Preparation method and application of efficient zinc oxide fine desulfurizing agent

A zinc oxide, fine desulfurization technology, applied in catalyst activation/preparation, refining with metal oxides, chemical instruments and methods, etc., can solve the problems of easy volatility, limited regeneration, high price, etc., achieve high temperature stability, reduce Desulfurization cost, effect of good desulfurization performance

Active Publication Date: 2017-11-28
江苏天东新材料科技有限公司
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although zinc oxide has high desulfurization accuracy, there are still some problems in the process of industrial application: (1) Although the use temperature of zinc oxide is relatively wide, it is mainly used for desulfurization at medium and high temperatures, but its low-temperature sulfur capacity is low, The performance is poor, which is not conducive to the rational use of heat energy and the requirements of energy saving and consumption reduction; (2) At present, different temperatures of high temperature, medium temperature and low temperature correspond to different zinc oxide desulfurizers, which cannot be mixed or used in general; (3) The sulfur capacity of ZnO varies with temperature However, the thermal stability of zinc oxide desulfurizer is poor. When the temperature rises above 600°C, zinc oxide is very volatile, which limits the regeneration of ZnO. It is only a one-time consumable. Due to the high price of zinc, the cost of desulfurization is increased
[0005] Patent CN102961959A discloses a zinc oxide fine desulfurizer and its preparation and application method. The patent mixes and extrudes active zinc oxide, high alumina powder, bentonite, calcium hydroxide and sodium carboxymethyl cellulose. It shows a certain desulfurization activity at room temperature

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Prepare a 0.1mol / L sodium carbonate solution, and configure a total concentration of 0.1mol / L soluble Zn(NO 3 ) 2 , soluble coagent salt Cu(NO 3 ) 2 and soluble structural aid salt AlCl 3 mixed solution, and control Zn(NO 3 ) 2 , Cu(NO 3 ) 2 , AlCl 3 The molar percentages of the mixed solution are 80%, 15% and 5% respectively, and at a temperature of 70°C, the two solutions are added dropwise to a reactor placed in a microwave heating furnace, and stirred, by adjusting the sodium carbonate The rate of addition of the solution, the pH value of the control precipitation suspension is 6.5, until the dropwise addition of the mixed solution ends the precipitation;

[0039] (2) Continue to age the precipitated suspension by microwave radiation under the condition of stirring, and adjust the microwave aging temperature to 80°C, and control the aging time to 20min;

[0040] (3) The suspension after the aging is completed is first filtered through filter paper, and ...

Embodiment 2

[0048] (1) Prepare a 0.2mol / L sodium carbonate solution, and configure a total concentration of 0.2mol / L soluble Zn(AC) 2 , soluble coagent salt Ni(NO 3 ) 2 -FeCl 3 and soluble structural aid salt TiCl 4 mixed solution, and control Zn(AC) 2 , Ni(NO 3 ) 2 -FeCl 3 、TiCl 4 The molar percentages of the mixed solution are 78%, 5% and 17% respectively, and at a temperature of 67°C, the two solutions are added dropwise to a reactor placed in a microwave heating furnace, and stirred, by adjusting the sodium carbonate The rate of addition of the solution, the pH value of the control precipitation suspension is 6.6, until the dropwise addition of the mixed solution ends the precipitation;

[0049] (2) Continue to age the precipitated suspension by microwave radiation under the condition of stirring, and adjust the microwave aging temperature to 79°C, and control the aging time to 25min;

[0050] (3) The suspension after the aging is completed is first filtered through filter pa...

Embodiment 3

[0059] (1) Prepare a 0.3mol / L sodium carbonate solution, and configure a total concentration of 0.3mol / L soluble ZnCl 2 , soluble coagent salt MnCl 2 -MgCl 2 and soluble structural aid salt ZrCl 4 mixed solution, and control ZnCl 2 , MnCl 2 -MgCl 2 , ZrCl 4 The molar percentages of the mixed solution are 75%, 10% and 15% respectively, and at a temperature of 65°C, the two solutions are added dropwise to a reactor placed in a microwave heating furnace, and stirred, and by adjusting the sodium carbonate The rate of addition of the solution, the pH value of the control precipitation suspension is 6.8, until the dropwise addition of the mixed solution ends the precipitation;

[0060] (2) Continue to age the precipitated suspension by microwave radiation under the condition of stirring, and adjust the microwave aging temperature to 77°C, and control the aging time to 30min;

[0061] (3) The suspension after the aging is completed is first filtered through filter paper, and a...

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
Bulk densityaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of an efficient zinc oxide fine desulfurizing agent. The preparation method comprises the steps of enabling a sodium carbonate solution and a mixed solution of soluble zinc salt, soluble active aid salt and soluble carrier aid salt to react in a reactor of a microwave heating oven, carrying out microwave radiation aging and filtration under a stirring condition, preparing material liquid from a filter cake, carrying out spray drying and roasting, so as to obtain the finished desulfurizing agent. The efficient zinc oxide fine desulfurizing agent is high in sulfur capacity, simultaneously applicable to low-temperature, medium-temperature and high-temperature desulfurization and good in thermal stability.

Description

technical field [0001] The invention belongs to the field of preparation of a desulfurizing agent, in particular to a preparation method of a high-efficiency zinc oxide refined desulfurizing agent and the desulfurizing application of the desulfurizing agent. technical background [0002] At present, in the conversion and utilization of coal-to-synthesis gas, natural gas, coke oven gas, refinery dry gas, liquefied petroleum gas, carbon dioxide and liquefied hydrocarbons as chemical raw materials, the sulfide in the gas must be removed, which not only avoids the Catalyst poisoning in the follow-up section also ensures the quality of the product. At present, there are mainly two types of desulfurization technologies at home and abroad: wet desulfurization and dry desulfurization: wet desulfurization technology uses the absorption liquid to absorb sulfide in the gas source, and is mainly used for low desulfurization temperature, large gas treatment capacity, and low hydrogen sul...

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): B01J23/80B01J23/34B01J23/28B01J23/06B01J35/10B01J37/34B01J37/08C10K1/34C10L3/10C10L3/12C10G70/00C10G29/16B82Y30/00B82Y40/00
CPCB01J23/002B01J23/06B01J23/28B01J23/34B01J23/80B01J35/1014B01J35/1019B01J37/08B01J37/346B01J2523/00B82Y30/00B82Y40/00C10G29/16C10G70/00C10G2300/202C10K1/004C10K1/34C10L3/103C10L3/12B01J2523/27B01J2523/842B01J2523/847B01J2523/22B01J2523/72B01J2523/3712B01J2523/68B01J2523/67
Inventor 丁晶晶吴伟陈井凤于慧芳杨丽萍牛玉杰
Owner 江苏天东新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap