Lg Chem, Ltd

Jun Seon Choi

Ji Yeon Kim

Joo Young Cheon

Wang Rae Joe

Kyung Soo Kim

KyungYeon Kang

Hye Jeong Ok

Sung Jin Kim

Jun Yeon Cho

Eung Seob Yeom

Sojin Kim

Ki Hyuk Kang

Won Kyun Lee

Jae Soon Choi

Sangjin Kim

Hong Seok Park

Young Seok Ryou

Jae Hyung Choi

Suji Kim

There is provided an ammoxidation catalyst for propylene having a structure in which molybdenum (Mo) oxide is supported first, and an oxide of heterogeneous metals including bismuth (Bi) is supported later. Related methods of making and using the catalyst are also provided.

Ammoxidation catalyst for propylene, manufacturing method of the same catalyst, ammoxidation method using the same catalyst

Provided is an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, according to one embodiment of the invention, there is provided a catalyst having a structure in which metal oxide is supported on a silica carrier, having narrow particle size distribution, and having excellent attrition loss. The catalyst may have a D50 particle diameter of 30 to 300 μm, and D10 particle diameter, D50 particle diameter and D90 particle diameter may satisfy the relationship (D90−D10)/D50<2.0. The catalyst may have a chemical formula MoBiFeCoKO, where a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, d is 0.01 to 2, and x is 24 to 48.

An ammoxidation catalyst includes a metal oxide represented by Chemical Formula 1 supported on a silica carrier, wherein the catalyst has pores having a diameter of 5 to 200 nm, a pore volume of 0.1 to 3.0 cm/g, and a BET surface area of 50 m2/g to 1,000 m2/g:MoBiFeABCO  Chemical Formula 1

An ammoxidation catalyst includes a metal oxide represented by Chemical Formula 1, wherein a first peak having intensity of A appears in the 2θ range of 26.3=0.5°, and a second peak having intensity of B appears in the 2θ range of 28.3±0.5° in X ray diffraction analysis by CuKα, and an intensity ratio (A/B) of the first peak to the second peak is 1.5 or more:MoBiFeABCDO  Chemical Formula 1

The present invention relates to a fluidized bed reactor. The fluidized bed reactor includes: a catalyst bed; a dust collector provided in an upper portion of the fluidized bed reactor collecting catalyst particles in a gas discharged toward the upper portion of the fluidized bed reactor; and a filter portion provided in a region between the dust collector and the catalyst bed, wherein the filter portion includes a filtering screen and a plurality of conical caps coupled to the filtering screen.

Fluidized bed reactor

The present invention relates to a method for purifying N-substituted maleimide. More specifically, the present invention, without performing a water washing process, enables to remove organic-acid-impurities which are difficult to remove through distillation because of having similar boiling points to the N-substituted maleimide compound by utilizing solubility of organic-acid-impurities in an organic solvent used in the preparing process of the maleimide compound, and thereby, without producing washing wastewater, ensuring removal efficiency of the organic-acid-impurities equal to or similar to an N-substituted maleimide compound subjected to a water washing process.

Method for purifying n-substituted maleimide

The present disclosure relates to a catalyst for dehydration of glycerin, a preparation method thereof, and a production method of acrolein using the catalyst. Particularly, the catalyst according to an embodiment of the present disclosure is used in a dehydration reaction of glycerin to exhibit high catalytic activity, a high yield, and high selectivity to acrolein and acrylic acid, and has a longer lifetime compared to the conventional catalysts due to a characteristic that coke carbon cannot be easily deposited on the surface of the catalyst.

Catalyst for dehydration of glycerin, preparation method thereof, and production method of acrolein using the catalyst

The present invention relates to a synthesis method of N-substituted maleimides using a non-homogeneous solid acid catalyst, and particularly, a synthesis method of N-substituted maleimides with high synthesis yield by using a zirconium(IV) hydrogen phosphate as a catalyst, by which, the loss of the catalyst is minimized, the separation and recovering processes of the catalyst are simplified, in case when the activity of the separated and recovered catalyst is decreased, the complete regeneration of the catalyst is possible via washing or firing, and solvents that could be used during a washing process of the catalyst are not limited.

Synthesis method of N-substituted maleimide using solid acid catalysts

A dehydration catalyst for preparing N-substituted maleimide, which may minimize formation of by-products, is reusable because its activity is not reduced significantly even after being reused several times, and may maintain its reaction activity for a long time, a preparation method thereof, and a method of preparing N-substituted maleimide, are provided.

Dehydration catalyst for preparing N-substituted maleimide, preparation method thereof, and method of preparing N-substituted maleimide

The present invention relates to a method for preparing acrylic acid from glycerin. More specifically, the present invention provides a method which can improve the selectivity of acrolein by applying a specific catalyst composition and process conditions to minimize the generation of coke carbon of the catalyst, and can prepare acrylic acid with higher productivity for a longer duration of time because a dehydration reaction can be performed for a longer working period while maintaining catalyst activity at a high level during the reaction.

Method for preparing acrylic acid from glycerin

The present invention relates to: a catalyst for glycerin dehydration; a preparation method therefor; and an acrolein preparation method using the catalyst. According to one embodiment of the present invention, the catalyst is used in glycerin dehydration so as to exhibit high catalytic activity, a high yield and high acrolein selectivity, and has a characteristic in which carbon is not readily deposited, thereby having a long lifetime compared with that of a conventional catalyst.

Catalyst for glycerin dehydration, preparation method therefor, and acrolein preparation method using catalyst

The present invention relates to a catalyst for glycerin dehydration, a preparation method thereof, and a preparation method of acrolein. The catalyst for glycerin dehydration exhibits a high glycerin conversion ratio, minimizes by-product formation to improve acrolein selectivity, and also maintains high catalytic activity during reaction.

Catalyst for glycerin dehydration, preparation method thereof, and preparation method of acrolein

The present invention relates to a catalyst for glycerin dehydration, a preparation method thereof, and a preparation method of acrolein, and more particularly, to a catalyst for glycerin dehydration which minimizes by-product formation during glycerin dehydration to improve acrolein selectivity and maintains high catalytic activity during reaction.

The present invention relates to a catalyst for glycerin dehydration, a preparation method thereof, and a preparation method of acrolein, and more particularly, to a catalyst for glycerin dehydration which minimizes by-product formation to improve acrolein selectivity and maintains high catalytic activity during reaction.

The present invention relates to a method for preparing a catalyst for glycerin dehydration, a catalyst for glycerin dehydration prepared thereby, and a method for preparing acrolein. More particularly, the catalyst for glycerin dehydration prepared by the preparation method is able to minimize by-product formation to improve acrolein selectivity and to maintain high catalytic activity during the reaction.

Growing community of inventors

Daejeon, South Korea

Jun Seon Choi