Method for preparing calcium sulfate whiskers from phosphoric acid byproduct calcium chloride solution and sodium sulfate

A calcium chloride solution and calcium sulfate whisker technology are applied in chemical instruments and methods, solutions of liquid solvents at room temperature, single crystal growth, etc., and can solve the problems of high consumption of calcium sulfate whiskers raw materials and high energy consumption for preparation. Achieve the effect of reducing over-exploitation and consumption, high content, and increasing value

Pending Publication Date: 2021-07-13
山东创领新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the technical problems of large raw material consumption and high energy consumption of calcium sulfate whiskers, the present invention provides a method for preparing calcium

Method used

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  • Method for preparing calcium sulfate whiskers from phosphoric acid byproduct calcium chloride solution and sodium sulfate
  • Method for preparing calcium sulfate whiskers from phosphoric acid byproduct calcium chloride solution and sodium sulfate
  • Method for preparing calcium sulfate whiskers from phosphoric acid byproduct calcium chloride solution and sodium sulfate

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Embodiment 1

[0038] Such as figure 1 Shown, the phosphoric acid byproduct calcium chloride solution that the embodiment of the present invention provides and the method for preparing calcium sulfate whisker with sodium sulfate comprise the following steps:

[0039] (1) Add lime milk to the phosphoric acid by-product calcium chloride solution of the hydrochloric acid method wet method to adjust the solution to alkalinity, filter and extract the filtrate, add hydrochloric acid standard solution to the filtrate to adjust the pH value to 1; take 32ml of filtered hydrochloric acid method wet method Phosphoric acid by-product calcium chloride solution, add water to dilute to 500ml, obtain 20g / L calcium chloride solution;

[0040] (2) get 15g sodium sulfate, be configured into the sodium sulfate solution of 500ml, obtain the sodium sulfate solution of 30g / L;

[0041] (3) Mix the above two solutions, put them into the heat preservation reaction equipment, heat and stir to 120°C, and heat heat for...

Embodiment 2

[0045] Such as figure 1 Shown, the phosphoric acid byproduct calcium chloride solution that the embodiment of the present invention provides and the method for preparing calcium sulfate whisker with sodium sulfate comprise the following steps:

[0046] (1) Add lime milk to the phosphoric acid by-product calcium chloride solution of the hydrochloric acid method wet method to adjust the solution to alkalinity, filter and extract the filtrate, add hydrochloric acid standard solution to the filtrate to adjust the pH value to 1; take 128ml of filtered hydrochloric acid method wet method Phosphoric acid by-product calcium chloride solution, add water to dilute to 500ml, obtain 80g / L calcium chloride solution;

[0047] (2) get 60g sodium sulfate, be configured into the sodium sulfate solution of 500ml, obtain the sodium sulfate solution of 120g / L;

[0048] (3) Mix the above two solutions, put them into the heat preservation reaction equipment, heat and stir to 120°C, and heat heat f...

Embodiment 3

[0052] Such as figure 1 Shown, the phosphoric acid byproduct calcium chloride solution that the embodiment of the present invention provides and the method for preparing calcium sulfate whisker with sodium sulfate comprise the following steps:

[0053] (1) Add lime milk to the phosphoric acid by-product calcium chloride solution of the hydrochloric acid method wet method to adjust the solution to alkalinity, filter and extract the filtrate, add hydrochloric acid standard solution to the filtrate to adjust the pH value to 2; take 32ml of filtered hydrochloric acid method wet method Phosphoric acid by-product calcium chloride solution, add water to dilute to 500ml, obtain 20g / L calcium chloride solution;

[0054] (2) get 15g sodium sulfate, be configured into the sodium sulfate solution of 500ml, obtain the sodium sulfate solution of 30g / L;

[0055] (3) Mix the above two solutions, put them into the heat preservation reaction equipment, heat and stir to 110°C, and heat the reac...

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Abstract

The invention belongs to the technical field of preparation of calcium sulfate whiskers, and particularly relates to a phosphoric acid byproduct calcium chloride solution and a method for preparing calcium sulfate whiskers from sodium sulfate. The phosphoric acid byproduct calcium chloride solution is a hydrochloric acid method wet process phosphoric acid byproduct calcium chloride solution, and calcium sulfate whisker is prepared by adopting an acidification method: calcium salt and sulfate generate calcium sulfate precipitate under an acidic condition, the calcium sulfate precipitate is washed with hot water and then dried and dehydrated to obtain calcium sulfate hemihydrate whisker, and anhydrous calcium sulfate whisker is obtained after calcination. The raw materials are easy to obtain, the value of industrial byproducts is improved, full utilization of resources is realized, the calcium sulfate whiskers are prepared by adopting an acidification method, the production energy consumption is reduced, and the calcium sulfate whiskers with high whiteness, high purity and high content are obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of calcium sulfate whiskers, and in particular relates to a method for preparing calcium sulfate whiskers from phosphoric acid by-product calcium chloride solution and sodium sulfate. Background technique [0002] Calcium sulfate whisker is a new type of high-performance inorganic material. Calcium sulfate whisker combines the advantages of reinforcing fiber and ultrafine inorganic filler. It can be used in resin, plastic, rubber, coating, paint, paper, asphalt, friction, etc. It can be used as reinforcement and toughening agent or functional filler in sealing materials, and can be directly used as filter material, heat preservation material, fire-resistant heat insulation material, infrared reflection material and high insulation material for covering wires. [0003] At present, the preparation of calcium sulfate whiskers mainly uses natural gypsum as the main raw material, and natural gypsum...

Claims

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Application Information

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IPC IPC(8): C30B7/14C30B29/46C30B29/62
CPCC30B29/46C30B29/62C30B7/14
Inventor 温显峰王洪芳马晓鹏李金辉李洪建
Owner 山东创领新材料科技有限公司
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