Platinum-carbon catalyst and preparation and application thereof

A platinum-carbon catalyst and catalyst technology, which are applied in the directions of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. Control, high mechanical strength, high activity effect

Active Publication Date: 2021-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology provides an improved process for producing highly stable platinous particles that have excellent properties such as reducing hydrogen peroxide (H2O2) into lithium oxides or other compounds with strong chemical bonds. These tiny particles also help make certain types of fuel more efficient than traditional methods like burning them alone.

Problems solved by technology

This patents discusses how different ways have been proposed or developed during the production of high purity metallic materials like pentafluorophosphorus after being dissolved with water at specific stages of processing. One problem addressed is finding a more efficient way to separate uranylbdenum (U) without damaging other components found within these compounds while also improving their overall effectiveness on converting urania towards tantalum.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 96g of dried coconut shell activated carbon (20-40 mesh), add 61g of alkaline silica gel solution containing 5% silica mass concentration, soak overnight in equal volume, and then dry at 120°C for 24h to obtain silica-containing activated carbon carrier. Place the carrier in the pot of a medical sugar coating machine, spray 20 g of chloroplatinic acid solution containing 5% platinum metal mass concentration in a rotating state, put it into an oven after spraying, and keep it at 120° C. for 2 hours. Then transfer to a tube furnace, raise the temperature to 400°C at a rate of 5°C / min in a nitrogen atmosphere and keep it at this temperature for 3 hours, with a nitrogen flow rate of 40L / h; 36L / h, take off the furnace and drop to room temperature naturally, switch to nitrogen, and slowly pass through air for 10 minutes. Transfer the passivated catalyst to a beaker, add 300 ml of deionized water, and slowly add 19.4 g of a mass concentration of 10% sodium borohydride so...

Embodiment 2

[0017] Take 95g of dried coconut shell activated carbon (20-40 mesh), add 64g of alkaline silica gel solution containing 5% silica mass concentration, impregnate in equal volume overnight, and then dry at 120°C for 24h to obtain silica-containing activated carbon carrier. Place the carrier in the pot of a medical sugar coating machine, spray 40 g of chloroplatinic acid solution containing 5% platinum metal mass concentration in a rotating state, put it into an oven after spraying, and keep it at 120° C. for 2 hours. Then transfer to a tube furnace, raise the temperature to 300°C at a rate of 5°C / min in a nitrogen atmosphere and keep it at this temperature for 4 hours, with a nitrogen flow rate of 40L / h; change to hydrogen, heat and reduce at 300°C for 3 hours, and a hydrogen flow rate of 36L / h, take off the furnace and drop to room temperature naturally, switch to nitrogen, and pass through air slowly for 20min. Transfer the passivated catalyst to a beaker, add 300 ml of dei...

Embodiment 3

[0019] Take 94g of dried coconut shell activated carbon (20-40 mesh), add 61g of alkaline silica gel solution containing 5% silica mass concentration, impregnate in equal volume overnight, and then dry at 120°C for 24h to obtain silica-containing activated carbon carrier. Place the carrier in the pot of a medical sugar coating machine, spray 60 g of chloroplatinic acid solution containing 5% platinum metal mass concentration in a rotating state, put it into an oven after spraying, and keep it at 120° C. for 3 hours. Then transfer to a tube furnace, raise the temperature to 400°C at a rate of 5°C / min in a nitrogen atmosphere and keep it at this temperature for 4 hours, with a nitrogen flow rate of 40L / h; 36L / h, take off the furnace and drop to room temperature naturally, switch to nitrogen, and slowly pass through air for 15 minutes. Transfer the passivated catalyst to a beaker, add 300 ml of deionized water, and slowly add 27.6 g of a mass concentration of 10% potassium boroh...

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Abstract

The invention discloses a preparation method of a platinum-carbon catalyst, which comprises the following steps of treating an activated carbon carrier with silica gel in advance, impregnating a metal precursor in a spray mode, roasting, reducing with hydrogen, and treating with a liquid-phase reducing agent to obtain the platinum-carbon catalyst. The catalyst is simple in preparation method, easy to control and good in stability, and shows relatively high catalytic activity in a reaction for preparing tetravalent uranium by catalyzing hydrazine nitrate reduction.

Description

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Claims

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Application Information

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Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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