Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of pt/c catalyst for producing halogenated aniline and preparation method thereof

A halogenated aniline and catalyst technology, which is applied in the field of Pt/C catalyst for the production of halogenated aniline and its preparation, can solve the problems of difficult particle size control, low catalyst activity, shortened reaction time and the like, achieves resistance to organic amine poisoning, improves Reaction selectivity, the effect of improving selectivity

Active Publication Date: 2018-07-10
XIAN CATALYST NEW MATERIALS CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method can solve the technical problems of low platinum dispersion and difficult control of particle size in the prior art, which lead to low catalyst activity and poor selectivity. The platinum in the prepared catalyst is in a uniformly dispersed state, which greatly shortens the reaction time and has high reaction selectivity. The activity is increased by more than 30%, and the dechlorination impurities can be controlled below 0.1%

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
  • A kind of pt/c catalyst for producing halogenated aniline and preparation method thereof
  • A kind of pt/c catalyst for producing halogenated aniline and preparation method thereof
  • A kind of pt/c catalyst for producing halogenated aniline and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The Pt / C catalyst used in the production of haloanilines in this example is composed of a carrier and an active component and a metalloactive component loaded on the carrier, the carrier is activated carbon, the active component is Pt, and the The metal-helping components are La and Ba, and the mass percentage content of Pt in the catalyst is 1%, the mass percentage content of La is 0.01%, and the mass percentage content of Ba is 0.03%.

[0030] The preparation method of the Pt / C catalyst that this embodiment is used to produce haloaniline comprises the following steps:

[0031] Step 1, set the specific surface area to 1200m 2 Add activated carbon with a particle size of 50 μm to 74 μm per gram into a hydrogen peroxide solution with a mass concentration of 10%, soak for 3 hours at 23°C±2°C at standard room temperature, filter out the activated carbon, and then wash the filtered activated carbon with pure water To neutrality, then add the washed activated carbon into th...

Embodiment 2

[0036] The Pt / C catalyst used in the production of haloanilines in this example is composed of a carrier and an active component and a metalloactive component loaded on the carrier, the carrier is activated carbon, the active component is Pt, and the The metal-helping components are La and Ba, the mass percentage content of Pt in the catalyst is 1%, the mass percentage content of La is 0.05%, and the mass percentage content of Ba is 0.01%.

[0037] The preparation method of the Pt / C catalyst that this embodiment is used to produce haloaniline comprises the following steps:

[0038] Step 1, set the specific surface area to 1300m 2 Add activated carbon with a particle size of 50 μm to 74 μm per gram into a hydrogen peroxide solution with a mass concentration of 8%, soak it at 23°C±2°C for 2 hours, filter out the activated carbon, and then wash the filtered activated carbon with pure water To neutrality, then add the washed activated carbon into an ammonia solution with a mass c...

Embodiment 3

[0043] The Pt / C catalyst used in the production of haloanilines in this example is composed of a carrier and an active component and a metalloactive component loaded on the carrier, the carrier is activated carbon, the active component is Pt, and the The metal-helping components are La and Ba, the mass percentage content of Pt in the catalyst is 1%, the mass percentage content of La is 0.02%, and the mass percentage content of Ba is 0.02%.

[0044] The preparation method of the Pt / C catalyst that this embodiment is used to produce haloaniline comprises the following steps:

[0045] Step 1. Set the specific surface area to 1500m 2 Add activated carbon with a particle size of 50 μm to 74 μm per gram into a hydrogen peroxide solution with a mass concentration of 10%, soak for 2 hours at 23°C±2°C at standard room temperature, filter out the activated carbon, and then wash the filtered activated carbon with pure water To neutrality, then add the washed activated carbon into the am...

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
particle sizeaaaaaaaaaa
concentrationaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a Pt / C catalyst for producing haloanilines, the catalyst is composed of a carrier and an active component and a metal-helping component loaded on the carrier, the carrier is activated carbon, and the active component is Divided into Pt, the metal-helping components are La and Ba. The present invention also provides a method for preparing the catalyst, comprising the following steps: 1. pretreating the activated carbon; 2. preparing a precursor solution; 3. adding the activated carbon to the precursor solution for constant temperature stirring after beating; 4. Reduction, filtration, and washing treatments are performed to obtain a Pt / C catalyst. The invention can solve the technical problems of low platinum dispersion and difficult control of particle size in the prior art, which lead to low catalyst activity and poor selectivity. The platinum in the prepared catalyst is in a uniformly dispersed state, which greatly shortens the reaction time and has high reaction selectivity. The activity is increased by more than 30%, and the dechlorination impurities can be controlled below 0.1%.

Description

technical field [0001] The invention belongs to the technical field of preparation of supported noble metal catalysts, and in particular relates to a Pt / C catalyst used for producing halogenated anilines and a preparation method thereof. Background technique [0002] Halogenated anilines are an important class of organic intermediates, which are widely used in the fields of medicine, pesticides, dyes and daily chemicals, and are in great demand in the market. At present, most of the chloroanilines are produced by reduction of their corresponding nitro compounds, and the industrial methods mainly adopt iron powder, alkali sulfide, and catalytic hydrogenation reduction. Although the iron powder reduction method and the alkali sulfide reduction method are low in cost, they cause serious environmental pollution and are gradually eliminated. Catalytic hydrogenation reduction has attracted attention due to its advantages of atom economy, environmental friendliness and easy separa...

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 Patents(China)
IPC IPC(8): B01J23/63B01J37/02C07C209/36C07C211/52
CPCC07C209/365B01J23/63B01J37/0205B01J37/0207B01J35/399B01J35/393C07C211/52
Inventor 闫江梅李岳锋张鹏曾永康曾利辉张之翔
Owner XIAN CATALYST NEW MATERIALS CO LTD