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Synthesis, transportation and storage of Sodium stearate

wallpapers News 2021-06-22
Synthesis, transportation and storage of Sodium stearate
Sodium stearate is a white fine powder or lumpy solid, with a smooth feeling, a fatty taste, and water absorption in the air. Slightly soluble in cold water, soluble in hot water or alcohol solution, the aqueous solution becomes alkaline due to hydrolysis.
Physical and chemical properties: Appearance is white powder, with fat odor, slippery, soluble in hot water and ethanol, and decomposes into stearic acid and corresponding sodium salt when exposed to acid
Synthesis
1.    Add stearic acid to the reaction kettle, heat to melt, add NaOH aqueous solution while stirring, heat at 65°C for 2 hours, and control the pH value at 8.0-8.5. Spray-dried product.
C17H35COOH+NaOH=C17H35COONa +H2O
2. Dissolve 10g stearic acid in 100mL 95% ethanol, titrate with 0.5mol/L sodium hydroxide ethanol solution, use phenolphthalein as indicator, after titrating to the equivalence point, extract the precipitated sodium stearate soap Filter out. The crude product can be recrystallized with 95% ethanol to obtain a pure product.
Store
Keep the fatty taste in a cool, dry and ventilated place. It is easily soluble in hot water or alcoholic water. It has water absorption in the air, and the solution becomes alkaline due to hydrolysis., Should be stored in a cool, dry, and ventilated place.
First aid
Inhalation: If inhaled, move the patient to fresh air.
Skin contact: Take off contaminated clothing and wash skin thoroughly with soap and water. Seek medical attention if you feel unwell.
Eye contact: Separate the eyelids and rinse with running water or normal saline. Seek medical attention immediately.
Ingestion: Rinse mouth and prohibit vomiting. Seek medical attention immediately.
Advice for protecting rescuers: Move the patient to a safe place. Consult a doctor. Show this chemical safety data sheet to the doctor on site.

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