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Method for preparing water retention agent from bagasse

A technology of bagasse and water-retaining agent, applied in the direction of sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problems of difficult degradation, easy mildew of products, high manufacturing cost of starch-based water-retaining agent, and reduce production The effect of cost and simple operation

Inactive Publication Date: 2011-09-21
MASTERFUL +1
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Problems solved by technology

[0003] The present invention aims to solve the problems that the existing synthetic polymer water-retaining agents are not conducive to human health, are not easy to degrade, the manufacturing cost of starch-based water-retaining agents is high, and the products are easy to mildew

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  • Method for preparing water retention agent from bagasse

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Embodiment Construction

[0012] The embodiment of the present invention is made by mixing bagasse, acrylic acid, initiator, crosslinking agent, acrylamide, and polyvinyl alcohol, and then chemically synthesizing it under microwave reaction conditions; its percentage by weight is: bagasse 30 %, initiator 8%, acrylic acid 50%, acrylamide 3%, crosslinking agent 0.1%, polyvinyl alcohol 8.9%; among them, the initiator is potassium persulfate, and the crosslinking agent is N, N'-methylenebis Acrylamide. The specific implementation includes the following steps:

[0013] Step 1: Crushing the bagasse to 80-120 meshes, and carrying out alkali cooking at a temperature of 140° C., a pressure of 0.1 MPa, a cooking time of 3 hours, and a mass concentration of alkali of 10%; and then degrading by nitric acid at a temperature of 25 ℃, the pressure is 0.1MPa, the degradation time is 1h, the concentration of nitric acid is 5mol / L, and then washed until neutral, dried and ready for use;

[0014] Step 2, adding the bag...

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Abstract

The invention relates to a method for preparing a water retention agent from bagasse under microwave conditions. The invention develops a method for synthesizing a water retention agent by using bagasse as the raw material and adopting microwave radiation technology. The method comprises the following steps: pulverizing bagasse, screening, boiling with alkali, degrading with nitric acid, washing, drying, gelatinizing with microwaves, adding acrylic acid, initiator, crosslinking agent, acrylamide and polyvinyl alcohol, and reacting in a microwave oven under certain conditions; and carrying out vacuum drying on the crude product, pulverizing, leaching with leaching, and carrying out vacuum drying to obtain the water retention agent. The invention is simple to operate, has the characteristics of high efficiency and energy saving, can lower the production cost of the water retention agent, and implements utilization of renewable resources at high added value; and the prepared water retention agent is easily degradable, and can not easily become moldy.

Description

technical field [0001] The invention relates to a method for preparing a water-retaining agent by using bagasse under microwave conditions. Background technique [0002] Bagasse is the dregs of sugar cane after sugar extraction; the crude fiber content is 44% to 46%. Our country produces more than 8 million tons of bagasse every year, and most of these bagasses are directly burned as boiler fuel and have not been fully utilized. At present, there are many ways to prepare water-retaining agents, mainly as follows: aqueous solution polymerization method, reverse phase suspension polymerization method, and reverse phase emulsion polymerization method. Existing preparations of water-retaining agents can be divided into three categories according to raw materials: one is synthetic polymers (polyacrylic acid, etc.); the other is starch (starch grafting, hydroxymethylation, etc.); the third is cellulose (hydroxymethyl chemicalization, grafting, etc.). The first type of water ret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F2/46
CPCY02P20/10
Inventor 万富刘鑫
Owner MASTERFUL
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