Gradient Noble Metal Hydrogenation Catalyst for Lubricant Base Oil
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Solution Overview
Problem
Current hydrogenation catalysts for lubricant base oil production face challenges such as insufficient hydrogenation isomerization performance, poor aromatic ring-opening capability, and low yield due to uniform distribution of noble metals, leading to high manufacturing costs and inefficient active center utilization.
Innovation Solution
A method for preparing a noble metal hydrogenation catalyst with a concentration gradient distribution of noble metals within the catalyst particle, using a molecular sieve or amorphous porous material carrier and impregnation solutions of Pt, Pd, Ru, and Re, where the noble metal concentration increases from the center to the surface, optimizing catalyst activity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform distribution of noble metals is used in catalyst, then ease of manufacture is improved, but hydrogenation activity and active center utilization deteriorate
Solution Approach 1:
The patent applies local quality by creating a concentration gradient of noble metals within the catalyst particle, where the metal concentration increases from the center to the surface. This non-uniform distribution optimizes active center utilization and enhances hydrogenation activity, particularly for aromatic ring-opening reactions, while maintaining manufacturing feasibility through a modified impregnation process
2Productivity
If noble metal content is increased to improve catalyst activity, then hydrogenation activity is improved, but manufacturing cost deteriorates
Solution Approach 1:
The patent changes the concentration parameter of noble metals from uniform to gradient distribution, with the concentration increasing from the center to the surface of catalyst particles. This parameter optimization improves catalyst activity and aromatic ring-opening capability while reducing overall noble metal loading, thereby lowering manufacturing costs
3Ease of manufacture
If conventional impregnation method is used, then ease of manufacture is improved, but aromatic ring-opening capability and hydrogenation isomerization performance deteriorate
Solution Approach 1:
The patent modifies the conventional impregnation method by controlling the distribution of noble metals to increase in concentration from the center to the surface of catalyst particles. This creates optimal local environments for different catalytic functions, significantly improving aromatic ring-opening capability and hydrogenation isomerization performance while maintaining ease of manufacture
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 enhanced hydrogenation activity, hydroisomerization performance, and aromatics saturation, producing lubricant base oil with high viscosity index and yield while reducing noble metal loading and manufacturing costs.
Implementation Method 1
a carrier is impregnated with a solution of active component A, and then washed, dried, and calcinated; subsequently, it is impregnated with an impregnation solution of active component B
Implementation Method 2
hydrogenation technology lies in highly efficient hydrogenation catalysts
Implementation Method 3
the essence of hydrogenation technology lies in highly efficient hydrogenation catalysts to be developed
Implementation Method 4
dried and calcinated to provide a hydrogenation catalyst
Data Source
AI summary
Disclosed are a method for preparing a noble metal hydrogenation catalyst comprising preparing a carrier from a molecular sieve having a 10-member ring structure and/or an amorphous porous material; preparing a noble metal impregnation solution; and preparing noble metal impregnation solutions in a concentration gradient ranging from 0.05 to 5.0 wt % with deionized water, and sequentially impregnating the carrier with the impregnation solutions from low to high concentrations during the carrier impregnation process, or preparing a noble metal impregnation solution at a low concentration ranging from 0.05 to 0.5 wt % and impregnating the carrier by gradually increasing the concentration of the noble metal impregnation solution to 2.0 to 5.0 wt % in the impregnation process, followed by homogenization, drying, and calcination, as well as a noble metal hydrogenation catalyst, use thereof, and a method for preparing lubricant base oil.