公开(公告)号：US20240067583A1

公开(公告)日：2024-02-29

申请号：US18211391

申请日：2023-06-19

Applicant: TIANJIN UNIVERSITY

Inventor： Minhua ZHANG ,  Hao GONG ,  He DONG ,  Feng SHI ,  Fang MENG ,  Yingzhe YU ,  Haoxi JIANG

IPC: C07C1/24 ,  C07C7/04 ,  C09K5/04

CPC classification number: C07C1/24 ,  C07C7/04 ,  C09K5/042 ,  C07C7/12 ,  C09K2205/12

Abstract: 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.

公开(公告)号：US20250122138A1

公开(公告)日：2025-04-17

申请号：US18897986

申请日：2024-09-26

Applicant: TIANJIN UNIVERSITY

Inventor： Minhua ZHANG ,  Hao GONG ,  He DONG ,  Feng SHI ,  Zhongfeng GENG ,  Yingzhe YU ,  Haoxi JIANG

IPC: C07C37/68 ,  C07C37/00 ,  C07C37/82 ,  C07C37/84

Abstract: The present disclosure relates to a production process and device for synthesizing bisphenol A by a resin method, including a condensation reaction unit for performing a catalytic condensation reaction between phenol and acetone to generate bisphenol A, a first-stage adduct crystallization unit for mixing a concentrated solution with adduct crystals recycled after melting and then performing adduct crystallization, a liquid-phase dephenolization unit for melting an adduct to yield a bisphenol A product, a secondary adduct crystallization unit for recycling phenol and bisphenol A from a mother solution, a solvent recycling unit for recycling unreacted phenol and unreacted acetone, and discharging phenol-containing process water for sewage treatment, and a cracking and rearrangement unit for recycling the phenol from the mother solution, and convert bisphenol A, 2,4-bisphenol A and the like therein in the mother solution into the bisphenol A.

公开(公告)号：US20230405543A1

公开(公告)日：2023-12-21

申请号：US18207495

申请日：2023-06-08

Applicant: TIANJIN UNIVERSITY

Inventor： Minhua ZHANG ,  Hao GONG ,  He DONG ,  Feng SHI ,  Yingzhe YU

IPC: B01J19/00 ,  B01J19/24 ,  B01D53/26

CPC classification number: B01J19/0013 ,  B01J19/245 ,  B01D53/261 ,  B01J2219/00159 ,  B01J2219/0004 ,  B01D2253/116 ,  B01D2257/80 ,  B01D2256/24 ,  B01D2259/4009

Abstract: The present invention relates to a preparation system of 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, an ethylene purification system and a propylene refrigeration cycle system. Part of ethylene produced by the ethylene purification system are used as circulating ethylene in the molecular sieve drying system for desorption regeneration of molecular sieve drying towers. The molecular sieve drying system includes the steps: (1) feeding crude ethylene and water from the alkaline washing system into the molecular sieve drying system, and after removing the water therefrom, feeding the obtained crude ethylene into the ethylene purification system; and (2) feeding part of the products of ethylene, as the circulating ethylene, produced by the ethylene purification system into the molecular sieve drying system.