Lg Chem, Ltd

Ye Seul Hwang

Dong Hyun Ko

Kyong Yong Cha

Jun Kyu Han

Dae Heung Choi

Myung Ji Suh

Sang Jin Han

Jun Han Kang

Hyun Kil Nam

Joo Hyuck Lee

Sun Hwan Hwang

Seong Min Kim

Sunhwan Hwang

Myungji Suh

Seongmin Kim

Daeheung Choi

Dae Chul Kim

Joohyuck Lee

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

Provided is a catalyst for an oxidative dehydrogenation reaction that comprises: a porous support; a core portion supported on the porous support and containing a first zinc ferrite-based catalyst; and a shell portion supported on the core portion and containing a second zinc ferrite-based catalyst, in which the first zinc ferrite-based catalyst and the second zinc ferrite-based catalyst are different from each other.

Catalyst for oxidative dehydrogenation reaction, and method for producing 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

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

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

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 of the present invention, wherein the metal oxide exhibits activity during oxidative dehydrogenation. Therefore, when the catalyst is used in oxidative dehydrogenation of butene, the conversion rate of butene and the selectivity and yield of butadiene may be greatly improved.

A ferrite catalyst for oxidative dehydrogenation and a method of preparing the same. The ferrite catalyst is prepared using an epoxide-based sol-gel method, wherein a step of burning includes a first burning step, in which burning is performed at a temperature of 70 to 200&#xb0; C.; and a second burning step, in which burning is performed after the temperature is raised from a temperature in the range of greater than 200&#xb0; C. to 250&#xb0; C. to a temperature in the range of 600 to 900&#xb0; C.

Ferrite catalyst for oxidative dehydrogenation, method of preparing ferrite catalyst, and method of preparing butadiene using ferrite catalyst

A method of preparing butadiene that includes supplying butene, oxygen, nitrogen, and steam into a reactor filled with a metal oxide catalyst, and performing an oxidative dehydrogenation reaction at a temperature of 300 to 450&#xb0; C. as a reaction step; after the reaction step, maintaining supplying the butene, oxygen, nitrogen, and steam within a range within which the flow rate change of the butene, oxygen, nitrogen, and steam is less than &#xb1;40%, or stopping supplying the butene, and cooling the reactor to a temperature range of 200&#xb0; C. or lower and higher than 70&#xb0; C. as a first cooling step; and after the first cooling step, stopping supplying the butene, oxygen, nitrogen, and steam or stopping at least supplying the butene, and cooling the reactor to a temperature of 70&#xb0; C. or lower as a second cooling step.

Butadiene preparation method providing excellent catalyst reproducibility

The present invention relates to a method of preparing a catalyst for oxidative dehydrogenation. More particularly, the method of preparing a catalyst for oxidative dehydrogenation includes a first step of preparing an aqueous iron-metal precursor solution by dissolving a trivalent cation iron (Fe) precursor and a divalent cation metal (A) precursor in distilled water; a second step of obtaining a slurry of an iron-metal oxide by reacting the aqueous iron-metal precursor solution with ammonia water in a coprecipitation bath to form an iron-metal oxide (step b) and then filtering the iron-metal oxide; and a third step of heating the iron-metal oxide slurry. In accordance with the present invention, a metal oxide catalyst, as a catalyst for oxidative dehydrogenation, having a high spinel phase structure proportion may be economically prepared by a simple process.

The present invention relates to a ferrite-based catalyst composite, a method of preparing the same, and a method of preparing butadiene using the same. More particularly, the present invention provides a ferrite-based catalyst composite having a shape that allows effective dispersion of excess heat generated in a butadiene production process and prevention of catalyst damage and side reaction occurrence by reducing direct exposure of a catalyst to heat, a method of preparing the ferrite-based catalyst composite, and a method of preparing butadiene capable of lowering the temperature of a hot spot and reducing generation of Cox by allowing active sites of a catalyst to have a broad temperature gradient (profile) during oxidative dehydrogenation using the ferrite-based catalyst composite, and thus, providing improved process efficiency.

Ferrite-based catalyst composite, method of preparing the same, and method of preparing butadiene using the 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 allowing oxidative dehydrogenation reactivity to be secured while increasing a first pass yield, and a method of preparing the catalyst.

The present disclosure relates to a method of preparing a zinc ferrite catalyst. More particularly, the present invention relates to a method of preparing a zinc ferrite catalyst comprising a) a step of dissolving a zinc precursor and an iron (III) precursor in water to prepare an aqueous metal precursor solution; b) a step of precipitating a solid catalyst precursor while vaporizing water in the aqueous metal precursor solution; and c) a step of firing the precipitated solid catalyst precursor to prepare a zinc ferrite catalyst. In accordance with the present disclosure, the method of preparing a zinc ferrite catalyst can be simply carried out without a pH adjustment step and can secure reproducibility.

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Daejeon, South Korea

Ye Seul Hwang