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

Supported catalyst as well as preparation method and application thereof

A supported catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy shedding of active substances, ineffectiveness of active components, and environmental pollution, etc., to achieve Not easy to fall off, good catalytic efficiency effect

Active Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, during the loading process of high-temperature spraying, a large amount of active substances are taken away with the evaporation of water vapor, resulting in the loss of active substances, polluting the environment, and having a certain impact on the health of the staff
[0006] In addition, during the high-temperature spraying process of the catalyst, a large amount of water in the active material slurry evaporates, resulting in a very low water content of the catalyst, which makes the binding force between the active material and the carrier weak, resulting in poor strength of the catalyst, and the active material is easy to fall off. Catalytic performance; in addition, the performance of the catalyst will be affected during the repeated use of the catalyst, especially in the high-temperature reaction process during start-up and shutdown operations, the active material of the catalyst is subject to strong temperature changes and is easy to fall off from the surface of the carrier
[0007] Due to various problems in the high-temperature preparation process of the above-mentioned catalyst, the performance of the catalyst is deteriorated, the same amount of active components cannot exert greater efficiency, and the yield and quality of the maleic anhydride product are also greatly affected.

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
  • Supported catalyst as well as preparation method and application thereof
  • Supported catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The present invention also provides a method for preparing a supported catalyst, which may include the following steps: (1) mixing a solution or suspension containing an active substance with a binder to obtain a slurry, wherein the binder is a polymer One or more in acrylic resin, polyphenolic resin, polyvinyl alcohol glue and polyvinyl acetate; (2) the slurry described in step (1) is coated on the carrier and dried, and the temperature of described coating 100-200°C; the amount of the solution or suspension containing the active substance, the binding agent and the carrier is such that, based on the total weight of the catalyst, the content of the active substance is 5-30% by weight, and the active substance and The weight ratio of the binder is 1:0.02-0.15; preferably, based on the total weight of the catalyst, the content of the active material is 8-20% by weight, the active material and the binder The weight ratio is 1:0.05-0.11.

[0034] In the present invention,...

Embodiment 1

[0060] This example is used to illustrate the supported catalyst provided by the present invention.

[0061] (1) Preparation of slurry containing active substances

[0062] Mix 48.6g oxalic acid, active substance 33.6g ammonium metavanadate and 300mL water, add active substance 19.8g ammonium molybdate, 2.49g sodium phosphate, 1.5g nickel nitrate, 1g ammonium dihydrogen phosphate, 0.05g nitric acid Rubidium and 0.03g of erbium oxide; then 5.85g of polyvinyl alcohol glue (glass transition temperature of 85°C, degree of polymerization of 1700-2400) was added to obtain a dark green slurry, and the measured apparent viscosity of the slurry was 18mPa.s.

[0063] (2) Preparation of supported catalyst

[0064] 260g of ring-shaped carrier was placed in the drum, and the drum was rotated at a speed of 18 rpm while preheating the carrier to 150°C by means of a heating device. Use an atomizer to atomize the above slurry into tiny droplets at 150° C. and coat on a carrier at a pressure ...

Embodiment 2

[0081] (1) Preparation of slurry containing active substances

[0082] The slurry was prepared according to the method of step (1) of Example 1, except that the active substance was mixed with 400 mL of water, and the measured apparent viscosity of the slurry was 5 mPa·s.

[0083] (2) Preparation of supported catalyst

[0084] The supported catalyst was prepared according to the method in step (2) of Example 1 to obtain supported catalyst B, wherein the active substance content was 13.0% by weight.

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
Apparent viscosityaaaaaaaaaa
Glass transition temperatureaaaaaaaaaa
Apparent viscosityaaaaaaaaaa
Login to View More

Abstract

The invention provides a supported catalyst as well as a preparation method and an application thereof, wherein the catalyst comprises a carrier and an active substance and a binder loaded on the carrier, the binder is made of one or more substances among polyacrylic resin, poly phenolic resin, polyvinyl alcohol glue and polyvinyl acetate, by taking the total weight of the catalyst as the benchmark, the content of the active substances is 5-30wt%, and the weight ratio of the active substances to the binder is 1: (0.02-0.15). The invention also provides a method for preparing maleic anhydride by oxidizing the benzene of the supported catalyst. Due to the utilization of the supported catalyst, the active substances in the catalyst are not easy to fall off in repeated started and suspended production of the catalyst, and good catalysis efficiency can be maintained.

Description

technical field [0001] The invention relates to a supported catalyst and its preparation method and application, more precisely, to a supported catalyst, its preparation method and a method for preparing maleic anhydride by benzene oxidation using the supported catalyst. Background technique [0002] Maleic anhydride is also known as maleic anhydride or dehydrated malic anhydride, often referred to as maleic anhydride. Maleic anhydride is an important organic chemical intermediate, which can be used to make plasticizers in the plastic industry; paper treatment agents in the paper industry; unsaturated polyester resins in the synthetic resin industry; alkyd coatings in the paint industry; pesticides Synthesis of malathion in production; production of sulfa drugs in the pharmaceutical industry, etc. [0003] The production of maleic anhydride mainly uses benzene or n-butane as raw material. Currently, the production of maleic anhydride with benzene as raw material accounts fo...

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
IPC IPC(8): B01J37/02B01J23/887C07D307/60
Inventor 陈雅萍黄凤兴贾雪飞
Owner CHINA PETROLEUM & CHEM CORP