Supercharge Your Innovation With Domain-Expert AI Agents!

Active carbon supported palladium catalyst for hydrogenation de-chlorination and preparation method thereof

A technology of hydrogenation dechlorination and palladium catalyst, which is applied in chemical industry and environmental protection field, can solve the problems of insufficient catalyst activity, excessive consumption of palladium metal, complicated production process, etc., and achieve enhanced selective adsorption capacity, reduced toxicity, and increased specific surface area Effect

Inactive Publication Date: 2019-07-05
SOUTH CHINA UNIV OF TECH
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain defects and deficiencies in the existing palladium-carbon catalyst preparation methods. The obtained catalyst has insufficient activity, excessive grain size, complex manufacturing process, unstable effect, and excessive consumption of palladium metal. Catalysts with good chlorine effects are necessary for the harmless treatment of chlorine-containing organics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Active carbon supported palladium catalyst for hydrogenation de-chlorination and preparation method thereof
  • Active carbon supported palladium catalyst for hydrogenation de-chlorination and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Activated carbon is ground, sieved, and the sieve hole of sieved is 80 orders, and the diameter of described powdery activated carbon particle is 0.18mm;

[0038] (2) 20g powdered activated carbon is put into the beaker, then add 20wt% dilute nitric acid solution 50mL (the mass volume ratio of described powdered activated carbon and dilute nitric acid solution is 2:5g / mL), stirring speed is 15rpm, stirs 5 Minutes, use an ultrasonic probe for 10 minutes, the ultrasonic frequency is 60kHz, then put it in a fume hood, treat it in a water bath at a constant temperature of 75°C for 18 hours, until no reddish-brown gas is released, wash the acid-washed activated carbon with distilled water until the last filtration The conductivity of the cleaning solution is up to 300us / cm, and it is placed in an oven, dried at 105°C for 4 hours, and then put into a reagent bag and sealed for storage;

[0039] (3) Weigh 10g PdCl 2 Dissolve in 20g of 36wt% concentrated hydrochloric acid ...

Embodiment 2

[0045] (1) activated carbon is ground, sieved, and the sieve hole of sieved is 120 orders, and the diameter of described powdery activated carbon particle is 0.125mm;

[0046] (2) 20g powdered activated carbon is put into the beaker, then add 15wt% dilute nitric acid solution 70ml (the mass volume ratio of powdered activated carbon and dilute nitric acid solution is 2:7g / mL), stirring speed is 10rpm, stirs 8 minutes, Use an ultrasonic probe for 15 minutes, the ultrasonic frequency is 80kHz, then put it in a fume hood, treat it in a water bath at a constant temperature of 80°C for 15 hours, until no reddish-brown gas is released, wash the acid-washed activated carbon with distilled water until the last filtered washing The conductivity of the solution is up to 300us / cm, and it is placed in an oven, dried at 110°C for 3 hours, and then put into a reagent bag for sealed storage;

[0047] (3) Weigh 10g PdCl 2 Dissolve in 25g of 37wt% concentrated hydrochloric acid solution, heat ...

Embodiment 3

[0053] The activated carbon is ground and sieved, and the sieve is 140 mesh, and the diameter of the powdered activated carbon particles is 0.1mm;

[0054] Put 20g of powdered activated carbon into a beaker, then add 100ml of 10wt% dilute nitric acid solution (the mass volume ratio of powdered activated carbon to dilute nitric acid solution is 2:10g / mL), the stirring rate is 5rpm, stir for 10 minutes, and use an ultrasonic probe to 20 minutes, the ultrasonic frequency is 100kHz, then put it into a fume hood, and treat it in a water bath at a constant temperature of 85°C for 20h, until no reddish-brown gas is released, and wash the acid-washed activated carbon with distilled water until the last filtered washing solution is neutral and place it in an oven, dry it at 120°C for 2 hours, then put it into a reagent bag and seal it for storage;

[0055] Weigh 10g PdCl 2 Dissolve in 30g of 38wt% concentrated hydrochloric acid solution, and heat slightly on the electric heating mantl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
crystal sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an active carbon supported palladium catalyst for hydrogenation de-chlorination and a preparation method thereof. The preparation method comprises following steps: grinding active carbon, sieving; processing active carbon by diluted nitric acid, soaking active carbon in a H2PdCl4 solution; adding a reducing agent (formaldehyde), carrying out reduction reactions; washing toremove residual negative ions; and drying to obtain a finished product. The preparation method has the following advantages: (1) active carbon has a good supporting performance and reducing performance; (2) the using amount of precious metal namely palladium is reduced, active carbon has a high melting point, and thus the sintering degree of palladium or metal oxide on the aggregate surface is reduced; and (3) the waste catalyst taking active carbon as the carrier is easy to process, and the active carbon can be burned. Chlorine in chlorine containing organic substances can pollute the environment severely; and when the chlorine containing organic substances are used as a fuel, the chlorine containing organic substances should be subjected to a de-chlorination treatment. The provided palladium-carbon catalyst has high activity, and the catalytic hydrogenation de-chlorination effect is better, compared with a conventional method.

Description

technical field [0001] The invention relates to the technical fields of environmental protection and chemical industry, in particular to an activated carbon-supported palladium catalyst for hydrodechlorination and a preparation method thereof. Background technique [0002] The output of polymer materials in the world is increasing year by year, and the environmental pollution caused by chlorine-containing organic compounds has become a global environmental problem. When chlorine-containing organic substances are burned as fuel, the chlorine atoms in them will not only cause corrosion of machinery and equipment, but also form acid rain when they enter the atmosphere, which is harmful to ecology and human health. Therefore, it is necessary to dechlorinate these chlorine-containing organic compounds. [0003] The application of electrochemical dechlorination technology has relatively large limitations, while biological dechlorination technology is not yet mature, and has not y...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J35/10B01J37/34C07C1/26C07C15/04
CPCB01J23/42B01J37/343C07C1/26C07C2523/42B01J35/61B01J35/60C07C15/04Y02P20/52
Inventor 马晓茜彭成熙唐玉婷
Owner SOUTH CHINA UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com