Hydroprocessing Catalyst Composite Metal Chelation
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Solution Overview
Problem
Conventional hydroprocessing catalysts require improved activity for enhanced desulfurization, denitrogenation, and deoxygenation reactions, particularly in hydrogenating animal and plant oils and hydrocarbon oils derived from petroleum or coal, where existing catalysts fall short in efficiency.
Innovation Solution
A hydroprocessing catalyst comprising hydrogenation metal components from VIB, VIIB, and VIII groups, supported by a carrier with organic or organometallic compounds such as methyl acetoacetate, ethyl acetoacetate, or their derivatives, which enhance catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydroprocessing catalysts are used, then the catalyst structure is simple and easy to manufacture, but the catalytic activity is insufficient for desulfurization, denitrogenation, and deoxygenation reactions
Solution Approach 1:
The patent uses composite materials by combining VIB group metals (Mo, W) with VIII group metals (Co, Ni) to form CoMo, NiMo, CoW, or NiW combinations. These composite metal systems create synergistic effects that significantly enhance catalytic activity for hydroprocessing reactions including desulfurization, denitrogenation, and deoxygenation, while maintaining a manageable catalyst structure through systematic composition design.
Solution Approach 2:
The patent optimizes catalyst parameters by controlling the weight ratios of metal components (e.g., Co:Mo = 1:4 to 1:1, Ni:W = 1:3 to 1:1) and adjusting the amount of chelating agents (0.1-10 wt% based on total metal content). These parameter changes maximize the formation of high-activity active sites while maintaining catalyst stability and selectivity for specific hydroprocessing reactions.
2Productivity
If chelating agents are added to accelerate active site formation, then catalytic activity is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent employs chelating agents (EDTA, NTA, cyDTA, or ethylene glycol) as intermediary substances that facilitate the formation of high-activity active sites during catalyst preparation. These chelating agents temporarily complex with metal ions during impregnation and calcination, controlling the precipitation and distribution of metal sulfides to create highly dispersed and active catalytic sites, thereby accelerating active site formation while maintaining manageable manufacturing complexity.
3Productivity
If the catalyst is optimized for desulfurization reactions, then sulfur removal efficiency is improved, but activity for deoxygenation and denitrogenation reactions may be insufficient
Solution Approach 1:
The patent designs universal catalysts with multi-functionality by selecting metal combinations (CoMo, NiMo, CoW, NiW) that exhibit broad catalytic activity across multiple hydroprocessing reactions. These catalysts simultaneously promote desulfurization, denitrogenation, and deoxygenation reactions, as well as hydrogenation of aromatic compounds and olefins, allowing a single catalyst formulation to handle diverse feedstock types and reaction requirements without sacrificing performance in any specific reaction pathway.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst exhibits higher activity in hydroprocessing reactions, including desulfurization, denitrogenation, and deoxygenation, effectively hydrogenating animal and plant oils and hydrocarbon fractions, outperforming conventional catalysts.
Implementation Method 1
a catalyst including a carrier supported with at least one selected from among VIB group metal elements in the periodic table, such as molybdenum, tungsten and the like, VIII group metal elements in the periodic table, such as cobalt, nickel and the like, and combinations thereof has been used
Implementation Method 2
VIB group metals in the periodic table (for example, tungsten and molybdenum) and oxides and sulfides thereof are known to be active in catalyzing various kinds of reactions such as hydrogenation, dehydrogenation, oxidation, deoxygenation, desulfurization, denitrogenation, isomerization, cracking and the like
Implementation Method 3
it is known in the thesis (Catalysis Today 45 (1998) 271-276, Catalysis Today 130 (2008) 75-79, Journal of Catalysis 229 (2005) 424-438) that chelating compounds [ethylene diaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), trans-1,2-cyclohexanediamine-N,N,N,N'-tetraacetic acid (cyDTA)] or ethylene glycol are generally used in order to accelerate the formation of active sites
Implementation Method 4
desulfurization and denitrogenation reactions of hydrocarbon oil derived from petroleum fractions or coal
Implementation Method 5
desulfurization and denitrogenation reactions of hydrocarbon oil derived from petroleum fractions or coal
Implementation Method 6
these hydroprocessing catalysts are used to hydrogenate animal and plant oils as well as to treat hydrocarbon oils derived from petroleum or coal
Data Source
AI summary
The present invention relates to a hydroprocessing catalyst comprising: (i) one or more hydrogenation metal components selected from a group consisting of VIB group metal, VIIB group metal and VIII group metal; and (ii) an organic compound expressed by the following chemical formula 1 or an organometallic compound expressed by the following chemical formula 2. Chemical formula 1: R1COCH2COR2 (wherein, R1 and R2 are the same or different from each other, and are one or more groups selected from a group consisting of C1 to C12 alkyl, C6 to C12 allyl, C1 to C12 alkoxy and hydroxy). Chemical formula 2: X( R1COCH1COR2)n (wherein, X is selected from a group consisting of VIB group metal, VIIB group metal and VIII group metal, R1 and R2 are the same or different from each other, and are one or more groups selected from a group consisting of C1 to C12 alkyl, C6 to C12 allyl, C1 to C12 alkoxy and hydroxy, and n is an integer of 1 to 6).