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Method for preparing manganese polysilicate doped manganese dioxide adsorbent

A polymanganese silicate and manganese dioxide technology, applied in chemical instruments and methods, silicon compounds, adsorbed water/sewage treatment, etc., can solve the problems of poor sedimentation, poor dimethylamine removal ability, etc., and achieve high self-stability , easy to recycle, the effect of the method is simple

Inactive Publication Date: 2012-03-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and application of polysilicate manganese salt doped manganese dioxide adsorbent in order to solve the problems of poor removal ability and poor settling property of manganese dioxide to dimethylamine

Method used

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  • Method for preparing manganese polysilicate doped manganese dioxide adsorbent
  • Method for preparing manganese polysilicate doped manganese dioxide adsorbent

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specific Embodiment approach 1

[0010] Specific embodiment one: the preparation method of polysilicate manganese salt doped manganese dioxide adsorbent in the present embodiment is as follows: one, according to potassium permanganate and sodium salt molar ratio is the ratio of 1.6~4:1, with 100r / Add the potassium permanganate solution dropwise into the sodium salt solution while stirring at a stirring speed of 100r / min to 300r / min, and then continue stirring for 30min at a stirring speed of 100r / min to 300r / min to obtain product A; The mass ratio of silicate to silicate is 1:1. Add silicate to product A, settle for 10min~30min, activate at 40℃~60℃ for 24h~48h, then remove the upper layer of clear solution, use Wash the precipitate with deionized water until the pH of the washing solution is 8-10, and then dry the precipitate at 60°C to obtain product B; 3. Add deionized water to product B until product B is cracked into granules, Then wash with deionized water several times to remove suspended matter, and t...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that the molar ratio of potassium permanganate to sodium salt in step 1 is 2-3:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the molar ratio of potassium permanganate to sodium salt in step 1 is 2.5:1. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a manganese polysilicate doped manganese dioxide adsorbent, which relates to a method for preparing an adsorbent and application thereof. The method solves the problems that manganese dioxide has poor removal capacity and poor settleability to dimethylamine. The method for preparing the manganese polysilicate doped manganese dioxide adsorbent comprises the following steps of: firstly, preparing a product A; secondly, preparing a product B; and thirdly, adding deionized water into the product B until the product B is pyrolyzed into particles, then removing suspended matters, and drying the particles to obtain the manganese polysilicate doped manganese dioxide adsorbent. The manganese polysilicate doped manganese dioxide adsorbent is applied to water treatments to remove the dimethylamine in water. The adsorbent prepared by the method is an amorphous crystal, and the specific surface area of the adsorbent is 152.79 m<2> / g which is 3 times that of commercially available manganese dioxide. The manganese polysilicate doped manganese dioxide adsorbent can effectively remove the dimethylamine in the water, and has the characteristics of high self stability, simple and convenient method, no need of high-temperature drying, easy recycling and no generation of secondary pollutions.

Description

technical field [0001] The invention relates to a preparation method and application of an adsorbent. Background technique [0002] Dimethylamine is the most direct precursor of nitrosodimethylamine, a simple short-chain aliphatic amine, which often exists in trace amounts in environmental samples, biological fluids and industrial waste. At normal temperature and pressure, dimethylamine is a colorless gas that is harmful to human health. Ozone and other advanced oxidation methods can remove dimethylamine, but these treatments can lead to the formation of certain amounts of nitrosodimethylamine. [0003] Natural manganese ore, which uses manganese dioxide as the main component, can be used to adsorb and remove heavy metals and organic substances in water. The catalytic and adsorption capabilities of synthetic manganese oxides can remove arsenic, pesticide atrazine, organic dyes, etc. in water. At present, the new ecological manganese dioxide has gradually become a hot spot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28
Inventor 陈忠林杨磊刘玥韩莹刘宇张冬梅
Owner HARBIN INST OF TECH
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