CN109626403A - A kind of boehmite production and processing method - Google Patents
A kind of boehmite production and processing method Download PDFInfo
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- CN109626403A CN109626403A CN201910042717.5A CN201910042717A CN109626403A CN 109626403 A CN109626403 A CN 109626403A CN 201910042717 A CN201910042717 A CN 201910042717A CN 109626403 A CN109626403 A CN 109626403A
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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
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- Life Sciences & Earth Sciences (AREA)
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a kind of boehmite production and processing methods, it is related to boehmite production field, it chooses aluminum-containing raw material and is put into reaction kettle and be stirred, it is continuously added alkali into reaction kettle at normal temperatures and pressures and is stirred precipitation precipitating, the precipitating and reaction solution that are precipitated in reaction kettle are separated by being separated by solid-liquid separation, liquid after separation is added, kettle is precipitated, it adjusts and kettle is precipitated to certain temperature and air pressure, solid after secondary precipitation is precipitated is obtained by vacuum filtration, waste liquid exhausts, precipitating will be precipitated and secondary precipitation precipitating is washed, it removes extra foreign ion and obtains pure filter cake, pure filter cake is purged by high-pressure extrusion and air, improve the content of aluminium oxide, be milled packaging after filtration cakes torrefaction.Beneficial effect is: raw material is utilized by the precipitation of secondary the different temperatures environment and air pressure of sediment in the present invention to the greatest extent, and by high-pressure extrusion and purging, improves the content of aluminium oxide.
Description
Technical field
The present invention relates to boehmite production field is related to, more particularly to a kind of boehmite production and processing side
Method.
Background technique
Boehmite can make the binder of semi-synthetic rare earth Y type molecular sieve Cracking catalyst, aluminosilicate refractory fiber
Binder, dehydration of alcohol catalyst for making ethylene and goes back oxidative ethane catalyst etc., and alumina powder is often used in making in chemical field
For desiccant, adsorbent, catalyst and catalyst carrier.But the water aluminium oxide naturally or manually produced and three water oxygens
The specific surface area of aluminium is low, Kong Rong little, activity are low, thus cannot be used to do desiccant, adsorbent, catalyst and catalyst carrier.
Boehmite has the characteristics that high-specific surface area, macropore appearance, large aperture, high activity, is suitable for making desiccant, adsorbent and stone
The catalyst in the fields such as oiling work, chemical fertilizer and tail gas and catalyst carrier etc., therefore, it is necessary to by a water aluminium oxide or three water oxygens
Aluminium is converted into boehmite, and crystallization degree of pseudo-boehmite is low, and water content is higher than boehmite, often exists with colloidal state.Currently, quasi-
The production method of boehmite mainly includes aluminium alcoholates Hydrolyze method, acid system and alkaline process (carbonizatin method), and China mainly uses carbonizatin method raw
Boehmite is produced, but carbonizatin method production has a big defect, carbonization sword method precipitation precipitating is very big by the limit of environmental factor,
Temperature is higher, and precipitation is lower, can be slack-off but turn down temperature speed of separating out.
Summary of the invention
The object of the invention is that providing a kind of boehmite production and processing method to solve the above-mentioned problems.
The present invention through the following technical solutions to achieve the above objectives:
A kind of boehmite production and processing method, which comprises the following steps:
Step 1: it chooses aluminum-containing raw material and being put into reaction kettle and is stirred；
Step 2: it is continuously added alkali into reaction kettle at normal temperatures and pressures and is stirred precipitation precipitating；
Step 3: the precipitating and reaction solution that are precipitated in reaction kettle are separated by being separated by solid-liquid separation；
Step 4: the liquid after separation being added, kettle be precipitated, and adjusts and kettle is precipitated to certain temperature and air pressure, by secondary analysis
Solid after precipitating out is obtained by vacuum filtration, and waste liquid exhausts；
Step 5: the precipitation precipitating in step 2 and the secondary precipitation precipitating in step 4 are washed, it is extra to remove
Foreign ion obtain pure filter cake；
Step 6: pure filter cake is purged by high-pressure extrusion and air, improves the content of aluminium oxide；
Step 7: be milled packaging after filtration cakes torrefaction.
Further, precipitation kettle described in step 4 is the adjustable precipitation kettle of temperature, and the air pressure is evacuated to by vacuum pump
10-4 power megapascal, temperature are adjusted to 4-6 DEG C.
Further, precipitating is washed by deionized water in the step 5.
Further, aluminum-containing raw material described in step 1 is including but not limited in aluminum nitrate, aluminium chloride, aluminum sulfate and alum
One kind, the one kind of the alkali including but not limited to sodium hydroxide, ammonium hydroxide and sodium carbonate.
Further, drying temperature is 90-110 DEG C in step 7, and drying time is 2 hours.
Beneficial effect is: the present invention passes through the precipitation of secondary the different temperatures environment and air pressure of sediment, utmostly
Be utilized raw material, and by high-pressure extrusion and purging, improve the content of aluminium oxide.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
A kind of boehmite production and processing method, which comprises the following steps:
Step 1: it chooses aluminum-containing raw material and being put into reaction kettle and is stirred；
Step 2: it is continuously added alkali into reaction kettle at normal temperatures and pressures and is stirred precipitation precipitating；
Step 3: the precipitating and reaction solution that are precipitated in reaction kettle are separated by being separated by solid-liquid separation；
Step 4: the liquid after separation being added, kettle be precipitated, and adjusts and kettle is precipitated to certain temperature and air pressure, by secondary analysis
Solid after precipitating out is obtained by vacuum filtration, and waste liquid exhausts；
Step 5: the precipitation precipitating in step 2 and the secondary precipitation precipitating in step 4 are washed, it is extra to remove
Foreign ion obtain pure filter cake；
Step 6: pure filter cake is purged by high-pressure extrusion and air, improves the content of aluminium oxide；
Step 7: be milled packaging after filtration cakes torrefaction.
In the present embodiment, precipitation kettle described in step 4 is the adjustable precipitation kettle of temperature, and the air pressure passes through vacuum pump
10-4 power megapascal are evacuated to, temperature is adjusted to 4-6 DEG C.
In the present embodiment, precipitating is washed by deionized water in the step 5.
In the present embodiment, aluminum-containing raw material described in step 1 is including but not limited to aluminum nitrate, aluminium chloride, aluminum sulfate and bright
One of alum, the one kind of the alkali including but not limited to sodium hydroxide, ammonium hydroxide and sodium carbonate.
In the present embodiment, drying temperature is 90-110 DEG C in step 7, and drying time is 2 hours.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and equivalents circle
It is fixed.
Claims (5)
1. a kind of boehmite production and processing method, which comprises the following steps:
Step 1: it chooses aluminum-containing raw material and being put into reaction kettle and is stirred；
Step 2: it is continuously added alkali into reaction kettle at normal temperatures and pressures and is stirred precipitation precipitating；
Step 3: the precipitating and reaction solution that are precipitated in reaction kettle are separated by being separated by solid-liquid separation；
Step 4: the liquid after separation being added, kettle be precipitated, and adjusts and kettle is precipitated to certain temperature and air pressure, secondary precipitation is sunk
Solid behind shallow lake is obtained by vacuum filtration, and waste liquid exhausts；
Step 5: the precipitation precipitating in step 2 and the secondary precipitation precipitating in step 4 are washed, removed extra miscellaneous
Matter ion obtains pure filter cake；
Step 6: pure filter cake is purged by high-pressure extrusion and air, improves the content of aluminium oxide；
Step 7: be milled packaging after filtration cakes torrefaction.
2. a kind of boehmite production and processing method according to claim 1, it is characterised in that: analysed described in step 4
Kettle is the adjustable precipitation kettle of temperature out, and the air pressure is evacuated to 10-4 power megapascal by vacuum pump, and temperature is adjusted to 4-6 DEG C.
3. a kind of boehmite production and processing method according to claim 1, it is characterised in that: lead in the step 5
Deionized water is crossed to wash precipitating.
4. a kind of boehmite production and processing method according to claim 1, it is characterised in that: contain described in step 1
Aluminum feedstock is including but not limited to one of aluminum nitrate, aluminium chloride, aluminum sulfate and alum, and the alkali is including but not limited to hydroxide
One kind of sodium, ammonium hydroxide and sodium carbonate.
5. a kind of boehmite production and processing method according to claim 1, it is characterised in that: dry temperature in step 7
Degree is 90-110 DEG C, and drying time is 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910042717.5A CN109626403A (en) | 2019-01-17 | 2019-01-17 | A kind of boehmite production and processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910042717.5A CN109626403A (en) | 2019-01-17 | 2019-01-17 | A kind of boehmite production and processing method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708511A (en) * | 2013-12-19 | 2014-04-09 | 中国铝业股份有限公司 | Technology for producing pseudo-boehmite |
| CN108910925A (en) * | 2018-09-11 | 2018-11-30 | 淄博齐茂催化剂有限公司 | A kind of preparation method of boehmite |
| CN108910924A (en) * | 2018-09-11 | 2018-11-30 | 淄博齐茂催化剂有限公司 | A kind of precipitation energy conservation preparation method of boehmite |
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2019
- 2019-01-17 CN CN201910042717.5A patent/CN109626403A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708511A (en) * | 2013-12-19 | 2014-04-09 | 中国铝业股份有限公司 | Technology for producing pseudo-boehmite |
| CN108910925A (en) * | 2018-09-11 | 2018-11-30 | 淄博齐茂催化剂有限公司 | A kind of preparation method of boehmite |
| CN108910924A (en) * | 2018-09-11 | 2018-11-30 | 淄博齐茂催化剂有限公司 | A kind of precipitation energy conservation preparation method of boehmite |
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Application publication date: 20190416 |