CN112357929A - Environment-friendly bentonite additive and preparation method thereof - Google Patents
Environment-friendly bentonite additive and preparation method thereof Download PDFInfo
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- CN112357929A CN112357929A CN202011319265.XA CN202011319265A CN112357929A CN 112357929 A CN112357929 A CN 112357929A CN 202011319265 A CN202011319265 A CN 202011319265A CN 112357929 A CN112357929 A CN 112357929A
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- sodium
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- bentonite
- environment
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- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 39
- 239000000440 bentonite Substances 0.000 title claims abstract description 39
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000000654 additive Substances 0.000 title claims abstract description 24
- 230000000996 additive effect Effects 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 39
- 239000000741 silica gel Substances 0.000 claims abstract description 29
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 21
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 21
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 21
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims abstract description 21
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 20
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 16
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 16
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 16
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012467 final product Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000003673 groundwater Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229940092782 bentonite Drugs 0.000 abstract description 31
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 abstract description 21
- 229910000280 sodium bentonite Inorganic materials 0.000 abstract description 21
- 229940080314 sodium bentonite Drugs 0.000 abstract description 21
- 239000011734 sodium Substances 0.000 abstract description 16
- 229910052708 sodium Inorganic materials 0.000 abstract description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract description 13
- 229910000281 calcium bentonite Inorganic materials 0.000 abstract description 11
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000084 colloidal system Substances 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- -1 sodium salt modified silica gel Chemical class 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 239000007832 Na2SO4 Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
Abstract
The invention discloses an environment-friendly bentonite additive and a preparation method thereof, wherein the environment-friendly bentonite additive comprises the following components of 1-3 parts by weight of sodium carbonate, 5-10 parts by weight of sodium gluconate, 7-15 parts by weight of sodium stearate, 1-2 parts by weight of diatomite, 7-10 parts by weight of sodium carboxymethylcellulose, 90-100 parts by weight of silica gel and 5-6 parts by weight of polyacrylamide. According to the invention, the sodium treatment effect of the calcium bentonite can be greatly improved through the synergistic effect of the components, and the sodium bentonite with excellent blue absorption, water absorption and colloid value is prepared.
Description
Technical Field
The invention relates to the field of bentonite additives, and particularly relates to an environment-friendly bentonite additive and a preparation method thereof.
Background
Bentonite is also called bentonite, bentonite or bentonite, is a clay rock, also called montmorillonite, has strong hygroscopicity, can be dispersed in an aqueous medium to form a colloidal suspension, and has certain viscosity, thixotropy and lubricity. Therefore, the material is widely applied to industries such as chemical industry, petroleum, food, traffic, medicine, paper making, energy, military industry, environmental protection and the like, and is called as a universal material.
Some cations such as Cu, Mg, Na, K and the like exist in a layered structure formed by the montmorillonite unit cell, but the cations have weak effect on the montmorillonite unit cell and are easy to exchange with other cations. Bentonite produced in natureMost of the bentonite is calcium bentonite, and the performance of the calcium bentonite is poorer than that of sodium bentonite, so that in order to meet the requirements of certain industries on the performance of the bentonite and improve the service efficiency of the bentonite, the bentonite needs to be modified, and the calcium bentonite is modified into the sodium bentonite. At present, the calcium bentonite is modified into the sodium bentonite mainly by adopting an artificial sodium treatment process. The sodium modifier may be Na2CO3NaF and Na2SO4And the like. In the sodium treatment process, a large amount of inorganic strong alkaline reagents are used, so that the defect that a large amount of alkaline wastewater is generated in the sodium treatment reaction is caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an environment-friendly bentonite additive and a preparation method thereof, so as to solve the problem of insufficient environmental protection in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an environment-friendly bentonite additive comprises the following components, by weight, 1-3 parts of sodium carbonate, 5-10 parts of sodium gluconate, 7-15 parts of sodium stearate, 1-2 parts of diatomite, 7-10 parts of sodium carboxymethylcellulose, 90-100 parts of silica gel and 5-6 parts of polyacrylamide.
Further, the weight average molecular weight of the polyacrylamide is 600-800 ten thousand.
The preparation method of the environment-friendly bentonite additive comprises the following steps:
(1) dissolving sodium carbonate, sodium gluconate and sodium stearate in water, heating, adding silica gel, soaking overnight, filtering and retaining the silica gel;
(2) mixing the filtered silica gel with diatomite, sodium carboxymethylcellulose and polyacrylamide, and adding water for grinding;
(3) boiling the ground water solution until the water solution is dry, and putting the solid into a drying oven for drying;
(4) and (4) sieving the dried powder to ensure that the granularity of the sieved solid powder is consistent with that of the bentonite to be mixed, thereby obtaining the final product.
Further, the heating temperature in the step (1) is 70-80 ℃.
Further, the total concentration of the sodium carbonate, the sodium gluconate and the sodium stearate dissolved in the water in the step (1) is 25-30%.
Further, the drying condition of the step (3) is to dry the solid until the moisture is below 5%; the drying temperature is 65-70 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention takes environment-friendly and nontoxic sodium gluconate and sodium stearate as main sodium agents, sodium modification is carried out on bentonite through the matching of the sodium gluconate, the sodium stearate and inorganic weak base sodium carbonate, and Na can be promoted through the combination of silica gel, diatomite and sodium carboxymethylcellulose+/Ca+Adsorption on the surface of silica gel and diatomite to further increase Na+/Ca+Exchange function of (1). Finally, the sodium treatment effect of the calcium bentonite can be greatly improved through the synergistic effect of the components, and the sodium bentonite with excellent blue absorption, water absorption and colloid value is prepared.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention, and all techniques and materials that can be made based on the above teachings of the invention are within the scope of the invention.
An environment-friendly bentonite additive mainly comprises the following components of 1-3 parts by weight of sodium carbonate, 5-10 parts by weight of sodium gluconate, 7-15 parts by weight of sodium stearate, 1-2 parts by weight of diatomite, 7-10 parts by weight of sodium carboxymethylcellulose, 90-100 parts by weight of silica gel and 5-6 parts by weight of polyacrylamide. Wherein the weight average molecular weight of the polyacrylamide is 600-800 ten thousand.
The invention takes environment-friendly and nontoxic sodium gluconate and sodium stearate as main sodium agents, sodium modification is carried out on bentonite through the matching of the sodium gluconate, the sodium stearate and inorganic weak base sodium carbonate, and silica gel, diatomite and sodium carboxymethylcellulose are adoptedCan promote Na+/Ca+Adsorption on the surface of silica gel and diatomite to further increase Na+/Ca+Exchange function of (1). Finally, the sodium treatment effect of the calcium bentonite can be greatly improved through the synergistic effect of the components, and the sodium bentonite with excellent blue absorption, water absorption and colloid value is prepared.
Meanwhile, the invention also provides a preparation method of the environment-friendly bentonite additive, which comprises the following steps:
(1) dissolving sodium carbonate, sodium gluconate and sodium stearate in water, heating to 70-80 deg.C, adding silica gel, soaking overnight, filtering and retaining silica gel; the total concentration of sodium carbonate, sodium gluconate and sodium stearate after dissolving in water is 25-30%.
(2) Mixing the filtered silica gel with diatomite, sodium carboxymethylcellulose and polyacrylamide, and then adding water for grinding;
(3) boiling the ground water solution to dryness, and drying the solid in a drying oven at 65-70 deg.C until the water content is below 5%.
(4) And (4) sieving the dried powder to ensure that the granularity of the sieved solid powder is consistent with that of the bentonite to be mixed, thereby obtaining the final product.
Example 1
(1) Soaking silica gel in a mixed aqueous solution of sodium carbonate, sodium gluconate and sodium stearate (wherein the total concentration of sodium salt is 25%) at 70 ℃, soaking the silica gel overnight, and filtering and retaining the silica gel to obtain sodium salt modified silica gel;
(2) mixing the sodium salt modified silica gel with diatomite, sodium carboxymethylcellulose and polyacrylamide, and then adding water for grinding;
(3) boiling the ground water solution to dryness, putting the solid into a drying oven, and drying until the water content is below 5%, wherein the drying temperature is 70 ℃.
(4) And (3) sieving the dried powder to ensure that the granularity of the sieved solid powder is consistent with that of the bentonite needing to be mixed, thereby obtaining the final product C1. Wherein the weight ratio of sodium carbonate, sodium gluconate, sodium stearate, diatomite, sodium carboxymethylcellulose, silica gel and polyacrylamide is 1: 8: 12: 1: 8: 95: 5.
example 2
(1) Soaking silica gel in a mixed aqueous solution of sodium carbonate, sodium gluconate and sodium stearate (wherein the total concentration of sodium salt is 27%) at 80 ℃, soaking the silica gel overnight, and filtering and retaining the silica gel to obtain sodium salt modified silica gel;
(2) mixing the sodium salt modified silica gel with diatomite, sodium carboxymethylcellulose and polyacrylamide, and then adding water for grinding;
(3) boiling the ground water solution to dryness, putting the solid into a drying oven, and drying until the water content is below 5%, wherein the drying temperature is 65 ℃.
(4) And (3) sieving the dried powder to ensure that the granularity of the sieved solid powder is consistent with that of the bentonite needing to be mixed, thereby obtaining the final product C2. Wherein the weight ratio of sodium carbonate, sodium gluconate, sodium stearate, diatomite, sodium carboxymethylcellulose, silica gel and polyacrylamide is 2: 5: 7: 1: 10: 90: 6.
example 3
(1) Soaking silica gel in a mixed aqueous solution of sodium carbonate, sodium gluconate and sodium stearate (wherein the total concentration of sodium salt is 30%) at 75 ℃, soaking the silica gel overnight, and filtering and retaining the silica gel to obtain sodium salt modified silica gel;
(2) mixing the sodium salt modified silica gel with diatomite, sodium carboxymethylcellulose and polyacrylamide, and then adding water for grinding;
(3) boiling the ground water solution to dryness, putting the solid into a drying oven, and drying until the water content is below 5%, wherein the drying temperature is 65 ℃.
(4) And (3) sieving the dried powder to ensure that the granularity of the sieved solid powder is consistent with that of the bentonite needing to be mixed, thereby obtaining the final product C3. Wherein the weight ratio of sodium carbonate, sodium gluconate, sodium stearate, diatomite, sodium carboxymethylcellulose, silica gel and polyacrylamide is 3: 10: 15: 2: 7: 100: 6.
comparative example 1
Bentonite additive D1 was prepared according to the method of example 1, except that sodium gluconate was not used.
Comparative example 2
Bentonite additive D2 was prepared by the method of example 1, except that sodium stearate was not used.
Comparative example 3
Bentonite additive D3 was prepared according to the method of example 1, except that sodium carboxymethylcellulose was not used.
Comparative example 4
Bentonite additive D4 was prepared according to the method of example 1, except that sodium carbonate was not used.
Mixing calcium bentonite and Na at room temperature2SO4Mixing and carrying out sodium-based treatment for 24 hours to prepare primary sodium-based bentonite; wherein the calcium bentonite and Na2SO4The weight ratio of (A) to (B) is 100: 5. then, paving the primary sodium bentonite, equally dividing into 7 parts, and respectively spraying the sodium bentonite additives prepared in examples 1-3 and comparative examples 1-4 for inoculation to prepare secondary sodium bentonite; wherein the weight ratio of the first-grade sodium bentonite to the sodium bentonite additive is 100: 20.
the blue absorption, moisture and water absorption of the secondary sodium bentonite were measured according to the methods described in the national standard, and the specific results are shown in table 1.
| Amount of blue absorbed (g/100 g) | Water absorption (%) | Glue price (ml/15 g) | Moisture (%) | |
| Secondary sodium bentonite (C1) | 40 | 423 | 73 | 8 |
| Secondary sodium bentonite (C2) | 43 | 425 | 71 | 10 |
| Secondary sodium bentonite (C3) | 42 | 421 | 72 | 12 |
| Secondary sodium bentonite (D1) | 37 | 366 | 56 | 18 |
| Secondary sodium bentonite (D2) | 36 | 356 | 54 | 17 |
| Secondary sodium bentonite (D3) | 36 | 347 | 56 | 18 |
| Secondary sodium bentonite (D4) | 35 | 354 | 52 | 16 |
| First-grade sodium bentonite | 19 | 325 | 46 | 20 |
| Calcium bentonite | 17 | 306 | 41 | 22 |
As can be seen from the above table, the sodium bentonite additive provided by the present invention can sufficiently sodium-modify calcium bentonite.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The environment-friendly bentonite additive is characterized by comprising the following components of 1-3 parts by weight of sodium carbonate, 5-10 parts by weight of sodium gluconate, 7-15 parts by weight of sodium stearate, 1-2 parts by weight of diatomite, 7-10 parts by weight of sodium carboxymethylcellulose, 90-100 parts by weight of silica gel and 5-6 parts by weight of polyacrylamide.
2. The environment-friendly bentonite additive as claimed in claim 1, wherein the polyacrylamide has a weight average molecular weight of 600-800 ten thousand.
3. The preparation method of the environment-friendly bentonite additive is characterized by comprising the following steps:
(1) dissolving sodium carbonate, sodium gluconate and sodium stearate in water, heating, adding silica gel, soaking overnight, filtering and retaining the silica gel;
(2) mixing the filtered silica gel with diatomite, sodium carboxymethylcellulose and polyacrylamide, and adding water for grinding;
(3) boiling the ground water solution until the water solution is dry, and putting the solid into a drying oven for drying;
(4) and (4) sieving the dried powder to ensure that the granularity of the sieved solid powder is consistent with that of the bentonite to be mixed, thereby obtaining the final product.
4. The method for preparing the environment-friendly bentonite additive as claimed in claim 3, wherein the heating temperature in the step (1) is 70-80 ℃.
5. The method for preparing environment-friendly bentonite additive according to claim 3, wherein the total concentration of the sodium carbonate, the sodium gluconate and the sodium stearate dissolved in the water in the step (1) is 25-30%.
6. The method for preparing environment-friendly bentonite additive according to claim 3, wherein the drying conditions in the step (3) are drying the solid until the moisture content is below 5%; the drying temperature is 65-70 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319265.XA CN112357929A (en) | 2020-11-23 | 2020-11-23 | Environment-friendly bentonite additive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319265.XA CN112357929A (en) | 2020-11-23 | 2020-11-23 | Environment-friendly bentonite additive and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112357929A true CN112357929A (en) | 2021-02-12 |
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| CN202011319265.XA Pending CN112357929A (en) | 2020-11-23 | 2020-11-23 | Environment-friendly bentonite additive and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817536A (en) * | 2010-05-14 | 2010-09-01 | 淄博联技化工有限公司 | Novel process for producing organically modified bentonite |
| CN103725265A (en) * | 2012-10-10 | 2014-04-16 | 曾理 | Compound viscosity reducer and viscosity reducing process applicable to bentonite solution |
| CN104986778A (en) * | 2015-06-19 | 2015-10-21 | 芜湖恒杰膨润土科技有限公司 | Sodium bentonite and double sodium modifying method for sodium bentonite |
| CN105036149A (en) * | 2015-06-19 | 2015-11-11 | 芜湖恒杰膨润土科技有限公司 | Sodium bentonite additive and preparation method thereof |
| CN105712363A (en) * | 2014-12-01 | 2016-06-29 | 淄博龙沙高分子材料科技有限公司 | Organically modified bentonite production process |
-
2020
- 2020-11-23 CN CN202011319265.XA patent/CN112357929A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817536A (en) * | 2010-05-14 | 2010-09-01 | 淄博联技化工有限公司 | Novel process for producing organically modified bentonite |
| CN103725265A (en) * | 2012-10-10 | 2014-04-16 | 曾理 | Compound viscosity reducer and viscosity reducing process applicable to bentonite solution |
| CN105712363A (en) * | 2014-12-01 | 2016-06-29 | 淄博龙沙高分子材料科技有限公司 | Organically modified bentonite production process |
| CN104986778A (en) * | 2015-06-19 | 2015-10-21 | 芜湖恒杰膨润土科技有限公司 | Sodium bentonite and double sodium modifying method for sodium bentonite |
| CN105036149A (en) * | 2015-06-19 | 2015-11-11 | 芜湖恒杰膨润土科技有限公司 | Sodium bentonite additive and preparation method thereof |
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Application publication date: 20210212 |