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Method for synthesizing zeolite from fine coal gasification slag, and zeolite material prepared therethrough

A technology for synthesizing zeolite and coal gasification, which is applied in the field of solid waste resource utilization and achieves the effects of simple preparation process, low cost and good separation effect

Active Publication Date: 2018-03-30
鄂尔多斯市慧恒科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, up to now, the synthesis of microporous zeolite materials using coal gasification fine slag as raw material has not been reported.

Method used

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  • Method for synthesizing zeolite from fine coal gasification slag, and zeolite material prepared therethrough
  • Method for synthesizing zeolite from fine coal gasification slag, and zeolite material prepared therethrough
  • Method for synthesizing zeolite from fine coal gasification slag, and zeolite material prepared therethrough

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 100g coal gasification fine slag (wherein water content is 55%), add water and dilute to solid content is 10%, adopt high-speed dispersing mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir under normal temperature, stirring speed is 1600r / min, stirring time is 50min; the slurry was introduced into a cyclone separator for separation, and the obtained lower slurry was a silicon-rich slurry. After testing, the carbon content in the solid phase was 6.8wt%, and most of the carbon was separated in the upper part;

[0034] Adjust the solid content of the silicon-rich slurry to 10wt%, according to the water content, add sodium hydroxide and dissolve it in water to make the concentration reach 10wt%; stir and age for 2 hours; the aging temperature is 60°C to obtain the precursor;

[0035] The obtained precursor was moved into a sealed reaction kettle for hydrothermal synthesis, the crystallization temperature was 100°C; the crystallization time was 8h, then washed w...

Embodiment 2

[0037] Weigh 100g coal gasification fine slag (wherein water content is 55%), add water and dilute to solid content is 20%, adopt high-speed dispersing mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir under normal temperature, stirring speed is 1700r / min, stirring time is 40min; the slurry was introduced into a cyclone separator for separation, and the obtained lower slurry was a silicon-rich slurry. After testing, the carbon content in the solid phase was 5.5wt%;

[0038] Adjust the solid content of the silicon-rich slurry to 10wt%, according to the water content, add sodium hydroxide and dissolve it in water to make the concentration reach 10wt%; stir and age for 3 hours; the aging temperature is 80°C to obtain the precursor;

[0039] The obtained precursor was moved into a sealed reaction kettle for hydrothermal synthesis, and the crystallization temperature was 110°C; the crystallization time was 6 hours, then washed with water, and dried at 120°C; the obtained pro...

Embodiment 3

[0041] Weigh 100g coal gasification fine slag (wherein water content is 55%), add water and dilute to solid content is 20%, adopt high-speed dispersing mixer (Guangdong Foshan Yifu Machinery Co., Ltd.) to stir under normal temperature, stirring speed is 1500r / min, stirring time is 60min; the slurry was introduced into a cyclone separator for separation, and the obtained lower slurry was a silicon-rich slurry. After testing, the carbon content in the solid phase was 6.2wt%;

[0042] Adjust the solid content of the silicon-rich slurry to 5wt%, according to the water content, add sodium hydroxide and dissolve it in water to make the concentration reach 5wt%; add sodium sulfite with a molar ratio of 30% to iron oxide as a reducing agent, and stir and age for 3 hours ; The aging temperature is 80°C to obtain the precursor;

[0043] The obtained precursor was moved into a sealed reaction kettle for hydrothermal synthesis, the crystallization temperature was 120°C; the crystallizatio...

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Abstract

The invention discloses a method for synthesizing zeolite from fine coal gasification slag, and a zeolite material prepared therethrough. The method comprises the following steps: 1, taking a proper amount of the fine coal gasification slag, and adding water to prepare a fine coal gasification slag slurry with the solid content being 10-30 wt%; 2, fully stirring the slurry prepared in step 1, performing gravity cyclone separation, and collecting the obtained heavy separation product to obtain a silicon-rich composite slurry, wherein the carbon content of a solid phase in the silicon-rich composite slurry is less than 10 wt%; 3, adjusting the solid content of the silicon-rich composite slurry to 5-10 wt%, adding NaOH to make the concentration of the NaOH in the slurry reach 4-10 wt%, and stirring and reacting the slurry at 40-80 DEG C to obtain a precursor; and 4, transferring the precursor into a reaction kettle, sealing the reaction kettle, performing a hydrothermal synthesis reactionat 100-140 DEG C for 4-10 h, and then carrying out solid-liquid separation, washing and drying to obtain the synthesis product. The iron-supported micro-porous zeolite is obtained through the hydrothermal synthesis of the fine coal gasification slag, so the development of the high-added value product from low-carbon and high-silicon ferroaluminum components in the fine coal gasification slag is realized, and wastes are changed into valuables.

Description

technical field [0001] The invention belongs to the technical scope of resource utilization of solid waste, and in particular relates to a method for synthesizing microporous zeolite by using coal gasification fine slag and the prepared zeolite material. Background technique [0002] Coal gasification technology is one of the core contents of clean coal technology. Incomplete oxidation of coal to obtain combustible coal gasification gas (such as crude gas) for downstream use has rapidly become an important direction of coal resources and energy utilization in recent years. In the past 20 years, my country has built a number of coal chemical enterprises in Yulin, Shaanxi, Ordos, Inner Mongolia, Changzhi, Shanxi and other places, which have been put into production one after another, and the output has increased year by year. The clean and comprehensive utilization of coal resources has formed a certain scale in my country. [0003] In the coal gasification technology system, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/18B01J20/22B01J2220/4887
Inventor 蒋引珊夏茂盛魏存弟薛兵徐少南朱丹丹
Owner 鄂尔多斯市慧恒科技有限责任公司
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