Polyformaldehyde dimethyl ether synthesis method
A technology of polyoxymethylene dimethyl ether and synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve the problems of difficult catalyst separation, low conversion rate of raw materials, poor product selectivity, etc., and achieves production cost. Low, high conversion rate of raw materials, good product yield
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Embodiment 1
[0015] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / ZrO 2 / SBA-15 (wherein the solid superacid SO 4 2- / ZrO 2 The weight ratio with molecular sieve carrier SBA-15 is 20:80, SO 4 2- accounted for ZrO 2 The load of the carrier is 1% by weight), 100 ml of methanol and 100 g of paraformaldehyde, reacted for 4 hours at 130 ° C and 0.8 MPa autogenous pressure, and the samples were extracted and analyzed by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw material methanol and paraformaldehyde, and its composition distribution is shown in Table 1.
[0016]
Embodiment 2
[0018] 2 g of catalyst Cl was added to a 300 ml tank reactor - / Fe 2 o 3 / MCM-22 (where the solid superacid Cl - / Fe 2 o 3 The weight ratio with molecular sieve carrier MCM-22 is 20:80, Cl - accounted for Fe 2 o 3 The load of the carrier is 2% by weight), 100 ml of methanol and 100 g of paraformaldehyde, reacted for 4 hours at 130 ° C and 0.6 MPa autogenous pressure, and the samples were extracted and analyzed by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw material methanol and paraformaldehyde, and its composition distribution is shown in Table 1.
[0019]
Embodiment 3
[0021] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / ZrO 2 / SBA-15 (wherein the solid superacid SO 4 2- / ZrO 2 The weight ratio to molecular sieve carrier SBA-15 is 70:30, SO 4 2- accounted for ZrO 2 The load of the carrier is 1% by weight), 100 ml of methylal and 100 g of paraformaldehyde, reacted for 4 hours at 130 ° C and 0.6 MPa autogenous pressure, and the samples were extracted and analyzed by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methylal and paraformaldehyde, and its composition distribution is shown in Table 1.
[0022]
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