive tape filter and wash filter cake.
In above-described embodiment, the water purification agent includes one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid
Mixture.
In above-described embodiment, in step 2, the additional amount of the water purification agent is 2~10kg/T- boehmite.Step 4
In, the additional amount of the water purification agent is 2~20kg/T- boehmite.The additional amount of the water is 30~50m3/ T- intends thin water
Aluminium stone.
The embodiment of the invention also discloses a kind of devices for preparing low sodium boehmite comprising:
Adhesive tape filter, the adhesive tape filter are provided with pseudoboehmite slurry import, the first filtrate (liquid and first
Filtered solid outlet；
First filter cake slot is provided with water purification agent entrance on the first filter cake slot, is connected to first filtered solid outlet
First filter cake import, is provided with agitating device at the outlet of the first stirring slurry.
First filter press is provided with stirring slurry entrance, the second filtrate (liquid and the second filter cake on first filter press
Outlet, filter press stirring slurry entrance are connected to the outlet of filter cake slot stirring slurry；
Second filter cake slot is provided with water purification agent entrance, hot water inlet on the second filter cake slot, goes out with second filter cake
The import and the outlet of the second stirring slurry of mouth connection are provided with agitating device.
Second filter press is provided with the second stirring with the second stirring slurry outlet on second filter press
Injection point, third filtrate (liquid and low sodium boehmite filtered solid outlet.
As the preferred of above-described embodiment, third filtrate import, the third filter are additionally provided on the first filter cake slot
By pumping and being connected with third filtrate receiver between liquid outlet and the third filtrate import.It is further preferred that the adhesive tape mistake
It is additionally provided with the second filtrate import on filter, passes through pump and second between second filtrate (liquid and the second filtrate import
Filtrate receiver connection.
The washing of method and apparatus disclosed in above embodiments, low sodium boehmite is washed in common boehmite
On the basis of increase and once stir and wash, washing lotion, which is backwards on sealing-tape machine, washs filter cake.It is separately added into not during stirring wash twice
With the water purification agent of dosage.The water purification agent large percentage being added in second filter cake slot, primarily to more using the acid of water purification agent
Radical ion and the intermolecular sodium ion of boehmite combine, and are more soluble in water and reduce the sodium content in product.Water purification is added
It is easy to reduce the content of sodium in product after agent, but washing is not increased or increased less with hot water amount.Hot-water consumption is by 35
~40m3/ T increases to 40~45m3/T.If not having to water purification agent makees water purification agent, the consumption of hot water will increase 100m3/ T or more,
And the sodium ions content in product is not easy to be reduced to 0.1% or less.The dosage of the water purification agent of addition product per ton be 5~
100Kg, increasing cost is about 50~500 yuan/T, thus increased cost is seldom.Product increased leaching requirement about 0~10T/T,
Increase about 0~70 yuan/T of cost.Thus ton cost increase is few.It is available that the increased filter press in scene and one stir washing trough
The filter press for the recycling mother liquor being completed in original design is transformed, and improvement cost is lower.
Embodiment 1
Pseudoboehmite slurry is separated and washed with being pumped on adhesive tape filter, the first filtrate and first are obtained
Filter cake, the first filtrate are sent into alumina producing system, are discharged into the first filter cake slot after the first filter cake is washed and stir washing,
Unload and water purification agent be proportionally added into the first filter cake slot according to the amount of being discharged into of filter cake during filter cake, water purification agent be include carbon
One or more of acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, additional amount are 2~10kg/T- boehmite
(additional amount of boehmite i.e. per ton is 2-10Kg).Then washing pulp will be stirred and carry out filters pressing with being pumped into filter press, obtained
To the second filtrate and the second filter cake, the second filtrate is sent to adhesive tape filter washing filter cake, and the second filter cake is discharged into the second filter cake slot
Continue to stir and wash, new water is added in the second filter cake slot, and adds a certain amount of water purification agent during stirring and washing and washed
Wash, water purification agent be include one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, additional amount is 2~
20kg/T- boehmite, then filters pressing, the filter pump of filters pressing squeeze into the first filter cake slot and carry out back flush.Filter cake is
Na2The low sodium boehmite filter cake of O% qualification.Detecting its sodium ions content is less than 0.1%.
Embodiment 2
Pseudoboehmite slurry is separated and washed with being pumped on adhesive tape filter, the first filtrate and first are obtained
Filter cake, the first filtrate are sent into alumina producing system, are discharged into the first filter cake slot after the first filter cake is washed and stir washing,
Unload and water purification agent be proportionally added into the first filter cake slot according to the amount of being discharged into of filter cake during filter cake, water purification agent be include carbon
One or more of acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, additional amount are that 2kg/T- boehmite is (i.e. every
The additional amount of ton boehmite is 2Kg).Then washing pulp will be stirred and carry out filters pressing with being pumped into filter press, obtain the second filter
Liquid and the second filter cake, the second filtrate are sent to adhesive tape filter washing filter cake, and the second filter cake, which is discharged into the second filter cake slot, to be continued
It stirs and washes, new water is added in the second filter cake slot, and add a certain amount of water purification agent during stirring and washing and washed, water purification agent
Being includes one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, and additional amount is that 2kg/T- intends thin water aluminium
Stone, then filters pressing, the filter pump of filters pressing squeeze into the first filter cake slot and carry out back flush.Filter cake is Na2The low sodium of O% qualification is quasi-
Boehmite filter cake.Detecting its sodium ions content is less than 0.1%.
Embodiment 3
Pseudoboehmite slurry is separated and washed with being pumped on adhesive tape filter, the first filtrate and first are obtained
Filter cake, the first filtrate are sent into alumina producing system, are discharged into the first filter cake slot after the first filter cake is washed and stir washing,
Unload and water purification agent be proportionally added into the first filter cake slot according to the amount of being discharged into of filter cake during filter cake, water purification agent be include carbon
One or more of acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, additional amount are that 10kg/T- boehmite is (i.e. every
The additional amount of ton boehmite is 10Kg).Then washing pulp will be stirred and carry out filters pressing with being pumped into filter press, obtain the second filter
Liquid and the second filter cake, the second filtrate are sent to adhesive tape filter washing filter cake, and the second filter cake, which is discharged into the second filter cake slot, to be continued
It stirs and washes, new water is added in the second filter cake slot, and add a certain amount of water purification agent during stirring and washing and washed, water purification agent
Being includes one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, and additional amount is that 20kg/T- intends thin water
Aluminium stone, then filters pressing, the filter pump of filters pressing squeeze into the first filter cake slot and carry out back flush.Filter cake is Na2The low sodium of O% qualification
Boehmite filter cake.Detecting its sodium ions content is less than 0.1%.
Embodiment 4
Pseudoboehmite slurry is separated and washed with being pumped on adhesive tape filter, the first filtrate and first are obtained
Filter cake, the first filtrate are sent into alumina producing system, are discharged into the first filter cake slot after the first filter cake is washed and stir washing,
Unload and water purification agent be proportionally added into the first filter cake slot according to the amount of being discharged into of filter cake during filter cake, water purification agent be include carbon
One or more of acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, additional amount are that 6kg/T- boehmite is (i.e. every
The additional amount of ton boehmite is 6Kg).Then washing pulp will be stirred and carry out filters pressing with being pumped into filter press, obtain the second filter
Liquid and the second filter cake, the second filtrate are sent to adhesive tape filter washing filter cake, and the second filter cake, which is discharged into the second filter cake slot, to be continued
It stirs and washes, new water is added in the second filter cake slot, and add a certain amount of water purification agent during stirring and washing and washed, water purification agent
Being includes one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, and additional amount is that 12kg/T- intends thin water
Aluminium stone, then filters pressing, the filter pump of filters pressing squeeze into the first filter cake slot and carry out back flush.Filter cake is Na2The low sodium of O% qualification
Boehmite filter cake.Detecting its sodium ions content is less than 0.1%.
Embodiment 5
Pseudoboehmite slurry is separated and washed with being pumped on adhesive tape filter, the first filtrate and first are obtained
Filter cake, the first filtrate are sent into alumina producing system, are discharged into the first filter cake slot after the first filter cake is washed and stir washing,
Unload and water purification agent be proportionally added into the first filter cake slot according to the amount of being discharged into of filter cake during filter cake, water purification agent be include carbon
One or more of acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, additional amount are that 2kg/T- boehmite is (i.e. every
The additional amount of ton boehmite is 10Kg).Then washing pulp will be stirred and carry out filters pressing with being pumped into filter press, obtain the second filter
Liquid and the second filter cake, the second filtrate are sent to adhesive tape filter washing filter cake, and the second filter cake, which is discharged into the second filter cake slot, to be continued
It stirs and washes, new water is added in the second filter cake slot, and add a certain amount of water purification agent during stirring and washing and washed, water purification agent
Being includes one or more of carbonic acid, ammonium hydrogen carbonate, acetic acid, oxalic acid, phosphoric acid mixture, and additional amount is that 15kg/T- intends thin water
Aluminium stone, then filters pressing, the filter pump of filters pressing squeeze into the first filter cake slot and carry out back flush.Filter cake is Na2The low sodium of O% qualification
Boehmite filter cake.Detecting its sodium ions content is less than 0.1%.
The alkali content of boehmite product of the present invention is reduced to 0.07% by 0.25% or so original (being lower than 0.3%)
Left and right (is lower than 0.1%), and other indexs are constant.By the way that water purification agent is added and increases a back flush process, wash water dosage
The 20% of normal product water consumption not being exceeded, and washing effect is preferable, the amount that water purification agent is added is seldom, and price is not also high,
Increase cost 10%~15%.But its price is 1.5 times of common product, and economic benefit is very good.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of preparation method of low sodium boehmite characterized by comprising
Pseudoboehmite slurry is added in adhesive tape filter and is filtered and washed by step 1, obtains the first filtrate and the first filter
Cake；
First filter cake is added in the first filter cake slot step 2, while third filtrate is added and water purification agent stir washing, and obtains
To stirring washing pulp；
Step 3 will stir the slurries after washing and carry out filters pressing with filter press is pumped into, and obtain the second filtrate and the second filter cake；
Second filter cake is added in the second filter cake slot step 4, and hot water is added and water purification agent stir washing, and is then delivered to another
One filter press filters pressing obtains third filtrate and low sodium boehmite filter cake.
2. being washed the method according to claim 1, wherein the third filtrate is added to be used as in the first filter cake slot
Wash liquid.
3. being filtered the method according to claim 1, wherein second filtrate is added to wash in adhesive tape filter
Cake.
4. the method according to claim 1, wherein the water purification agent includes carbonic acid, ammonium hydrogen carbonate, acetic acid, grass
One or more of acid, phosphoric acid mixture.
5. the method according to claim 1, wherein
In step 2, the additional amount of the water purification agent is 2~10kg/T- boehmite.
6. method according to claim 1 or 5, which is characterized in that
In step 4, the additional amount of the water purification agent is 2~20kg/T- boehmite.
7. the method according to claim 1, wherein the additional amount of hot water is 30~50m in step 43/ T- is quasi-
Boehmite.
8. a kind of device for preparing low sodium boehmite characterized by comprising
Adhesive tape filter, the adhesive tape filter are provided with pseudoboehmite slurry import, the first filtrate (liquid and the first filter cake
Outlet；
First filter cake slot, first for being provided with water purification agent entrance, being connected to first filtered solid outlet on the first filter cake slot
Filter cake import, is provided with agitating device at the outlet of the first stirring slurry.
First filter press is provided with stirring slurry entrance, the second filtrate (liquid and the second filtered solid outlet on first filter press,
Filter press stirring slurry entrance is connected to the outlet of filter cake slot stirring slurry；
Second filter cake slot is provided with water purification agent entrance, hot water inlet on the second filter cake slot, connects with second filtered solid outlet
Logical import and the outlet of the second stirring slurry are provided with agitating device.
Second filter press is provided with the second stirring slurry with the second stirring slurry outlet on second filter press
Entrance, third filtrate (liquid and low sodium boehmite filtered solid outlet.
9. device according to claim 8, which is characterized in that
Be additionally provided with third filtrate import on the first filter cake slot, the third filtrate (liquid and the third filtrate import it
Between by pump connected with third filtrate receiver；
Be additionally provided with the second filtrate import on the adhesive tape filter, second filtrate (liquid and the second filtrate import it
Between by pump connected with the second filtrate receiver.
10. a kind of low sodium boehmite, which is characterized in that the method as described in all items of claim 1~7 is made.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811093173.7A CN109179461B (en) | 2018-09-19 | 2018-09-19 | Low-sodium pseudo-boehmite, preparation method and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811093173.7A CN109179461B (en) | 2018-09-19 | 2018-09-19 | Low-sodium pseudo-boehmite, preparation method and device thereof |
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| CN109179461B CN109179461B (en) | 2021-03-23 |
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Cited By (5)
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| CN109626404A (en) * | 2019-01-28 | 2019-04-16 | 云南文山铝业有限公司 | The washing methods of boehmite |
| CN110540222A (en) * | 2019-08-30 | 2019-12-06 | 中国铝业股份有限公司 | Preparation method of high-temperature-resistant activated alumina |
| CN110540222B (en) * | 2019-08-30 | 2022-04-19 | 中国铝业股份有限公司 | Preparation method of high-temperature-resistant activated alumina |
| CN114524444A (en) * | 2020-10-31 | 2022-05-24 | 中国石油化工股份有限公司 | Modification method of aluminum oxide |
| CN114524444B (en) * | 2020-10-31 | 2024-02-09 | 中国石油化工股份有限公司 | Modification method of alumina |
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