Use method and application performance of sodium dodecyl sulfate

Sodium dodecyl sulfate, other name foam powder, sodium lauryl alcohol, lauryl sodium sulfate salt, sodium lauryl sulfate, sodium lauryl sulfate, sodium dodecyl sulfate, lauryl sodium sulfate, is a kind of organic compounds, chemical formula for C12H25SO4Na, is white or light yellow powder, slightly soluble in alcohol, insoluble in chloroform, ether, soluble in water, Insensitive to alkali and hard water. With decontamination, emulsification and excellent foaming power, it is a kind of anionic surfactant microtoxic to human body, its biodegradation degree >90%.

Application performance

Excellent decontamination, emulsification and foaming force, can be used as detergent and textile auxiliaries, also used as anionic surface active agent, foaming agent, toothpaste mine fire extinguishing agent, fire extinguisher of foaming agent, emulsion polymerization emulsifier, medical medicinal emulsifying dispersant, shampoo and other makeup products, wool net lotion, silk wool detergent class quality fabric. Flotation agent for metal dressing

The dosage

Limit: dry protein 1000mg/kg; Frozen protein 125mg/kg; Liquid protein 125mg/kg; marshmallow foaming agent, 0.5% gelatin used; As surfactant, for solid drinks acidified by fumarate and fruit drinks acidified by fumarate, 25mg/kg; As a humidifier for oil, 10mg/kg(oil volume)

security

The toxicity LD50 was 1300mg/kg, non-toxic; It can irritate the mucosa and upper respiratory tract, the eyes and skin, and cause allergic reactions in the respiratory system

Production methods

(1) The sulfonation reaction of dodecyl alcohol and chlorosulfonic acid (molar ratio: 1.03) was carried out at 30 ~ 35°C, and the resulting sulfonate was neutralized with 30% sodium hydroxide to produce sodium dodecyl sulfate, which was bleached with hydrogen peroxide and spray dried to obtain the finished product

(2) Lauryl sulfate is formed from dodecyl alcohol and chlorosulfonic acid by sulfuric acid at 40 ~ 50°C, neutralized by sodium hydrooxidation, bleaching, sedimentation and spray drying

(3) The sulfur trioxide reaction device is a vertical reactor. Nitrogen is fed into the reactor through a vent below the 32 bar. The nitrogen flow rate was 85.9L/min. The liquid sulfur trioxide was injected into the flash evaporator at a flow rate of 58g/mino at 82.7 kpa. IkPaT was injected into the flash evaporator, the flash temperature was maintained at 100°C, and the flow rate of sulfur trioxide was controlled at 0.9072 kg/ho. Then the sulfurated products were rapidly cooled to 50°C and injected into the aging device. Let stand for 10 to 20 minutes. Finally, it is injected into the neutralization kettle and neutralized with alkali. 'The neutralization temperature is controlled at 50°C, and when the pH value is 7-8.5, the material is discharged, and the liquid product is obtained. Spray drying to a solid finished product

(4) By intermittent method, lauryl alcohol was put into the reaction kettle, preheated to 30°Co, and then 0.03mol chlorosulfonic acid was sprayed into the alcohol in mist form under high speed stirring. The reaction temperature was controlled at 30 ~ 35°C. After the sulfation reaction was finished, it was put into the neutralization kettle and neutralized with 30% lye to pH 7 ~ 8.5. Finally, 0. 4%(mass fraction) hydrogen peroxide was bleached and spray dried until solid

(5) The continuous reaction device is a tubular reactor. The lauryl alcohol was first saturated with hydrogen chloride. Then the hydrogen chloride solution of lauryl alcohol was passed into the reactor at 21.4 °C to react with chlorosulfonic acid. After gas-liquid separation of the reactants, the sulfated products flow from the bottom of the separator into the neutralizing kettle. The liquid product was neutralized with §0% sodium hydroxide at 50°C and the solid product was spray-dried