Lg Chem, Ltd

Korea Advanced Institute of Science and Technology

Korea University Research and Business Foundation

Seongmin Kim

Dong Hyun Ko

Sang Jin Han

Kyong Yong Cha

Jun Kyu Han

Ye Seul Hwang

Jun Han Kang

Sunhwan Hwang

Myungji Suh

Hyunseok Nam

Hyun Kil Nam

Myung Ji Suh

Dae Heung Choi

Kwan-Young Lee

Joo Hyuck Lee

Sun Hwan Hwang

Kyung Moo Lee

Joohyuck Lee

Daeheung Choi

Dongsu Han

Myung-gi Seo

Juhyeng Han

Ha Eun Jeong

Jaewon Jeong

Hyun Seok Nam

A method for preparing a metal complex catalyst by (A) obtaining a precipitate by bringing a metal precursor solution comprising a zinc (Zn) precursor, a ferrite (Fe) precursor, and water into contact with a basic aqueous solution; (B) obtaining a zinc ferrite catalyst by filtering and calcining the precipitate; and (C) supporting an acid onto the zinc ferrite catalyst, and a metal complex catalyst prepared thereby.

Method for producing metal complex catalyst, and metal complex catalyst produced by same

The present disclosure in some embodiments provides a security system using both key management service (KMS) and a hardware security module (HSM), and a method of operating the security system. At least one embodiment provides a security system including an HSM, a bootstrapping enclave, and one or more KMS enclaves. The HSM is configured to generate, replace or remove a root key, the HSM being physically independent. The bootstrapping enclave is configured to receive the root key from the HSM. The one or more KMSs are configured to perform an attestation procedure with the bootstrapping enclave, to receive the root key from the bootstrapping enclave, and to utilize the root key for establishing a secure channel with the HSM.

Security system and method thereof using both KMS and HSM

The present specification provides a method for preparing 1,3-butadiene, the method comprising: (A) obtaining a first product comprising a light component, 1,3-butadiene, and a heavy component from a reactant comprising butene; (B) separating the heavy component from a second product comprising the 1,3-butadiene and the light component by condensing the heavy component after heat exchanging the first product; and (C) separating concentrated heavy component by reboiling the condensed heavy component.

Method for preparing 1,3-butadiene

Provided is a method for producing a zinc ferrite catalyst, the method comprising: preparing a zinc precursor solution; preparing a ferrite precursor solution; obtaining a first precipitate by bringing the zinc precursor solution into contact with an alkaline solution; obtaining a second precipitate by adding the ferrite precursor solution to the first precipitate; and drying and firing the second precipitate after filtering the second precipitate.

Method for manufacturing zinc ferrite catalyst and zinc ferrite catalyst manufactured thereby

Disclosed are a catalyst for oxidative dehydrogenation and a method of preparing the same. More particularly, a catalyst for oxidative dehydrogenation of butene having a high butene conversion rate and superior side reaction inhibition effect and thus having high reactivity and high selectivity for a product by preparing metal oxide nanoparticles and then fixing the prepared metal oxide nanoparticles to a support, and a method of preparing the same are provided.

Catalyst for oxidative dehydrogenation and method of preparing the same

This invention relates to core-shell nanoparticles having acid sites, a method of manufacturing the same, and a method of directly producing hydrogen peroxide using the same.

Core-shell nanoparticle, method for manufacturing same and method for producing hydrogen peroxide using same

Provided is a catalyst system for oxidative dehydrogenation, a reactor for oxidative dehydrogenation including the catalyst system, and a method of performing oxidative dehydrogenation using the reactor. In the catalyst system, a fixed-bed reactor is filled with a catalyst for oxidative dehydrogenation in an n-stage structure (n being an integer of 2 or more), wherein each stage of the n-stage structure satisfies Equations 1 and 2 as claimed so that the concentration of an active ingredient included in the catalyst gradually increases in the direction in which reactants are fed into the reactor. Heat generated inside the reactor may be effectively controlled during oxidative dehydrogenation, thereby improving conversion rate, selectivity, and yield. In addition, catalyst deterioration may be reduced, thereby improving long-term stability of the catalyst.

Catalyst system for oxidative dehydrogenation, reactor for oxidative dehydrogenation including catalyst system, and method of performing oxidative dehydrogenation using reactor

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Daejeon, South Korea

Seongmin Kim