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Calcium sulfate whisker preparation process

A calcium sulfate whisker and preparation process technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of short and broken whisker products, complicated process, high energy consumption, etc., and achieve the reduction of operation difficulty and operation steps The effect of simplicity and simple operation steps

Pending Publication Date: 2021-06-11
郭日辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process is complicated, and whisker products are prone to short fragments, flakes, and incomplete shapes.
[0004] At this stage, the calcium sulfate whisker preparation process is outdated, which leads to high energy consumption, complicated process, and poor quality of whisker shape. Today, with the rapid development of industry, the existing calcium sulfate whisker preparation process can no longer meet people's demands for environmental protection and simplicity. and high quality requirements

Method used

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  • Calcium sulfate whisker preparation process
  • Calcium sulfate whisker preparation process
  • Calcium sulfate whisker preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]The embodiment of the present application provides a calcium sulfate whisker, which is prepared by the following process: select 1 ton of heavy calcium carbonate with a purity of 99%, 2.9 tons of hydrochloric acid with a mass percentage of 20%, and mix heavy calcium carbonate with hydrochloric acid Put it into the reaction tank and stir for 4 hours to react for the first time to filter to obtain a calcium chloride solution with a mass percentage of 20%, then put 100 kg of calcium chloride solution and 13 kg of 70% concentrated sulfuric acid into the reaction kettle and stir 5min, put it aside for 20min and then filter twice to obtain 124 kg of calcium sulfate dihydrate whiskers, take 3.1 kg of silane coupling agent, add water and hydrolyze, and mix the calcium sulfate dihydrate whiskers with the silane coupling agent after adding water and hydrolyzing , add water until the calcium sulfate dihydrate whiskers are just covered, take out the calcium sulfate dihydrate whiskers...

Embodiment 2

[0030] The embodiment of the present application provides a calcium sulfate whisker, which is prepared by the following process: select 1 ton of heavy calcium carbonate with a purity of 99%, 2.9 tons of hydrochloric acid with a mass percentage of 25%, and mix heavy calcium carbonate with hydrochloric acid Put it into the reaction tank and stir it for 4 hours and then filter it for the first time to obtain a calcium chloride solution with a mass percentage of 40%, then put 100 kg of calcium chloride solution and 25 kg of 70% concentrated sulfuric acid into the reaction kettle and stir 5min, after standing still for 30min, filter twice to obtain 132 kg of calcium sulfate dihydrate whiskers, take 4.62 kg of silane coupling agent, add water and hydrolyze, and mix calcium sulfate dihydrate whiskers with the silane coupling agent after adding water and hydrolyzing , add water until the whiskers of calcium sulfate dihydrate are just covered, take out the whiskers of calcium sulfate di...

Embodiment 3

[0032] The embodiment of the present application provides a calcium sulfate whisker, which is prepared by the following process: select 1 ton of heavy calcium carbonate with a purity of 99.4%, 2.9 tons of hydrochloric acid with a mass percentage of 34%, and mix heavy calcium carbonate with hydrochloric acid Put it into the reaction tank to stir for 1 hour and then filter it for the first time to obtain a calcium chloride solution with a mass percentage of 30%, then put 100 kg of calcium chloride solution and 25 kg of concentrated sulfuric acid with a mass percentage of 90% into the reaction kettle and stir 3min, put it aside for 25min and then filter twice to obtain 134 kg of calcium sulfate dihydrate whiskers, take 4.02 kg of silane coupling agent, add water and hydrolyze, and mix calcium sulfate dihydrate whiskers with the silane coupling agent after adding water and hydrolyzing , add water until the whiskers of calcium sulfate dihydrate are just covered, take out the whisker...

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Abstract

The invention provides a calcium sulfate whisker preparation process, belonging to the technical field of material preparation. The calcium sulfate whisker preparation process comprises the following steps: mixing calcium carbonate and hydrochloric acid, conducting filtering for the first time to obtain a calcium chloride solution, adding concentrated sulfuric acid, conducting filtering for the second time to obtain calcium sulfate dihydrate whiskers, modifying the calcium sulfate dihydrate whiskers, conducting filtering for the third time, and performing drying to obtain calcium sulfate whiskers. The calcium sulfate whisker preparation process can reduce energy consumption in the preparation process, so the preparation process is more environment-friendly; and the preparation process is simple and convenient in steps, and the prepared calcium sulfate whiskers are more complete and are not easy to break and the like.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a preparation process for calcium sulfate whiskers. Background technique [0002] At present, calcium sulfate whiskers are mainly used in friction materials, engineering plastics and other industries in China. Due to the high manufacturing cost and mediocre quality of the existing calcium sulfate whisker products, there are problems such as uneven dispersion or difficult integration in the application of polymer materials, plastics, treatment of printing and dyeing wastewater, papermaking and other industries. Cause application difficulties, and can not promote related application industries to reduce costs. [0003] At present, domestic calcium sulfate whiskers are prepared by hydrothermal method, microemulsion method, ion exchange method, etc. Among them, the hydrothermal method is mainly used, and the yield of calcium sulfate whiskers prepared by the hydrotherma...

Claims

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Application Information

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IPC IPC(8): C30B29/62C30B29/46C30B7/14
CPCC30B29/62C30B29/46C30B7/14
Inventor 郭日辉
Owner 郭日辉