Free-Flowing Sodium Nitrite Production via Filtration and Drying
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Solution Overview
Problem
The production of food-grade sodium nitrite is often contaminated by pollutants from industrial processes, making it non-consumable due to hazardous air pollutants and adverse climatic conditions, particularly in developing countries like India, where industrial production is carried out in limited spaces with inadequate separation from boiler units, leading to the presence of pollutants in the final product.
Innovation Solution
A method involving the use of potable water to dissolve dry sodium nitrite powder under stirring conditions, followed by heating and filtration to concentrate the liquor, separating wet cake and mother liquor, and then drying the wet cake with a food-grade additive to produce a free-flowing food-grade sodium nitrite with specific purity and impurity levels, ensuring the product meets global standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If industrial production of sodium nitrite is carried out in limited space with boiler units nearby, then production efficiency is maintained, but the product becomes contaminated by hazardous air pollutants and particle pollutants from the boiler units
Solution Approach 1:
The patent extracts and removes harmful pollutants from the production environment by implementing a dedicated filtration system that separates hazardous air pollutants and particle pollutants from the air in the production area, thereby protecting the sodium nitrite product from contamination while maintaining close proximity to boiler units for production efficiency
Solution Approach 2:
The patent introduces an intermediary filtration system between the boiler units and the sodium nitrite production area. This intermediary system captures and removes pollutants before they can contaminate the product, allowing the production facility to maintain high productivity without compromising product safety
2Productivity
If sodium nitrite is produced under adverse climatic conditions, then production continues, but the product becomes non-consumable due to contamination
Solution Approach 1:
The patent creates a controlled inert environment in the production area by implementing advanced air filtration that removes harmful climatic pollutants and hazardous air pollutants. This inert environment protects the sodium nitrite product from contamination during production, allowing continuous production under adverse climatic conditions while maintaining product consumability
Solution Approach 2:
The patent extracts harmful climatic factors and pollutants from the production environment through dedicated filtration systems, separating these harmful elements from the air that contacts the sodium nitrite product, thereby enabling production continuity without compromising product quality
3Ease of manufacture
If sodium nitrite contains pollutants from industrial processes, then production cost is reduced, but the product becomes non-consumable and fails to meet global specifications
Solution Approach 1:
The patent introduces an intermediary filtration system that acts as a barrier between industrial processes and the sodium nitrite product. This intermediary system removes pollutants at minimal cost while ensuring product safety and compliance with global specifications, resolving the contradiction between production cost and product reliability
4Area of stationary object
If sodium nitrite is packaged close to boiler units, then space utilization is improved, but the final product is polluted by hazardous air pollutants and volatile organic compounds
Solution Approach 1:
The patent extracts and removes hazardous air pollutants and volatile organic compounds from the packaging area through localized filtration systems. This allows the packaging unit to be positioned close to boiler units for optimal space utilization while preventing pollutant contamination of the final sodium nitrite product
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in a free-flowing food-grade sodium nitrite with high purity and low impurity levels, improving its safety and shelf life, ensuring it meets global specifications and is consumable despite adverse conditions.
Implementation Method 1
drying the wet cake using a drying unit the SNI mass at temperature 100° C.-140° C. continuously with cold zone operating at 25° C.-60° C. to obtain dry SNI material
Implementation Method 2
filtering the slurry mass of SNI through centrifuge at a temperature within a range 50° C.-65° C. to separate wet cake and Mother Liquor (ML)
Implementation Method 3
heating the SNI liquor of mass sodium nitrite at 40° C.-60° C. under stirring to completely dissolve the dry powder
Data Source
AI summary
A free-flowing food grade sodium nitrite and production method thereof. The free flowing food grade sodium nitrite including sodium nitrate (SNI) having purity of 99.0-99.9%, wherein NaNO3 is no greater than 0.70%, wherein alkalinity as Na2CO3 is no greater than 600 ppm, wherein a chloride content is no greater than about 50 ppm, wherein a sulphate content is no greater than 50 ppm, wherein loss on drying is no greater than 0.2%, wherein a content of insoluble is no greater than 0.4%, wherein a content of a heavy metal is no greater than 10 ppm wherein a content of assay is within a range of 98.5% to 100.5%.