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High Purity Sodium Acetate Chemically Pure for The Production Of Acetate Fibers
Sodium acetate properties
1. Chemical properties
Chemical formula: CH₃COONa
Molecular weight: 82.03 g/mol (anhydrous matter); 136.08 g/mol (trihydrate)
Structure: Composed of the radical acetate ion (CH₃COO⁻) and sodium ion (Na +).
pH value: The aqueous solution is weakly alkaline, pH is about 8-9.
2. Physical properties
Appearance:
Anhydrous sodium acetate: white crystalline powder.
Sodium acetate trihydrate (CH₃COONa·3H₂O) : colorless transparent crystal.
Solubility:
Soluble in water, solubility increases significantly with temperature (at 20°C, about 46.5 g per 100 mL of water).
Slightly soluble in ethanol, insoluble.
Melting point:
Anhydrous sodium acetate: 324°C.
Sodium acetate trihydrate: 58°C (dehydration decomposition).
Density:
Anhydrous sodium acetate: 1.528 g/cm³.
Sodium acetate trihydrate: 1.45g /cm³.
Hygroscopic: Sodium acetate trihydrate is easy to hygroscopic, and anhydrous sodium acetate hygroscopic is low.
3. Thermal stability
Heated decomposition. When heated to high temperatures, sodium acetate decomposes to
form sodium carbonate (Na₂CO₃) and methane (CH₄)
How about sodium acetate for cellulose acetate
1. Production process of acetate fiber
Acetate is produced through the following main steps:
Cellulose pretreatment: purification and activation of natural cellulose, such as wood pulp or cotton lint.
Acetylation reaction: Cellulose and acetic anhydride under the action of a catalyst (such as sulfuric acid)
acetylation reaction to produce cellulose acetate.
Hydrolysis and precipitation: cellulose acetate is hydrolyzed and precipitated to form acetate fiber.
Spinning: The acetate fiber is dissolved in a solvent and the fiber is made by spinning process.
2. The role of sodium acetate in the production of acetate fiber
(1) pH regulator
Principle of action:
Sodium acetate aqueous solution is weakly alkaline and can be used to adjust the pH value of the reaction system.
In the acetylation reaction, sodium acetate can neutralize excess acid and stabilize reaction conditions.
Application scenario:
Acetylation reaction: Adjust the pH of the reaction system to improve the reaction efficiency.
Hydrolysis process: The pH value is adjusted during hydrolysis to promote the precipitation of cellulose.
(2) catalyst additives
Principle of action:
Sodium acetate can be used as catalyst assistant to enhance the activity of catalyst.
Application scenario:
Acetylation reaction: Used in combination with sulfuric acid and other catalysts to
improve the efficiency of acetylation reaction.
(3) stabilizer
Principle of action:
Sodium acetate can stabilize the reaction system and prevent side reactions.
Application scenario:
Acetylation: reduce side reactions, improve the purity and quality of acetate fiber.
3. Advantages of sodium acetate
Adjust the pH value: can effectively adjust the pH value of the reaction system, improve the reaction efficiency.
Enhance catalyst activity: as a catalyst additive, enhance the activity of the catalyst.
Stable reaction system: reduce side reactions and improve product quality.
4. Use precautions
Dosage control:
According to the pH value and process requirements of the reaction system, the amount of
sodium acetate should be controlled reasonably to avoid excessive use.
Safety protection:
Sodium acetate is less toxic to humans, but it is still necessary to wear protective gear
and avoid direct contact with skin and eyes.
Environmental impact:
Sodium acetate is environmentally friendly, but it still needs to be used rationally to avoid excessive emissions.
FAQ
1.What is your payment term?
We can accept T/T and L/C at sight as payment term.
2.Are you able to deliver on time?
Of course! we specialised in this line for many years,
many customer make a deal with me because we can deliver the goods on time and keep the goods top quality!
3.Do you provide free sample?
Yes, we can provide free sample . You only need to take the express fee.
4.How about the price?Can you make it cheaper?
We always take the customer’s benefit as the top priority.
Price is negotiable under different conditions, we are assuring you to get the most competitive price.
5.Can I visit your company and factory in China?
Sure. You are very welcomed to visit our company in Weifang, China.
(We will have someone responsible for picking up and dropping off at Weifang Airport)
6.What if there is a quality problem?
We have a professional and perfect after-sales service team, timely for you to deal with all problems.