CN101973741B - Green attapulgite polymer clay powder - Google Patents
Green attapulgite polymer clay powder Download PDFInfo
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- CN101973741B CN101973741B CN2010102404355A CN201010240435A CN101973741B CN 101973741 B CN101973741 B CN 101973741B CN 2010102404355 A CN2010102404355 A CN 2010102404355A CN 201010240435 A CN201010240435 A CN 201010240435A CN 101973741 B CN101973741 B CN 101973741B
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- attapulgite
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- polymer clay
- soft pottery
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- 229960000892 attapulgite Drugs 0.000 title claims abstract description 55
- 229910052625 palygorskite Inorganic materials 0.000 title claims abstract description 55
- 239000000843 powder Substances 0.000 title claims abstract description 43
- 239000004927 clay Substances 0.000 title claims abstract description 23
- 229920000642 polymer Polymers 0.000 title abstract 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000010298 pulverizing process Methods 0.000 claims abstract description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 7
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000004113 Sepiolite Substances 0.000 claims abstract description 6
- 239000001110 calcium chloride Substances 0.000 claims abstract description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 6
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 6
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 6
- 239000004575 stone Substances 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- CODAYFPFZXWNLD-UHFFFAOYSA-N 2-hydroxypropanoyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC(=O)C(C)O CODAYFPFZXWNLD-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000000975 dye Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000000049 pigment Substances 0.000 claims description 5
- 235000011194 food seasoning agent Nutrition 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000003301 hydrolyzing effect Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 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 abstract 1
- 238000007605 air drying Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000440 bentonite Substances 0.000 abstract 1
- 229910000278 bentonite Inorganic materials 0.000 abstract 1
- 239000001768 carboxy methyl cellulose Substances 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 239000012860 organic pigment Substances 0.000 abstract 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 abstract 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 abstract 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 abstract 1
- 235000010956 sodium stearoyl-2-lactylate Nutrition 0.000 abstract 1
- KNYAZNABVSEZDS-UHFFFAOYSA-M sodium;2-octadecanoyloxypropanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC(=O)OC(C)C([O-])=O KNYAZNABVSEZDS-UHFFFAOYSA-M 0.000 abstract 1
- 239000004408 titanium dioxide Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 15
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000002932 luster Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009967 tasteless effect Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 231100000652 hormesis Toxicity 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011022 opal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000019633 pungent taste Nutrition 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention discloses a green attapulgite polymer clay powder, which is prepared by using purified attapulgite clay, white bentonite, sepiolite, ferric oxide green, organic pigment green, calcium chloride, titanium dioxide anatase, sodium polyacrylate, sodium carboxymethylcellulose and sodium stearoyl lactate as raw materials through the steps of mixing the raw materials above; conveying the obtained mixture into a crusher to crush; then conveying the crushed mixture into a pulverizing mill to pulverize; and packaging the obtained product so as to obtain the finished product of the green attapulgite polymer clay powder. Green attapulgite polymer clay mud prepared by adding water and methyl silicone oil into the green attapulgite polymer clay powder has the advantages of high viscosity, good soft plasticity, low shrinkage rate, no baking in the process of hardening after air drying, no cracking, no corrosivity, and no greasy feeling. The invention is simple in production process, low in cost, easy to use, and beneficial for popularization; and the green attapulgite polymer clay powder is suitable for the field preparation of green attapulgite polymer clay mud.
Description
Technical field
The present invention relates to the mud of making pottery, be specifically related to the soft pottery powder of a kind of green Attapulgite.
Background technology
The soft ceramic mud of supplying on the market is through the block soft ceramic mud after the batching processing, the main raw material of soft ceramic mud is polyvinyl chloride and lime carbonate, binding property is bad under the normal temperature state, and prolonged preservation easily wears out and fades, and bubbles easily during the baking soft ceramic mud, when if temperature surpasses 200 ℃, finished product is burnt and melt, even may cause burning, generate chloride pungency toxic smog, the selling price of soft ceramic mud is higher, is unfavorable for promoting the use of.
The Chinese patent publication number is: CN 101186736, open day: on May 28th, 2008, name is called " a kind of soft ceramic mud and preparation method thereof ", disclose: " a kind of soft ceramic mud and preparation method; it is prepared from by following parts by weight of component: polyvinyl chloride (PVC) paste resin 15～40, bizinc resin 20～55, lime carbonate 15～35, softening agent 0.1～0.4, toner 0.5～0.15, all the other are micro-moisture and impurity ".
The weak point of above-mentioned patent is that the soft ceramic mud main raw material that this technology is produced is polyvinyl chloride (PVC) paste resin, bizinc resin and lime carbonate, and binding property is bad under the normal temperature state, is unfavorable for making moulding, and bizinc resin belongs to dangerous product.
The Chinese patent Granted publication number is: CN 1273531, Granted publication day: on September 6th, 2006, name is called " a kind of manufacture method of transparent texture resin clay ", disclose: " a kind of manufacture method of transparent texture resin clay; it is characterized in that: it is at first mixed together by ethylene powder-vinyl acetate copolymer, starch, glycerol, sanitas, spices and adds water purification again and stir into mud shape thing; and then add whiteruss and mix and stir, vacuum-packed finished product ".
The weak point of above-mentioned patent is that the transparent texture resin clay main raw material that this technology is produced is ethylene powder-vinyl acetate copolymer and starch, ethylene powder-vinyl acetate copolymer has hormesis to eyes and skin, be not suitable for being used to manufacture the raw material of handicraft, need a large amount of starch in this product, be unfavorable for promoting the use of.
Summary of the invention
The objective of the invention is to overcome weak point in the prior art, provide a kind of green Attapulgite soft pottery powder.
The soft pottery powder of green Attapulgite is green by Concavo-convex stick after purifying stone clay, white wilkinite, sepiolite, iron oxide green, pigment dyestuff, calcium chloride, anatase thpe white powder, sodium polyacrylate, Xylo-Mucine and stearoyl lactate are formed.After the batch mixes with the soft pottery powder of green Attapulgite, pulverize in the input pulverizer, carry out abrasive dust in the mixture input pulverizing mill after will pulverizing again, be packaged as the finished product of the soft pottery powder of green Attapulgite.
Use the wet beneficiation craft of Attapulgite, the screening of mineral such as the hydromica in the attapulgite clay, quartz, opal and carbonate is got rid of, obtain a kind of Concavo-convex stick after purifying stone clay, Concavo-convex stick after purifying stone clay soil property exquisiteness, smooth surface, quality is lighter, be viscosity and plasticity-when moist, its viscosity can reach more than the 3000mPas, helps the bonding between the raw material, the dry post-shrinkage ratio of attapulgite clay is little, and does not produce be full of cracks.
The white wilkinite is the wilkinite of a kind of high whiteness and high brightness, has excellent plasticity, cohesiveness and oilness.
Sepiolite is a kind of rich fibrous magnesium silicate clay mineral, has fine and smooth soft, viscosity is strong, shrinking percentage is low and plasticity-the is good characteristics of satin luster, light weight, helps improving the gloss and the mouldability of the soft pottery powder of green Attapulgite.
Iron oxide green is a kind of green powder of lovely luster, has characteristics such as tinting strength, opacifying power, weathering resistance are all very high.
Pigment dyestuff is green to be a kind of green powder, has lovely luster, strong coloring force, sun-proof excellent property, acidproof, alkaline-resisting and do not have characteristics of transport property.
Calcium chloride is water-soluble, is a kind of siccative commonly used, has in the present invention to improve the soft pottery powder of green Attapulgite and add hardness after water is made into green Attapulgite soft ceramic mud, and can increase the anti-ability of freezing of green Attapulgite soft ceramic mud.
Anatase thpe white powder has excellent water dispersible and remarkable optical property, form and aspect stability, and size-grade distribution is good, has the characteristics of high gloss, high reducing power, high covering power.
Sodium polyacrylate is a kind of white powder, odorless, tasteless and nontoxic can be slowly soluble in water, forms utmost point heavy-gravity transparent gel, have thickening, emulsification, figuration, multiple function such as expanded, stable, can improve the cohesiveness and the ductility of the soft pottery powder of green Attapulgite.
Xylo-Mucine is white fiber shape or particle powder, and odorless is tasteless, and water absorbability is arranged, and easily is scattered in to be swelled into colloidal solution in the water, has good emulsifying stablizer and thickening material.
Stearoyl lactate is a kind of off-white powder or chip solid, can be scattered in the hot water, has effects such as emulsification, anti-aging and increase plasticity in the present invention.
Selecting sodium polyacrylate, stearoyl lactate and Xylo-Mucine in the present invention simultaneously for use, is to add water and make cohesiveness, flexibility, the ductility behind the green Attapulgite soft ceramic mud and prevent that green Attapulgite soft ceramic mud is aging in order further to increase the soft pottery powder of green Attapulgite.
The present invention is achieved by following technical proposals:
1, the batching of the soft pottery powder of green Attapulgite is made up of following component by weight percentage: Concavo-convex stick after purifying stone clay 30～55%, white wilkinite 15～30%, sepiolite 5～20%, iron oxide green 1～5%, pigment dyestuff are green 1～5%, calcium chloride 1～5%, anatase thpe white powder 0.1～5%, sodium polyacrylate 0.1～5%, Xylo-Mucine 0.1～5% and stearoyl lactate 0.1～5%.
2, the production method of the soft pottery powder of green Attapulgite: after the batch mixes with the soft pottery powder of green Attapulgite, pulverize in the input pulverizer, compound particles fineness after the pulverizing is less than 0.250 millimeter, carry out abrasive dust in the mixture input pulverizing mill after will pulverizing again, compound particles fineness behind the abrasive dust is packaged as the finished product of the soft pottery powder of green Attapulgite less than 0.045 millimeter.
Described Concavo-convex stick after purifying stone clay, it is the Attapulgite ore deposit mixture that will contain earth impurity, import in the hydrolytic tank after crushed, soak after 24 hours, dash with high-pressure pump and to turn over, and the sieve of the drum by making with stainless steel steel wire sieve removes the impurity more than 1 millimeter, send in the acclive settling tank, continuation is dashed with high-pressure pump and is turned over, after 12 hours, because the proportion in Attapulgite ore deposit is lighter, its the superiors in whole throw out draws this part Attapulgite ore deposit with slush pump and sends in the flat settling tank, emits unnecessary water after 15 hours, through 2-3 days seasoning, take out this part Attapulgite ore deposit and be Concavo-convex stick after purifying stone clay;
This technology is to adopt " the Attapulgite wet beneficiation craft " in application on September 18th, 2003 by the inventor, and the Chinese patent Granted publication number is: CN1224463, Granted publication day: on October 26th, 2005.
The using method of the soft pottery powder of green Attapulgite: 1. the soft pottery powder of green Attapulgite is placed in the container, slowly in the soft pottery powder of green Attapulgite, added 50～60 ℃ hot water, and in time mix and crumple green into strips clod thoroughly, left standstill subsequently 30～60 minutes; 2. methyl-silicone oil is spread upon the green clod outside surface of strip and crumple once more, be pressed into the green Attapulgite soft ceramic mud of softish, promptly can be used for moulding clear patterns, lovely luster, the artwork that effect is true to nature.
The separate case application of above-mentioned using method patent of invention, number of patent application is 201010240164.3.
Use the soft pottery powder of green Attapulgite to add the green Attapulgite soft ceramic mud viscosity height of water and methyl-silicone oil making, soft plasticity-is good, have that shrinking percentage is little, indeformable, hardening after seasoning, do not need to toast, do not produce be full of cracks, not mouldy, never degenerate, not skin irritation, nontoxic, non-corrosiveness and do not have the characteristics of greasy feeling.
Production technique of the present invention is simple, and is with low cost, easy to use, helps promoting the use of.
The soft pottery powder of green Attapulgite is applicable to the Attapulgite soft ceramic mud of field fabrication green.
Embodiment
The invention will be further described below in conjunction with embodiment:
1, the batching of the soft pottery powder of green Attapulgite is made up of following component by weight percentage: Concavo-convex stick after purifying stone clay 44%, white wilkinite 25%, sepiolite 18%, iron oxide green 3%, pigment dyestuff are green 2%, calcium chloride 2%, anatase thpe white powder 2%, sodium polyacrylate 2%, Xylo-Mucine 1.5% and stearoyl lactate 0.5%.
2, the production method of the soft pottery powder of green Attapulgite: after the batch mixes with the soft pottery powder of green Attapulgite, pulverize in the input pulverizer, compound particles fineness after the pulverizing is less than 0.250 millimeter, carry out abrasive dust in the mixture input pulverizing mill after will pulverizing again, compound particles fineness behind the abrasive dust is packaged as the finished product of the soft pottery powder of green Attapulgite less than 0.045 millimeter.
Claims (1)
1. soft pottery powder of green Attapulgite, it is characterized in that the batching of the soft pottery powder of green Attapulgite is made up of following component by weight percentage: Concavo-convex stick after purifying stone clay 30～55%, white wilkinite 15～30%, sepiolite 5～20%, iron oxide green 1～5%, pigment dyestuff are green 1～5%, calcium chloride 1～5%, anatase thpe white powder 0.1～5%, sodium polyacrylate 0.1～5%, Xylo-Mucine 0.1～5% and stearoyl lactate 0.1～5%;
The production method of the soft pottery powder of described green Attapulgite: after the batch mixes with the soft pottery powder of green Attapulgite, pulverize in the input pulverizer, compound particles fineness after the pulverizing is less than 0.250 millimeter, carry out abrasive dust in the mixture input pulverizing mill after will pulverizing again, compound particles fineness behind the abrasive dust is packaged as the finished product of the soft pottery powder of green Attapulgite less than 0.045 millimeter;
Described Concavo-convex stick after purifying stone clay, it is the Attapulgite ore deposit mixture that will contain earth impurity, import in the hydrolytic tank after crushed, soak after 24 hours, dash with high-pressure pump and to turn over, and the sieve of the drum by making with stainless steel steel wire sieve removes the impurity more than 1 millimeter, send in the acclive settling tank, continuation is dashed with high-pressure pump and is turned over, after 12 hours, because the proportion in Attapulgite ore deposit is lighter, its the superiors in whole throw out draws this part Attapulgite ore deposit with slush pump and sends in the flat settling tank, emits unnecessary water after 15 hours, through 2-3 days seasoning, take out this part Attapulgite ore deposit and be Concavo-convex stick after purifying stone clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102404355A CN101973741B (en) | 2010-07-30 | 2010-07-30 | Green attapulgite polymer clay powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102404355A CN101973741B (en) | 2010-07-30 | 2010-07-30 | Green attapulgite polymer clay powder |
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| Publication Number | Publication Date |
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| CN101973741A CN101973741A (en) | 2011-02-16 |
| CN101973741B true CN101973741B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102404355A Expired - Fee Related CN101973741B (en) | 2010-07-30 | 2010-07-30 | Green attapulgite polymer clay powder |
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| Country | Link |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5008226A (en) * | 1989-05-16 | 1991-04-16 | Engelhard Corporation | Process for making acid activated bleaching earth using high susceptibility source clay and novel bleaching earth product |
| CN1167478A (en) * | 1995-08-04 | 1997-12-10 | 総合粘土窯业株式会社 | Synthetic clay for ceramics and process for preparing the same |
| US6130179A (en) * | 1998-11-12 | 2000-10-10 | Itc, Inc. | Purified attapulgite clay |
-
2010
- 2010-07-30 CN CN2010102404355A patent/CN101973741B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5008226A (en) * | 1989-05-16 | 1991-04-16 | Engelhard Corporation | Process for making acid activated bleaching earth using high susceptibility source clay and novel bleaching earth product |
| CN1167478A (en) * | 1995-08-04 | 1997-12-10 | 総合粘土窯业株式会社 | Synthetic clay for ceramics and process for preparing the same |
| US6130179A (en) * | 1998-11-12 | 2000-10-10 | Itc, Inc. | Purified attapulgite clay |
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| CN101973741A (en) | 2011-02-16 |
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