| abstract |
A kind of continuation method preparing propylene oxide provides the liquid feed stream comprising propylene, hydrogen peroxide, acetonitrile, water, the potassium dihydrogen phosphate of dissolution and optionally propane it includes (i)；(ii) liquid feed stream provided in (i) is delivered in the epoxidation reactor comprising catalyst, the catalyst includes the titanium zeolite with structure type MWW, and liquid feed stream is subjected to epoxidation reaction condition；(iii) outflow stream is removed from epoxidation reactor；The concentration of the potassium dihydrogen phosphate wherein dissolved in liquid feed stream is at least the 10% of solubility limit of the potassium dihydrogen phosphate in liquid feed stream. |