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A method for preparing calcium carbonate micro-nano spheres by regulating and controlling calcium lignosulfonate

A technology of calcium lignosulfonate and calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of difficult control of reaction conditions, complicated preparation process and high cost of organic matter sources

Inactive Publication Date: 2015-09-09
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of complex preparation process, high cost of organic matter sources, and uneasy control of reaction conditions in the preparation of calcium carbonate crystal particles with specific shape and size, at the same time, resource utilization of sulphite pulping waste liquor has opened up new opportunities for calcium lignosulfonate A new way of high-value utilization, the purpose of the present invention is to provide a method for preparing calcium carbonate micro-nano balls by using calcium lignosulfonate regulation

Method used

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  • A method for preparing calcium carbonate micro-nano spheres by regulating and controlling calcium lignosulfonate
  • A method for preparing calcium carbonate micro-nano spheres by regulating and controlling calcium lignosulfonate
  • A method for preparing calcium carbonate micro-nano spheres by regulating and controlling calcium lignosulfonate

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Effect test

Embodiment 1

[0020] 1) Under the action of mechanical stirring, dissolve the calcium lignosulfonate derived from coniferous wood in distilled water, and adjust the pH value with NaOH solution to form an organic solution of calcium lignosulfonate at 40 g / L and pH 11;

[0021] 2) Under the action of mechanical stirring, add 10mL of 0.5mol / L CaCl with pH=7 to 10mL of calcium lignosulfonate organic matter solution obtained in step 1) 2 solution, forming calcium lignosulfonate-CaCl 2 mixed growth system;

[0022] 3) Under the condition of stirring speed of 150r / min and 30℃, 0.5mol / L Na with pH=7 2 CO 3 The solution was added dropwise to the calcium lignosulfonate-CaCl obtained in step 2) 2 Mixed growth system, Na 2 CO 3 solution with calcium lignosulfonate-CaCl 2 The volume ratio of the mixed growth system is 1:2. After the dropwise addition, cool the above solution to 25°C at room temperature, let it stand for crystallization for 24 hours, and vacuum filter the reaction system to obtain ...

Embodiment 2

[0024] 1) Under the action of mechanical stirring, dissolve the calcium lignosulfonate derived from broad-leaved wood in distilled water, and adjust the pH value with NaOH solution to form a 30g / L, pH9 calcium lignosulfonate organic matter solution;

[0025] 2) Under the action of mechanical stirring, add 10mL of 0.5mol / L CaCl with pH=7 to 10mL of calcium lignosulfonate organic matter solution obtained in step 1) 2 solution, forming calcium lignosulfonate-CaCl 2 mixed growth system;

[0026] 3) Under the condition of stirring speed of 150r / min and 40℃, 0.5mol / L Na with pH=7 2 CO 3 The solution was added dropwise to the calcium lignosulfonate-CaCl obtained in step 2) 2 Mixed growth system, Na 2 CO 3 solution with calcium lignosulfonate-CaCl 2 The volume ratio of the mixed growth system is 1:1. After the dropwise addition, cool the above solution to 25°C at room temperature, let it stand for crystallization for 24 hours, and vacuum filter the reaction system to obtain crys...

Embodiment 3

[0028] 1) Dissolve calcium lignosulfonate from Poaceae in distilled water under the action of mechanical stirring, and adjust the pH value with NaOH solution to form a 20g / L, pH7 calcium lignosulfonate organic solution;

[0029] 2) Under the action of mechanical stirring, add 10mL of 0.5mol / L CaCl with pH=7 to 10mL of calcium lignosulfonate organic matter solution obtained in step 1) 2 solution, forming calcium lignosulfonate-CaCl 2 mixed growth system;

[0030] 3) Under the condition of stirring speed of 150r / min and 50℃, 0.5mol / L Na with pH=7 2 CO 3 The solution was added dropwise to the calcium lignosulfonate-CaCl obtained in step 2) 2 Mixed growth system, Na 2 CO 3 solution with calcium lignosulfonate-CaCl 2The volume ratio of the mixed growth system is 2:1. After the dropwise addition, cool the above solution to 25°C at room temperature and let it stand for crystallization for 24 hours. Vacuum filter the reaction system to obtain crystals, which are washed with dist...

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Abstract

The invention discloses a method for regulating and controlling preparation of calcium carbonate micro-nanospheres through calcium lignosulfonate. The method is characterized by taking calcium lignosulfonate as an organic substrate on the basis of a biological mineralization principle, and changing such technological parameters as calcium lignosulfonate concentration, concentration ratio of Ca<2+> to CO3<2->, system temperature, system pH value and the like, so as to regulate and control regulation of calcium carbonate micro-nanospheres differing in morphology and size, thus meeting application demands in various technological fields. The technology disclosed by the invention is rapid, efficient and environmentally friendly; and the prepared calcium carbonate micro-nanospheres differing in morphology and size, which take calcium lignosulfonate as an organic regulating and control substrate in raw materials thereof, can be widely applied to such industries as paper making, rubber, plastic and the like, and the calcium carbonate micro-nanospheres have important environmental benefit and economic value.

Description

technical field [0001] The invention relates to a method for regulating and preparing calcium carbonate micro-nano pellets, in particular to a method for regulating and preparing calcium carbonate micro-nano pellets by using calcium lignosulfonate, which belongs to the technical field of pulp and papermaking engineering. Background technique [0002] Calcium carbonate is one of the most abundant inorganic minerals on the earth, and is widely used in papermaking, rubber, plastics, coatings, ceramics, cosmetics and other industrial fields. Calcium carbonate belongs to polymorphic crystals. Calcite, aragonite and vaterite are the types of calcium carbonate in nature. In addition, there is amorphous calcium carbonate, of which the calcite type is the most stable. Under normal circumstances, the carbonization method obtains cubic calcite calcium carbonate crystals. [0003] Different industries have different requirements for the form of calcium carbonate. A series of parameter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
Inventor 张勇姚菊明马东旭杨梦梦
Owner ZHEJIANG SCI-TECH UNIV
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