Pd-Co Catalyst for Diol Hydrogenation Cost Reduction
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Solution Overview
Problem
Current catalysts for hydrogenating dicarboxylic acids or their anhydrides, such as Re—Pd/SiO2, are expensive, and existing alternatives lack catalytic activity, necessitating the development of a more cost-effective and active catalyst for producing diols.
Innovation Solution
A catalyst is developed by supporting palladium or platinum, along with cobalt or molybdenum, on a carrier and subjecting it to a reduction treatment at elevated temperatures, enhancing catalytic activity for hydrogenating dicarboxylic acids or their anhydrides to produce diols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Re-Pd/SiO2 catalyst is used for hydrogenating dicarboxylic acid, then catalytic activity is achieved, but catalyst cost becomes high
Solution Approach 1:
The patent replaces expensive rhenium-containing catalysts with cheaper alternative catalysts comprising palladium or platinum supported on carriers such as silica, alumina, or activated carbon. The invention uses economically viable metal combinations (Pd-Co, Pd-Mo, Pt-Co, Pt-Mo) that provide sufficient catalytic activity without requiring costly rhenium, thereby reducing catalyst cost while maintaining reliability for hydrogenating dicarboxylic acid to diol
Solution Approach 2:
The patent optimizes catalyst preparation parameters including reduction temperature (373-673 K), metal loading ratios (M2/M1 = 0.1-10), and carrier selection to enhance the activity of the cheaper Pd-Co, Pd-Mo, Pt-Co, or Pt-Mo catalyst systems. By adjusting these parameters, the invention achieves catalytic performance comparable to Re-Pd/SiO2 while using more economical metal combinations
2Quantity of substance
If alternative catalysts without rhenium are used to reduce cost, then catalyst cost decreases, but catalytic activity becomes insufficient
Solution Approach 1:
The patent employs composite catalyst systems combining palladium or platinum with cobalt or molybdenum supported on carriers (silica, alumina, activated carbon). This composite approach creates synergistic effects where the noble metal (Pd or Pt) provides hydrogenation activity while the second metal (Co or Mo) enhances catalytic performance, achieving high activity without requiring expensive rhenium. The composite structure allows cost reduction while maintaining or improving catalytic activity
Solution Approach 2:
The patent systematically varies preparation parameters including reduction temperature (373-673 K), metal loading amounts (0.1-10 wt%), and metal ratio (M2/M1 = 0.1-10) to optimize the performance of Pd-Co, Pd-Mo, Pt-Co, or Pt-Mo catalysts. By controlling these parameters, the invention achieves catalytic activity sufficient for industrial diol production while using more economical metal combinations compared to traditional Re-Pd/SiO2 catalysts
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 novel catalyst effectively hydrogenates dicarboxylic acids, improving conversion rates and selectivity for diol production, particularly for 1,4-butanediol, while being more economical than traditional catalysts.
Implementation Method 1
subjecting the resulting carrier to a reduction treatment, at 400 K or higher
Implementation Method 2
hydrogenating at least one of dicarboxylic acid or its acid anhydride in the presence of the reduced carrier as a catalyst, thereby producing a diol
Data Source
AI summary
The invention relates to a novel catalyst for hydrogenation for hydrogenating at least one of dicarboxylic acid or its acid anhydride. The catalyst for hydrogenation according to a first embodiment is obtained by supporting at least one of palladium or platinum, and cobalt on a carrier, and subjecting the resulting carrier to a reduction treatment at 400 K or higher. The catalyst for hydrogenation according to a second embodiment is obtained by supporting at least one of palladium or platinum, and molybdenum on a carrier, and subjecting the resulting carrier to a reduction treatment at 500 K or higher.