Co-production preparation process of trans/cis-HFO-1234ze and HFO-1234yf

The invention relates to a co-production preparation process of trans-HFO-1234ze, cis-HFO-1234ze and HFO-1234yf. A raw material flow (1) of anhydrous HF and HCC-240db is introduced into a reactor which is provided with three reaction heating zones for respectively controlling the temperature, a first reaction product flow (2) is generated through three-step reaction, wherein an isomerization reaction is carried out in a third reaction heating zone under the action of an isomerization catalyst, trans-HFO-1234ze is converted into cis-HFO-1234ze, a catalyst carrier of the isomerization catalyst is aluminum oxide, and the aluminum oxide contains a mixed crystal phase of theta-Al2O3 and alpha-Al2O3; and then the output material (2) of the reactor is fed into a separation system for product separation. 本发明涉及一种反式-HFO-1234ze、顺式-HFO-1234ze和HFO-1234yf的联产制备工艺。无水HF和HCC-240db的原料物流(1)通入反应器中，所述反应器具有三个分别控制温度的反应加热区，经过三步反应生成第一反应产物流(2)，其中，在第三反应加热区，异构化催化剂作用下进行异构化反应，由反式-HFO-1234ze转化为顺式-HFO-1234ze，异构化催化剂的催化剂载体为氧化铝，包含θ-Al2O3和α-Al2O