The method for preparing polyoxymethylene dimethyl ether
A technology of dimethyl ether and polyoxymethylene, which is applied in chemical instruments and methods, preparation of organic compounds, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of high cost of trioxymethylene and low catalyst reaction efficiency and other problems, to achieve high reaction conversion rate and product yield, low production cost, and the effect of improving yield
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Embodiment 1
[0027] 1. Preparation of catalyst
[0028] (1) Polymerization and hybridization: at room temperature, add 144 grams of styrene, 16 grams of divinylbenzene, 1 gram of BPO and 40 grams of toluene to a 1000 ml three-necked flask and stir evenly, then add 40 grams of 500-mesh gallium oxide, and stir evenly , after adding 300 grams of 1.0w% PVA aqueous solution, then react at 70°C for 3h, 80°C for 1h, and 95°C for 45min under stirring to obtain a pellet-shaped product. Stop stirring and keep boiling the pellet at 95°C for 30min. All the products in the three-necked flask were poured into water for cleaning. The product was washed with ethanol and then washed with H 2 O was washed, placed in an oven and dried at 80° C. for 4 h to obtain 200 g of catalyst precursor I.
[0029] (2) Sulfonation: Add 200 grams of catalyst precursor I to 400 grams of 1,2-dichloroethane to swell at room temperature for 4 hours, then add 100 grams of H with a purity of 98w%. 2 SO 4 , stirring and downl...
Embodiment 2
[0036] 1. Preparation of catalyst
[0037] (1) Polymerization and hybridization: at room temperature, add 144 grams of styrene, 16 grams of divinylbenzene, 1 gram of BPO and 40 grams of toluene to a 1000 ml three-necked flask and stir evenly, then add 40 grams of cerium oxide of 500 mesh, and stir evenly , after adding 300 grams of 1.0w% PVA aqueous solution, then react at 70°C for 3h, 80°C for 1h, and 95°C for 45min under stirring to obtain a pellet-shaped product. Stop stirring and keep boiling the pellet at 95°C for 30min. All the products in the three-necked flask were poured into water for cleaning. The product was washed with ethanol and then washed with H 2 O was washed, placed in an oven and dried at 80° C. for 4 h to obtain 200 g of catalyst precursor I.
[0038] (2) Sulfonation: Add 200 grams of catalyst precursor I to 400 grams of 1,2-dichloroethane to swell at room temperature for 4 hours, then add 100 grams of H with a purity of 98w%. 2 SO 4 , stirring and dow...
Embodiment 3
[0043] 1. Preparation of catalyst
[0044] (1) Polymerization and hybridization: at room temperature, add 144 grams of styrene, 16 grams of divinylbenzene, 1 gram of BPO and 40 grams of toluene to a 1000 ml three-necked flask and stir evenly, then add 40 grams of 500-mesh germanium oxide, and stir evenly , after adding 300 grams of 1.0w% PVA aqueous solution, then react at 70°C for 3h, 80°C for 1h, and 95°C for 45min under stirring to obtain a pellet-shaped product. Stop stirring and keep boiling the pellet at 95°C for 30min. All the products in the three-necked flask were poured into water for cleaning. The product was washed with ethanol and then washed with H 2 O was washed, placed in an oven and dried at 80° C. for 4 h to obtain 200 g of catalyst precursor I.
[0045] (2) Sulfonation: Add 200 grams of catalyst precursor I to 400 grams of 1,2-dichloroethane to swell at room temperature for 4 hours, then add 100 grams of H with a purity of 98w%. 2 SO 4 , stirring and dow...
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