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Method for separating and extracting shell pieces and clitellum from kieselguhr or diatoms

A diatomaceous earth and diatom technology, applied in the direction of silicon oxide, silicon dioxide, etc., can solve the problems of no adsorption capacity and small specific surface area, and achieve the effect of easy operation

Inactive Publication Date: 2010-08-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing research often does not treat the shell pieces and the annulus differently, thus affecting the research and application effects. For example, diatomite adsorbents and filter aids are often processed with the main component of circular sieve algae diatomite. There is a part of the circular belt of sieve algae in the soil. There is no pore system in the ring belt, the specific surface area is small, and there is basically no adsorption capacity, but it accounts for about 15% of the mass of the product, which can be completely removed.
On the other hand, there is almost no research on the application of the ring zone at home and abroad, and the outer diameter of the ring zone covers 1 μm to 100 μm. The shape and size are similar to some existing optical and communication micro-devices, such as the focusing zone plate of the X-ray microscope. , fiber optic microring resonators, etc., it can be seen that the rings may not be useless, but there is no effective way to extract a large number of rings

Method used

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  • Method for separating and extracting shell pieces and clitellum from kieselguhr or diatoms
  • Method for separating and extracting shell pieces and clitellum from kieselguhr or diatoms
  • Method for separating and extracting shell pieces and clitellum from kieselguhr or diatoms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1 Separation and extraction of round sieve frustules and rings from C292 type diatomite

[0079] Use Guangdong Shantou to produce C292 type diatomite (its appearance is as follows figure 1 As shown), the particle size is 20 mesh, and its raw materials are all soil ore formed by the remains of diatoms, and the organic matter has long been decomposed.

[0080] 1. Pretreatment of C292 diatomite

[0081] Put the C292 type diatomite into a glass container, add absolute ethanol with a mass percentage concentration of 95%, and ultrasonically clean it for 30 minutes under the conditions of a power of 800W and a working frequency of 25KHz, and then use a filter cloth with a pore size of 20μm for separation. The upper layer of the filter cloth is the silicon shell;

[0082] Dosage: Add 100ml of absolute ethanol to 1g of diatomaceous earth.

[0083] In the present invention, a microscope can be used to observe that the siliceous shell is a silicate shell of the sieve ...

Embodiment 2

[0094] Example 2 Separation and extraction of round sieve shells and rings from straight-chain algae diatomite in Shengzhou, Zhejiang

[0095] Use Zhejiang Shengzhou linear algae diatomite (its shape is as follows figure 2 As shown), the particle size is 200 mesh, and its raw materials are all soil ore formed by the remains of diatoms, and the organic matter has long been decomposed.

[0096] 1. Pretreatment of linear algae diatomite in Shengzhou, Zhejiang

[0097] Put Zhejiang Shengzhou straight-chain algae diatomite into a glass container, add absolute ethanol with a mass percentage concentration of 95%, and place the glass container in an ultrasonic cleaning machine for ultrasonic cleaning at a power of 1000W and a working frequency of 40KHz After 15 minutes, use a filter cloth with a pore size of 10 μm for separation, and the upper layer of the filter cloth is the siliceous shell;

[0098] Dosage: Add 80ml of absolute ethanol to 1g of diatomaceous earth.

[0099] In th...

Embodiment 3

[0112] Example 3 Isolation and Extraction of Sclera and Rings from Bentia basilis

[0113] 1. Diatom inactivation and removal of organic matter treatment steps

[0114] (A) the bent algae (such as image 3 Shown) put into the sulfuric acid that mass percent concentration is 70% and mix to obtain diatom suspension;

[0115] Dosage: Add 50ml of sulfuric acid to 1g of algae;

[0116] (B) putting the diatom suspension into a centrifuge after being incubated at a temperature of 90° C. for 40 minutes; centrifuging at a speed of 6000 r / min for 15 minutes, taking it out, and removing the supernatant to obtain the first mixture;

[0117] (C) adding deionized water to the first mixture, centrifuging at a speed of 6000r / min for 8min, taking it out, removing the supernatant to obtain the second mixture;

[0118] Dosage: Add 40ml of deionized water to 10ml of the first mixture;

[0119] (D) adding deionized water to the second mixture, centrifuging at a speed of 6000r / min for 8min, t...

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Abstract

The invention discloses a method for separating and extracting shell pieces and clitellum from kieselguhr or diatoms. The method comprises the following steps of: classifying and extracting the shell pieces and the clitellum by adopting a Stokes sedimentation method in the extraction process; calculating the sedimentation velocity difference between the shell pieces and the clitellum with same particle diameters by combining with a fluid dynamics theory; and carrying out sedimentation by adding deionized water a plurality of times to finish high-purity classification and extraction of the shell pieces and the clitellum. The method can not damage structures of the shell pieces and the clitellum and keep the topography and the microstructure of the original species of diatoms, and the shell pieces and the clitellum are only separated at connecting strips. 0.2 to 0.6g of shell pieces and 0.1 to 0.3g of clitellum can be extracted from 1g of siliceous shells.

Description

technical field [0001] The invention relates to a method for extracting microbial structures, more particularly, refers to a method for separating and extracting shell pieces and annulus from diatomite and diatoms as raw materials. Background technique [0002] Diatomaceous earth is formed from the silicate remains after the death of single-cell algae of diatoms, and its composition is aqueous amorphous SiO 2 . Diatomaceous earth has various shapes, unique shell structure, large specific surface area, high porosity, low density, high temperature resistance and other excellent properties, and it has a wide range of sources and low price. At the beginning of the last century, diatomite mines were exploited in large quantities and widely used in industry, and high-yield products such as diatomite adsorbents, filter aids, thermal insulation materials, and sound insulation materials were developed. The proven reserves of diatomite in my country ranks second in the world, and th...

Claims

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Application Information

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IPC IPC(8): C01B33/12
Inventor 张德远蔡军王瑜潘骏峰连志阳
Owner BEIHANG UNIV
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