Method for improving properties of organic polysulfide
A polysulfide and organic technology, applied in the field of organic polysulfide, can solve the problems of reduced sulfur content, increased corrosion, and poor extreme pressure performance, so as to reduce toxic volatiles and pungent odor, and increase sulfur content Effect
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example 1
[0027] In this example, air is used as an oxidant, and sulfurized isobutylene is treated with a sulfonated cobalt phthalocyanine catalyst.
[0028] Prepare 200ml of sodium hydroxide solution with a mass fraction of 10% in a four-necked flask, add 0.004g of sulfonated cobalt phthalocyanine, and dissolve it in the sodium hydroxide solution. 100 g of sulfurized isobutylene (industrial product) was added into a four-necked flask, and air was introduced at a flow rate of 1.5 L / min. Raise the temperature to 40°C, stir at constant temperature, react for 2h, and cool to room temperature after the reaction, the reaction solution is divided into two immiscible layers: take the upper organic phase, add petroleum ether (distillation range is 60-90°C), The organic phase is washed with alkali (10% NaOH solution), washed with water until the reaction solution is neutral, and the product is washed with MgSO 4 After drying, the petroleum ether is distilled off under reduced pressure, and the ...
example 2
[0030] In this example, hydrogen peroxide is used as an oxidizing agent to treat isobutylene sulfide with a composite catalyst of sulfonated cobalt phthalocyanine and cobalt oxide.
[0031] Prepare 200ml of sodium hydroxide solution with a mass fraction of 10% in a four-neck flask, add 0.004g of sulfonated cobalt phthalocyanine and 0.002g of cobalt oxide, and dissolve them in the sodium hydroxide solution. Add 100g of sulfurized isobutylene (industrial product) into a four-neck flask, add 300g of 5% hydrogen peroxide solution, raise the temperature to 40°C, stir at a constant temperature, react for 2h, cool to room temperature after the reaction, and the reaction solution is divided into different Compatible two layers: take the upper organic phase, add 0.5g of MnO to the organic phase 2 To remove unreacted hydrogen peroxide, add petroleum ether (distillation range: 60-90°C) and wash the organic phase with alkali (10% NaOH solution) and water until the reaction solution is neu...
example 3
[0033] In this example, air is used as an oxidant, and sulfurized isobutylene is treated with a sulfonated cobalt phthalocyanine-cobalt oxide composite catalyst.
[0034] Prepare 200ml of sodium hydroxide solution with a mass fraction of 10% in a four-neck flask, add 0.005g of sulfonated cobalt phthalocyanine and 0.002g of cobalt oxide, and dissolve them in the sodium hydroxide solution. 100 g of sulfurized isobutylene (industrial product) was added into a four-necked flask, and air was introduced at a flow rate of 1.5 L / min. Raise the temperature to 40°C, stir at constant temperature, react for 2h, and cool to room temperature after the reaction, the reaction solution is divided into two immiscible layers: take the upper organic phase, add petroleum ether (distillation range is 60-90°C), The organic phase is washed with alkali (10% NaOH solution), washed with water until the reaction solution is neutral, and the product is washed with MgSO 4 After drying, the petroleum ether...
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