Ningbo Wanhua Polyurethanes Co., Ltd.

Peicheng Luo

Jiansheng Ding

Deqiang Ma

Weiqi Hua

Yonghua Shang

Yu Yao

Shuang Hu

Nan Zhao

Dezhen Sun

Qingle Hou

Hongbo Li

Yong Hua Shang

Jingquan Hao

Wanhong Yang

Haiquan Xu

Ge Zhang

Tianjie Yu

The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.

Hole jet reactor and a process for the preparation of an isocyanate using the reactor

A hole-jetting type mixer-reactor, comprises the following parts: a first feeding port, a second feeding port, an outer casing, an inner casing, jet holes and a mixing reaction zone. The inner casing is inside the outer casing, and the lower portion of the outer casing forms a buffer chamber with the inner casing. The first feeding port connects with the inner casing to constitute one flow channel, and the second feeding port connects with the buffer chamber to form the other flow channel. The jet holes are on the wall of the inner casing situated at lower portion of the buffer chamber. The mixing reaction zone is inside the inner casing below the jet holes. The cross section of the inner casing is rectangular or rectangle-like. The mixer-reactor can achieve a fast mixing of two reactant streams which reacts with instantaneous, complicated parallel or consecutive competing reactions. The time scale of the mixing process is several milliseconds.

Hole-jetting type mixer-reactor

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Yantai, China

Peicheng Luo