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A kind of preparation method of flaky aragonite type superfine calcium carbonate particles

An ultra-fine calcium carbonate, aragonite type technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of sassafras washing resistance, anti-ultraviolet resistance, etc. to be improved, achieve low requirements for reaction conditions, reduce production costs, The effect of reducing dosage

Inactive Publication Date: 2017-03-29
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although calcium carbonate has been used in architectural coatings for a long time, its properties such as sassafras resistance and UV resistance still need to be improved

Method used

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  • A kind of preparation method of flaky aragonite type superfine calcium carbonate particles
  • A kind of preparation method of flaky aragonite type superfine calcium carbonate particles
  • A kind of preparation method of flaky aragonite type superfine calcium carbonate particles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Raw material composition and mass number:

[0030] 60 parts of calcium oxide, 0.8 parts of auxiliary inducer polyethylene glycol, 2 parts of flaky crystal two-dimensional excipient yeast powder, 1200 parts of water, appropriate amount of carbon dioxide.

[0031] 2. Preparation method:

[0032] Dissolve 60 parts of calcium oxide in 1200 parts of water after hydration reaction, add 0.8 part of auxiliary inducer polyethylene glycol, stand for 24 hours and filter to obtain Ca(OH) 2 The suspension was added to the carbonization reactor, followed by adding 2 parts of flaky crystal two-dimensional excipient yeast powder, and stirring at 50℃ and 350r / min, the flow rate was 80m 3 / (h·m 3 Suspension) CO 2 The gas distributor at the bottom of the carbonization reactor reacts with calcium hydroxide until the pH=7.5, stop feeding CO 2 After stirring at low speed for 20 minutes, filter, wash, dry at 100°C, pulverize, and package to obtain flake ultra-fine calcium carbonate products.

Embodiment 2

[0034] 1. Raw material composition and mass number:

[0035] 60 parts of calcium oxide, 1.5 parts of auxiliary inducer triethanolamine, 3.5 parts of flaky crystal two-dimensional excipient onion film, 1800 parts of water, appropriate amount of carbon dioxide.

[0036] 2. Preparation method:

[0037] Dissolve 60 parts of calcium oxide in 1,800 parts of water, hydrate it, add 1.5 parts of auxiliary inducer triethanolamine, let stand for 24 hours and filter to obtain Ca(OH) 2 The suspension is added to the carbonization reactor, and then 3.5 parts of onion film, a two-dimensional excipient of flaky crystals, is added, and the flow rate is 90m under stirring at 60℃ and 400r / min. 3 / (h·m 3 Suspension) CO 2 The gas distributor at the bottom of the carbonization reactor reacts with calcium hydroxide until the pH=7.5, stop feeding CO 2 After stirring at low speed for 20 minutes, filter, wash, dry at 100°C, pulverize, and package to obtain flake ultra-fine calcium carbonate products.

Embodiment 3

[0039] 1. Raw material composition and mass number:

[0040] 60 parts of calcium oxide, 0.5 parts of auxiliary inducer, 1.3 parts of flaky crystal two-dimensional excipient, 900 parts of water, appropriate amount of carbon dioxide.

[0041] 2. Preparation method:

[0042] Dissolve 60 parts of calcium oxide in 900 parts of water, add 0.5 part of auxiliary inducer polyethylene glycol through hydration reaction, and filter after standing for 24 hours to obtain Ca(OH) 2 The suspension was added to the carbonization reactor, and then 1.3 parts of styrene-butadiene copolymer, a two-dimensional excipient of flake crystals, was added, and the flow rate was 70m under stirring at 75℃ and 300r / min. 3 / (h·m 3 Suspension) CO 2 The gas distributor at the bottom of the carbonization reactor reacts with calcium hydroxide until pH=7.4, stop the CO 2 After stirring at low speed for 20 minutes, filter, wash, dry at 100°C, pulverize, and package to obtain flake ultra-fine calcium carbonate products.

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Abstract

The invention discloses a preparation method of flaky aragonite type superfine calcium carbonate particles. The preparation method of flaky aragonite type superfine calcium carbonate particles comprises the following steps: dissolving 60 parts by weight of calcium oxide in water, carrying out conventional hydration reaction, adding an auxiliary inducer and filtering to obtain a 3-10wt% Ca(OH)2 suspension solution, subsequently adding a flaky crystal two-dimensional excipient, introducing CO2 into a carbonation reaction kettle at the temperature of 50-95 DEG C to carry out carbonation reaction, stopping introducing CO2 till the pH is 7-7.5, continuing to carry out carbonation reaction for 20 minutes, then conventionally filtering, washing and drying via hot air to obtain the flaky aragonite type superfine calcium carbonate particle products. Through the preparation method of flaky aragonite type superfine calcium carbonate particles, flaky calcium carbonate products are obtained by adding the inducer and the flaky crystal two-dimensional excipient; the products are excellent in directional arrangement, low in possibility of agglomeration and high in capability of reflecting light; the application effect of calcium carbonate is improved; the preparation method of flaky aragonite type superfine calcium carbonate particles is simple in reaction condition, liable to operate, low in production cost and high in economic, social and ecological benefits.

Description

Technical field [0001] The invention belongs to the technical field of inorganic powder preparation, and relates to a method for preparing calcium carbonate, in particular to a method for preparing flake aragonite-type ultrafine calcium carbonate particles. Background technique [0002] Calcium carbonate is widely used in various industries and sectors such as rubber, papermaking, coatings, medicine, cosmetics, etc., whether it is ordinary grade, nanometer, and ultrafine calcium carbonate. Different industries have different requirements for the shape, particle size and surface properties of calcium carbonate. Therefore, the synthesis of calcium carbonate materials with different morphologies, different crystal forms and different particle sizes is one of the hotspots of current research. With the help of various additives, the use of solutions The synthetic method can prepare calcium carbonate with controllable shape, size and structure. [0003] Regarding the preparation of calc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
Inventor 袁爱群黄云龙朱勇白丽娟黄增尉韦冬萍周泽广
Owner GUANGXI UNIV FOR NATITIES