Industrial sodium nitrite new product and its preparation method

A sodium nitrite and manufacturing method technology, which is applied in the preparation and molding of nitrous acid and alkali metal nitrate, nitrogen oxides/oxyacids, etc., can solve the problems of reducing the content of active ingredients and affecting the specific use of products, and achieve uniform improvement , prevent easy agglomeration, wide source effect

Inactive Publication Date: 2003-03-05
TIANJIN UNIV +1
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Problems solved by technology

Although the caking problem of some foreign products has been solved, the content of active ingredients has been reduced due to the addition of anti-caking agents, which will also affect the specific use of the product

Method used

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  • Industrial sodium nitrite new product and its preparation method
  • Industrial sodium nitrite new product and its preparation method

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Embodiment approach

[0023] The present invention is further stated below:

[0024] The industrial sodium nitrite product of the present invention is granular, and the individual shape of each particle is spherical, oval or other approximate shapes, and the particle diameter is preferably controlled at 0.5-3mm, such as its particle diameter being 0.5, 1, 1.5, 2, 2.5, 3 etc. Of course, it can also be slightly larger or smaller than the above range. The moisture content of the above-mentioned granules is ≤0.5% (% on a dry basis), and it is ≤0.5%, that is, any value or interval value controlled within the range of 0-0.5% is acceptable. Of course, it is preferably ≤0.1%, ≤0.05%. The above-mentioned moisture content may also be affected by the processing environment (air humidity in the workshop) and the conditions in the packaging process.

[0025] The manufacture method of industrial sodium nitrite product of the present invention:

[0026] (1) take the industrial sodium nitrite product in the pri...

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Abstract

The present invention discloses an industrial sodium nitrite product and its production method. The physical and chemical properties of said product are as follows: it is made into the form of ball or egg granular body, grain size is 0.5-3 mm, and the water content of the described granule body is less than or equal to 0.5%. Its production method uses the existent industrial sodium nitrite product as raw material, the above-mentioned raw material is heated and moten into liquid phase, and said liquid phase is sprayed and granulated so as to obtain the invented product. Said product features low water content, no blocking and good fluidity.

Description

(1) Technical field [0001] The invention relates to an industrial sodium nitrite product and a manufacturing method. (2) Background technology [0002] Industrial sodium nitrite products in the domestic prior art are all powdery white or light gray or light yellow powdery crystals, and the national standard (GB / T4553) stipulates that its moisture content<1.4% (% on a dry basis) is Excellent product. Even if the finished product that can be achieved by dehydrating the above-mentioned products through drying and other processes is still about 1%, the moisture content is still about 1%. Due to its high moisture content, there is a problem of easy caking. When in use, it needs to be crushed or dissolved for a long time before it can be used, which brings great inconvenience to users. The production history of my country's industrial sodium nitrite products has been more than 50 years, and the finished products have always maintained the aforementioned properties, and the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/02C01B21/50C01D9/18
Inventor 康仕芳李建荣陈松刘太年赵珺宋光朴辛振林沈国宏
Owner TIANJIN UNIV
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