Method for preparing metal chelating fiber through waste acrylic fiber
A technology of acrylic fiber and metal chelation, applied in the direction of alkali metal compounds, fiber treatment, chemical instruments and methods, etc., can solve the problems of poor product processing efficiency and regeneration rate, complex preparation process of chelated fiber, high production cost, etc. Achieve the effect of fast regeneration rate, quick effect and fast elution speed
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Embodiment 1
[0022] This embodiment includes the following steps:
[0023] (1) Mechanically crush and recycle the waste acrylic carpet;
[0024] (2) Take 50g of recovered waste acrylic fiber, wash it with 100g of acetone, and centrifuge to remove the liquid for use; press water 100g, glycidyl acrylate 6g, nonionic surfactant (Tween80) 0.4g, 31wt% hydrogen peroxide 0.8g of aqueous solution and 0.25g of thiourea dioxide were formulated into an emulsion, and the waste acrylic fibers after centrifugation to remove the liquid were added to the emulsion, soaked at 60°C for 2 hours, then washed with water, centrifuged to remove the liquid, and placed at 60°C Vacuum drying for 8 hours (vacuum degree 400Pa) to obtain acrylic fibers grafted with glycidyl acrylate; 200g of ethylenediaminediacetic acid was added to 800g of water, and the pH value was adjusted to 11 with 30wt% sodium hydroxide aqueous solution, and the obtained Immerse the acrylic fibers in the solution, soak at 90°C for 2 hours, then...
Embodiment 2
[0026] This embodiment includes the following steps:
[0027] (1) Mechanically crush and recycle the waste acrylic carpet;
[0028] (2) Take 50 g of recovered waste acrylic fiber, wash with 100 g of acetone, and centrifuge to remove the liquid for use; add 150 g of hydroxylamine hydrochloride and 50 g of ethylenediamine diacetic acid to 800 g of water, and adjust the pH to 11. Immerse the waste acrylic fiber after centrifugation to remove the liquid in the solution, soak it at 80°C for 2 hours, then wash it with water, centrifuge to remove the liquid, soak it with 5wt% sulfuric acid solution (200ml) at room temperature After 30 minutes, wash with water, centrifuge and dehydrate, then vacuum dry at 50°C for 8 hours (vacuum degree is 500Pa) to obtain non-crosslinked metal chelate fiber (chelate fiber B).
Embodiment 3
[0030] This embodiment includes the following steps:
[0031] (1) Mechanically crush and recycle the waste acrylic carpet;
[0032] (2) Take 50g of recovered waste acrylic fibers, wash them with 100g of acetone, and centrifuge to remove the liquid for use; use 100g of water, 6g of hydrazine hydrate, 0.5g of nonionic surfactant (OP-10), and 31wt% hydrogen peroxide 0.8 g of aqueous solution and 0.25 g of thiourea dioxide were formulated into an emulsion, and the waste acrylic fiber after the centrifugation treatment was added to the emulsion, soaked at 60°C for 2 hours, then washed with water, centrifuged to remove the liquid, and then vacuum-dried at 60°C 8 hours (vacuum degree is 500Pa), get the cross-linked acrylic fiber; add ethylenediamine diacetic acid 100g, 8-hydroxyquinoline 100g in 800g water, adjust pH to be 10 with 32wt% sodium hydroxide aqueous solution, the obtained cross The linked acrylic fiber is immersed in the solution, soaked at 90°C for 2 hours, then washed ...
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Abstract
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