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Preparation method of nano selenium sol

A technology of nano-selenium and sol, which is applied in the direction of elemental selenium/tellurium, etc., can solve problems such as the inability to study the physiological and pharmacological effects of nano-selenium, and achieve the effects of easy implementation, narrow distribution, and simple and easy methods

Inactive Publication Date: 2007-07-04
NINGBO UNIV
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Problems solved by technology

If nano-selenium with a wide particle size distribution and an uncertain shape obtained by various existing technologies is used as a raw material, it is impossible to conduct in-depth research on the physiological and pharmacological effects of nano-selenium

Method used

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  • Preparation method of nano selenium sol

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Embodiment Construction

[0014] The present invention is described in further detail below in conjunction with embodiment example:

[0015] Implementation example 1

[0016] Get 100ml of 0.1wt% selenous acid aqueous solution, add 1.0wt% polyvinylpyrrolidone (PVP) protective agent aqueous solution 30.0ml, place the mixed solution on a magnetic stirrer and stir for 10-20 minutes, then put the ultrasonic in-line processor Insert it into the solution in the beaker. The transmitting end of the ultrasonic in-line processor is about 5 mm away from the bottom of the beaker. The diameter of the end face of the transmitting end is 10-20 mm. , the ultrasonic wave is turned on for 6-10 seconds, and the frequency is 60-100 times, so that the ultrasonic processor works intermittently, and a pulsed ultrasonic field is applied to the solution. After the ultrasonic in-line processor is started, the reducing agent solution is added dropwise. 10-20ml of wt% hydroxylamine hydrochloride aqueous solution, after adding the...

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Abstract

A method for preparing nano selenium dispersoid, comprising the followaing steps: preparing selenious acid solution or selenite solution with concentration being 0.08-0.12 wt%, adding protective agent with concentration being 0.8-1.2wt%, with the volumetric ratio being 1.0:0.2-0.4, inserting the probe of the supersonic wave treating unit into the stirred solution, making the supersonic wave treating unit working in intermittent way, applying pulse supersonic wave field to the solution and adding reductant liquid with the concentratioin being 0.8-1.2 wt%, with the adding amount of 1.0:0.1-0.2 by taking the volume of the selenious acid or selenite solution as reference, the temperature of the reaction product is about 50-60 Deg C, pH is 3.2-6.8, nano selenium dispersoid of uniform particle size and in spherical shape can be got by regulating the pulse parameter of the supersonic wave and the concentration and volume of the reactant.

Description

technical field [0001] The invention relates to the technical field of a preparation method of nano selenium sol. Background technique [0002] The invention of Chinese patent 97107038.5 discloses a preparation method of active red elemental selenium. After the identification of the national authority and the scientific review of medical experts, the identification of nano-selenium is the first at home and abroad. Shanghai Sitong Nano Technology Port Co., Ltd. has applied this patented technology to produce Sewang Capsules since May 2000. According to the company's website http: / / www.nano-port.net / company.htm According to the published technical data, as determined by the National Center for Microanalysis and Structure, the particle radius of nano-selenium particles is distributed in the range of 20 to 60 nanometers, and the average particle diameter is 36 nanometers. , the reducing agent used is vitamin C or mercaptoethanol. Since then, there have been several patent pub...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02
Inventor 任元龙水淼周星飞周湘池浦炳寅
Owner NINGBO UNIV