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Method for treating organic waste salt through low-temperature catalytic pyrolysis and application

A low-temperature catalysis and pyrolysis technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of inability to fix transition metal impurities, affect the quality of inorganic salts, and have no resource utilization, etc. The effect of low temperature and large processing capacity

Active Publication Date: 2020-07-17
佛山经纬纳科环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method is costly and prone to equipment loss, making it difficult to apply it in practice.
And it is impossible to fix a small amount of transition metal impurities that may exist in the waste salt, so that it remains in the treated inorganic salt, affecting the quality of the obtained inorganic salt
And above-mentioned method does not utilize the organic matter in the salt resourcefully, causes the waste of resources

Method used

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  • Method for treating organic waste salt through low-temperature catalytic pyrolysis and application
  • Method for treating organic waste salt through low-temperature catalytic pyrolysis and application
  • Method for treating organic waste salt through low-temperature catalytic pyrolysis and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 50g of H acid-sodium sulfate waste salt (taken from the sodium sulfate waste salt produced in the H acid process) in a beaker, add 0.5g of cetyltrimethylammonium bromide, 100mL of water, 50°C Heat and stir well.

[0043] (2) Put the uniformly stirred mixture into an oven for drying at 80° C., grind and sieve (100 mesh).

[0044] (3) Put the ground and sieved mixed solid into a tube furnace, raise the temperature to 500° C. at 5° C. / min under a nitrogen atmosphere, and keep it warm for 2 hours.

[0045] (4) Dissolve the pyrolyzed solid matter in 150 mL of water, stir with a magnetic stirrer until all the inorganic salts are dissolved, then filter, and collect the filtrate and filter residue respectively.

[0046] (5) The filtrate was evaporated and recrystallized in an oven at 80° C. to obtain sodium sulfate.

[0047] (6) Washing the filter residue with water and pickling multiple times to thoroughly remove impurities, freeze-drying, and graphitizing at 1000°...

Embodiment 2

[0050] (1) Weigh 50g of H acid-sodium sulfate waste salt into a beaker, add 0.5g of dodecyltrimethylammonium bromide, 100mL of water, heat and stir at 50°C until uniform.

[0051] (2) Move the refluxed solution to a beaker, put it into an oven for drying at 80° C., grind and sieve (100 mesh).

[0052] (3) Put the ground and sieved mixed solid into a tube furnace, raise the temperature to 500° C. at 5° C. / min under a nitrogen atmosphere, and keep it warm for 2 hours.

[0053] (4) Dissolve the pyrolyzed solid matter in 150 mL of water, stir with a magnetic stirrer until all the inorganic salts are dissolved, then filter, and collect the filtrate and filter residue respectively.

[0054] (5) The filtrate was evaporated and recrystallized in an oven at 80° C. to obtain sodium sulfate.

[0055] (6) After the filter residue is washed with water and pickled multiple times to thoroughly remove impurities, it is freeze-dried and graphitized at 1000° C. to obtain carbon nanomaterials. ...

Embodiment 3

[0058] (1) Weigh 50g of H acid-sodium sulfate waste salt beaker, add 0.5g of ammonium bromide, 100mL of water, heat and stir at 50°C until uniform.

[0059] (2) Move the refluxed solution to a beaker, put it into an oven for drying at 80° C., grind and sieve (100 mesh).

[0060] (3) Put the ground and sieved mixed solid into a tube furnace, raise the temperature to 500° C. at 5° C. / min under a nitrogen atmosphere, and keep it warm for 2 hours.

[0061] (4) Dissolve the pyrolyzed solid matter in 150 mL of water, stir with a magnetic stirrer until all the inorganic salts are dissolved, then filter, and collect the filtrate and filter residue respectively.

[0062] (5) The filtrate was evaporated and recrystallized in an oven at 80° C. to obtain sodium sulfate.

[0063] (6) After the filter residue is washed with water and pickled multiple times to thoroughly remove impurities, it is freeze-dried and graphitized at 1000° C. to obtain carbon nanomaterials.

[0064] This embodime...

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Abstract

The invention belongs to the technical field of industrial solid waste treatment and resource utilization, and discloses a method for treating organic waste salt through low-temperature catalytic pyrolysis and an application. The method comprises the steps: dissolving organic waste salt in water, adding an ammonium salt catalyst, heating, stirring and uniformly mixing; drying the obtained mixed solution, grinding, sieving, and pyrolyzing at the temperature of 300-700 DEG C in an inert atmosphere; dissolving the pyrolyzed solid in water, and filtering to obtain filter residues and filtrate; evaporating and recrystallizing the filtrate to obtain inorganic salt; and washing the filter residues to remove impurities, carrying out freeze drying, and carrying out graphitization treatment at the temperature of 900-1500 DEG C to obtain a carbon nanomaterial for a negative electrode of a supercapacitor or a battery. The inorganic salt extracted by the method is high in purity and quality, and can be reused in production; the obtained carbon nanomaterial can be used as a negative electrode material of the supercapacitor or the battery, so that waste is turned into wealth.

Description

technical field [0001] The invention belongs to the technical field of industrial solid waste treatment and resource utilization, and specifically relates to a method and application of low-temperature catalytic pyrolysis treatment of organic waste salt. Background technique [0002] A large number of toxic and harmful organic by-products are produced in many chemical production processes. Such as the production of phenol, acetone, formic acid, vitamin C, dye intermediates, etc., will produce a large amount of organic waste salt at the end of the device. The waste salt and residue discharged by the chemical industry have the characteristics of complex composition, high toxicity and harmfulness, difficult disposal, high treatment cost, etc., which are the difficulties in the treatment of hazardous waste in the industry. At present, enterprises basically use warehouse storage, open-air storage, or direct dumping to rivers and other places to deal with industrial waste salt. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/16C01B32/205H01M4/583H01M4/62H01G11/34H01G11/36H01G11/44B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01D5/16C01P2006/80C01B32/205H01G11/34H01G11/36H01G11/44H01M4/583H01M4/625Y02E60/10Y02E60/13
Inventor 冯春全李政邱郴
Owner 佛山经纬纳科环境科技有限公司
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