CN1485375A - Method for preparation of anti-soil bentonite - Google Patents
Method for preparation of anti-soil bentonite Download PDFInfo
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- CN1485375A CN1485375A CNA021371164A CN02137116A CN1485375A CN 1485375 A CN1485375 A CN 1485375A CN A021371164 A CNA021371164 A CN A021371164A CN 02137116 A CN02137116 A CN 02137116A CN 1485375 A CN1485375 A CN 1485375A
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- bentonite
- soil
- polymeric additive
- sodium bentonite
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Abstract
In the invention, a high-molecular additive is added into normal western bentonite, improving the performance of western bentonite in non-flesh water, then bentonite against pollution is obtained. The mechanism of the bentonite against pollution is that, the high-molecular additive has the great capacity of absorbing and retaining water and withstanding salt, after absorbing water, the high-molecular additive and western bentonite will form a compact membrane configuration, which could withstand pressure, has a very low permeability, which could meet needs against water and penetrationl.
Description
The bentonite waterproof material is used in China and is just begun, there are a considerable amount of engineering projects in non-fresh water environments such as sewage, brackish water, to carry out, sodium bentonite is the main raw material of bentonite waterproof material, and this just needs sodium bentonite should meet the special service requirements of this respect.The present invention be directed to common sodium bentonite is applied in the non-fresh water environments such as sewage, brackish water, hydratability reduces, the characteristics of forfeiture waterproof, seepage control performance, by in common sodium bentonite, adding polymeric additive, improve the performance of sodium bentonite in non-fresh water environment, make anti-soil bentonite.Principle of the present invention is to utilize polymeric additive to have the strong characteristics of water-absorbing-retaining salt resistance ability, the suction back forms fine and close membrane configuration with sodium bentonite, this structure is withstand voltage, rate of permeation is extremely low, can satisfy the needs of waterproof, seepage control engineering in the non-fresh water environment, thereby reach the service requirements of waterproof, seepage control.
The main raw material of polymeric additive is a wilkinite, with sodium bentonite good consistency is arranged, the mixing match of sodium bentonite and polymeric additive is 5: 1,10: 1,20: 1,100: 1 or the like, proportioning can be adjusted according to design requirements, and both are through being mixed and made into anti-soil bentonite.The form of anti-soil bentonite is according to design requirements, can be that powdery, granular, powder mix or other forms.Anti-soil bentonite has good barrier performance in non-fresh water environments such as sewage, brackish water, can be widely used in the underground works, in engineerings such as canal, man-made lake, airport, railway.Anti-soil bentonite can be directly be applied in the underground works with powdery, granular or muddy form, and also forms such as the coiled material that can make with non-woven etc., sheet material, long profiles are used.
Before carrying out underground works, should measure water quality, specific targets comprise the electronic conduction degree (EC), gross contamination (TDS), pH value of water etc., general conductivity should use anti-soil bentonite more than 1000 μ s/cm.The electronic conduction degree of fresh water is less than 300 μ s/cm.
The grown form of anti-soil bentonite has powdery, granular, powder mixing shape; the anti-soil bentonite of general three kinds of forms can be applied in the underground works; muddy is to obtain by the reprocessing to the powdery anti-soil bentonite, and the anti-soil bentonite of making coiled material, sheet material, long profiles is generally with granular, powder mixing shape.The technological process of production of anti-soil bentonite mainly is, natural sodium bentonite in powder (grain) preparation, the preparation of polymeric additive, the proportioning of natural sodium bentonite and polymeric additive is mixed (as Figure of description), below three main technique flow processs is illustrated respectively.
Natural sodium bentonite in powder (grain) preparation, with natural sodium bentonite on request granularity make powdery or granular, powdery is generally at 200 orders-300 order, between the granular particle size 0.5-2mm.
1 part of natural sodium bentonite in powder of 200 orders (weight part) are got in the preparation of polymeric additive, add distilled water in 1: 1 ratio, fully stir into pulpous state.Add 2 parts of 40% acrylamide solutions (weight part), after fully mixing, 0.01 part of adding 3%NN-methyl bisacrylamide, 0.01 part of ammonium persulfate, sodium hydroxide are made oxygenant for 0.1 part, Sulfothiorine is made reductive agent for 0.03 part, after fully mixing, carried out polyreaction 20 minutes under 20 ℃ of room temperatures, reheat is to 45-60 ℃ of reaction, until obtaining gelatinous high molecular polymer.Powdery or granular is made in the high molecular polymer drying that makes, pulverizing, makes polymeric additive.
The proportioning of natural sodium bentonite and polymeric additive is mixed, according to design requirements, natural sodium bentonite in powder for preparing and polymeric additive thorough mixing, proportioning is 5: 1,10: 1,20: 1,100.1 or the like, proportioning can be adjusted according to design requirements, makes anti-soil bentonite.
Claims (5)
- The preparation method of 1 one kinds of anti-soil bentonites is characterized in that said anti-soil bentonite carries out thorough mixing with polymeric additive powder (or particle) in the ratio of design by sodium bentonite in powder (or particle) and obtains.The proportioning of sodium bentonite and polymeric additive is 5: 1,10: 1,20: 1,100: 1 or the like, and its proportioning can be adjusted according to design requirements.The form of mixture is according to design requirements, can be that powdery, granular, powder mix or other forms.
- The preparation method of 2 a kind of anti-soil bentonites as claimed in claim 1 is characterized in that said sodium bentonite can be natural sodium bentonite, also can be the sodium bentonite that obtains through technologies such as artificial modification, purifications.
- The preparation method of 3 a kind of anti-soil bentonites as claimed in claim 1, the main raw material that it is characterized in that said polymeric additive is a wilkinite, itself and sodium bentonite have good consistency.Polymeric additive is that through the effect of redox initiation system, polymerization reaction take place obtains by wilkinite and vinyl monomer acrylamide.
- The preparation method of 4 a kind of anti-soil bentonites as claimed in claim 1, it is characterized in that the water-absorbing-retaining salt resistance ability that having of said polymeric additive is very high, in the use properties excellence of non-fresh water environment, improved the performance of sodium bentonite in non-fresh water environment.
- The preparation method of 5 a kind of anti-soil bentonites as claimed in claim 1, the polymerization process that it is characterized in that polymeric additive is, 200 order bentonite in powder adding distil waters are made pulpous state, add acrylamide solution, after fully mixing, add reductive agents such as oxygenant such as NN-methyl bisacrylamide, ammonium persulfate, sodium hydroxide and Sulfothiorine, after fully mixing, under 20 ℃ of room temperatures, carried out polyreaction 20 minutes, reheat continues to react to 45-60 ℃, until obtaining gelatinous high molecular polymer.Powdery or granular is made in the high molecular polymer drying that makes, pulverizing, makes polymeric additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021371164A CN1485375A (en) | 2002-09-24 | 2002-09-24 | Method for preparation of anti-soil bentonite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA021371164A CN1485375A (en) | 2002-09-24 | 2002-09-24 | Method for preparation of anti-soil bentonite |
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| Publication Number | Publication Date |
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| CN1485375A true CN1485375A (en) | 2004-03-31 |
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| CNA021371164A Pending CN1485375A (en) | 2002-09-24 | 2002-09-24 | Method for preparation of anti-soil bentonite |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514559B (en) * | 2009-03-20 | 2010-05-12 | 捷高科技（苏州）有限公司 | Bentonite waterproof carpet and manufacturing method thereof |
| CN102584056A (en) * | 2012-01-09 | 2012-07-18 | 沈阳化工大学 | Preparation method for bentonite anti-seepage material |
| CN103496870A (en) * | 2013-09-18 | 2014-01-08 | 尹无忌 | Bentonite modifier and application thereof |
| WO2015032131A1 (en) * | 2013-09-06 | 2015-03-12 | Yin Wuji | Bentonite modifier, and modified bentonite and application thereof |
| CN112495355A (en) * | 2020-11-19 | 2021-03-16 | 江苏博联新材料科技有限公司 | Preparation process of sodium-containing bentonite additive |
-
2002
- 2002-09-24 CN CNA021371164A patent/CN1485375A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514559B (en) * | 2009-03-20 | 2010-05-12 | 捷高科技（苏州）有限公司 | Bentonite waterproof carpet and manufacturing method thereof |
| CN102584056A (en) * | 2012-01-09 | 2012-07-18 | 沈阳化工大学 | Preparation method for bentonite anti-seepage material |
| WO2015032131A1 (en) * | 2013-09-06 | 2015-03-12 | Yin Wuji | Bentonite modifier, and modified bentonite and application thereof |
| US9944557B2 (en) | 2013-09-06 | 2018-04-17 | Wuji Yin | Bentonite modifier, modified bentonite, and use thereof |
| CN103496870A (en) * | 2013-09-18 | 2014-01-08 | 尹无忌 | Bentonite modifier and application thereof |
| CN112495355A (en) * | 2020-11-19 | 2021-03-16 | 江苏博联新材料科技有限公司 | Preparation process of sodium-containing bentonite additive |
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