Method for preparing liquid antibacterial agent containing complex silver
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An antibacterial agent, a technology of complexing silver, applied in the field of antibacterial agents, can solve the problems of discoloration and white precipitation.
Inactive Publication Date: 2010-12-29
SHANGHAI LIULI NANO MATERIAL SCI & TECH
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Chinese Patent Publication No. CN1149389 discloses a silver-containing liquid fungicide and a preparation method thereof. Silver nitrate and sodium hydroxide are stirred for a certain period of time in a certain proportion to obtain dark brown precipitates, which are filtered, washed, and dried to obtain Silver oxide; dissolve this silver oxide in deionized water containing a certain amount of persulf
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Embodiment 1
[0019] 1. Preparation of primary silver solution
[0020] ① Dissolve 0.024moL silver nitrate in 100mL deionized water, dissolve 0.9moL sodium chloride in 100mL deionized water, slowly add the dissolved silver nitrate solution to the sodium chloride aqueous solution, and stir while adding , the dropping process is 30 minutes, after dropping, add 10ml of 1mol / L aqueous sodium hydroxide solution wherein, the normal reaction temperature is room temperature, after the reaction is completed, filter and wash, and reclaim the silver-containing filter residue for use.
[0021] ②Weigh 8g of potassium persulfate and dissolve it in 400mL of water, add the filter residue in the recovered step ① into the above solution, heat and stir for reaction, the reaction temperature is 60°C, and the time is 2 hours. After the reaction is completed, cool to room temperature for use.
[0022] 2. Preparation of complexed silver solution
[0023] Scheme ① Dissolve 3g of sodium thiosulfate and 1.5g of sod...
Embodiment 2
[0030] 1. Preparation of primary silver solution
[0031] ① Dissolve 0.04moL silver nitrate in 100mL deionized water, dissolve 1.6moL sodium chloride in 100mL deionized water, slowly add the dissolved silver nitrate solution to the sodium chloride aqueous solution, and stir while adding , the dropping process is 30 minutes, after dropping, add 1mol / L sodium hydroxide aqueous solution 20ml wherein, the normal reaction temperature is room temperature, after the reaction is completed, filter and wash, reclaim the silver-containing filter residue for use.
[0032] ②Weigh 20g of sodium persulfate and dissolve it in 400mL of water, add the filter residue in the recovery step ① into the above solution, heat and stir for reaction, the reaction temperature is 60°C, and the time is 2 hours. After the reaction is completed, cool to room temperature for use.
[0033] 2. Preparation of complexed silver solution
[0034] ① Dissolve 6g of sodium thiosulfate and 3g of sodium hexametaphosphat...
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Abstract
The invention relates to a method for preparing a liquid antibacterial agent containing complex silver. Silver nitrate is used as a raw material. The method comprises the following steps of: preparing silver-containing filter residue from the silver nitrate, sodium chloride and sodium hydroxide, reacting the washed and filtered silver-containing filter residue and persulfate to obtain silver-containing initial solution, complexing the silver-containing initial solution, thiosulfate and phosphate, and adjusting the pH of the solution by using sodium carbonate and sodium silicate to obtain the liquid antibacterial agent containing the complex silver. The method has the advantages that: the antibacterial agent can be used after being diluted by using tap water, and can be mixed with most liquids containing negative ions, positive ions and nonionic surface active components for use; and in particular, the liquid antibacterial agent with halogen-containing ion solution stability has the properties of strong discoloration resistance, wide practicability, washing tolerance (the washing frequency is more than 50 times) and the like on fabric after-finish.
Description
【Technical field】 [0001] The invention relates to the technical field of antibacterial agents, in particular to a method for preparing a liquid antibacterial agent containing complexed silver. 【Background technique】 [0002] There are many kinds of silver-containing liquid antibacterial agents, such as those reported to be mostly composed of nano-silver particles reduced by polymer-protected reducing agents, such as using PVP and PVA as protective agents, using methanol, ethanol, etc. The nano-silver particles made by reducing agent have a certain color; most of the complexed silver antibacterial agents are organic amines containing amino groups as complexing stabilizers, and the color is colorless and transparent, but the smell of ammonia is strong, so long-term storage There will be flocs; then there is a high-priced silver ion liquid fungicide. Chinese Patent Publication No. CN1149389 discloses a silver-containing liquid fungicide and a preparation method thereof. Silver...
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