CN103896320B - A kind of preparation method of Large stone high-pruity barium carbonate - Google Patents
A kind of preparation method of Large stone high-pruity barium carbonate Download PDFInfo
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- CN103896320B CN103896320B CN201410164161.4A CN201410164161A CN103896320B CN 103896320 B CN103896320 B CN 103896320B CN 201410164161 A CN201410164161 A CN 201410164161A CN 103896320 B CN103896320 B CN 103896320B
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- barium
- barium carbonate
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- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 title claims abstract description 98
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000004575 stone Substances 0.000 title claims abstract description 15
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 claims abstract description 40
- 229910001626 barium chloride Inorganic materials 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 28
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 24
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 24
- 239000012452 mother liquor Substances 0.000 claims abstract description 18
- 229910052788 barium Inorganic materials 0.000 claims abstract description 12
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 65
- 229940045511 barium chloride Drugs 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 20
- 239000013078 crystal Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 239000012295 chemical reaction liquid Substances 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 claims description 6
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 4
- -1 and then filter Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 15
- 239000000047 product Substances 0.000 abstract description 12
- 210000003298 dental enamel Anatomy 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000013066 combination product Substances 0.000 abstract 1
- 229940127555 combination product Drugs 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of Large stone high-pruity barium carbonate preparation method its be specially normal temperature under prepare certain density ammonium bicarbonate soln and barium chloride solution respectively with pure water; In the enamel reaction still that band stirs, add pure water or the chemical combination mother liquor of certain volume, add in reactor under low rate mixing by two kinds of liquid of preparation simultaneously with certain flow, control chemical combination mother liquor pH within the specific limits, chemical combination obtains Large stone high-pruity barium carbonate.After combination reaction terminates, mother liquor is starched with barium and is separated, and barium slurry, through washing, filters, and dries, obtains Large stone high-pruity barium carbonate finished product.Part chemical combination mother liquor is returned in reactor for combination reaction next time.The median size of combination product high-pruity barium carbonate obviously increases, narrow particle size distribution, thus improves the powder fluidity of finished product barium carbonate.This technological reaction carries out at normal temperatures, save energy, and cost is low, and conversion unit is normal temperature and pressure equipment, and equipment is simple, less investment.
Description
Technical field
The present invention relates to the preparation method of barium carbonate, be specifically related to a kind of preparation method of Large stone high-pruity barium carbonate.
Background technology
High-pruity barium carbonate is a kind of powdered material being widely used in manufacture electronic ceramics product, requirement purity is high, and particle diameter is little, also for the manufacture of liquid crystal substrate glass, in recent years along with the continuous increase of liquid crystal display product demand, the requirement of production to high-pruity barium carbonate quality product and physical and chemical performance of liquid crystal substrate glass improves constantly, wherein new requirement is proposed to the mobility of high-pruity barium carbonate, meet continus convergence and the accurate-metering of liquid crystal substrate glass, the preparation of macrobead high-pruity barium carbonate meets one of its approach required, at present, China's high-pruity barium carbonate production technique mainly contains double decomposition and carborization, namely soluble barium salt obtains in high-pruity barium carbonate and barium hydroxide solution with carbonate solution generation replacement(metathesis)reaction and passes into carbon dioxide carbonization and obtain high-pruity barium carbonate.The high-pruity barium carbonate size distribution that ordinary method is produced is wide, span is more than 4.0, median size is between 1 ~ 4 μm, product poor fluidity, batching mixing step in base plate glass production process, often there is the slow even latch up phenomenon of high-pruity barium carbonate carrier pipe blanking, bring very large puzzlement to normal production.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of Large stone high-pruity barium carbonate, can prepare that Large stone, particle size distribution range are little, the high-pruity barium carbonate of split good fluidity.
The present invention adopts following technical scheme:
A preparation method for Large stone high-pruity barium carbonate, it specifically comprises the steps:
(1) solution is configured: at 15 ~ 25 DEG C, prepare ammonium bicarbonate aqueous solution and barium chloride solution;
(2) ready reaction still: add pure water in a kettle.;
(3) drip: the stirring rake starting reactor, two kinds of solution of preparation in step (1) are added drop-wise in reactor simultaneously;
(4) stir: be at the uniform velocity stirred to after dropwising and react completely, obtain barium carbonate sediment;
(5) be separated: the reaction solution of step (4) gained is left standstill, then upper strata mother liquor be separated with barium slurry;
(6) aftertreatment: barium slurry, through washing, filtration, oven dry, to obtain final product;
Wherein, the concentration of the ammonium bicarbonate aqueous solution described in step (1) is 70 ~ 110g/L, and the concentration of described barium chloride solution is 200 ~ 240g/L;
In described step (2), add the high-pruity barium carbonate of 1% ~ 5% of barium carbonate theoretical yield after adding pure water in a kettle. as crystal seed;
In described step (3), control the dropping flow of barium chloride solution, make the time for adding of solution be 0.8 ~ 2.0 hour, the dropping flow of described ammonium bicarbonate soln, according to the dropping Flow-rate adjustment of barium chloride solution, controls the pH value of reaction solution between 5.4 ~ 5.7;
In the dropping process of described step (4), the rotating speed controlling described stirring rake is 40 ~ 110r/min, makes the pH value of reaction kettle for reaction liquid between 5.4 ~ 5.7 by the rate of addition controlling barium chloride solution and ammonium bicarbonate soln; Be that 1:2.2 ~ 1:2.4 passes in reactor by the mol ratio of bariumchloride and bicarbonate of ammonia.
As a further improvement on the present invention, the water yield added in reactor described in step (2) there was not stirring rake bottom to be advisable with liquid level.
As a further improvement on the present invention, the slurry of barium described in step (6) is less than 70ppm with chloride ion content in 20 ~ 95 DEG C of pure water to washing water.
As a further improvement on the present invention, in described step (6), bake out temperature is 110 ~ 240 DEG C.
As a further improvement on the present invention, the pure water added in described step (2) can be replaced by the mother liquor obtained described in step (5).
As a further improvement on the present invention, it specifically comprises the steps:
(1) solution is configured: normal temperature compound concentration is the ammonium bicarbonate aqueous solution of 70 ~ 110g/L, and configuration concentration is the barium chloride solution of 200-240g/L;
(2) ready reaction still: add pure water or mother liquor in a kettle., the water yield added accounts for 1/12 ~ 1/9 of reactor volume;
(3) crystal seed is added: add the high-pruity barium carbonate of 1% ~ 5% of barium carbonate theoretical yield in a kettle. as crystal seed;
(4) drip: the stirring rake starting reactor, control rotating speed of agitator is 40 ~ 110r/min, by step
(1) in, two kinds of solution of preparation are that 1:2.2 ~ 1:2.4 passes in reactor simultaneously by the mol ratio of bariumchloride and bicarbonate of ammonia, control the dropping flow of barium chloride solution, the time for adding of solution is made to be 0.8 ~ 2.0 hour, the dropping flow of described ammonium bicarbonate soln is according to the dropping Flow-rate adjustment of barium chloride solution, in dropping process, make the pH value of reaction kettle for reaction liquid between 5.4 ~ 5.7 by the rate of addition controlling barium chloride solution and ammonium bicarbonate soln.
(5) stir: at the uniform velocity stirring 20 ~ 40min after dropwising, to reacting completely, obtaining barium carbonate sediment;
(6) be separated: the reaction solution of step (4) gained is left standstill, by upper strata liquor abstraction, obtain barium slurry;
(7) aftertreatment: in step (6), gained barium slurry is less than 70ppm with chloride ion content in 20 ~ 95 DEG C of pure water to washing water, and then filter, filter cake is dried under the condition of 110 ~ 240 DEG C, to obtain final product.
Positively effect of the present invention is as follows:
Prepared the barium carbonate of gained by method provided by the present invention, median size obviously increases, and median size, more than 10 μm, can reach 20-30 μm, and particle size distribution span is at about 2.0 μm, and main content can reach more than 99.5%.Reaction process of the present invention is carry out under normal temperature, saves the energy, reduces production cost.Median size increases, and narrow particle size distribution, substantially improves the flowing property of product.Batching mixing step in base plate glass production process, efficiently solves the phenomenon that the blanking of high-pruity barium carbonate carrier pipe even blocks slowly.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the normal temperature described in the application refers to 15 ~ 25 DEG C.
The solution that the present invention is appropriate according to reactor volume size configure, add the pure water of certain volume or the mother liquor of reaction solution in a kettle., stir with slower speed, drip two kinds of barium chloride solutions and ammonium bicarbonate soln simultaneously, control the pH value of time for adding and reaction kettle for reaction liquid, so just can obtain the barium carbonate crystal that purity is higher, particle diameter is larger, products obtained therefrom good fluidity, yield and purity higher, and particle diameter distribution width is less.
Embodiment 1
Under normal temperature, 200kg is refined bariumchloride and be dissolved in 1000L pure water, be stored in bariumchloride storage tank after filtration; 167kg food grade ammonium bicarbonate is dissolved in 1950L pure water, is stored in after filtration in bicarbonate of ammonia storage tank.
In the enamel reaction still of 5000L, add pure water 500L, high-pruity barium carbonate 2kg is as crystal seed.
Start stirring rake, adjustment stirring arm rotating speed is 50r/min, normal temperature starts to drip, two kinds of solution are added in enamel reaction still simultaneously, barium chloride solution initial flow is 15.0L/min, ammonium bicarbonate soln initial flow is 29.2L/min, the pH value of measured reaction liquid in dropping process, pH is made to remain between 5.4 ~ 5.7 by adjusting two kinds of solution floies, in adjustment process, the flow controlling barium chloride solution is 10-20L/min, makes between dropping process used time 0.8-2.0 hour, in the present embodiment, within 0.8 hour, two kinds of solution all dropwise.
After dropwising, at the uniform velocity stir 30min, after completion of the reaction, leave standstill 30min.
Upper strata mother liquor in reaction solution is pumped, barium carbonate sediment deionized water wash to wash water chloride ion content is 70ppm, centrifuging, then by filter cake at 200 DEG C dry 8 hours, finally obtaining median size in particle is 19.97 μm, and particle size distribution span is 1.965 μm, and purity is the barium carbonate product of 99.8%, bulk specific weight 1.30, good fluidity.
Embodiment 2
Under normal temperature, 220kg is refined bariumchloride and be dissolved in 1000L pure water, be stored in bariumchloride storage tank after filtration; 188kg food grade ammonium bicarbonate is dissolved in 2000L pure water, is stored in after filtration in bicarbonate of ammonia storage tank.
In the enamel reaction still of 5000L, add the mother liquor 500L extracted out in embodiment 1, add high-pruity barium carbonate 2kg as crystal seed.
Start stirring rake, adjustment stirring arm rotating speed is 65r/min, normal temperature starts to drip, two kinds of solution are added in enamel reaction still simultaneously, barium chloride solution initial flow is 13.0L/min, ammonium bicarbonate soln initial flow is 26.00L/min, the pH value of measured reaction liquid in dropping process, pH is made to remain between 5.4 ~ 5.7 by adjusting two kinds of solution floies, in adjustment process, the flow controlling barium chloride solution is 10-20L/min, makes between dropping process used time 0.8-2.0 hour, in the present embodiment, within 2.0 hours, two kinds of solution all dropwise.
After dropwising, at the uniform velocity stir 30min, after completion of the reaction, leave standstill 30min.
By reaction solution at the middle and upper levels mother liquor pump, barium carbonate sediment deionized water wash to wash water chloride ion content is 60ppm, centrifuging, then by filter cake at 200 DEG C dry 8 hours, finally obtaining median size in particle is 16.58 μm, and particle size distribution span is 1.908 μm, and purity is the barium carbonate product of 99.8%, bulk specific weight 1.30, good fluidity.
Embodiment 3
Under normal temperature, 200kg is refined bariumchloride and be dissolved in 1000L pure water, be stored in bariumchloride storage tank after filtration; 182kg food grade ammonium bicarbonate is dissolved in 1900L pure water, is stored in after filtration in bicarbonate of ammonia storage tank.
In the enamel reaction still of 5000L, add the mother liquor 500L extracted out in embodiment 2, add high-pruity barium carbonate 2kg as crystal seed.
Start stirring rake, adjustment stirring arm rotating speed is 50r/min, normal temperature starts to drip, two kinds of solution are added in enamel reaction still simultaneously, barium chloride solution initial flow is 15.0L/min, ammonium bicarbonate soln initial flow is 28.5L/min, the pH value of measured reaction liquid in dropping process, pH is made to remain between 5.4 ~ 5.7 by adjusting two kinds of solution floies, in adjustment process, the flow controlling barium chloride solution is 10-20L/min, makes between dropping process used time 0.8-2.0 hour, in the present embodiment, within 1.5 hours, two kinds of solution all dropwise.
After dropwising, at the uniform velocity stir 30min, after completion of the reaction, leave standstill 30min.
Reaction mother liquor is pumped, barium carbonate sediment deionized water wash to wash water chloride ion content is 70ppm, centrifuging, then by filter cake at 200 DEG C dry 8 hours, finally obtaining particle diameter in particle is 13.24 μm, and span is 2.053, and purity is the barium carbonate product of 99.8%, bulk specific weight 1.30, good fluidity.
Embodiment 4
Under normal temperature, 240kg is refined bariumchloride and be dissolved in 1000L pure water, be stored in bariumchloride storage tank after filtration; 210kg food grade ammonium bicarbonate is dissolved in 1900L pure water, is stored in after filtration in bicarbonate of ammonia storage tank.
In the enamel reaction still of 5000L, add the mother liquor 500L extracted out in embodiment 3, high-pruity barium carbonate 2kg is as crystal seed.
Start stirring rake, adjustment stirring arm rotating speed is 90r/min, normal temperature starts to drip, two kinds of solution are added in enamel reaction still simultaneously, barium chloride solution initial flow is 20.0L/min, ammonium bicarbonate soln initial flow is 38.0L/min, the pH value of measured reaction liquid in dropping process, pH is made to remain between 5.4 ~ 5.7 by adjusting two kinds of solution floies, in adjustment process, the flow controlling barium chloride solution is 15-25L/min, and make between dropping process used time 0.8-2.0 hour, two kinds of solution all dropwise.
After dropwising, at the uniform velocity stir 30min, after completion of the reaction, leave standstill 30min.
The upper strata mother liquor of reaction solution is pumped, barium carbonate sediment deionized water wash to wash water chloride ion content is 70ppm, centrifuging, then by filter cake at 200 DEG C dry 8 hours, finally obtaining particle diameter in particle is 11.22 μm, and span is 2.015, and purity is the barium carbonate product of 99.8%, bulk specific weight 1.30, good fluidity.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.
Claims (6)
1. a preparation method for Large stone high-pruity barium carbonate, is characterized in that: it specifically comprises the steps:
(1) solution is configured: at 15 ~ 25 DEG C, prepare ammonium bicarbonate aqueous solution and barium chloride solution;
(2) ready reaction still: add pure water in a kettle.;
(3) drip: the stirring rake starting reactor, two kinds of solution of preparation in step (1) are added drop-wise in reactor simultaneously;
(4) stir: be at the uniform velocity stirred to after dropwising and react completely, obtain barium carbonate sediment;
(5) be separated: the reaction solution of step (4) gained is left standstill, then upper strata mother liquor be separated with barium slurry;
(6) aftertreatment: barium slurry, through washing, filtration, oven dry, to obtain final product;
Wherein, the concentration of the ammonium bicarbonate aqueous solution described in step (1) is 70 ~ 110g/L, and the concentration of described barium chloride solution is 200 ~ 240g/L;
In described step (2), add the high-pruity barium carbonate of 1% ~ 5% of barium carbonate theoretical yield after adding pure water in a kettle. as crystal seed;
In described step (3), control the dropping flow of barium chloride solution, make the time for adding of solution be 0.8 ~ 2.0 hour, the dropping flow of described ammonium bicarbonate soln, according to the dropping Flow-rate adjustment of barium chloride solution, controls the pH value of reaction solution between 5.4 ~ 5.7;
In the dropping process of described step (4), the rotating speed controlling described stirring rake is 40 ~ 110r/min, makes the pH value of reaction kettle for reaction liquid between 5.4 ~ 5.7 by the rate of addition controlling barium chloride solution and ammonium bicarbonate soln; Be that 1:2.2 ~ 1:2.4 passes in reactor by the mol ratio of bariumchloride and bicarbonate of ammonia.
2. the preparation method of a kind of Large stone high-pruity barium carbonate according to claim 1, is characterized in that: the water yield added in reactor described in step (2) there was not stirring rake bottom to be advisable with liquid level.
3. the preparation method of a kind of Large stone high-pruity barium carbonate according to claim 1, is characterized in that: the slurry of barium described in step (6) is less than 70ppm with chloride ion content in 20 ~ 95 DEG C of pure water to washing water.
4. the preparation method of a kind of Large stone high-pruity barium carbonate according to claim 1, is characterized in that: in described step (6), bake out temperature is 110 ~ 240 DEG C.
5. the preparation method of a kind of Large stone high-pruity barium carbonate according to claim 1, is characterized in that: the pure water added in described step (2) can be replaced by the mother liquor obtained described in step (5).
6. the preparation method of a kind of Large stone high-pruity barium carbonate according to any one of claim 1-5, is characterized in that: it specifically comprises the steps:
(1) solution is configured: normal temperature compound concentration is the ammonium bicarbonate aqueous solution of 70 ~ 110g/L, and configuration concentration is the barium chloride solution of 200-240g/L;
(2) ready reaction still: add pure water or mother liquor in a kettle., the water yield added accounts for 1/12 ~ 1/9 of reactor volume;
(3) crystal seed is added: add the high-pruity barium carbonate of 1% ~ 5% of barium carbonate theoretical yield in a kettle. as crystal seed;
(4) drip: the stirring rake starting reactor, control rotating speed of agitator is 40 ~ 110r/min, by step
(1) in, two kinds of solution of preparation are that 1:2.2 ~ 1:2.4 passes in reactor simultaneously by the mol ratio of bariumchloride and bicarbonate of ammonia, control the dropping flow of barium chloride solution, the time for adding of solution is made to be 0.8 ~ 2.0 hour, the dropping flow of described ammonium bicarbonate soln is according to the dropping Flow-rate adjustment of barium chloride solution, in dropping process, make the pH value of reaction kettle for reaction liquid between 5.4 ~ 5.7 by the rate of addition controlling barium chloride solution and ammonium bicarbonate soln;
(5) stir: at the uniform velocity stirring 20 ~ 40min after dropwising, to reacting completely, obtaining barium carbonate sediment;
(6) be separated: the reaction solution of step (4) gained is left standstill, by upper strata liquor abstraction, obtain barium slurry;
(7) aftertreatment: in step (6), gained barium slurry is less than 70ppm with chloride ion content in 20 ~ 95 DEG C of pure water to washing water, and then filter, filter cake is dried under the condition of 110 ~ 240 DEG C, to obtain final product.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104108A (en) * | 1987-06-05 | 1988-12-14 | 福建省化学工业科学技术研究所 | Method for producing barium carbonate |
| CN101302027A (en) * | 2008-05-30 | 2008-11-12 | 仙桃市展朋新材料有限公司 | Production method of high-pure electronic grade barium carbonate |
| CN101708860A (en) * | 2009-12-10 | 2010-05-19 | 城口县科学技术委员会 | Method for preparing high-purity ultrafine barium carbonate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080104866A (en) * | 2007-05-29 | 2008-12-03 | 익스팬테크주식회사 | Purification method of baco3 |
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2014
- 2014-04-23 CN CN201410164161.4A patent/CN103896320B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104108A (en) * | 1987-06-05 | 1988-12-14 | 福建省化学工业科学技术研究所 | Method for producing barium carbonate |
| CN101302027A (en) * | 2008-05-30 | 2008-11-12 | 仙桃市展朋新材料有限公司 | Production method of high-pure electronic grade barium carbonate |
| CN101708860A (en) * | 2009-12-10 | 2010-05-19 | 城口县科学技术委员会 | Method for preparing high-purity ultrafine barium carbonate |
Non-Patent Citations (2)
| Title |
|---|
| "反应沉淀法制备碳酸钡纳米粉体的研究";肖世新等;《无机盐工业》;20110930;第33卷(第5期);第3节结论部分、第3节结论部分 * |
| "由工业氯化钡制备高纯度碳酸钡的研究";于跃芹等;《海湖盐与化工》;19970717;第28卷(第4期);1-3 * |
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