Hyperbranched multiamino compound modified rice straw cellulose adsorbent and preparation method thereof

A technology of polyamino compounds and rice straw, applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems such as environmental and biological hazards, high cost, and application restrictions, and achieve No secondary pollution, light material and convenient operation

Active Publication Date: 2018-02-23
WUHU CHUANGYUAN NEW MATERIALS CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

The chemical precipitation method mainly uses limestone-type alkaline substances to precipitate and separate heavy metal ions, but the heavy metal ions separated from the water body are precipitated into the mud at the bottom of the river, which still causes harm to the environment and organisms; activated carbon adsorption method and ion The exchange method can separate heavy metals from water well, but its cost is too high and its application is limited

Method used

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Experimental program
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Effect test

Embodiment Construction

[0017] The rice straw cellulose adsorbent modified by hyperbranched polyamino compounds of this embodiment is prepared by the following specific steps:

[0018] (1) Wash the rice straw with tap water, dry it at 60°C at low temperature, pulverize it with a pulverizer, pass through a 40-mesh sieve, and dry it at 60°C at a low temperature to obtain rice straw powder for later use; put the rice straw powder at a steam explosion pressure of 2.6MPa Under the conditions of steam explosion, the pressure holding time is 100s, and it is dried in a vacuum oven at 70°C; the rice straw after steam explosion is extracted 3 times with 5 times the weight of deionized water at 80°C each time, and filtered; 6 times by weight of 75% ethanol aqueous solution was reacted at 160°C for 80 minutes, filtered, dried in a vacuum oven at 60°C, pulverized and sieved to obtain 200-mesh granules and rice straw cellulose;

[0019] (2) Put the rice straw cellulose in 18 times the weight of deionized water, mi...

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Abstract

The invention relates to a hyperbranched multiamino compound modified rice straw cellulose adsorbent. A preparation method of the hyperbranched multiamino compound modified rice straw cellulose adsorbent is characterized by comprising the following steps: firstly preparing rice straw cellulose by smashing, blasting with steam, extracting with hot water and carrying out alcohol dissolving; secondly, carrying out reaction on the rice straw cellulose and epoxy chloropropane, so that epoxidized cellulose is obtained; then carrying out reaction on the epoxidized cellulose and a hyperbranched multiamino compound, so that amino modified cellulose is obtained; and finally compounding the amino modified cellulose and sodium alginate in ionic liquid, so that the hyperbranched multiamino compound modified rice straw cellulose adsorbent is obtained. The preparation method provided by the invention has relatively mild conditions, is simple in technology, easy in operation and easy in mass production, has a good industrialized popularization prospect, has strong heavy metal adsorbing capability and can be applied to the field of treatment of heavy metal ion wastewater and organic wastewater.

Description

technical field [0001] The invention belongs to the field of adsorbents, in particular to a rice straw cellulose adsorbent modified by hyperbranched polyamino compounds and a preparation method thereof. Background technique [0002] With the continuous acceleration of China's industrialization, more and more industries are involved in heavy metal emissions, including mining, metal smelting, chemical industry, printing and dyeing, leather, pesticides, feed, etc. In addition, some polluting enterprises have illegal mining and excessive sewage discharge. Prominent, so heavy metal pollution incidents appear high incidence trend. Water pollution caused by unreasonable discharge of industrial wastewater has always been a serious environmental problem. Heavy metal ions are highly toxic at low concentrations and can accumulate in biological organisms, causing a series of disorders and diseases. Therefore, the separation and removal of heavy metal ions from industrial wastewater pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/24B01J20/28011B01J20/2808C02F1/286C02F2101/20
Inventor 高恒东胡佳佳
Owner WUHU CHUANGYUAN NEW MATERIALS CO LTD
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