Method for synthesizing PODE (polyoxymethylene dimethyl ethers)
A technology of polyoxymethylene dimethyl ether and synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low product selectivity, etc. The effect of good rate and good technical effect
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[0031] [Example 1]
[0032] 1. Preparation of catalyst
[0033] After washing the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until the water flows out, soak it in 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of the sodium sulfonate polystyrene cation exchange resin 7320 Soaked in 4w% hydrochloric acid for 4 hours each time, and then washed with deionized water until the eluate is free of chloride ions. After drying at 60°C, a sulfonic acid type polystyrene cation exchange resin is obtained, with a total exchange capacity of 4.10 mmol / g. Take the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin and 300 ml of Cu(OH) containing 2 grams of Cu 2 The aqueous suspension is mixed, 1 drop of glacial acetic acid is added, mixed, and allowed to stand at room temperature for 24 hours, and dried in a vacuum drying oven to a constant weight to obtain a catalyst with a Cu content...
Example Embodiment
[0036] [Example 2]
[0037] 1. Preparation of catalyst
[0038] After washing the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until the water flows out, soak it in 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of the sodium sulfonate polystyrene cation exchange resin 7320 Soaked in 4w% hydrochloric acid for 4 hours each time, and then washed with deionized water until the eluate is free of chloride ions. After drying at 60°C, a sulfonic acid type polystyrene cation exchange resin is obtained, with a total exchange capacity of 4.10 mmol / g. Take the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, and add 300ml of Mn(OH) containing 2 grams of Mn under nitrogen protection 2 The aqueous suspension is mixed, 1 drop of glacial acetic acid is added, mixed, and allowed to stand at room temperature for 24 hours, and dried in a vacuum drying oven to a constant weight to obtai...
Example Embodiment
[0041] [Example 3]
[0042] 1. Preparation of catalyst
[0043] After washing the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until the water flows out, soak it in 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of the sodium sulfonate polystyrene cation exchange resin 7320 Soaked in 4w% hydrochloric acid for 4 hours each time, and then washed with deionized water until the eluate is free of chloride ions. After drying at 60°C, a sulfonic acid type polystyrene cation exchange resin is obtained, with a total exchange capacity of 4.10 mmol / g. Take the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, and add 300ml of Tc(OH) containing 2 grams of Tc under nitrogen protection 2 The aqueous suspension was mixed, 1 drop of glacial acetic acid was added, mixed, and allowed to stand at room temperature for 24 hours, and dried in a vacuum drying oven to a constant weight to obt...
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