Tianjin University

Feng Shi

Minhua Zhang

Yingzhe Yu

He Dong

Hao Gong

Haoxi Jiang

Fang Meng

The present disclosure relates to a bisphenol A preparation process and device thereof. Each stage of reaction system includes a cooler and reactors, each with four sections, the reactors are filled with bisphenol A synthetic resin catalysts before startup operation, and filling proportions of the catalysts are as follows: ⅓ of the catalysts for the first-section reactor, ⅔ for the second-section reactor, the full amount for the third-section reactor and the full amount for the fourth-section reactor. The three reactors operate in series connection through valves, the reactor with the deactivated catalyst is cut out and the reactor to be used is cut in to maintain the three reactors operating in series every time the system operates ⅓ of the service life of the catalyst, and the process can provide a larger air speed, which is beneficial to eliminating the influence of external diffusion, thereby obtaining higher product benefits.

Bisphenol a preparation process and device thereof

The present disclosure relates to a thermal coupling method for preparing ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system and an ethylene purification and propylene refrigeration cycle system; ethanol dehydration reaction products in the ethanol dehydration reaction system serve as a heat source for preheating, vaporization and superheating of a raw material of ethanol; tower bottoms of an evaporation tower in the quenching compression system serve as a heat source for preheating of a feed stream of the evaporation tower and heating of an overhead gas of a quenching tower; products of ethylene in the alkaline washing system serve as a cold source for cooling of crude ethylene.

Thermal coupling method for preparing ethylene by ethanol dehydration and device thereof

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Tianjin, China

Feng Shi