Solid super acid and application thereof in preparing 4,4'-diaminodiphenylmethane

A technology of diaminodiphenylmethane and solid super acid, applied in the preparation of amino compounds, preparation of organic compounds, molecular sieve catalysts, etc., can solve the problem of small annual consumption of fly ash, human and biological hazards, and easy generation of dust problem, to achieve the effect of good reuse, no corrosion of equipment, and increased wear and tear of equipment

Inactive Publication Date: 2011-05-18
河南省华鼎高分子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large amount of fly ash is directly discarded without any treatment, which is very easy to generate dust and pollute the atmosphere. If it is discharged into the water system, it will cause river silting. The toxic chemicals in it will also pollute the water body, causing harm to humans and organisms.
In recent years, the resource utilization of fly ash has become an important part of my country's sustainable development strategy decision-making, but the comprehensive utilization of fly ash is still mainly focused on the use of its potential gelling properties, mainly used in building materials, construction In engineering, road engineering and other fields, there is a problem of low added value, and the annual consumption of fly ash is not large

Method used

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  • Solid super acid and application thereof in preparing 4,4'-diaminodiphenylmethane
  • Solid super acid and application thereof in preparing 4,4'-diaminodiphenylmethane
  • Solid super acid and application thereof in preparing 4,4'-diaminodiphenylmethane

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] Fly ash SO 4 2- The solid superacid is prepared from waste fly ash of coal-fired power plants, and its preparation method includes the following steps:

[0026] (1) Treatment of fly ash: Fly ash waste from coal-fired power plants is decarbonized by flotation, washed 3 times with deionized water, dried at 120°C for 5 hours, cooled, dispersed, passed through 200 sieves, and kept under the sieve thing;

[0027] (2) Treatment of undersize: Take 10g of undersize and put it into 40ml of hydrochloric acid and stir to fully dissolve the soluble matter that can dissolve in hydrochloric acid in the undersize, then heat to boiling and keep for 1 hour, cool, and use ammonia water Adjust the pH value to 9.7, then lower it to 10°C and keep it for 24 hours for low-temperature aging, filter, and wash the filter cake to be free of Cl - After detection, the filter cake was dried at 120°C for 12 hours and cooled to room temperature to obtain A;

[0028] (3) Put A into 50ml of sulfuric...

Embodiment 2

[0030] Fly ash SO 4 2- The solid superacid is prepared from waste fly ash of coal-fired power plants, and its preparation method includes the following steps:

[0031] (1) Treatment of fly ash: The fly ash of coal-fired power plant waste is decarbonized by flotation, washed 5 times with deionized water, dried at 120°C for 5 hours, cooled, dispersed, passed through 200 sieves, and kept under the sieve thing;

[0032] (2) Treatment of undersize: Take 10g of undersize and put it into 35ml of hydrochloric acid and stir to fully dissolve the soluble matter in the undersize that can dissolve in hydrochloric acid, then heat to boiling and keep for 4 hours, cool, and use ammonia water Adjust the pH value to 9.2, then lower it to 0°C and keep it for 3 hours for low-temperature aging, filter, and wash the filter cake to be free of Cl - After detection, the filter cake was dried at 120°C for 12 hours and cooled to room temperature to obtain A;

[0033] (3) Put A into 65ml of sulfuric...

Embodiment 3

[0035] Fly ash based zeolite SO 4 2- The solid superacid is prepared from waste fly ash of coal-fired power plants, and its preparation method includes the following steps:

[0036] (1) Treatment of fly ash: Fly ash waste from coal-fired power plants is decarbonized by flotation, washed 3 times with deionized water, dried at 120°C for 5 hours, cooled, dispersed, passed through 200 sieves, and kept under the sieve thing;

[0037] (2) Treatment of undersize: Put 10 g of undersize into 60 ml of 35% aqueous sodium hydroxide solution and stir to fully dissolve the soluble matter in the undersize that can be dissolved in aqueous sodium hydroxide solution. Then heated to boiling and kept for 2 hours, cooled to 5°C and kept for 18 hours for low-temperature aging, filtered, washed the filter cake until the pH value of the filtrate was 9.0, dried the filter cake at 120°C for 12 hours, cooled to room temperature, and obtained B ;

[0038] (3) Immerse B in 20ml of sulfuric acid soluti...

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Abstract

The invention discloses a solid super acid and application thereof in preparing 4,4'-diaminodiphenylmethane. The solid super acid is prepared from waste pulverized fuel ash of a coal fired power plant. A preparation method of the solid super acid comprises the steps of: treating the pulverized fuel ash, treating screenings, dipping the screenings into in a 10mol / l sulfuric acid solution for 1-10 hours, carrying out suction filter, and sintering filter residues at 450-650 DEG C for 4 hours to obtain the solid super acid. The invention not only provides a new approach to the utilization of the waste pulverized fuel ash, but also solves the problem of environmental pollution caused by the pulverized fuel ash, and has important social and economic significance. Since the solid super acid provided by the invention has an extremely low cost and a simple preparation method, the prepared solid super acid has low price and good marketization prospect.

Description

technical field [0001] The invention belongs to the technical field of organic catalytic synthesis, in particular to a solid superacid and its application in the preparation of 4,4'-diaminodiphenylmethane. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion. It is the main solid waste discharged from coal-fired power plants, accounting for about 80% to 95% of the power plant's waste residue. Fly ash is one of the largest industrial wastes in my country. With the development of the power industry, the discharge of fly ash from coal-fired power plants is increasing year by year. At present, a large amount of fly ash is directly discarded without any treatment, which is very easy to generate dust and pollute the atmosphere. If it is discharged into the water system, it will cause river silting. The toxic chemicals in it will also pollute the water body and cause harm to humans and organisms. In recent years, the resource uti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053B01J29/04C07C211/50C07C209/78
Inventor 李伟苏毅王世兵牛静韩娟
Owner 河南省华鼎高分子股份有限公司
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