公开(公告)号：US20180088037A1

公开(公告)日：2018-03-29

申请号：US15711718

申请日：2017-09-21

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Jiaxu LIU ,  Qin XIN ,  Cuilan MIAO ,  Jilei WANG ,  Jie XU ,  Hong MIAO ,  Hongchen GUO

IPC: G01N21/35 ,  G01N21/01

CPC classification number: G01N21/35 ,  G01J3/00 ,  G01J3/42 ,  G01N21/01 ,  G01N21/3504

Abstract: A real-time double-beam in situ infrared spectrum system and a method thereof. The system comprises two identical infrared spectrometers and a double-beam infrared reactor cell, wherein the double-beam infrared reactor cell is formed by connecting a sample cell and a reference cell which are identical, the sample cell and the reference cell are at the same level and respectively correspond to a sample spectrometer and a reference spectrometer, the two infrared spectrometers are synchronously controlled by computers, to synchronously collect spectrograms of sample beams and background beams in real time, so as to obtain real information about a species on the catalyst surface changing with the reaction time, and eliminate gas molecule vibration spectrum interference in a real-time state and transmission spectrum interference generated under a heating condition. The present invention makes a characterization result become more accurate and reliable, so that real-time information about an active center of the catalyst surface, an active phase and an intermediate species at different temperatures may be obtained under a changeable gas phase component condition.

公开(公告)号：US20230415136A1

公开(公告)日：2023-12-28

申请号：US18461210

申请日：2023-09-05

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY ,  DALIAN QIYUAN TECHNOLOGY CO., LTD.

Inventor： Hongchen GUO ,  Cuilan MIAO ,  Quanren ZHU ,  Ning HE ,  Yanhui YI ,  Jiaxu LIU

IPC: B01J29/89 ,  B01J37/00 ,  B01J37/04 ,  B01J37/06 ,  B01J37/08 ,  B01J37/10

CPC classification number: B01J29/89 ,  B01J37/009 ,  B01J37/04 ,  B01J2229/18 ,  B01J37/082 ,  B01J37/10 ,  B01J37/06

Abstract: An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm−1 and below 980 cm−1.

公开(公告)号：US20220008903A1

公开(公告)日：2022-01-13

申请号：US17296182

申请日：2020-04-14

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY ,  DALIAN QIYUAN TECHNOLOGY CO., LTD.

Inventor： Hongchen GUO ,  Cuilan MIAO ,  Quanren ZHU ,  Ning HE ,  Yanhui YI ,  Jiaxu LIU

IPC: B01J29/89 ,  B01J37/10 ,  B01J37/08 ,  B01J37/04 ,  B01J37/06 ,  B01J37/00

Abstract: An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm−1 and below 980 cm−1.

公开(公告)号：US20240149255A1

公开(公告)日：2024-05-09

申请号：US18543520

申请日：2023-12-18

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY ,  DALIAN QIYUAN TECHNOLOGY CO., LTD.

Inventor： Hongchen GUO ,  Cuilan MIAO ,  Quanren ZHU

IPC: B01J29/89 ,  B01J37/00 ,  B01J37/04 ,  B01J37/06 ,  B01J37/08 ,  B01J37/10

CPC classification number: B01J29/89 ,  B01J37/009 ,  B01J37/04 ,  B01J37/06 ,  B01J37/082 ,  B01J37/10 ,  B01J2229/18

Abstract: An alkali metal ion modified titanium silicalite zeolite TS-1 for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes: 1: preparing an alkali metal hydroxide modification solution containing a small amount of TPA+ ions; 2: conducting a controlled hydrothermal treatment on a TS-1 zeolite matrix by using the alkali metal hydroxide solution containing a small amount of TPA+ ions; and 3: conducting post-treatment on the hydrothermally modified TS-1 zeolite. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; and alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite. The prepared alkali metal ion modified titanium silicalite zeolite has significantly improved catalytic performance in the gas phase epoxidation of propylene and hydrogen peroxide.

公开(公告)号：US20220009897A1

公开(公告)日：2022-01-13

申请号：US17296210

申请日：2020-04-14

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY ,  DALIAN QIYUAN TECHNOLOGY CO., LTD.

Inventor： Hongchen GUO ,  Quanren ZHU ,  Cuilan MIAO

IPC: C07D301/12 ,  B01J29/89 ,  B01J37/10 ,  B01J37/08 ,  B01J37/04 ,  B01J37/06 ,  B01J37/00 ,  B01J35/02 ,  B01J8/18

Abstract: A fluidized reaction method for synthesizing propylene oxide by gas phase epoxidation of propylene and hydrogen peroxide relates to a microspherical alkali metal ion modified titanium silicalite zeolite TS-1 catalyst applicable to the reaction method, and a preparation method thereof. A gas-solid phase fluidized epoxidation method refers to a gas phase epoxidation method in which the raw materials of propylene and hydrogen peroxide are directly mixed in the gas phase under normal pressure and temperature above 100° C. and the feed gas enables the titanium silicalite zeolite TS-1 catalyst to be fluidized in an epoxidation reactor. A catalyst applicable to the reaction method is a microspherical alkali metal ion modified titanium silicalite zeolite TS-1 catalyst which has the main characteristic that alkali metal cations are reserved on the titanium silicalite zeolite.

公开(公告)号：US20220008904A1

公开(公告)日：2022-01-13

申请号：US17296204

申请日：2020-04-14

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY ,  DALIAN QIYUAN TECHNOLOGY CO., LTD.

Inventor： Hongchen GUO ,  Cuilan MIAO ,  Quanren ZHU

IPC: B01J29/89 ,  B01J37/10 ,  B01J37/08 ,  B01J37/04 ,  B01J37/06 ,  B01J37/00

Abstract: An alkali metal ion modified titanium silicalite zeolite TS-1 for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes: 1: preparing an alkali metal hydroxide modification solution containing a small amount of TPA+ ions; 2: conducting a controlled hydrothermal treatment on a TS-1 zeolite matrix by using the alkali metal hydroxide solution containing a small amount of TPA+ ions; and 3: conducting post-treatment on the hydrothermally modified TS-1 zeolite. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; and alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite. The prepared alkali metal ion modified titanium silicalite zeolite has significantly improved catalytic performance in the gas phase epoxidation of propylene and hydrogen peroxide.