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Process for preparing flue gas desulfurization agent

A desulfurizer and flue gas technology, applied in the field of preparation of flue gas desulfurizer, can solve problems such as animal and plant harm, environmental pollution, etc., and achieve the effects of low price, cost reduction, and great environmental protection significance

Inactive Publication Date: 2007-02-14
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phenanthrene slag is the residue in the process of coal tar processing crude anthracene separation to produce refined anthracene. It mainly contains phenanthrene, carbazole and a small amount of anthracene. Since phenanthrene slag has not yet found an effective way to use it, it is often piled up in large quantities in the factory area as waste residue. These condensed ring aromatic compounds are extremely harmful to animals and plants (some derivatives of phenanthrene and anthracene are strong carcinogens), causing serious pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] 1) Synthesis of macromolecular compounds: In a stirred reactor, the molar ratio of raw materials is: phenanthrene: formaldehyde: benzaldehyde = 1: 0.8~1.2: 0.01~0.05 Add raw materials, use concentrated sulfuric acid as a catalyst, press phenanthrene Add concentrated sulfuric acid to 3% to 5% of the slag mass, and react according to the following steps:

[0017] (1) Raw material pretreatment: First, add phenanthrene slag into the reaction kettle according to the proportion of ingredients, heat up the temperature, start stirring after the phenanthrene slag melts, and vacuumize at 100°C-120°C for 30-60 minutes to remove moisture and coarse Solvent oil brought in during the separation of anthracene to refine anthracene;

[0018] (2) Condensation: Cool down to 80°C-90°C, add concentrated sulfuric acid according to the proportion, and within 30 minutes, slowly add formaldehyde solution with a mass percentage of 37%, after adding formaldehyde, maintain the reaction temperature...

Embodiment approach 2

[0022] According to the processing method of embodiment 1, the molar ratio of its raw materials is: phenanthrene: formaldehyde: benzaldehyde=1: 0.8: 0.01, add the concentrated sulfuric acid by 3% of phenanthrene slag quality

Embodiment approach 3

[0024] According to the processing method of embodiment 1, the molar ratio of its raw materials is: phenanthrene: formaldehyde: benzaldehyde=1: 1.0: 0.025, add the concentrated sulfuric acid by 4% of phenanthrene slag quality

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Abstract

A process for preparing the fume-desulfurizing agent includes such steps as proportionally mixing phenanthrene dregs, form-aldehyde and benzaldehyde, adding sulfuric acid as catalyst, condensation reaction, carbonization at 600-800 deg C, pulverizing, sieving and activating.

Description

technical field [0001] The present invention relates to a kind of preparation method of flue gas desulfurization agent, especially flue gas removes SO 2 The invention discloses a method for preparing a flue gas desulfurizer by condensing phenanthrene slag with formaldehyde and benzaldehyde. Background technique [0002] Environmental problems are one of the most serious problems faced by human beings. It is directly related to the survival and development of human beings. Sulfur dioxide pollutes the atmosphere extremely seriously. my country's SO 2 The emissions are huge. Therefore, the control of sulfur dioxide emissions is of special importance to my country's environmental protection. To control SO 2 Emissions reduce its pollution to the atmosphere. Researchers have conducted a lot of research on flue gas desulfurizers. For the preparation of desulfurizers, the raw materials used are different and the preparation methods are also different, but the focus of the researc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50
Inventor 刘祖愉赵志换刘成岑王志忠
Owner TAIYUAN UNIV OF TECH
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