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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[0014] [Example 1]
[0015] Add 2 g of catalyst SO into a 300 ml tank reactor 4 2- / ZrO 2 / SBA-15 (of which solid super acid SO 4 2- / ZrO 2 The weight ratio with molecular sieve carrier SBA-15 is 20:80, SO 4 2- ZrO 2 The load of the carrier is 1% by weight), 100 ml of methanol and 100 g of paraformaldehyde are reacted at 130°C and 0.8 MPa autogenous pressure for 4 hours, and the sample is centrifuged and analyzed by gas chromatography. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methanol and paraformaldehyde, and its composition distribution is shown in Table 1.
[0016]
Example Embodiment
[0017] [Example 2]
[0018] Add 2 g of catalyst Cl in a 300 ml tank reactor - / Fe 2 O 3 / MCM-22 (in which solid super acid Cl - / Fe 2 O 3 The weight ratio to molecular sieve carrier MCM-22 is 20:80, Cl - Account for Fe 2 O 3 The load of the carrier is 2% by weight), 100 ml of methanol and 100 g of paraformaldehyde are reacted at 130°C and 0.6 MPa autogenous pressure for 4 hours. The sample is centrifuged and analyzed by gas chromatography. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methanol and paraformaldehyde, and its composition distribution is shown in Table 1.
[0019]
Example Embodiment
[0020] [Example 3]
[0021] Add 2 g of catalyst SO into a 300 ml tank reactor 4 2- / ZrO 2 / SBA-15 (of which solid super acid SO 4 2- / ZrO 2 The weight ratio with molecular sieve carrier SBA-15 is 70:30, SO 4 2- ZrO 2 The load of the carrier is 1% by weight), 100 ml methylal and 100 g paraformaldehyde are reacted at 130°C and 0.6 MPa autogenous pressure for 4 hours, and the sample is centrifuged and analyzed by gas chromatography. 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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