公开(公告)号：US20140303398A1

公开(公告)日：2014-10-09

申请号：US14356604

申请日：2012-11-06

Applicant: Yingjin YUAN ,  Tianjin University

Inventor： Minhua Zhang ,  Xiuqin Dong ,  Minli Tao ,  Cheng Liu ,  Shengli Ouyang ,  Haoxi Jiang ,  Jing Ma ,  Guiming Li

IPC: C07C67/05

CPC classification number: C07C67/05 ,  C07C69/15

Abstract: The present invention discloses a method for producing vinyl acetate. Inert gas is introduced into cycling gas to improve the explosion limit of oxygen, enlarge a stable area of a reaction system and improve the oxygen concentration of the reaction system, thus reducing the reaction temperature, prolonging the service life of a catalyst, and improving the selectivity of the vinyl acetate. The inert gas is nitrogen or a mixture of nitrogen and methane. The concentration of the inert gas at the inlet of a reactor is 8 to 30 mol %. The molar concentration of the oxygen at the inlet of the reactor is 10.5 to 12 mol %.

Abstract translation: 本发明公开了一种乙酸乙烯酯的制造方法。 将惰性气体引入循环气体中以提高氧气的爆炸极限，扩大反应体系的稳定面积，提高反应体系的氧浓度，从而降低反应温度，延长催化剂的使用寿命， 乙酸乙烯酯的选择性。 惰性气体是氮气或氮气和甲烷的混合物。 反应器入口处惰性气体的浓度为8〜30摩尔％。 反应器入口处的氧摩尔浓度为10.5〜12摩尔％。

公开(公告)号：US12071387B2

公开(公告)日：2024-08-27

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 ,  C07C7/12 ,  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.