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Method for preparing magnetic 5A molecular sieve from coal gangue and application of magnetic 5A molecular sieve

A molecular sieve and coal gangue technology, applied in the field of preparation of magnetic 5A molecular sieve, can solve problems such as high cost, and achieve the effects of high crystallinity, regular crystal morphology and uniform crystal distribution

Inactive Publication Date: 2018-02-09
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention uses coal gangue to prepare magnetic molecular sieves and proposes a new process for preparing magnetic molecular sieves from coal gangue, which not only solves the high-cost problem of molecular sieve synthesis, but also provides new resources, refinement, and high-efficiency utilization of coal gangue. approach, to achieve the effect of turning waste into treasure, and to meet the requirements of environmental protection and low carbon

Method used

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  • Method for preparing magnetic 5A molecular sieve from coal gangue and application of magnetic 5A molecular sieve
  • Method for preparing magnetic 5A molecular sieve from coal gangue and application of magnetic 5A molecular sieve
  • Method for preparing magnetic 5A molecular sieve from coal gangue and application of magnetic 5A molecular sieve

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Effect test

Embodiment 1

[0037] This embodiment utilizes coal gangue to prepare magnetic 5A molecular sieves, including the following steps:

[0038] Step 1: Grind coal gangue to 325 mesh and place it in an ash dish, then add sodium carbonate to the ash dish, roast for 3 hours at a temperature of 850° C. and then grind to obtain a pretreated sample; the coal gangue and carbonic acid The mass ratio of sodium is 2:1;

[0039] Step 2, oxidizing the pretreated coal gangue powder at 350°C for 2h, adding hydrochloric acid with a mass concentration of 15%, soaking at 95°C for 2h, and filtering to obtain filtered solids and filtrate;

[0040] Step 3. Weigh 3.36g of NaOH and 150ml of deionized water and dissolve them in a 500ml Erlenmeyer flask; add cobalt acetate to the filtrate, and add 0.1g of cobalt acetate to each gram of gangue. After dissolving, pour the filtrate into boiling In the Erlenmeyer flask, reflux for 1h, wash and filter to pH=7, and dry to obtain magnetic ferric cobaltate;

[0041] Step 4. ...

Embodiment 2

[0048] This embodiment utilizes coal gangue to prepare magnetic 5A molecular sieves, including the following steps:

[0049] Step 1: Grind coal gangue to 325 mesh and place it in an ash dish, then add sodium carbonate to the ash dish, roast for 3 hours at a temperature of 880° C. and then grind to obtain a pretreated sample; the coal gangue and carbonic acid The mass ratio of sodium is 2.5:1;

[0050] Step 2, oxidize the pretreated coal gangue powder at 350° C. for 2 hours, add hydrochloric acid with a mass concentration of 15%, soak at 95° C. for 3 hours, and filter to obtain filtered solids and filtrate;

[0051] Step 3. Weigh 3.36g of NaOH and 150ml of deionized water and dissolve them in a 500ml Erlenmeyer flask; add cobalt acetate to the filtrate, and add 0.08g of cobalt acetate to each gram of coal gangue. After dissolving, pour the filtrate into boiling In the Erlenmeyer flask, reflux for 1h, wash and filter to pH=7, and dry to obtain magnetic ferric cobaltate;

[005...

Embodiment 3

[0055] This embodiment utilizes coal gangue to prepare magnetic 5A molecular sieves, including the following steps:

[0056] Step 1: Grind coal gangue to 325 mesh and place it in an ash dish, then add sodium carbonate to the ash dish, roast for 2 hours at a temperature of 900° C. and then grind to obtain a pretreated sample; the coal gangue and carbonic acid The mass ratio of sodium is 3:1;

[0057] Step 2, oxidizing the pretreated coal gangue powder at 400°C for 2h, adding hydrochloric acid with a mass concentration of 15%, soaking at 85°C for 3h, and filtering to obtain filtered solids and filtrate;

[0058] Step 3. Weigh 3.36g of NaOH and 150ml of deionized water and dissolve them in a 500ml Erlenmeyer flask; add cobalt acetate to the filtrate, and add 0.09g of cobalt acetate to each gram of gangue. After dissolving, pour the filtrate into boiling In the Erlenmeyer flask, reflux for 1h, wash and filter to pH=7, and dry to obtain magnetic ferric cobaltate;

[0059] Step 4....

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Abstract

The invention discloses a method for preparing a magnetic 5A molecular sieve from coal gangue and application of the magnetic 5A molecular sieve. The method comprises the following steps: after milling coal gangue, performing high-temperature roasting by using sodium carbonate to activate the coal gangue; performing oxidization at low temperature, adding hydrochloric acid, performing soaking at 90DEG C, performing filtration, and adding sodium hydroxide and cobalt acetate into the filtrate to prepare iron cobaltate; after washing the solid, performing drying, adding a sodium hydroxide solid,performing uniform mixing by grinding, and performing low-temperature alkali fusion; and adding deionized water, calcium chloride and citric acid, performing aging at 60 DEG C, adding the iron cobaltate, and performing ultrasonic treatment to synthesize the magnetic 5A molecular sieve by crystallization. The 5A molecular sieve prepared by the method has the advantages of favorable oxidation resistance, high specific surface area, high adsorbability and the like, and the product can be easily subjected to solid-liquid separation through an external magnetic field; and the 5A molecular sieve solves the problem of high synthesis cost of the molecular sieve, provides a new way for cyclic, refined and efficient utilization of coal gangue, achieves the effect of changing wastes into valuable substances, and satisfies the requirements of environmental protection and low carbon.

Description

technical field [0001] The invention belongs to the technical field of 5A molecular sieve preparation, and in particular relates to a preparation method and application of a magnetic 5A molecular sieve. Background technique [0002] Coal gangue is solid waste discharged during coal mining and coal preparation. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process, and has a large output. At present, the application of coal gangue is mainly limited to the construction industry, energy industry and agriculture, and the utilization level and proportion are relatively low. Its large accumulation not only affects the environment but also occupies a large amount of land. Using it to prepare molecular sieves can not only reduce pollution, expand the source of raw materials for molecular sieves, but also increase its added value and expand the utilization of coal gangue. There are two types of molec...

Claims

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Application Information

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IPC IPC(8): C01B39/14C02F1/48C02F101/20
CPCC01B39/14C01P2002/72C01P2002/82C01P2004/03C02F1/48C02F2101/20
Inventor 杨建利杜美利高战辉李红岩李刚王博于春侠李锦樊锦文庞雅杰
Owner XIAN UNIV OF SCI & TECH
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