Preparation method of hydrated sodium antibacterial agent

An antibacterial agent and hydration technology, which is applied in the field of preparation of hydrated silicon antibacterial agent, can solve the problems of only 96% antibacterial rate, discoloration preparation process, strict production process, etc., achieve excellent sterilization and antibacterial properties, wide source of raw materials, and good processability Effect

Inactive Publication Date: 2012-08-15
ZHEJIANG JIANYE CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although inorganic silver ion antibacterial agents such as fluorspar and phosphate as carriers have strong antibacterial ability, there are problems such as discoloration, complicated preparation process and high production cost in both powders.
There are also patents using white carbon black processed from rice husks as the antibacterial white carbon black of the carrier, such as "antibacterial white carbon black and its preparation method" such as Platinum Peak, although it has wear resistance, reinforcement, compatibility and Machinability, but the production process is strict, the calcination temperature is 650-780 ℃, high energy consumption, unstable quality, limited use, and the antibacterial rate is only 96%

Method used

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  • Preparation method of hydrated sodium antibacterial agent
  • Preparation method of hydrated sodium antibacterial agent
  • Preparation method of hydrated sodium antibacterial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1, a kind of preparation method of hydrated silicon antibacterial agent, comprises the following steps:

[0057] 1), carrier preparation, carry out the following steps successively:

[0058] ①, raw material preparation:

[0059] Water glass and sulfuric acid were prepared with soft water into dilute water glass with a concentration of 2M and dilute sulfuric acid with a concentration of 0.8M respectively for use.

[0060] ②, synthetic preparation:

[0061] Add 210ml of the above-mentioned dilute water glass to the 1-liter reaction kettle, raise the temperature to 30°C, start stirring (stirring is subject to full mixing of the materials, and the stirring speed is 300r / min), constant stirring is controlled, according to the total amount of dilute sulfuric acid. The volume ratio of the amount and the dilute water glass is 1: 1.8, so that the added amount of dilute sulfuric acid is calculated to be 116.7ml; start the dilute sulfuric acid that the above-mentioned...

Embodiment 2

[0075] Embodiment 2, a kind of preparation method of hydrated silicon antibacterial agent,

[0076] In step ① of step 1): change the concentration of dilute water glass to 1.35M, and change the concentration of dilute sulfuric acid to 0.6M; in step ②: change the volume ratio of acid and alkali to 1:1.2; add acid three times speed remains unchanged. Therefore, the first acid addition time is about 35 minutes, the second acid addition time is about 15 minutes, and the third acid addition time is about 63 minutes, for a total of 113 minutes.

[0077] In step 2): change the molar ratio of silver nitrate to silica (hydrated silicon) in the slurry to: 1:28.5;

[0078] The rest are the same as in Example 1.

[0079] The hydrated silicon antibacterial agent has been tested and the performance data are as follows:

[0080] Appearance whiteness: 90, SiO 2 : 95.5%, silver ion content is 3.6%, specific surface area is 180m 2 / g, the oil absorption rate DBP is 338ml / 100g, the dispersi...

Embodiment 3

[0081] Embodiment 3: a kind of preparation method of hydrated silicon antibacterial agent,

[0082] In step ① of step 1): change the concentration of dilute water glass to 1.35M, and change the concentration of dilute sulfuric acid to 0.6M; in step ②: change the volume ratio of acid and alkali to 1:1.6; add acid three times speed remains unchanged. Therefore, the first acid addition time is about 26 minutes, the second acid addition time is about 11 minutes, and the third acid addition time is about 47 minutes, for a total of 84 minutes.

[0083] In step 3., be warming up to 98 ℃ constant, add the dilute sulfuric acid that concentration is 0.6M to carry out post-acidification treatment, stop adding above-mentioned dilute sulfuric acid until the pH of solution is 2.5; Then at 98 ℃ of stirring and aging 20min;

[0084] In step 2):

[0085] Change the molar ratio of silver nitrate to silicon dioxide (hydrated silicon) in the slurry: 1:38;

[0086] The rest are the same as in E...

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Abstract

The invention discloses a preparation method of a hydrated sodium antibacterial agent. The preparation method comprises the following steps of: preparing a carrier: taking dilute sulfuric acid with the concentration being 0.1-1 M and diluted sodium silicate with the concentration being 0.5-2 M as raw materials; continuously adding the dilute sulfuric acid into the diluted sodium silicate by three times to carry out neutralization reaction; raising the temperature of the materials and carrying out post-acidifying and ageing on the materials; washing a product to obtain a wet filter cake; loading the carrier and ageing: pulping the wet filter cake to obtain slurry; adding an antibacterial metal ion solution into the slurry; and after adding the antibacterial metal ion solution, keeping the heat and ageing for 10-30 min; and sequentially filtering, drying and crushing the product to obtain the hydrated sodium antibacterial agent. The hydrated sodium antibacterial agent prepared by the method has excellent sterilizing and antibacterial properties.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly inorganic antibacterial agent, in particular to a preparation method of a hydrated silicon antibacterial agent. Background technique [0002] Antibacterial agents are a class of chemical substances that can keep the growth or reproduction of microorganisms (bacteria) below the necessary level for a certain period of time. Chemical products and other fields. In recent years, the application of antibacterial products has been popular in Europe, the United States and Japan. my country started late, but the pace of research and development is getting faster and faster. As of 2011, my country's antibacterial industry has grown into a new industry with an annual output value of 70 billion yuan in just a few years. [0003] The inorganic antibacterial agents reported so far are based on fluorspar, calcium phosphate, copper phosphate, porous metal, soluble glass, silica gel and activat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N59/20A01N25/08A01P1/00
Inventor 陈云斌强林萍冯烈曹伟富邱昌福
Owner ZHEJIANG JIANYE CHEM
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