Lg Chem, Ltd

Kyong Yong Cha

Dong Hyun Ko

Jun Kyu Han

Ye Seul Hwang

Myung Ji Suh

Dae Heung Choi

Sang Jin Han

Jun Han Kang

Hyun Kil Nam

Joo Hyuck Lee

Sun Hwan Hwang

Myungji Suh

Seong Min Kim

Sunhwan Hwang

Dae Chul Kim

Seongmin Kim

Joohyuck Lee

Daeheung Choi

Se Won Baek

Yoon Jae Min

Kyung Moo Lee

Hyun Seok Nam

Hyunseok Nam

Jaewon Jeong

Sung June Cho

The present specification relates to a method comprising: (A) mixing a ferrite-based catalyst molded article with diluent material particles; and (B) adding the mixture to a catalyst reactor, and a method for preparing butadiene using the same.

Catalyst loading method and method for preparation of butadiene by using same

A method for preparing a zinc ferrite-based catalyst comprising: obtaining a precipitate by bringing a metal precursor solution including a zinc precursor, a ferrite precursor, a solution containing an acid and water into contact with a basic aqueous solution; filtering the precipitate; drying the filtered precipitate; and firing the dried precipitate, wherein the solution containing the acid includes one or more of nitric acid (HNO) and hydrocarbon acid.

Method for preparing zinc ferrite-based catalyst and zinc ferrite-based catalyst prepared thereby

Provided is a catalyst for oxidative dehydrogenation, a method of preparing the catalyst, and a method of performing oxidative dehydrogenation using the catalyst. The catalyst for oxidative dehydrogenation has improved durability and fillability by including a porous support coated with a metal oxide (ABO) according to Equation 1:wt %+wt %=100 wt %,&#x2003;&#x2003;&#x3c;Equation 1&#x3e;

Catalyst for oxidative dehydrogenation, method of preparing catalyst, and method of performing oxidative dehydrogenation using catalyst

The method for preparing a ferrite-based coating catalyst including mixing a support, a ferrite-based catalyst, a cellulose-based additive, and water, in which a content of the cellulose-based additive is 0.5 wt % or less based on a total weight of the ferrite-based catalyst.

Method for producing ferrite-based coating catalyst and method for producing butadiene by using same

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

An exemplary embodiment of the present application provides a method for preparing butadiene, the method comprising a process of performing an oxidative dehydrogenation reaction by introducing a reactant comprising butene, oxygen, nitrogen, and steam into a reactor which is filled with a catalyst, in which during a first start-up of the oxidative dehydrogenation reaction, the oxygen is introduced into the reactor before the butene, or the oxygen is introduced into the reactor simultaneously with the butene.

Method for producing butadiene

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

A method of preparing a catalyst for oxidative dehydrogenation that includes coprecipitation and injecting inert gas or air at a specific time point to reduce the ratio of an inactive &#x3b1;-FeOcrystal structure, thereby improving the activity of the catalyst. Also provided is a method of performing oxidative dehydrogenation using the catalyst. When oxidative dehydrogenation of butene is performed using the catalyst, side reaction may be reduced, and selectivity for butadiene may be improved, providing butadiene with high productivity.

Method of preparing catalyst for oxidative dehydrogenation and method of performing oxidative dehydrogenation using catalyst

The method for preparing a ferrite-based coating catalyst including mixing a support, a ferrite-based catalyst, and water in a coating machine which is a rotating body, in which a weight ratio of the water based on a total weight of the support is 0.15 to 0.3.

Method for producing ferrite-based coated catalyst and method for producing butadiene by using same

The present invention relates to a catalyst for oxidative dehydrogenation and a method of preparing the same. More particularly, the present invention provides a catalyst for oxidative dehydrogenation having a porous structure which may easily control heat generation due to high-temperature and high-pressure reaction conditions and side reaction due to the porous structure and thus exhibits superior product selectivity, and a method of preparing the catalyst.

Catalyst for oxidative dehydrogenation and method of preparing the same

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.

Provided is a catalyst system for oxidative dehydrogenation, a reactor for preparing butadiene including the catalyst system, and a method of preparing 1,3-butadiene. In the catalyst system for oxidative dehydrogenation, a coating catalyst is diluted with a specific dilution filler and a reactor is filled with the diluted catalyst, or a reactor is filled with a catalyst for oxidative dehydrogenation so that the concentration of an active ingredient included in the catalyst gradually increases in the direction from reactants inlet in which reactants are fed into the reactor to products outlet. The catalyst system for oxidative dehydrogenation can efficiently control heat generated inside a reactor, thereby improving conversion rate, selectivity, yield, and long-term stability of a catalyst.

Catalyst system for oxidative dehydrogenation, reactor for preparing butadiene including catalyst system, and method of preparing 1,3-butadiene

The present invention relates to a method of preparing a catalyst for oxidative dehydrogenation. More particularly, the present invention provides a method of preparing a catalyst for oxidative dehydrogenation providing superior selectivity and yield for a conjugated diene according to oxidative dehydrogenation by constantly maintaining pH of a coprecipitation solution using a drip-type double precipitation method to adjust an &#x3b1;-iron oxide content in a catalyst in a predetermined range.

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Daejeon, South Korea

Kyong Yong Cha