Method for destroying water absorbency of sodium polyacrylate resin and method for recovering waste/old water absorbing articles

A technology of sodium polyacrylate and water absorption performance, applied in the field of comprehensive utilization of resource recycling, can solve the problems of surge in water consumption, increase in treatment costs, waste of water resources, etc., and achieve the effects of reducing water consumption, reducing production and processing costs, and saving water resources

Active Publication Date: 2014-03-12
青岛福创环境科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the recycling process of waste water-absorbing materials, due to the presence of a large amount of sodium polyacrylate resin, the water consumption in the cleaning stage increases sharply, resulting in waste of water resources and increased treatment costs

Method used

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  • Method for destroying water absorbency of sodium polyacrylate resin and method for recovering waste/old water absorbing articles
  • Method for destroying water absorbency of sodium polyacrylate resin and method for recovering waste/old water absorbing articles

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preparation example Construction

[0031] (1) Preparation of destruction fluid:

[0032] Take containing CaCl 2 Inorganic salt, make it into a solution with a concentration of 0.05% to 5%, and place it in a water bath at 30°C to 80°C for heat preservation to obtain an inorganic salt solution;

[0033] The inorganic salt includes main material CaCl 2 and auxiliary materials, wherein the auxiliary materials are Na 2 SO 4 , mixed in a ratio of 1:1 to 1:5 by mass ratio to obtain an inorganic salt;

[0034] In addition, the inorganic salt can also include the main material CaCl 2 And auxiliary material, wherein auxiliary material is any or composition in NaCl, FeCl3, MgCl2,

[0035] The main material and the auxiliary material are mixed according to the mass ratio of 1:1-1:5 to obtain the inorganic salt.

[0036] Wherein preferably, the CaCl 2 and Na 2 SO 4 The concentration of the mixed solution is 1% to 3%;

[0037] (2) Pretreatment of sodium polyacrylate resin:

[0038] Take the solid sodium polyacryla...

Embodiment 1

[0047] (1) Destruction reagent preparation: take CaCl 2 and Na 2 SO 4 The solids are mixed according to the ratio of 1:1, and the mixture is made into a solution with a concentration of 0.05%, and placed in a water bath at 50°C, and the solution is kept warm for 30 minutes:

[0048] (2) Pre-preparation of sodium polyacrylate resin: prepare 0.1% H 2 SO 4 Solution, take a laboratory triangle flask, after cleaning and drying, take sodium polyacrylate resin, add the prepared H 2 SO 4 The solution was stirred with a glass rod for 15 minutes at room temperature, left to stand for 30 minutes, filtered to obtain a pretreated resin, and set aside.

[0049] (3) Destruction of the water absorption of the resin: then slowly add the resin obtained by filtering in step (2) into the mixed solution in step (1) according to the solid-to-liquid ratio of 1:100, stir with a glass rod, let stand for 6 hours, and filter A treated resin is obtained.

[0050] (4) Inspection of water absorption...

Embodiment 2

[0053] (1) Destruction reagent preparation: take CaCl 2 and Na 2 SO 4 The solids were mixed according to the ratio of 1:2, and the mixture was made into a solution with a concentration of 0.1%, and placed in a water bath at 60°C, and the solution was kept warm for 30 minutes:

[0054] (2) Pre-preparation of sodium polyacrylate resin: prepare 0.1% H 2 SO 4 solution, take a laboratory triangular flask, after cleaning and drying, take sodium polyacrylate resin, add the prepared H 2 SO 4 The solution was stirred with a glass rod for 15 minutes at room temperature, left to stand for 30 minutes, filtered to obtain a pretreated resin, and set aside.

[0055] (3) Destruction of the water absorption of the resin: then slowly add the resin filtered in step (2) to the mixed solution in step (1) according to the solid-to-liquid ratio of 1:200, stir with a glass rod, let stand for 6 hours, and filter A treated resin is obtained.

[0056] (4) Inspection of water absorption performanc...

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Abstract

The invention discloses a method for destroying the water absorbency of sodium polyacrylate resin. The method comprises the following steps: (1) weighing inorganic salt containing CaCl2, and preparing a 0.05-5% solution from the inorganic salt; (2) weighing a sodium polyacrylate resin solid, adding a 0.1-6% H2SO4 solution according to the solid-to-liquid ratio of (1: 100) to (1: 500), and filtering, so as to obtain a pretreated sodium polyacrylate resin solid substance; (3) adding the resin solid substance into an inorganic salt mixed solution according to the solid-to-liquid ratio of (1: 50) to (1: 300), and filtering, thereby obtaining sodium polyacrylate resin with lowered water absorbency. The invention further discloses a method for recovering articles for physiological hygiene. The methods have the good effects that the water absorbency of the sodium polyacrylate resin is lowered to about 1% of the original water absorbency, and the problem of water resource waste during the recovery of waste / old water absorbing articles is solved.

Description

technical field [0001] The invention belongs to the technical field of resource recycling and comprehensive utilization, and relates to a method for destroying the water-absorbing performance of sodium polyacrylate resin and a method for recycling waste water-absorbing articles. Background technique [0002] Sodium polyacrylate resin (Super Absorbent Polymer, referred to as SAP, (polyacrylic acid sodium salt SUPERAB-SORBENT POLYMER)) is a new functional polymer with a three-dimensional network structure that contains strong hydrophilic groups such as hydroxyl and carboxyl groups and has a certain cross-viscosity. Material. At present, the sodium polyacrylate resin materials on the market are mainly sodium polyacrylate. [0003] Compared with traditional water-absorbent materials such as paper, cotton, and sponge, sodium polyacrylate resin can absorb more than 100 times its own weight, and its water absorption capacity can reach 500-2000 times its own weight, up to 5000 time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/16C08L33/02
CPCY02W30/62
Inventor 任宪君张淑娟
Owner 青岛福创环境科技有限公司
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