Ningbo Wanhua Polyurethanes Co., Ltd.

Wanhua Chemical Group Co., Ltd.

Deqiang Ma

Bo Wang

Weiqi Hua

Jiansheng Ding

Peicheng Luo

Yonghua Shang

Yu Yao

Wangshun Qi

Shuang Hu

Qingle Hou

Dezhen Sun

Nan Zhao

Zhongping Sun

Song Tu

Jianfeng Li

Zuolong Liu

Hongbo Li

Tianjie Yu

Ge Zhang

Haiquan Xu

Wanhong Yang

Yongsheng Wang

Yong Wang

Xianbo Liu

Jingquan Hao

Yong Hua Shang

Bo Xin

Cheng Gong

Provided are an emulsifiable isocyanate composition and a preparation method therefor. The emulsifiable isocyanate composition comprises the following components: (a) a polymethylene polyphenyl polyisocyanate, (b) an emulsifier, (c) an adduct derived from a diisocyanate, and optionally (d) a terpene monomer. The emulsifiable isocyanate composition is used in artificial board adhesives, and has a smaller mold cumulative effect, an improved demoulding performance and an extended pot life.

Emulsifiable isocyanate composition and preparation method and use thereof

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

The present invention provides a flow duct type jet reactor and a process for preparing isocyanates using it. The flow duct type jet reactor situates flow ducts in inner feed pipe which form whirlpool and reinforce vortex, thereby amine steam rapidly admixes and reacts with phosgene, and the byproducts are reduced. In addition, the present process uses a jet-absorption apparatus which rapidly cools the high temperature gas discharged from the reactor to a temperature at which the product is thermally stable, and at the same time provides negative pressure for the reaction process of the system, and thus saving bulky vacuum system.

Jet reactor with flow ducts and process for preparing isocyanates using it

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

Deqiang Ma