CN105585040A - A preparing method of active calcium carbonate - Google Patents
A preparing method of active calcium carbonate Download PDFInfo
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- CN105585040A CN105585040A CN201410569064.3A CN201410569064A CN105585040A CN 105585040 A CN105585040 A CN 105585040A CN 201410569064 A CN201410569064 A CN 201410569064A CN 105585040 A CN105585040 A CN 105585040A
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- calcium carbonate
- gypsum
- sodium carbonate
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Abstract
The invention relates to a preparing method of active calcium carbonate. The method includes mixing gypsum and sodium carbonate to form a gypsum-calcium carbonate coexisting substance, dissolving with an acid, precipitating with sodium carbonate, activating and drying to obtain the active calcium carbonate. The temperature for mixing the gypsum and the sodium carbonate C to form the gypsum-calcium carbonate coexisting substance is 40-50 DEG C. The step of dissolving with the acid is a step of adding concentrated hydrochloric acid into a container, and stirring continuously until no gas escape. The step of precipitating with the sodium carbonate is a step of adding a proper amount of the sodium carbonate into a solution until no precipitate generates. The step of activating is a step of adding ammonium chloride into the container and activating. The step of drying is performed at 110-130 DGC for 30-5 min. The method is reasonable in design and convenient in operation. The prepared active calcium carbonate is high in purity, fine in particles, high in activity and simple in process.
Description
Technical field
The present invention relates to a kind of preparation method of chemical products, be specifically related to a kind of preparation method of activated Calcium carbonate.
Background technology
Activated Calcium carbonate, as the high-grade filler of high filler loading capacity, is widely used in the industries such as rubber, plastics, plastic-steel door and window, PVC CABLE MATERIALS, high grade paint, tubing, tire, sole, polyvinyl blow molding, sealing joint strip, glass fiber reinforced plastics product, cable packaging cloth, papermaking, building materials, ink, daily-use chemical industry, weaving, feed, food additives. In prior art, raw material calcinings such as lime stones is generated lime and carbon dioxide by the traditional processing technology formula of activated Calcium carbonate, the digestion lime that adds water again generates milk of lime, and then passing into carbon dioxide carbonization milk of lime generation precipitation of calcium carbonate, last precipitation of calcium carbonate just makes activated Calcium carbonate through dewatering, be dried and pulverizing.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, and a kind of preparation method of activated Calcium carbonate newly, that method design finished product activity more next rationally, that make is high is provided.
Technical problem to be solved by this invention is to realize by following technical scheme. The present invention is a kind of preparation method of activated Calcium carbonate, is characterized in: gypsum is mixed with sodium carbonate, forms gypsum and calcium carbonate concurrent, then through acid-soluble, soda ash heavy, activation, be dried and make activated Calcium carbonate; It is 40-50 DEG C that described gypsum and sodium carbonate are mixed to form the temperature that gypsum and calcium carbonate coexists; Described acid-soluble be to add concentrated hydrochloric acid in container, constantly stir, until overflow without gas; Described soda ash is heavy is in solution, to add appropriate sodium carbonate, generates until no longer include sediment; Described activation is to add ammonium chloride to activate in container; Described baking temperature is 110-130 DEG C, and be 30-5-minute drying time.
The preparation method of a kind of activated Calcium carbonate of the present invention, further: described temperature when gypsum and sodium carbonate are formed to gypsum and calcium carbonate and coexists is 45 DEG C.
The preparation method of a kind of activated Calcium carbonate of the present invention, further: described baking temperature is 120 DEG C, be 40 minutes drying time.
The preparation method of a kind of activated Calcium carbonate of the present invention, further: when described activation, be 20-25% to adding ammonium chloride to reach ammonium chloride mass concentration in container.
The preparation method of a kind of activated Calcium carbonate of the present invention, further, its concrete steps are as follows: sodium carbonate liquor is heated to 45 DEG C, slowly adds gypsum, under 45 DEG C of temperature conditions, constantly stir 3 hours, be down to room temperature; Add concentrated hydrochloric acid, constantly stir, treat to overflow without gas, filter, filter residue is the gypsum not reacting, and reclaims and continues to use. In container, add ammonium chloride, stir; Divide and slowly add sodium carbonate for several times, filter, continue to add sodium carbonate in solution, generate until no longer include sediment; Merge filter residue, dry with drying box, baking temperature is 120 DEG C, and be 40 minutes drying time.
Compared with prior art, the inventive method is reasonable in design, easy to operate, and prepared activated Calcium carbonate purity is high, and particle is thin, active good, and technique is simple.
Detailed description of the invention
Below further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, a kind of preparation method of activated Calcium carbonate, mixes gypsum with sodium carbonate, form gypsum and calcium carbonate concurrent, then through acid-soluble, soda ash heavy, activation, be dried and make activated Calcium carbonate; It is 40-50 DEG C that described gypsum and sodium carbonate are mixed to form the temperature that gypsum and calcium carbonate coexists; Described acid-soluble be to add concentrated hydrochloric acid in container, constantly stir, until overflow without gas; Described soda ash is heavy is in solution, to add appropriate sodium carbonate, generates until no longer include sediment; Described activation is to add ammonium chloride to activate in container; Described baking temperature is 110-130 DEG C, and be 30-5-minute drying time.
Embodiment 2, in the preparation method of a kind of activated Calcium carbonate described in embodiment 1: described temperature when gypsum and sodium carbonate are formed to gypsum and calcium carbonate and coexists is 45 DEG C.
Embodiment 3, in the preparation method of a kind of activated Calcium carbonate described in embodiment 1: described baking temperature is 120 DEG C, and be 40 minutes drying time.
Embodiment 4, in the preparation method of a kind of activated Calcium carbonate described in embodiment 1: be 20-25% to adding ammonium chloride to reach ammonium chloride mass concentration in container when described activation.
Embodiment 5, in the preparation method of a kind of activated Calcium carbonate described in embodiment 1: its concrete steps are: sodium carbonate liquor is heated to 45 DEG C, slowly adds gypsum, constantly stir 3 hours under 45 DEG C of temperature conditions, be down to room temperature; Add concentrated hydrochloric acid, constantly stir, treat to overflow without gas, filter, filter residue is the gypsum not reacting, and reclaims and continues to use; In container, add ammonium chloride, stir; Divide and slowly add sodium carbonate for several times, filter, continue to add sodium carbonate in solution, generate until no longer include sediment; Merge filter residue, dry with drying box, baking temperature is 120 DEG C, and be 40 minutes drying time.
Embodiment 6, a kind of preparation method's experiment of activated Calcium carbonate:
2000 ml waters are put into container, be heated to 45 DEG C, add 600 grams, sodium carbonate, constantly stir, it is dissolved, make sodium carbonate liquor, and keep temperature;
Take 800 grams of gypsum, pulverize, slowly add in sodium carbonate liquor, under 45 DEG C of temperature conditions, constantly stir 3 hours, be down to room temperature;
In container, add 700 milliliters of concentrated hydrochloric acids, constantly stir, treat to overflow without gas, filter, filter residue is the gypsum not reacting, and reclaims and continues to use;
In container, add 50 grams of ammonium chlorides, stir; Divide and slowly add sodium carbonate for several times, filter, continue to add sodium carbonate in solution, generate until no longer include sediment;
Merge filter residue, dry with drying box, baking temperature is 120 DEG C, and be 40 minutes drying time, obtains activated Calcium carbonate.
Claims (5)
1. a preparation method for activated Calcium carbonate, is characterized in that: gypsum is mixed with sodium carbonate, forms gypsum and calcium carbonate concurrent, then through acid-soluble, soda ash heavy, activation, be dried and make activated Calcium carbonate; It is 40-50 DEG C that described gypsum and sodium carbonate are mixed to form the temperature that gypsum and calcium carbonate coexists; Described acid-soluble be to add concentrated hydrochloric acid in container, constantly stir, until overflow without gas; Described soda ash is heavy is in solution, to add appropriate sodium carbonate, generates until no longer include sediment; Described activation is to add ammonium chloride to activate in container; Described baking temperature is 110-130 DEG C, and be 30-5-minute drying time.
2. the preparation method of a kind of activated Calcium carbonate according to claim 1, is characterized in that: described temperature when gypsum and sodium carbonate are formed to gypsum and calcium carbonate and coexists is 45 DEG C.
3. the preparation method of a kind of activated Calcium carbonate according to claim 1, is characterized in that: described baking temperature is 120 DEG C, and be 40 minutes drying time.
4. the preparation method of a kind of activated Calcium carbonate according to claim 1, is characterized in that: when described activation, be 20-25% to adding ammonium chloride to reach ammonium chloride mass concentration in container.
5. the preparation method of a kind of activated Calcium carbonate according to claim 1, is characterized in that: its concrete steps are: sodium carbonate liquor is heated to 45 DEG C, slowly adds gypsum, under 45 DEG C of temperature conditions, constantly stir 3 hours, be down to room temperature; Add concentrated hydrochloric acid, constantly stir, treat to overflow without gas, filter, filter residue is the gypsum not reacting, and reclaims and continues to use; In container, add ammonium chloride, stir; Divide and slowly add sodium carbonate for several times, filter, continue to add sodium carbonate in solution, generate until no longer include sediment; Merge filter residue, dry with drying box, baking temperature is 120 DEG C, and be 40 minutes drying time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569064.3A CN105585040A (en) | 2014-10-23 | 2014-10-23 | A preparing method of active calcium carbonate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410569064.3A CN105585040A (en) | 2014-10-23 | 2014-10-23 | A preparing method of active calcium carbonate |
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| CN105585040A true CN105585040A (en) | 2016-05-18 |
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| CN201410569064.3A Pending CN105585040A (en) | 2014-10-23 | 2014-10-23 | A preparing method of active calcium carbonate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445190A (en) * | 2017-09-30 | 2017-12-08 | 广西华洋矿源材料有限公司 | A kind of method that high-quality superfine light calcium carbonate is prepared using gypsum as raw material |
-
2014
- 2014-10-23 CN CN201410569064.3A patent/CN105585040A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445190A (en) * | 2017-09-30 | 2017-12-08 | 广西华洋矿源材料有限公司 | A kind of method that high-quality superfine light calcium carbonate is prepared using gypsum as raw material |
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Application publication date: 20160518 |
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| WD01 | Invention patent application deemed withdrawn after publication |