Environment friendly preparation process for producing propylene oxide through complexation extraction
A technology for the preparation of propylene oxide, which is applied in the direction of organic chemistry, can solve the problems of unrealized industrialization and a large amount of salty wastewater, and achieve the effects of easy industrial automation control, simple process and low investment
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[0037] Example 1:
[0038] An environmentally friendly preparation process for complexation extraction to produce propylene oxide, including the following steps:
[0039] (1) The monochloropropanol solution obtained by the traditional process, using complex extraction agent (n-dodecane: N 235 : N-octanol volume ratio 5:3:2) for extraction, the volume ratio is monochloropropanol solution: complex extractant=5:3, three-stage extraction, monochloropropanol extraction rate is 95%, HCl The extraction rate is 98%, and the HCl content in the solution after extraction is 0.083%;
[0040] (2) The remaining chlorohydrin mother liquor after extraction is returned to the chlorohydrin reaction system, and the chlorohydrin reaction is not affected;
[0041] (3) The complex extract containing HCl and monochloropropanol is saponified with 20% (wt%) lime milk (residual alkali content of the mother liquor discharged from the bottom of the tower is less than 0.5%); crude propylene oxide is produced, whi...
Example Embodiment
[0043] Example 2:
[0044] The N in Example 1 235 Changed to trioctylamine, the volume ratio of n-dodecane: trioctylamine: n-octanol is 1:3:2; monochloropropanol solution: complex extraction agent = 5:1. The operation steps are the same as those in Example 1. The result It is basically the same as in Example 1.
Example Embodiment
[0045] Example 3:
[0046] Change the n-dodecane in Example 1 to n-decane, the volume ratio of n-decane: tribenzylamine: n-octanol is 10:3:2; monochloropropanol solution: complex extraction agent = 1:1 The other operation steps are the same as in Example 1, and the results are basically the same as in Example 1.
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