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Collagen-inorganic metal salt flocculating agent and preparation method thereof

A technology of inorganic metal salt and collagen, which is applied in the field of protein flocculant and its preparation, can solve the problems of high cost and large dosage, and achieve the effect of low cost, low toxicity and increased molecular size

Inactive Publication Date: 2013-07-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is also because of the low molecular weight of the collagen used as the matrix, so the final flocculant needs to be used in a large amount (20g / L) in order to obtain a better flocculation effect, and the use cost is obviously higher

Method used

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  • Collagen-inorganic metal salt flocculating agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] First add 100 parts of hydrolyzed collagen with a relative molecular weight of 2000-5000Da to 600 parts of water and stir to dissolve, then dissolve 1 part of formaldehyde in water, heat at 30°C for 0.5h, add collagen aqueous solution, and stir at 30°C React for 4 hours, and obtain cross-linked collagen after cooling; add 150 parts of aluminum sulfate to the obtained 100 parts of cross-linked collagen, adjust the pH to 2.5, and stir and react at 50°C for 2 hours, and obtain liquid form after cooling Collagen flocculant.

[0030] The molecular weight distribution of the cross-linked collagen obtained in this example is 8000-35000 Da, and the flocculation efficiency of the obtained flocculant is 0.8572.

Embodiment 2

[0032] First, add 100 parts of hydrolyzed collagen with a relative molecular weight of 6000-8000Da to 700 parts of water and stir to dissolve, then dissolve 15 parts of glutaraldehyde in water, and heat it at 50°C for 1.5h, then add it to the aqueous collagen solution, at 50 Stir and react at ℃ for 4 hours, and obtain cross-linked collagen after cooling; add 100 parts of ferric sulfate to the obtained 100 parts of cross-linked collagen, adjust the pH to 3.0, and stir and react at 30 °C for 4 hours, and obtain liquid after cooling Collagen flocculant.

[0033] The molecular weight distribution of the cross-linked collagen obtained in this example is 12000-68000 Da, and the flocculation efficiency of the obtained flocculant is 0.9536.

Embodiment 3

[0035]First, add 100 parts of hydrolyzed collagen with a relative molecular weight of 3000-6000Da extracted from chromium-containing waste skin slag by the method disclosed in Patent Application No. 201210536906.6 into 500 parts of water and stir to dissolve, then dissolve 3 parts of glutaraldehyde in water , and heated at 30°C for 1.0h, added to the collagen aqueous solution, stirred and reacted at 30°C for 5h, and obtained cross-linked collagen after cooling; adding 50 parts of aluminum sulfate to the obtained 100 parts of cross-linked collagen, The pH was adjusted to 3.0, and stirred and reacted at 30° C. for 3 hours, and a liquid collagen flocculant was obtained after cooling.

[0036] The molecular weight distribution of the cross-linked collagen obtained in this example is 10000-45000 Da, and the flocculation efficiency of the obtained flocculant is 0.8849.

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Abstract

The invention discloses a collagen-inorganic metal salt flocculating agent and a preparation method thereof. The preparation method comprises the following steps of: adding electrolysis collagen in water, stirring and dissolving, heating a cross-linking agent dissolved in water, stirring and reacting, and cooling to obtain cross-linked collagen; and adding an inorganic metal salt in the cross-linked collagen, regulating pH, and stirring and reacting to obtain the collagen-inorganic metal salt flocculating agent. The flocculating agent is viscous liquid or powder which is lightly yellow in color and appearance and is free from smell, relative molecular weight distribution of the cross-linked collagen is 8000-68000Da, and flocculating efficiency of kaolin is 0.8472-0.9536. The preparation method disclosed by the invention, on the basis of cross linking electrolysis collagen which is low in molecular weight through the cross-linking agent and compositing the inorganic metal salt, not only improves flocculating efficiency, but also reduces use cost; and the preparation method is simple and easy to prepare, strong in operability, and easy to industrially produce.

Description

technical field [0001] The invention belongs to the technical field of protein flocculant and its preparation, in particular to a collagen flocculant obtained by cross-linking collagen and compounding inorganic metal salts and a preparation method thereof. Background technique [0002] At present, in the commonly used water treatment methods at home and abroad, after the flocculant enters the water body, it acts on the impurities in the water by means of adsorption bridging or electrical neutralization to make them settle, thereby producing the flocculation effect. The flocculation sedimentation method is not only important status, and widely used (Liu Rui et al. Research and Application Progress of Water Treatment Flocculant. Journal of Applied Ecology. 2005,16(8):1558-1562). [0003] There are many kinds of flocculants, and the commonly used ones in industry mainly include inorganic flocculants and synthetic organic polymer flocculants. Inorganic flocculants are usually i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 廖学品石碧李锐琴卢加洪张文华曹明蓉唐晓蓉
Owner SICHUAN UNIV
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