CN1152548A - Preparation process for barium carbonate used in electronic ceramic - Google Patents
Preparation process for barium carbonate used in electronic ceramic Download PDFInfo
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- CN1152548A CN1152548A CN96116009A CN96116009A CN1152548A CN 1152548 A CN1152548 A CN 1152548A CN 96116009 A CN96116009 A CN 96116009A CN 96116009 A CN96116009 A CN 96116009A CN 1152548 A CN1152548 A CN 1152548A
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- barium carbonate
- solution
- barium
- reaction
- bariumchloride
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Abstract
The present invention belongs to the field of chemical technology. Said invention mainly uses the refined barium chloride and sodium carbonate as raw material, and respectively makes them into the saturated solutions, then the saturated solutions are mixed and reacted under the condition of a certain temp, and then the obtained reaction product is washed and dried so as to obtain the invented product. Said invention is simple in process, low in cost and high in yield, and its particle size is uniform, generally is 0.8-1.0 micron.
Description
The invention belongs to chemical technology field.
Barium carbonate used in electronic ceramic is the raw material of widespread use in the electronic industrial products.Barium carbonate particle requires to have certain particle diameter and equal spoon property.Electronic ceramics is to produce the necessary raw material of various electronic components, as electrical condenser, transmitter etc.Along with the fast development of electronic industry, market is increasing to the demand of electronic ceramics.Therefore as the barium carbonate of the essential raw material of electronic ceramics, its market demand also constantly enlarges.At present, the industrial production of the barium carbonate used in electronic ceramic of our country adopts traditional technology, as carborization.This technology is raw material with the barite, obtains primary products through " pre-carbonization " and " main carbonization " two big steps, and primary products obtain barium carbonate through washing, vacuum filtration, obtain desired product through super-dry, pulverizing, screening again.This technical process complexity, cost height produce obnoxious flavoures such as sulfurous gas, hydrogen sulfide in the technological process, cause environmental pollution.Use the product of this explained hereafter in addition, the bad control of its grain diameter and shape, this also is a big shortcoming of traditional technology.The production technique of external this series products has adopted comparatively advanced production technique.As the U.S., adopt direct solution with barium salt and yellow soda ash to prepare barium carbonate technology at the autoclave internal reaction, the characteristics of this technology are the equipment advanced persons, and investment is big, but the particle size distribution of product is inhomogeneous, does not often reach the requirement of barium carbonate used in electronic ceramic sometimes.Japanese then utilize the solution of volatile salt and nitrate of baryta to be raw material, the technology of the synthetic barium carbonate used in electronic ceramic of solution.Though can obtain qualified product with this technology, the equipment complexity costs an arm and a leg, and technology needs with Glacial acetic acid or ammonium acetate as additive, and this class additive has corrosive nature to metallic reactors.Can develop a kind of new production barium carbonate used in electronic ceramic technology in conjunction with the actual national conditions of China, and this technology investment is little, the productive rate height, quality product is excellent.For this reason, people have done number of research projects.
Purpose of the present invention is exactly the shortcoming for the uneven spoon of the technical process complexity that solves the traditional technology existence, cost height, contaminate environment and grain diameter, and has proposed a kind of new production technique.
Main contents of the present invention: this technology utilization purified bariumchloride and yellow soda ash are raw material, they are mixed with saturated solution respectively, in 50～120 ℃ of scopes of temperature, mutual hybrid reaction, obtain throw out, to its washing, drying, make the barium carbonate used in electronic ceramic product then, concrete production stage is as follows:
(1) at first choosing purified bariumchloride and yellow soda ash is raw material, and they are made into saturated solution respectively.After solution prepared, adding concentration A in barium chloride solution was the polyacrylamide solution of 360～1000ppm, then
(2) barium chloride solution is sprayed in the reactor that fills saturated solution of sodium carbonate,
A. as temperature of reaction t
1In the time of 50～90 ℃, the solution in the reaction vessel stirs with magneton,
Magneton rotating speed m is controlled at 90～120 rev/mins, the jet velocity n of bariumchloride
1Be controlled at
5～7ml/ branch, the barium chloride solution that adds during reaction wants excessive 2%;
B. as temperature of reaction t
2In the time of 90～120 ℃, reaction vessel is enclosed, adopts
Moving agitator stirs, and rotating speed m is 90～120 rev/mins, the jet velocity n of bariumchloride
2
Be 3～5ml/ branch, the barium chloride solution that adds during reaction wants excessive 2%; After reaction finishes
(3) barium carbonate with gained washs with distilled water, then
(4) washing again in the ammoniacal liquor adding distilled water, heat then, evaporate, last
(5) with barium carbonate dry a few hours under 120～200 ℃ of temperature of gained, finally obtain the electroceramics barium carbonate.Process flow sheet as shown in Figure 1.
Processing step of the present invention is simple, and required equipment is simple, invests for a short time, and cost is low, pollutes for a short time, and the productive rate height meets the national conditions of China.And utilize this technology to make barium carbonate product, and superior in quality, stable performance, the equal spoon of grain diameter, spherical in shape.Grain diameter is generally at 0.8～1.0 μ m.The present invention will be the development of China's electronic industry, and the fine raw material is provided.
Fig. 1 is preparation technology's schema of barium carbonate used in electronic ceramic
Embodiment 1
When temperature is 60 ℃, the refining bariumchloride of 31.6g is dissolved in the 100g water, make saturated solution, again 15.6g prepared calcium carbonate sodium is dissolved in the 27g water, make saturated solution, adding concentration then in the bariumchloride saturated solution is the polyacrylamide solution 5ml of 500ppm, again barium chloride solution is sprayed in the reaction vessel that fills yellow soda ash with the jet velocity that 6ml/ divides, solution stirs with magneton, the magneton rotating speed is 100 rev/mins, after reaction finishes, with the gained barium carbonate once with distilled water wash, filtering, is 0.26ml concentration that 1 mole of every liter of ammoniacal liquor adds in the distilled water again, and washing once again, heating evaporation descends the barium carbonate of gained dry 2 hours at 180 ℃ then, finally obtains the 29.4g barium carbonate used in electronic ceramic.Grain diameter 0.8～1.0 μ m is spherical.
Claims (4)
1, the preparation technology of barium carbonate used in electronic ceramic is characterized in that this technology in turn includes the following steps:
(1) prepare the full sharp solution of bariumchloride, yellow soda ash at first respectively, after solution prepares,
Adding concentration in barium chloride solution is the polyacrylamide solution of A, then
(2) barium chloride solution is sprayed in the reaction vessel that fills saturated solution of sodium carbonate,
A, be t in the temperature of reaction interval
1The time, solution stirs with magneton, and the magneton rotating speed is
M, the jet velocity of bariumchloride is n
1, the barium chloride solution of adding wants excessive 2%;
B, be t in the temperature of reaction interval
2The time, reaction vessel changes into closed, with electronic
Agitator stirs, and rotating speed also is m, and the jet velocity of bariumchloride is n
2Add
The barium chloride solution of going into wants excessive 2%;
After reaction finishes
(3) with gained barium carbonate distilled water wash, then
(4) being used for washing barium carbonate in the ammoniacal liquor adding distilled water again, heat then, evaporate,
At last
(5) with barium carbonate at 120～200 ℃ of temperature range inner dryings, obtain used in electronic ceramic
Barium carbonate product.
2, the preparation technology of barium carbonate used in electronic ceramic according to claim 1 is characterized in that
The concentration of polyacrylamide solution A that adds in barium chloride solution is 360～1000ppm.
3, the preparation technology of barium carbonate used in electronic ceramic according to claim 1 is characterized in that
Temperature of reaction t
1Be 50～90 ℃, magneton rotating speed m is 90～120 rev/mins, bariumchloride
Jet velocity n
1It is 5～7ml/ branch.
4, electronics porcelain according to claim 1 is characterized in that reaction temperature with the preparation of barium carbonate
When degree t2 was 90～120 ℃, reaction vessel stirred with electric mixer for what seal,
Rotating speed m is 90～120 rev/mins, the jet velocity n of bariumchloride
2It is 3～5ml/ branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116009A CN1058468C (en) | 1996-10-18 | 1996-10-18 | Preparation process for barium carbonate used in electronic ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116009A CN1058468C (en) | 1996-10-18 | 1996-10-18 | Preparation process for barium carbonate used in electronic ceramic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1152548A true CN1152548A (en) | 1997-06-25 |
| CN1058468C CN1058468C (en) | 2000-11-15 |
Family
ID=5123202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96116009A Expired - Fee Related CN1058468C (en) | 1996-10-18 | 1996-10-18 | Preparation process for barium carbonate used in electronic ceramic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058468C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849772A (en) * | 2012-09-19 | 2013-01-02 | 中国核动力研究设计院 | Ba<14>CO3 preparation method |
| CN106186023A (en) * | 2016-07-01 | 2016-12-07 | 广州建丰五矿稀土有限公司 | A kind of preparation method of bigger serface brium carbonate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3060729B2 (en) * | 1992-07-22 | 2000-07-10 | 東レ株式会社 | Multilayer wiring board |
-
1996
- 1996-10-18 CN CN96116009A patent/CN1058468C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849772A (en) * | 2012-09-19 | 2013-01-02 | 中国核动力研究设计院 | Ba<14>CO3 preparation method |
| CN102849772B (en) * | 2012-09-19 | 2014-06-11 | 中国核动力研究设计院 | Ba<14>CO3 preparation method |
| CN106186023A (en) * | 2016-07-01 | 2016-12-07 | 广州建丰五矿稀土有限公司 | A kind of preparation method of bigger serface brium carbonate |
| CN106186023B (en) * | 2016-07-01 | 2018-09-11 | 广州建丰五矿稀土有限公司 | A kind of preparation method of bigger serface barium carbonate |
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| Publication number | Publication date |
|---|---|
| CN1058468C (en) | 2000-11-15 |
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