Patents Assigned to WISON ENGINEERING LTD.
  • Process for producing butadiene by oxidative dehydrogenation of butylene
    Patent number: 10526258
    Abstract: The present invention provides a process for producing butadiene by oxidative dehydrogenation of butylene, comprising: a reaction stage, wherein a multi-stage adiabatic fixed bed in series is used, wherein butylene, oxygen-comprising gas and water are reacted in the presence of a catalyst in each stage of the adiabatic fixed bed with the first stage of the adiabatic fixed bed being further separately fed a diluent, being nitrogen and/or carbon dioxide, and the molar ratio between this separately fed diluents and the oxygen of all the oxygen-comprising gases fed in the subsequent stage(s) of the adiabatic fixed bed being controlled, wherein the oxygen-comprising gas is air, oxygen-enriched air or oxygen, and at least one of all the oxygen-comprising gases fed in the subsequent stage(s) of the adiabatic fixed bed is oxygen-enriched air having a specific oxygen concentration or oxygen; and a post treatment stage, wherein the effluent from the last stage of the adiabatic fixed bed is treated to obtain a product b
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 7, 2020
    Assignee: WISON ENGINEERING LTD.
    Inventors: Wenshu Yang, Yongjun Wu, Yansheng Li
  • PROCESS FOR PRODUCING BUTADIENE BY OXIDATIVE DEHYDROGENATION OF BUTYLENE
    Publication number: 20180086679
    Abstract: The present invention provides a process for producing butadiene by oxidative dehydrogenation of butylene, comprising: a reaction stage, wherein a multi-stage adiabatic fixed bed in series is used, wherein butylene, oxygen-comprising gas and water are reacted in the presence of a catalyst in each stage of the adiabatic fixed bed with the first stage of the adiabatic fixed bed being further separately fed a diluent, being nitrogen and/or carbon dioxide, and the molar ratio between this separately fed diluents and the oxygen of all the oxygen-comprising gases fed in the subsequent stage(s) of the adiabatic fixed bed being controlled, wherein the oxygen-comprising gas is air, oxygen-enriched air or oxygen, and at least one of all the oxygen-comprising gases fed in the subsequent stage(s) of the adiabatic fixed bed is oxygen-enriched air having a specific oxygen concentration or oxygen; and a post treatment stage, wherein the effluent from the last stage of the adiabatic fixed bed is treated to obtain a product b
    Type: Application
    Filed: May 19, 2017
    Publication date: March 29, 2018
    Applicant: WISON ENGINEERING LTD.
    Inventors: Wenshu YANG, Yongjun WU, Yansheng LI