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Method for processing calcium carbonate by modifying starch

A technology of starch modification and calcium carbonate, which is applied in the field of paper-making fillers, can solve the problems of increasing the cost of the paper-making industry, achieve the effect of lowering the production cost and improving the performance

Inactive Publication Date: 2010-06-23
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nowadays, the world's paper industry is plagued by a series of problems. The price of wood fiber pulp is gradually rising. The waste generated in the papermaking process and the environmental protection problems are solved, which significantly increases the cost of the paper industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Weigh 2.5 grams of cornstarch, prepare a 5% solution, add 0.4 grams of cetyltrimethylammonium bromide and adjust the pH to 9 with 1N sodium hydroxide, and stir for 40 minutes at 60°C . Add 15 grams of calcium carbonate to the above reaction solution, heat and cook at 70-80°C with stirring, the reaction time is 30 minutes, after the reaction, adjust the pH to 7 with 1N hydrochloric acid, heat and dry in an oven, cool, and crush into 100-mesh particles vested filler.

Embodiment 2

[0013] Example 2: Weigh 2.5 grams of potato starch and prepare a 5% solution, add 0.4 grams of polyethylene glycol stearate and adjust the pH to 9 with 1N sodium hydroxide, and stir for 40 minutes at 60°C . Add 15 grams of calcium carbonate to the above reaction solution, heat and cook at 70-80°C with stirring, the reaction time is 30 minutes, after the reaction, adjust the pH to 7 with 1N hydrochloric acid, heat and dry in an oven, cool, and grind into 100 mesh Particles are obtained as fillers.

Embodiment 3

[0014] Example 3: 2.5 grams of cornstarch was weighed and prepared into a 10% solution, 0.5 grams of phosphate was added, adjusted to pH=9 with 1N sodium hydroxide, and stirred at 60° C. for 40 minutes. Add 15 grams of calcium carbonate to the above reaction solution, heat and cook at 70-80°C with stirring, the reaction time is 30 minutes, after the reaction, adjust the pH to 7 with 1N hydrochloric acid, heat and dry in an oven, cool, and grind into 100 mesh Particles are obtained as fillers.

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Abstract

The invention relates to a method for processing calcium carbonate by modifying starch and provides a paper filler. In the invention, starch is used as the raw material, then 2.5-7.5g of starch is weighed and prepared into solution with a concentration of 5-10%, 0.2-0.7g of modifier is added to the solution, 1N sodium hydroxide is used to adjust pH value of the solution to 9 and then the solution is stirred for 30-40min at 60 DEG C.15-30g of calcium carbonate is added to the reaction liquid, the mixture is heated and boiled to 70-80 DEG C while being stirred, the reaction time lasts 20-40min.After the reaction is over, 1N hydrochloric acid is used to adjust the pH value of the reaction liquid to 7.Then the reaction liquid is heated, dried, pulverized to particles of 100 meshes in a drying oven, thus obtaining the filler. The paper filler of the invention features higher retention, long brisement and greatly improved burst index. Therefore the paper filler can remarkably improve paper strength, replace wood fiber and have the function of protecting the environment, reduce paper production cost and improve paper usability.

Description

technical field [0001] The invention provides a papermaking filler. The present invention mainly adopts modified starch to treat calcium carbonate, and the treated calcium carbonate filler is applied to pulp to partially replace wood fiber and play a role in protecting the environment, reducing the production cost of the bottom paper, and improving the use performance. Background technique [0002] Nowadays, the world paper industry is plagued by a series of problems. The price of wood fiber pulp is gradually rising, and the waste generated in the papermaking process and the environmental protection problems are solved, which significantly increases the cost of the paper industry. Therefore, increasing fillers in paper has attracted the attention of the global paper industry in recent years. In order to meet the performance of paper and increase the proportion of fillers, many countries in the world are conducting research in this area, including flocculation, filling in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/10D21H17/69
Inventor 王万森高玉杰何秋实李静吴家全姚培正
Owner TIANJIN UNIV OF SCI & TECH
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