The generation method of polyoxymethylene dimethyl ether
A technology of dimethyl ether and polyoxymethylene, applied in the direction of chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problem of low product selectivity and achieve good yield and good technical effect Effect
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Embodiment 1
[0031] 1. Preparation of catalyst
[0032] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin that is equivalent to dry base resin 98 grams and 300ml contain Cu and be 2 grams of Cu(OH) 2 The aqueous suspensions were mixed, 1 drop of glacial acetic acid was added, mixed, left standing 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 of 2w%.
[0033] 2. Synt...
Embodiment 2
[0036] 1. Preparation of catalyst
[0037] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin that is equivalent to 98 grams of dry base resin, under nitrogen protection, be 2 grams of Mn(OH) containing Mn with 300ml 2 The aqueous suspensions were mixed, 1 drop of glacial acetic acid was added, mixed, left to stand at room temperature for 24 hours, and dried in a vacuum oven to constant weight to obtain a catalyst with a Mn content of ...
Embodiment 3
[0041] 1. Preparation of catalyst
[0042] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, under nitrogen protection, with 300ml of Tc containing Tc is 2 grams of Tc (OH) 2 Mix the aqueous suspensions, add 1 drop of glacial acetic acid, mix, let stand at room temperature for 24 hours, and dry to constant weight in a vacuum oven to prepare a catalyst with a Tc content of 2w%.
[0043] 2. Syn...
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