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Method for preparing anti-caking strontium nitrate

A strontium nitrate and anti-caking technology, applied in the direction of calcium/strontium/barium nitrate, etc., can solve the problems that strontium nitrate is not easy to agglomerate, strontium nitrate is easy to agglomerate, etc., so as to achieve anti-caking, reduce production and use costs, and prolong The effect of storage time

Inactive Publication Date: 2011-06-15
钟德彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that strontium nitrate is easy to agglomerate, the present invention provides a method for preparing strontium nitrate, and the strontium nitrate prepared by the preparation method is not easy to agglomerate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put industrial nitric acid and industrial strontium carbonate into the reaction kettle for reaction. After the reaction is completed, remove impurities, concentrate, crystallize, and centrifuge according to the existing process. Put it in a vacuum drying oven with a temperature of 120°C and a vacuum degree of -0.06Mpa, and dry it for 2 hours, then take out the dried strontium nitrate, put it in a constant temperature airtight packaging room with a temperature of 40°C, and let it cool down to The strontium nitrate temperature is the same as the ambient temperature, and the final water content of the product is 0.1% after testing, and the product is finally packaged.

Embodiment 2

[0014] The previous process is the same as in Example 1. Put the centrifuged strontium nitrate wet material into a vacuum oven with a temperature of 125°C and a vacuum of -0.065Mpa, and dry it for 1.5 hours, then take out the dried strontium nitrate and put it in a temperature In a constant-temperature airtight packaging room at 40°C, cool with cold air until the temperature of the strontium nitrate is the same as the ambient temperature. After testing, the final moisture content of the product is 0.09%, and the product is finally packaged.

Embodiment 3

[0016] The previous process is the same as in Example 1. Put the centrifuged strontium nitrate wet material into a vacuum drying oven with a temperature of 140°C and a vacuum degree of -0.07Mpa, and dry it for 1 hour, then take out the dried strontium nitrate and put it in a temperature In a constant-temperature airtight packaging room at 50°C, cool air into it until the temperature of the strontium nitrate is the same as the ambient temperature. The final moisture content of the product is 0.085% after testing, and the product is finally packaged.

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PUM

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Abstract

The invention discloses a method for preparing anti-caking strontium nitrate. Industrial nitric acid and industrial strontium carbonate are taken as raw materials, and are sequentially subjected to reaction, impurity removal, concentration, crystallization, centrifugation, drying and packaging to form the strontium nitrate product, wherein the drying process for the strontium nitrate is that: strontium nitrate is put into a vacuum drying oven with the temperature of between 120 and 140 DEG C and the vacuum degree of -0.06 to -0.08Mpa and is dried until the final water content of the product is less than or equal to 0.1 percent; and the dried strontium nitrate is taken out and put into a homothermal enclosed environment with the temperature of between 40 and 50 DEG C, and cold air is introduced for cooling until the temperature of the strontium nitrate is same as the environmental temperature. The strontium nitrate prepared by the method is difficult to cake, and the production and use cost of customers is reduced; meanwhile, the storage time of the strontium nitrate is prolonged.

Description

technical field [0001] The invention relates to a method for preparing strontium nitrate, in particular to a method for preparing anti-caking strontium nitrate. Background technique [0002] Strontium nitrate is an important inorganic fine chemical product, used in TFT-LCD liquid crystal, PDP plasma color TV. At present, the preparation methods of strontium nitrate mostly use industrial nitric acid and industrial strontium carbonate as raw materials, and the products are obtained through reaction, impurity removal, concentration, crystallization, centrifugation, drying, and packaging. The existing dry packaging method is after dehydration, and the dry moisture is packaged at 0.3%, without purposeful control, resulting in serious agglomeration after the product comes out, and it needs to be manually crushed before it can be used, affecting the use of customers. The production cost of the customer is increased; moreover, the storage time of the product is shorter. Contents ...

Claims

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Application Information

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IPC IPC(8): C01F11/44
Inventor 钟德彬
Owner 钟德彬
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