Industry Overview
Sodium metabisulfite, also known as sodium pyrosulfite or sodium disulfite, is an inorganic compound with the chemical formula Na2S2O5. It is also referred to as disodium metabisulfite and is used as a disinfectant, antioxidant, reducing agent, and preservative. Sodium metabisulfite can be prepared by treating sodium hydroxide with sulfur dioxide. In warm water, sodium sulfite initially precipitates as a yellow solid; with additional sulfur dioxide, the solid dissolves to form sodium metabisulfite, which crystallises on cooling.
The manufacturing chemistry involves the reactions of sulfur dioxide with sodium hydroxide and sodium sulfite, yielding colourless solid sodium metabisulfite. The compound is sometimes regarded as a solid form of sulfur dioxide because it contains 67% SO2. Its principal applications include use as a reducing agent and as a preservative for various foodstuffs, where it provides a convenient solid alternative to sulfur dioxide.
The report also identifies potential applications of sulfur dioxide and sodium pyrosulfite in silage preservation, particularly in Western Canada. For grain silage such as oats and barley, sulfur dioxide can reduce fermentation and associated losses of potential food energy. For grass silage with low fermentable carbohydrate content, sulfur dioxide can provide a reliable preservation method where natural preservation may be difficult to achieve.
Cost Estimation
| Parameter | Value |
|---|---|
| Plant Capacity | 5 Ton/Day |
| Land & Building (1200 sq.mt.) | Rs. 3.44 Cr |
| Plant & Machinery | Rs. 83 Lac |
| Working Capital for 2 Months | Rs. 1.28 Cr |
| Total Capital Investment | Rs. 5.77 Cr |
| Rate of Return | 32% |
| Break Even Point | 51% |
Content Index
- INTRODUCTION
- USES & SAFETY OF SODIUM METABISULPHITE
- SAFETY
- B.I.S. SPECIFICATION
- PROPERTIES & CHARACTERISTICS OF SODIUM METABISULPHITE
- PROPERTIES:
- ANTIMICROBIAL AGENT
- PHYSICAL PROPERTIES
- SODIUM METABISULPHITE
- CHEMICAL PROPERTIES OF SODIUM METABISULPHITE
- GRADE AND ANALYSIS
- HEALTH & SAFETY FACTOR
- SHIPMENT & STORAGE OF SODIUM METABISULPHITE
- MARKET OVERVIEW OF SODIUM METABISULPHITE
- KEY TAKEAWAYS
- SODIUM METABISULFITE MARKET SEGMENT ANALYSIS - BY GRADE
- SODIUM METABISULFITE MARKET SEGMENT ANALYSIS - BY APPLICATION
- SODIUM METABISULFITE MARKET SEGMENT ANALYSIS - BY END USE
- SODIUM METABISULFITE MARKET SEGMENT ANALYSIS - BY GEOGRAPHY
- SODIUM METABISULFITE MARKET DRIVERS
- GROWING DEMAND FROM MINING INDUSTRIES AND STRICT
- GOVERNMENT REGULATION FOR WASTEWATER TREATMENT
- PRESENT MANUFACTURE OF SODIUM METABISULPHITE
- MANUFACTURING PROCESS OF SODIUM METABISULPHITE
- CHEMICAL REACTION
- MATERIAL BALANCE
- PROCESS FLOW DIAGRAM
- DERIVATION OF SODIUM METABISULPHITE
- MANUFACTURE FROM SODIUM BICARBONATE
- THE REACTION MAY BE WRITTEN IN TWO STEPS
- LABORATORY EXPERIMENTS
- SOLUTION METHOD
- EXPERIMENT 1 – PREPARATION IN SOLUTION
- THE MATERIAL BALANCE FOR THIS EXPERIMENT IS AS FOLLOWS:
- PREPARATION BY THE DAMP METHOD
- EXPERIMENT 2 – BICARBONATE CAKE AS RECEIVED ("WET")
- EXPERIMENT 3 – PARTIALLY DRIED BICARBONATE CAKE
- SAFETY SUMMERY OF SODIUM METABISULPHITE
- NAMES
- PRODUCT OVERVIEW
- MANUFACTURE OF PRODUCT
- PRODUCT DESCRIPTION
- EXPOSURE POTENTIAL
- WORKPLACE EXPOSURE:
- CONSUMER EXPOSURE TO PRODUCTS CONTAINING SODIUM METABISULFITE:
- ENVIRONMENTAL RELEASES:
- FIRES:
- HEALTH INFORMATION
- CONTACT:
- INHALATION:
- INGESTION:
- OTHER EFFECTS:
- ENVIRONMENTAL INFORMATION
- RAW MATERIAL CALCULATION
- ADDRESSES OF PLANT & MACHINERY SUPPLIERS
- SUPPLIERS OF CENTRIFUGE
- SUPPLIERS OF TRAY DRIER
- SUPPLIERS OF STORAGE TANK
- SUPPLIERS OF CRYSTALLIZER
- SUPPLIERS OF EVAPORATOR
- SUPPLIERS OF REACTOR
- SUPPLIERS OF JACKETTED
- ADDRESSES OF RAW MATERIALS SUPPLIERS
- SUPPLIERS OF SODIUM CARBONATE
- SUPPLIERS OF SULPHUR DIOXIDE
- ADDRESSES OF CONSULTANT FOR SODIUM META BISULPHITE
Appendix
- APPENDIX – A:
- 01. PLANT ECONOMICS
- 02. LAND & BUILDING
- 03. PLANT AND MACHINERY
- 04. OTHER FIXED ASSESTS
- 05. FIXED CAPITAL
- 06. RAW MATERIAL
- 07. SALARY AND WAGES
- 08. UTILITIES AND OVERHEADS
- 09. TOTAL WORKING CAPITAL
- 10. TOTAL CAPITAL INVESTMENT
- 11. COST OF PRODUCTION
- 12. TURN OVER/ANNUM
- 13. BREAK EVEN POINT
- 14. RESOURCES FOR FINANCE
- 15. INSTALMENT PAYABLE IN 5 YEARS
- 16. DEPRECIATION CHART FOR 5 YEARS
- 17. PROFIT ANALYSIS FOR 5 YEARS
- 18. PROJECTED BALANCE SHEET FOR (5 YEARS)
Frequently Asked Questions
Sodium metabisulfite is an inorganic compound with the chemical formula Na2S2O5. It is also known as sodium pyrosulfite, sodium disulfite, or disodium metabisulfite. The compound is used as a reducing agent, antioxidant, disinfectant, and preservative. It can serve as a convenient solid replacement for sulfur dioxide in applications where a solid source of SO2 is preferred.
Sodium metabisulfite can be manufactured by reacting sulfur dioxide with sodium hydroxide and subsequently with sodium sulfite. In the reported process, sodium sulfite first forms in warm water, while additional sulfur dioxide causes the solid to dissolve and form the disulfite. The sodium metabisulfite then crystallises upon cooling. The report also describes alternative preparation routes involving sodium bicarbonate, including solution and damp methods.
The main uses of sodium metabisulfite include preservation, reduction, disinfection, and antioxidant applications. It is used as a convenient solid replacement for sulfur dioxide in various applications, including food preservation. The report also identifies potential use in silage preservation, where sulfur dioxide can help control fermentation and support preservation of grain and grass silage under suitable conditions.
Sodium metabisulfite is sometimes considered a solid form of sulfur dioxide because it contains 67% SO2. This makes it useful where sulfur dioxide needs to be supplied in a more convenient solid form. In applications such as preservation, the compound can provide the functional benefits associated with sulfur dioxide while offering a practical alternative for handling, storage, and application.
The reported manufacturing route uses sulfur dioxide and sodium hydroxide to form sodium sulfite and subsequently sodium metabisulfite. The report also discusses manufacturing from sodium bicarbonate and includes dedicated sections for suppliers of sodium carbonate and sulfur dioxide. The specific raw-material requirement depends on the selected manufacturing route, process design, operating conditions, and product specifications.
The report identifies several equipment categories associated with sodium metabisulfite production, including centrifuges, tray driers, storage tanks, crystallizers, evaporators, reactors, and jacketed equipment. The appropriate equipment arrangement depends on the selected process and production requirements. Equipment selection should consider material compatibility, process conditions, crystallisation requirements, drying, storage, handling, and applicable safety requirements.
Sodium metabisulfite requires appropriate controls for handling, storage, exposure, and environmental release. The report specifically addresses workplace exposure, consumer exposure, environmental releases, fires, contact, inhalation, ingestion, and other health effects. Industrial facilities should use suitable engineering controls, personal protective equipment, safe storage practices, and established procedures based on the applicable safety data and operating conditions.
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