Method for synthesizing PODE (polyformaldehyde dimethyl ether)
A technology of polyoxymethylene dimethyl ether and paraformaldehyde, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as low utilization rate of raw materials, high amount of methylal, and poor selectivity of polymer products , to achieve the effect of increasing the yield and improving the utilization rate of raw materials
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Embodiment 1
[0014] Add 2 grams of catalyst ZSM-5, 50 milliliters of methanol, 32.4 milliliters of methylal and 100 grams of paraformaldehyde into a 300 milliliter tank reactor, fill with nitrogen to a pressure of 2 MPa, heat to 130 ° C and stir for 4 hours, filter and separate the catalyst And the reaction product, analyzed by gas chromatography, contains polyoxymethylene dimethyl ether and unreacted raw materials in the product, and its composition distribution is shown in Table 1.
Embodiment 2
[0016] Add 2 grams of catalyst MCM-56, 40 milliliters of methanol, 40 milliliters of methylal and 160 grams of paraformaldehyde into a 300 milliliter tank reactor, fill with nitrogen to a pressure of 2 MPa, heat to 130 ° C and stir for 4 hours, filter and separate the catalyst And the reaction product, analyzed by gas chromatography, contains polyoxymethylene dimethyl ether and unreacted raw materials in the product, and its composition distribution is shown in Table 1.
Embodiment 3
[0018] Add 2 grams of catalyst beta zeolite, 60 milliliters of methanol, 40 milliliters of methylal and 70 grams of paraformaldehyde in a 300 milliliter tank reactor, fill with nitrogen to a pressure of 2 MPa, heat to 130 ° C and stir for 4 hours, filter and separate the catalyst and The reaction product was analyzed by gas chromatography, and the product contained polyoxymethylene dimethyl ether and unreacted raw materials, and its composition distribution is shown in Table 1.
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