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Industrial preparation method of iron oxide-loaded cation resin base composite adsorbent

A cationic resin and composite adsorption technology, applied in chemical instruments and methods, adsorption water/sewage treatment, ion exchange water/sewage treatment, etc., can solve the problems of high economic cost, achieve uniform mass transfer, save procedures and costs, and be reasonable Arranging the effects of production steps

Active Publication Date: 2018-01-05
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that this patent uses ferrate as a precursor, and prepares iron oxide particles after reduction; this patent uses redox reaction, and its economic cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An industrial preparation method of a cationic resin-based iron oxide composite adsorbent, comprising the following specific steps:

[0032] (A) First, add the commercially available macroporous cation exchange resin D001 type resin raw material into the filter car, add 2 tons of resin in each batch, add about 2 tons of clear water, stir intermittently at 20-45 °C, and let it stand for 1 hour. Filter out the clear water, and the filtered water can be reused; then transfer the resin to a vacuum dryer, use a water bath to heat to 30-60°C, while maintaining a vacuum of 0.05-0.2MPa, when the moisture content drops to 15-30 % after unloading, get washed D001 type resin.

[0033] Add 1-2t anhydrous FeCl to the 6000L reactor 3 (commercially available) and 10% hydrochloric acid, prepared into 3000L FeCl 3 solution, wherein the equivalent iron weight content is 5-12%, and the acidity is 3-4%,

[0034] Add the D001 type resin after washing and drying pretreatment in batches to...

Embodiment 2

[0041] Test methods for physical and chemical indicators and application performance of cationic resin-based iron oxide-supported composite adsorbent products

[0042] 1. Appearance

[0043] Carry out with the method of visual inspection, the appearance of product of the present invention is wet shape reddish-brown spherical particle, without the visible mechanical impurity of normal eyesight.

[0044] 2. Physical and chemical indicators

[0045] 2.1 Sample pretreatment: Wash the sample repeatedly with deionized water until the effluent is clear and transparent, and the pH is neutral.

[0046] 2.2 Nanoparticles are processed according to the method specified in JY / T 011-1996:

[0047] Nanoparticles (calculated as ≤100nm), ≥20%.

[0048] 2.3 The mass fraction of iron content is pretreated according to the microwave digestion method stipulated in HJ / T0166-2004, and then the sample is measured according to the method stipulated in GB / T 11911-1989:

[0049] The mass fraction o...

Embodiment 3

[0064] An industrial preparation method of a cationic resin-based iron oxide composite adsorbent, comprising the following contents:

[0065] (A) Add the prepared iron salt solution in batches through the washed and dried pretreated acidic cationic resin under stirring, the iron salt solution is FeCl 3 solution, wherein the equivalent iron weight content is 5-12% (in specific applications, it can be 5%, 12%, 8%, 10%, 11%, etc.), and the acidity is 3-4% (in specific applications, it can be 3 %, 4%, 3.2%, 3.5%, 3.8%, etc.), the speed of adding in batches is controlled within 15min to be no more than 1 / 10 of the resin addition, at 10-35°C (in specific applications, it can be 10 ℃, 35°C, 20°C, 25°C, 30°C, etc.) under continuous stirring for 0.5-4h (in specific applications, it can be 0.5h, 4h, 1h, 2h, 2h, 2.5h, etc.);

[0066] (B) filter to obtain cationic resin-based loaded Fe 3+ Composite intermediate, the ferric salt mother liquor that reclaims leach, in next batch of product...

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Abstract

The invention discloses an industrial preparation method of an iron oxide-loaded cation resin base composite adsorbent, and belongs to the industrial production field of composite resin adsorbents forwaste water treatment. The preparation comprises the following steps: (A) acidic cation resin is added into a ferric salt solution in batch with stirring; (B) filtering is carried out, and filtrate is recycled and reused in the step (A); (C) vacuum hot air and drying are carried out for a Fe3+ composite intermediate loaded cation resin base; (D) the material obtained in the step (C) is added intoa sodium hydroxide solution in batch for carrying out a reaction, and filtering is carried out; (E) hydrochloric acid is added into the solid obtained in the step (D) for adjusting the pH value, andfiltering is carried out; (F) filtered solids obtained in the step (E) are washed with water, and water is filtered and dried. In the industrial preparation method of the iron oxide-loaded cation resin base composite adsorbent, ferric salt solution, alkali solution, acid solution and other materials can be recycled and reused, production cost and environment pollution can be greatly reduced, the method accords with national energy saving and emission reduction industrial policy at present, and the method is suitable for industrial promotion.

Description

technical field [0001] The invention belongs to the field of industrial production of composite resin adsorbents for waste water treatment, and relates to an industrial preparation method of a composite adsorbent loaded with iron oxide using cation exchange resin as a carrier, in particular to a recyclable and mechanically applicable reaction material The invention discloses an industrial preparation method of a cationic resin-based iron oxide-loaded composite adsorbent. Background technique [0002] With the development of industry and mining and the acceleration of urbanization, the waste water produced in the process of heavy metal mining, smelting, processing, electroplating, tanning, etc., as well as the domestic sewage directly discharged without proper treatment, have caused heavy metal pollution in rivers, lakes and other water bodies. pollute. The heavy metals include copper, lead, nickel, cadmium, chromium, mercury, and arsenic. Even if the concentration is small...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/42C02F101/20
Inventor 张炜铭潘丙才吕路张孝林赵昕花铭张延杨单超
Owner NANJING UNIV
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