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Industrial activated carbon recovery and treatment to prepare soil conditioner, preparation method and application

A soil improver and recovery treatment technology, applied in the field of waste reuse, can solve the problems of difficult recovery of activated carbon, soil and water source pollution, high treatment costs, etc., achieve good moisture absorption and moisture retention and overall air permeability, simple treatment method, The effect of stable performance

Active Publication Date: 2019-03-19
山东崇舜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Activated carbon is an auxiliary agent often used in the chemical industry. It can be used as decolorization, adsorption, catalyst carrier, etc. After use, except for individual processes that can be recycled, activated carbon is basically incinerated as solid waste. Due to the The complexity of the process, many recycled activated carbons contain toxic and harmful substances, and cannot be simply burned
[0003] Some organic amine synthesis industries use activated carbon for decolorization treatment. The filtered activated carbon contains organic amine components, and most organic amines are toxic and harmful substances. Therefore, this kind of industrial recycled activated carbon cannot be simply buried. It is easy to cause soil and water pollution. , Usually incineration treatment, due to the presence of nitrogen in amines, and some amines also contain elements such as chlorine, phosphorus, sulfur, etc., a large amount of harmful gases will also be produced during incineration, so it is difficult for this type of industrial recovery of activated carbon to process, and higher processing costs
[0004] In some isocyanate synthesis industries, activated carbon is used for decolorization treatment. The filtered activated carbon has adsorbed isocyanate components. Because isocyanate compounds are highly active and most of them are toxic, in the past, this type of industrial recovery of activated carbon usually undergoes pretreatment first. Destroy it, and then incinerate it. Incineration also produces a large amount of toxic and harmful gases, and it is difficult to dispose of, and the cost is relatively high.

Method used

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  • Industrial activated carbon recovery and treatment to prepare soil conditioner, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one, Treatment and Utilization of Activated Carbon for MOCA and NDI Production

[0026] Add 600KG of ethyl acetate solution to a 1000L enamel reaction kettle, add 30KG of industrially recovered activated carbon adsorbed with 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA), and analyze the activated carbon MOCA converted to amino (-NH 2 ) mole number is 22.4mol, start stirring, after stirring evenly, add 50KG of industrially recovered activated carbon adsorbed with 1,5-naphthalene diisocyanate (NDI), after analyzing the NDI adsorbed in the activated carbon, it is converted into the mole number of isocyanate group (-NCO) It is 22.6mol, and then the temperature is raised to 65-70°C to react for 2 hours. After the reaction, the temperature is lowered to normal temperature for filtration, the filtrate is collected and distilled to recover the solvent ethyl acetate, and the recovered solvent ethyl acetate can be used in production again; the filter cake is sample...

Embodiment 2

[0028] Embodiment two, Treatment and Utilization of Activated Carbon Used in TODI and MED Production

[0029] Add 650KG of dichloromethane to a 1000L enamel reaction kettle, add 40KG of industrially recovered activated carbon adsorbed with 3,3'-dimethyl-4,4'-biphenyl diisocyanate (TODI), and convert the amount of TODI adsorbed in the activated carbon into The molar number of isocyanate group (-NCO) is 18.8mol, start stirring, and after stirring evenly, add 4,4'-methylenebis(2-methyl-6-ethylaniline) (MED) adsorbed in the industrial recovery Activated carbon 40KG, converted to amino (-NH 2 ) molarity is 18.4mol, reacts at 25~30 ℃ for 2 hours then, cools to normal temperature after the reaction finishes and filters, and the filtrate is collected and distilled and recovered solvent methylene chloride, and the solvent methylene chloride recovered can be used for production again; filter cake Sampling detection does not contain amino groups (-NH 2 ) and isocyanate group (-NCO), ...

Embodiment 3

[0031] Embodiment three, Treatment method and utilization of activated carbon for TPTI and NDA production

[0032] Add 600KG butyl acetate to a 1000L enamel reaction kettle, add 30KG of industrially recovered activated carbon adsorbed with 4,4'4"-triisocyanatotriphenylphosphorothioate (TPTI), and convert the TPTI adsorbed in the activated carbon into The molar number of isocyanate group (-NCO) is 7.9 mol. Start stirring, and after stirring evenly, add 30KG of industrially recovered activated carbon adsorbed with 1,5-naphthalene diamine (NDA). After analyzing the NDA adsorbed in the activated carbon, it is converted into amino (-NH 2 ) is 7.8 mol in moles, and then heated up to 85-90°C for 2 hours to react. After the reaction, cool down to room temperature and filter. The filtrate is collected and distilled to recover butyl acetate. The recovered butyl acetate can be reused in production, and the filter cake is sampled Detection does not contain amino groups (-NH 2 ) and isocy...

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Abstract

The present invention discloses a soil improver prepared by carrying out recovery treatment on industrial active carbon, a preparation method and applications thereof. The preparation method comprises: uniformly mixing amine industry recovery active carbon and isocyanate industry recovery active carbon in a solvent, carrying out a reaction for 1-20 h at a temperature of 20-100 DEG C, cooling, and filtering; after the filtering, carrying out distillation, condensation and other recovery reutilization on the filtrate; and conveying the filter cake to an improver mixing device, and completely mixing with soil and nutriments to prepare the soil improver, wherein the soil improver is applied. According to the present invention, the treatment method is simple, efficient, safe and clean; the recovered solvent after the treatment can be reused, the treated active carbon has good moisture absorption, good moisture retention and whole gas permeability, the mechanical strength is increased, and the soil improver is prepared; and with the method, the problems of difficult industrial recovery active carbon treatment and easy environmental pollution generation are solved, the waste is turned into treasure, the comprehensive utilization is achieved, and the reference is provided for the treatment of other types of industrial recovery active carbon.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, and in particular relates to a kind of industrial activated carbon recycling and processing for preparing soil conditioner, a preparation method and application. Background technique [0002] Activated carbon is an auxiliary agent often used in the chemical industry. It can be used as decolorization, adsorption, catalyst carrier, etc. After use, except for individual processes that can be recycled, activated carbon is basically incinerated as solid waste. Due to the Many recycled activated carbons contain toxic and harmful substances, which cannot be simply burned. [0003] Some organic amine synthesis industries use activated carbon for decolorization treatment. The filtered activated carbon contains organic amine components, and most organic amines are toxic and harmful substances. Therefore, this kind of industrial recycled activated carbon cannot be simply buried. It is easy to cause ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 杨申钟文清陈南超李金木
Owner 山东崇舜新材料科技有限公司