CN101085822A - Method for preparing water-loss reducer from acrylamide and attapulgite - Google Patents
Method for preparing water-loss reducer from acrylamide and attapulgite Download PDFInfo
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- CN101085822A CN101085822A CN 200710015031 CN200710015031A CN101085822A CN 101085822 A CN101085822 A CN 101085822A CN 200710015031 CN200710015031 CN 200710015031 CN 200710015031 A CN200710015031 A CN 200710015031A CN 101085822 A CN101085822 A CN 101085822A
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Abstract
The invention relates to a method for preparing water-loss reducer. The technical project is as follows: (1) the raw material and the weight proportion are: acrylamide 50- 70%, attapulgite 30 -50%; (2) feeding raw material into adjusting autoclave, mixing for polymerizaiton, compressing the raw material into polymerization autoclave by using 0.1- 0.4 Mpa air force; (3) adding initiator under nitrogen gas protection, the initiator amount is 0.05- 2% of the total amount of raw material, curing after 30- 60 minutes polymerization, feeding product into pelleting machine and drying machine for granulation and drying. The invention is characterized by non- toxic product, complete closed production, no wastewater, wastegas and dust production during process, more stable product quality and increased production efficiency.
Description
Technical field
The present invention relates to the preparation method of water-holding agent, specifically is the method that a kind of acrylamide and attapulgite prepare water-holding agent.
Background technology
At present the preparation method of water-holding agent mainly with starch, Mierocrystalline cellulose or vinylformic acid as raw material, by after adding linking agent and initiator and carrying out copolymerization, crosslinking reaction, dry then and pulverizing (also claiming granulation) etc.Starch based water-holding agent shortcoming is gel-strength, salt tolerant alkali poor performance, and life cycle is short; The shortcoming of fiber-like water-holding agent is that water-absorbent is poor; And the acrylic acid or the like water-holding agent that comparatively generally uses at present adopts organic vinylformic acid and inorganics as raw material on raw material, be characterized in introducing the salt tolerant alkalescence that not only improves water-holding agent behind the inorganics, and cost is reduced.(number 03120346) discloses a kind of " organic-inorganic composite water retaining agent and preparation method thereof " as Chinese patent, its raw material is exactly the combination of having adopted vinylformic acid and attapulgite, add a spot of initiator and linking agent, reaction is 3-5 hour under the condition of 60-90 degree, and the performance index of product are enhanced.But the index of its absorption salt buck and gel-strength awaits to improve, and has the problem of air and dust pollution in actual application by its preparation method.
Summary of the invention
Purpose of the present invention is exactly the problem that exists at prior art, the method that provide that a kind of water retention property is higher, free of contamination acrylamide and attapulgite prepares water-holding agent in the production process.
Its technical scheme is:
(1) weight percent of raw material and raw material: acrylamide is 50～70%, and attapulgite is 30～50%;
(2), desired raw material is transported in the modulation kettle, in modulation kettle, carry out the mixing before the polymerization, utilize 0.1～0.4MPa air pressure again, it is sent in the polymeric kettle;
(3) after raw material enters into polymeric kettle; under protection of nitrogen gas, add initiator, the initiator addition is the 0.05-2% of raw material total amount; through carrying out slaking after 30～60 minutes the polyreaction, products therefrom is transported to carries out granulation and drying in tablets press and the moisture eliminator respectively then.
Described initiator comprises peroxide initiator and redox initiator.Mainly comprise: a kind of or arbitrary combination in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, Potassium Persulphate-ferrous sulfate, ammonium persulfate-sodium bisulfite, the hydrogen peroxide-ferrous sulfate.
The air pressure mode of movement is all adopted in the conveying of all raw materials and product, and described slaking is to carry out under the vapor pressure of 0.1MPa slaking 4-6 hour.
Adopt the water-holding agent the key technical indexes of the present invention's preparation: 300 ~ 1500 times of de-salted waters, 200 times in tap water, 60 ~ 100 times in physiological saline, in 0.1% the calcium chloride water 35 ~ 60 times; The gel-strength height, in whizzer 3000r/m after centrifugal 30 minutes water retention greater than 93%, but the pressure of holding capacity 250g ~ 500g/cm2; Nontoxic, be Green Product, its product is in the outstanding characteristic of salt tolerant alkali, for the improvement saltings provides good technical guarantee.Its technical characterstic: the mode that adopts air pressure transferring raw material and material in the whole process of production, the realization total closed type is produced, and does not have the discharging of waste water, waste gas and dust in the production process, makes that operation is more fast and simple, quality product is more stable, and production efficiency improves, production cost reduces.
Embodiment
Be described further below in conjunction with specific embodiment.
Embodiment 1:(1) weight percent of raw material and raw material: acrylamide is 70%, and attapulgite is 30%; (2), adopt the pressure pipeline of sealing to be transported in the modulation kettle desired raw material, in modulation kettle, carry out the mixing before the polymerization, utilize the 0.4MPa air pressure again after reaching requirement, it is sent in the polymeric kettle in the 0.4MPa air pressure; (3) after raw material enters into polymeric kettle, under protection of nitrogen gas, add hydrogen peroxide after 30 minutes as initiator, the initiator addition is 0.2% of a raw material total amount, after 30 minutes polyreaction, under the vapor pressure of 0.1MPa, carried out materials-stored box in the middle of then products therefrom (blob of viscose) being discharged into the air pressure of 0.4MPa slaking 4-6 hour; Behind the materials-stored box, under the 0.05MPa air pressure, colloid is transported in the tablets press in the middle of the blob of viscose that polymerization is good is discharged into, behind tablets press, big blob of viscose can be cut into small-particle after, enter moisture eliminator, in moisture eliminator with short grained blob of viscose drying.The water-holding agent particle that drying is finished is by the grinding of pulverizer, and the screening of vibratory screening apparatus, just can produce qualified water-holding agent product, can pack according to user's requirement then.
Embodiment 2:(1) weight percent of raw material and raw material: acrylamide is 50%, and attapulgite is 50%; (2), adopt the pressure pipeline of sealing to be transported in the modulation kettle desired raw material, in modulation kettle, carry out the mixing before the polymerization, utilize the 0.2MPa air pressure again after reaching requirement, it is sent in the polymeric kettle in the 0.2MPa air pressure; (3) after raw material enters into polymeric kettle, under protection of nitrogen gas, add hydrogen peroxide-ferrous sulfate as initiator after 30 minutes, the initiator addition is 0.5% of a raw material total amount, after 30 minutes polyreaction, under the vapor pressure of 0.1MPa, carried out materials-stored box in the middle of then products therefrom (blob of viscose) being discharged into the air pressure of 0.2MPa slaking 4-6 hour; Behind the materials-stored box, under the 0.05MPa air pressure, colloid is transported in the tablets press in the middle of the blob of viscose that polymerization is good is discharged into, behind tablets press, big blob of viscose can be cut into small-particle after, enter moisture eliminator, in moisture eliminator with short grained blob of viscose drying.The water-holding agent particle that drying is finished is by the grinding of pulverizer, and the screening of vibratory screening apparatus, just can produce qualified water-holding agent product, can pack according to user's requirement then.
According to the prompting of the foregoing description, as long as any numerical value and material in the scope that the present invention requires can both realize producing high performance water-holding agent product.
Claims (4)
1, a kind of acrylamide and attapulgite prepare the method for water-holding agent, it is characterized in that comprising:
(1) weight percent of raw material and raw material: acrylamide is 50～70%, and attapulgite is 30～50%;
(2) desired raw material is transported in the modulation kettle, in modulation kettle, carries out the mixing before the polymerization, utilize 0.1～0.4MPa air pressure again, it is sent in the polymeric kettle;
(3) after raw material enters into polymeric kettle; under protection of nitrogen gas, add initiator, the initiator addition is the 0.05-2% of raw material total amount; through carrying out slaking after 30～60 minutes the polyreaction, products therefrom is transported to carries out granulation and drying in tablets press and the moisture eliminator respectively then.
2, acrylamide according to claim 1 and attapulgite prepare the method for water-holding agent, it is characterized in that: described initiator comprises peroxide initiator and redox initiator.
3, acrylamide according to claim 1 and attapulgite prepare the method for water-holding agent, it is characterized in that: the air pressure mode of movement is all adopted in the conveying of all raw materials and product, and described slaking is to carry out under the vapor pressure of 0.1MPa slaking 4-6 hour.
4, acrylamide according to claim 2 and attapulgite prepare the method for water-holding agent, it is characterized in that described initiator comprises: a kind of or arbitrary combination in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, Potassium Persulphate-ferrous sulfate, ammonium persulfate-sodium bisulfite, the hydrogen peroxide-ferrous sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710015031 CN101085822A (en) | 2007-06-14 | 2007-06-14 | Method for preparing water-loss reducer from acrylamide and attapulgite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710015031 CN101085822A (en) | 2007-06-14 | 2007-06-14 | Method for preparing water-loss reducer from acrylamide and attapulgite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101085822A true CN101085822A (en) | 2007-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710015031 Pending CN101085822A (en) | 2007-06-14 | 2007-06-14 | Method for preparing water-loss reducer from acrylamide and attapulgite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827317A (en) * | 2012-08-31 | 2012-12-19 | 淮阴工学院 | Attapulgite/polyacrylamide composite thickening agent and preparation method |
| CN103304016A (en) * | 2013-06-28 | 2013-09-18 | 常州大学 | Method for preparing hybrid flocculant by use of attapulgite |
-
2007
- 2007-06-14 CN CN 200710015031 patent/CN101085822A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827317A (en) * | 2012-08-31 | 2012-12-19 | 淮阴工学院 | Attapulgite/polyacrylamide composite thickening agent and preparation method |
| CN102827317B (en) * | 2012-08-31 | 2014-04-09 | 淮阴工学院 | Attapulgite/polyacrylamide composite thickening agent and preparation method |
| CN103304016A (en) * | 2013-06-28 | 2013-09-18 | 常州大学 | Method for preparing hybrid flocculant by use of attapulgite |
| CN103304016B (en) * | 2013-06-28 | 2016-04-27 | 常州大学 | A kind of method utilizing attapulgite to prepare hybrid flocculant |
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