公开(公告)号：US20230202951A1

公开(公告)日：2023-06-29

申请号：US18115103

申请日：2023-02-28

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takashi USUI ,  Kazuhiro TAKAHASHI ,  Tomoyuki IWAMOTO

IPC: C07C17/389 ,  C07C21/18

CPC classification number: C07C17/389 ,  C07C21/18

Abstract: The present disclosure provides a method for purifying HFO-1132 to a high purity while suppressing the isomerization and loss of HFO-1132. Specifically, the present disclosure provides a method for purifying 1,2-difluoroethylene, which is HFO-1132, the method comprising, in this order, step 1 of bringing a composition comprising trans-1,2-difluoroethylene, which is HFO-1132(E), and water into contact with a zeolite having an average pore size of 2 to 4 Å to reduce the water content from the composition; and step 2 of recovering a purified product containing HFO-1132(E) and a reduced content of water, and containing less than 0.1% by volume of HFO-1132 (Z).

公开(公告)号：US20220348810A1

公开(公告)日：2022-11-03

申请号：US17865923

申请日：2022-07-15

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi ITANO ,  Hitomi KUROKI ,  Kazuhiro TAKAHASHI

IPC: C09K5/04

Abstract: The present invention provides a composition comprising a refrigerant (mixed refrigerant) having three types of performance, i.e., a coefficient of performance (COP) and refrigerating capacity (Cap) that are equivalent to or higher than those of R410A, and a sufficiently low GWP. Specifically, the present invention provides a composition comprising a refrigerant, the refrigerant comprising CF3I, CO2 (R744), and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)—HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).

公开(公告)号：US20220009861A1

公开(公告)日：2022-01-13

申请号：US17486202

申请日：2021-09-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kazuhiro TAKAHASHI

IPC: C07C21/18 ,  C09K5/04

Abstract: Provided are a novel azeotropic or azeotrope-like composition, and a separation method using the composition. An object is to provide a novel azeotropic or azeotrope-like composition, and a separation method using the composition. A solution to achieve the object is to provide an azeotropic or azeotrope-like composition containing trifluoroethylene and at least one compound selected from the group consisting of 1,1-difluoroethylene, fluoroethylene, and trifluoromethane.

公开(公告)号：US20210395173A1

公开(公告)日：2021-12-23

申请号：US17405440

申请日：2021-08-18

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takehiro CHAKI ,  Tsubasa NAKAUE ,  Megumi KUSHIDA ,  Kazuhiro TAKAHASHI

IPC: C07C17/20

Abstract: The present disclosure provides a method for producing HFC-143 at low cost and more efficiently than when using conventional methods. Specifically, the present disclosure provides a method for producing 1,1,2-trifluoroethane (HFC-143), comprising performing one or more fluorination reactions by bringing at least one chlorine-containing compound selected from the group consisting of 2-chloro-1,1-difluoroethane (HCFC-142) and 1-chloro-1,2-difluoroethane (HCFC-142a) into contact with hydrogen fluoride to obtain a reaction gas containing HFC-143, hydrogen chloride, and hydrogen fluoride.

公开(公告)号：US20210246348A1

公开(公告)日：2021-08-12

申请号：US17251514

申请日：2019-06-12

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi ITANO ,  Hitomi KUROKI ,  Kazuhiro TAKAHASHI

IPC: C09K5/04

Abstract: The present invention provides a composition comprising a refrigerant (mixed refrigerant) having three types of performance, i.e., a coefficient of performance (COP) and refrigerating capacity (Cap) that are equivalent to or higher than those of R410A, and a sufficiently low GWP. Specifically, the present invention provides a composition comprising a refrigerant, the refrigerant comprising CF3I, CO2 (R744), and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-RFC-1132], cis-1,2-difluoroethylene [(Z)-HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).

公开(公告)号：US20210246090A1

公开(公告)日：2021-08-12

申请号：US16973991

申请日：2019-06-13

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takashi USUI ,  Tsubasa NAKAUE ,  Yuzo KOMATSU ,  Kazuhiro TAKAHASHI ,  Takehiro CHAKI ,  Megumi KUSHIDA

IPC: C07C17/358 ,  C07C17/383 ,  B01J27/132 ,  B01J37/26 ,  C07C17/25 ,  C07C17/23

Abstract: The present invention aims to provide an efficient method for obtaining a desired isomer of HFO-1132 from a composition comprising trans-1,2-difluoroethylene (HFO-1132(E)) and cis-1,2-difluoroethylene (HFO-1132(Z)).
The present invention provides, as a means for solving the problem, a method for producing HFO-1132(E) and/or HFO-1132(Z), comprising steps (1) to (3): (1) supplying a composition comprising HFO-1132(E) and/or HFO-1132(Z) to a reactor filled with a catalyst to perform an isomerization reaction between the HFO-1132(E) and the HFO-1132(Z); (2) separating the reaction product obtained in step (1) into a first stream comprising the HFO-1132(E) as a main component, and a second stream comprising the HFO-1132(Z) as a main component; and (3) recycling the first stream or the second stream obtained in step (2) to the reactor, to subject the first stream or the second stream to the isomerization reaction.

公开(公告)号：US20210164698A1

公开(公告)日：2021-06-03

申请号：US16772953

申请日：2018-12-18

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Keisuke OHTSUKA ,  Mitsushi ITANO ,  Daisuke KARUBE ,  Yuuki YOTSUMOTO ,  Kazuhiro TAKAHASHI ,  Yuzo KOMATSU ,  Shun OHKUBO ,  Tatsuya TAKAKUWA ,  Tetsushi TSUDA

IPC: F25B1/04 ,  F24F11/88 ,  C09K5/04

Abstract: In an air conditioner that uses a refrigerant mixture containing at least 1,2-difluoroethylene, high efficiency is achieved. The motor rotation rate of a compressor (100) can be changed in accordance with an air conditioning load, and thus a high annual performance factor (APF) can be achieved. In addition, an electrolytic capacitor is not required on an output side of a rectifier circuit (21), and thus an increase in the size and cost of the circuit is suppressed.

公开(公告)号：US20200347283A1

公开(公告)日：2020-11-05

申请号：US16911816

申请日：2020-06-25

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi ITANO ,  Daisuke KARUBE ,  Yuuki YOTSUMOTO ,  Kazuhiro TAKAHASHI ,  Yuzo KOMATSU ,  Shun OHKUBO ,  Tatsuya TAKAKUWA ,  Tetsushi TSUDA ,  Takeo ABE ,  Yumi TODA

IPC: C09K5/04

Abstract: There are provided a refrigerating oil for refrigerant compositions in which good lubricity can be achieved when a refrigeration cycle is performed using a refrigerant having a sufficiently low GWP, a method for using the refrigerating oil, and use of the refrigerating oil. The refrigerating oil for a refrigerant composition contains a refrigerant containing trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).

公开(公告)号：US20200339856A1

公开(公告)日：2020-10-29

申请号：US16954651

申请日：2018-11-13

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi ITANO ,  Daisuke KARUBE ,  Yuuki YOTSUMOTO ,  Kazuhiro TAKAHASHI ,  Yuzo KOMATSU ,  Shun OHKUBO ,  Tatsuya TAKAKUWA ,  Tetsushi TSUDA ,  Takeo ABE ,  Yumi TODA

IPC: C09K5/04

Abstract: There are provided a refrigerating oil for refrigerant compositions in which good lubricity can be achieved when a refrigeration cycle is performed using a refrigerant having a sufficiently low GWP, a method for using the refrigerating oil, and use of the refrigerating oil. The refrigerating oil for a refrigerant composition contains a refrigerant containing trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).

公开(公告)号：US20200333051A1

公开(公告)日：2020-10-22

申请号：US16954973

申请日：2018-12-10

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Eiji KUMAKURA ,  Takuro YAMADA ,  Atsushi YOSHIMI ,  Ikuhiro IWATA ,  Mitsushi ITANO ,  Daisuke KARUBE ,  Yuuki YOTSUMOTO ,  Kazuhiro TAKAHASHI ,  Tatsuya TAKAKUWA ,  Yuzo KOMATSU ,  Shun OHKUBO

IPC: F25B13/00 ,  C09K5/04

Abstract: A refrigeration cycle is a refrigeration cycle using a mixed refrigerant which is a flammable refrigerant and which contains at least 1,2-difluoroethylene (HFO-1132(E)), and includes a compressor (1), a heat-source-side heat exchanger (3), an expansion mechanism (4), a use-side heat exchanger (2), and a decompression mechanism (7). The decompression mechanism (7) decompresses, between an inlet and an outlet of the heat-source-side heat exchanger (3), the mixed refrigerant flowing through the heat-source-side heat exchanger (3) that functions as an evaporator.