Preparation method of catalyst carrier as well as application of catalyst carrier

A catalyst carrier and binder technology, applied in the field of catalyst carrier preparation, can solve the problems of affecting catalyst activity, poor dispersibility of hydroxyl groups, easy to aggregate together, etc. Effect

Active Publication Date: 2019-10-15
THE NORTHWEST RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of hydroxyl groups, the silica is easy to gather together when it is formed, and the dispersion is not good, resulting in the loss of hydroxyl groups, which affects the catalyst activity.
Some researchers found that during the transition of the catalyst from powder to molded body, the activity loss of the catalyst is about 10%.

Method used

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  • Preparation method of catalyst carrier as well as application of catalyst carrier
  • Preparation method of catalyst carrier as well as application of catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of the present embodiment catalyst carrier comprises the following steps:

[0034] Step 1. Add 990g of white carbon black and 10g of silicon carbide into the wheel mill and mix well, then dilute 50g of water glass with a modulus of 3.3 with 1900g of water, add them to the wheel mill in batches and mix for 60min, take out The mixture was obtained after standing for 60 minutes, and then the mixture was placed in a twin-screw extruder for extruding to obtain a cylindrical shaped body with a diameter of 3.5 mm; the white carbon black was prepared by a precipitation method;

[0035] Step 2. Dry the molded body obtained in Step 1 at 150°C for 4 hours, then place it in a muffle furnace, and heat it up to 400°C for 120 minutes in an air atmosphere at a rate of 5°C / min to obtain a catalyst carrier.

[0036] The binder in this embodiment can also be water, clay, kaolin, paraffin, gum, starch paste, silica sol, aluminum sol, nitric acid solution or phosphori...

Embodiment 2

[0042] The preparation method of the present embodiment catalyst carrier comprises the following steps:

[0043] Step 1. Add 950g of white carbon black and 50g of silicon carbide into the wheel mill and mix well, dissolve 10g of dodecyl dimethyl hydroxypropyl sulfobetaine (HSB-12) in 500g of water and batch Add it into the wheel mill and mix evenly, then dilute 100g of silica sol with a mass concentration of 25% with 1400g of water, add it to the wheel mill in batches and mix for 40min, take it out and let it stand for 60min to get the mixture, then put the mixture in double Carry out extrusion molding in the screw extruder, obtain the cylindrical shaped body that diameter is 3.5mm; Described white carbon black is prepared by precipitation method;

[0044] Step 2. Dry the molded body obtained in step 1 at 130°C for 5 hours, then place it in a muffle furnace, and heat it up to 600°C for 10 minutes in an air atmosphere at a rate of 5°C / min to obtain a catalyst carrier.

[0045]...

Embodiment 3

[0048] The preparation method of the present embodiment catalyst carrier comprises the following steps:

[0049] Step 1. Add 970g of white carbon black and 30g of silicon carbide to the wheel mill and mix well. Dissolve 20g of Tween 80 in 500g of water and add them to the wheel mill in batches to mix evenly. After the water glass is diluted with 1390g of water, it is added to the wheel mill in batches and mixed for 10 minutes. After taking it out and standing for 60 minutes, the mixture is obtained, and then the mixture is placed in a twin-screw extruder for extrusion molding to obtain a cylinder with a diameter of 3.5mm. Forming a body; the white carbon black is prepared by a precipitation method;

[0050] Step 2. Dry the molded body obtained in step 1 at 200°C for 6 hours, then place it in a muffle furnace, and heat it up to 500°C for 300 minutes in an air atmosphere at a rate of 5°C / min to obtain a catalyst carrier.

[0051] The binder in this embodiment can also be water,...

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Abstract

The invention discloses a preparation method of a catalyst carrier. The method comprises the steps of mixing white carbon black, an adhesive, a surfactant and / or silicon carbide uniformly, performingextrusion molding, and drying and roasting to obtain the catalyst carrier. The invention also discloses application of the catalyst carrier. An N-hydroxyethyl pyrrolidone dehydration synthesized N-vinyl pyrrolidone catalyst is prepared by loading a catalyst precursor on the carrier catalyst by a dipping method. The surfactant and / or the silicon carbide is introduced into the preparation raw materials of the catalyst carrier, so that uniform dispersion of the white carbon black is promoted, hydroxyl agglomeration is avoided, the activity loss of the catalyst is reduced and the mechanical strength of the carrier is improved. The catalyst carrier is applied to preparation of the N-hydroxyethyl pyrrolidone dehydration synthesized N-vinyl pyrrolidone catalyst, the active center number of the catalyst is increased and the activity of the catalyst after formation is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method and application of a catalyst carrier. Background technique [0002] Generally, the use and storage of industrial catalysts require shaped catalysts. Through processing and shaping, the catalysts can obtain suitable shapes, sizes and mechanical strengths, which are suitable for catalytic reactions and catalytic devices. At the same time, they are easy to store and promote the large-scale industrial development and application of catalysts. . However, the activity of the catalyst after molding tends to decrease, so the research on the molding method is very important. In practice, the catalyst is often supported on a suitable catalyst carrier and then shaped. As a catalyst carrier, it must have a suitable surface area, pore size, shape and porosity to load the required amount of catalyst active components. It needs to have a certain str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J27/224B01J27/228B01J35/02C07D207/267
CPCB01J32/00B01J27/224B01J27/228B01J35/02B01J35/0066C07D207/267
Inventor 潘喜强王瑞曾清湖吴西宁高亚娜李玉洁
Owner THE NORTHWEST RES INST OF CHEM IND
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