Henkel Ag & Company, Kgaa

China Petroleum Chemical Corporation

Sinopec Engineering Incorporation

Henkel (China) Company Limited

Henkel (China) Investment Company Ltd.

China Petroleum & Chemical Corporation, Beijing Institute of Chemical Industry

Yonghua Zhao

Zhaobin Zhang

Lothar Thiele

Cong Zhou

Jingkun Liu

Yuping Guo

Xiou He

Changli Li

Hongxia Zhao

Hainü Shen

Qingwei Meng

Mujun Yuan

Nicole Knips

The invention relates to an ethylene cracking furnace having a multi-pass radiant coil, comprising at least one radiant section. In the radiant section there are provided with bottom burners and/or sidewall burners, and at least one set of multi-pass radiant coil longitudinally arranged in the radiant section. The multi-pass radiant coil is a four- to ten-pass type radiant coil. At least one tube of the multi-pass radiant coil is arranged to be spatially adjacent to a tube which is not consecutive to said at least one tube. With this arrangement, the thermal radiation influence between tubes with high temperature can be reduced, so that the tubes with low temperature can absorb the radiation heat from the tubes with high temperature. Therefore, the surface temperature of the tubes with high temperature can be reduced, thus extending the lifetime of the radiant coil and the operational cycle of the cracking furnace.

Ethylene cracking furnace with multi-pass radiant coil

A two-component polyurethane adhesive is provided, which comprises a component A comprising at least one polyol with a molecular weight of more than 500 g/mol, a component B comprising at least one polyisocyanate with a molecular weight of less than 1000 g/mol, and additional additives. The component A contains 0.1 to 10 wt. % sterically hindered amines having primary amino groups.

Two-component polyurethane adhesives with thixotropic effect

Growing community of inventors

Beijing, China

Yonghua Zhao