Preparation method of modified lignin absorbent for absorbing TNT (Trinitrotoluene)

A technology of lignin and adsorbent, applied in the field of preparation of lignin derivatives, can solve the problems of difficult post-processing, low reuse rate, damage to the blood circulation system and nervous system, etc., achieves high adsorption selective adsorption capacity, overcomes the Poor adsorption selectivity and the effect of saving oil resources
CN101829546BInactive Publication Date: 2012-02-22SOUTHWEAT UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEAT UNIV OF SCI & TECH
Publication Date
2012-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a modified lignin absorbent for absorbing TNT (Trinitrotoluene), which is characterized by comprising the steps of: adding 5-30 parts by weight of lignin into 150-500 parts by weight of 1,2-alkyl dihalide, adding 15-50 parts of catalysts, stirring for 3-10 hours at 50-90 DEG C, washing reacted materials by using a mixture of ice and diluted hydrochloric acid, filtering and washing by using water, and drying to prepare grafted halogenated lignin; and then adding 50-300 parts of aminating agents into 20-80 parts of organic solvents, adding 5-30 parts of the grafted halogenated lignin, stirring for 4-10 hours at 60-90 EG C, filtering, washing by using diluted ammonia water and water, and drying to obtain the modified lignin absorbent. The absorbent has higher selective absorption capacity on the TNT and other organic compounds containing nitryl and can be used for absorption and separation of the TNT and other organic compounds containing the nitryl in the explosive industrial wastewater so as to protect the environment.
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Description

technical field

[0001] The invention belongs to a preparation method of lignin derivatives, and relates to a preparation method of a modified lignin adsorbent used for adsorbing TNT. The prepared modified lignin adsorbent is especially suitable for adsorption and purification treatment of TNT-containing wastewater, so as to protect the environment and human health. Background technique

[0002] TNT (ie: 2,4,6-trinitrotoluene; trinitrotoluene; TNT) is one of the most widely used explosives in the world. TNT is widely used in military and civilian applications because of its easy-to-obtain raw materials, relatively safe operation, relatively stable physical and chemical properties, good explosive performance, and low cost. Its consumption and output rank first in the world.

[0003] However, TNT is also a toxic, carcinogenic and mutagenic substance. During the production and refining process of TNT, a large amount of explosive wastewater with complex components, high toxicit...

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
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