Prepn of isobutene oxysulfide
A technology for sulfurizing isobutylene and oxidants, which is applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of strong corrosion, decreased solubility, and poor solubility of metals, and achieve reduced oxidation depth and good extreme pressure Anti-wear and low corrosion effects
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example 1
[0014] This example is to use hydrogen peroxide as an oxidizing agent to prepare oxidatively sulfurized isobutylene in a neutral medium.
[0015] Dissolve 120 g of sulfurized isobutylene (commercial product) in 150 ml of toluene solution. The above solution was added into a 500ml three-neck flask, and stirred at a constant speed at room temperature. Then 100g concentration of 15% hydrogen peroxide solution was slowly added into the three-necked flask. The temperature was raised to 70°C and reacted for 2 hours. After the reaction, the reaction solution is cooled to room temperature, and the reaction solution will be divided into two incompatible phases: the upper layer is an organic phase containing the product, and the lower layer is an aqueous phase. Separate the aqueous phase with a separatory funnel and add 0.5 g of MnO to the remaining organic phase 2 To remove unreacted hydrogen peroxide. Then add 10ml concentration of 10% Na 2 CO 3 solution to remove traces of orga...
example 2
[0017] In this example, oxygen is used as an oxidizing agent, and in alkaline medium, Fe 2 o 3 As a catalyst for the preparation of oxidatively sulfurized isobutylene.
[0018] Dissolve 156 g of sulfurized isobutylene (industrial product) in 200 ml of toluene solution, add it into a 500 ml three-necked flask, and stir at a constant speed at room temperature. 5ml of 10% NaHCO 3 solution and 0.5 g powdered Fe 2 o 3 sequentially added to the above solution. Oxygen is introduced, and the flow rate of oxygen is 1.5L / min. The temperature was raised to 70°C and reacted for 2 hours. After the reaction, the reaction solution was cooled to room temperature, and Fe was filtered out. 2 o 3 , the reaction solution will be divided into two incompatible phases: the upper layer is the organic phase containing the product, and the lower layer is the aqueous phase. Then the remaining organic phase was washed with water until the reaction liquid was neutral. The product was treated wit...
example 3
[0023] This example is about the comparison of the extreme pressure properties of oxidatively sulfurized isobutylene.
[0024] 2g of sulfurized isobutylene and the samples obtained in examples and comparative examples were respectively dissolved in 100g of lubricating oil, and the extreme pressure performance of sulfurized isobutylene was evaluated by a four-ball machine test and a high-speed Timken abrasion tester. Evaluation items include (1) sintering load P D / Kg; (2) Load P when the wear spot diameter is 1mm D1 / Kg; (3) High-speed Timken OK value / N. The test results are shown in Table 1.
[0025] P D / Kg
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