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Composite superabsorbent resin and preparation method thereof

A technology of superabsorbent resin and acrylamide, which is applied in the field of oil drilling, can solve the problem of high cost, and achieve the effect of low cost, good performance and low price

Active Publication Date: 2016-07-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industrialized superabsorbent resin products that have been developed so far generally have high costs. Even if they have good water absorption and salt resistance, it is difficult to apply them on a large scale in the above-mentioned oil drilling engineering field. Composite superabsorbent resin with excellent performance is very necessary

Method used

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  • Composite superabsorbent resin and preparation method thereof
  • Composite superabsorbent resin and preparation method thereof
  • Composite superabsorbent resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Preparation of composite superabsorbent resin: the weight percent of each reaction raw material in the preparation process is composed of: 5% acrylamide; 10% acrylic acid; 15% 2-acrylamide-2-methylpropanesulfonate; 20% Kaolin; 0.4% ammonium persulfate, sodium bisulfite initiator system, 0.1% crosslinking agent N,N'-methylenebisacrylamide, and the balance is water. Specific steps: according to the above weight percentage composition, first add acrylic acid and 2-acrylamide-2-methylpropane sulfonate into distilled water, stir well until the monomers are dissolved, then add acrylamide and kaolin, stir well and then add hydrogen Sodium oxide neutralizes the pH value of the solution to 8-9, and then continues to add an initiator and a crosslinking agent to the solution, react at a constant temperature of 60°C for 4 hours, then dry, pulverize, and granulate to obtain the product.

[0012] Determination of water absorption rate and salt water absorption rate: use sieve filtrat...

Embodiment 2-19

[0015] In order to fully prove the feasibility of the composite superabsorbent resin and its preparation method in the present invention, the composition, proportioning and reaction conditions (temperature and time) of each component in the preparation process were changed in Example 2-19, and the remaining method steps include The determination of the water absorption ratio and the saline absorption ratio is the same as in Example 1, see Table 1 for details. The composition, proportioning, reaction conditions and performance test results of each component in the embodiment 2-19 of table 1, in each embodiment in the table, except each component listed, the balance is water

[0016]

[0017]

[0018] * Note: AM, AA, and AMPS are the abbreviations of acrylamide, acrylic acid, and 2-acrylamide-2-methylpropanesulfonate, respectively, and A and B represent ammonium persulfate, sodium bisulfite system, and potassium persulfate, respectively. Sodium bisulfite system

[0019] ...

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Abstract

The invention discloses compound super absorbent resin which is prepared from the following components in percentage by weight: 1-5% of acrylamide, 5-10% of acrylic acid, 10-20% of 2-acrylamide-2-methyl propane sulfonate, 20-30% of kaolin, bentonite or magnesia and the balance of water. The invention further provides a preparation method of the compound super absorbent resin. The compound super absorbent resin disclosed by the invention is low in use cost and relatively high in water absorbent rate of 1200g / g and salty water absorbent rate of 90g / g, can be widely applied to oilfield exploitation process, such as well drilling leaking stoppage, well cementation, acidizing and fracturing and the like, and can be also applied to drought resistance, water conservation, and conservation of water and soil in the agriculture, forestry and gardening fields and water and leaking stoppage, anti-condensation, humidification, dehumidification and the like in the building fields.

Description

technical field [0001] The invention relates to the field of petroleum drilling, in particular to a composite superabsorbent resin and a preparation method thereof. Background technique [0002] Superabsorbent resin is a lightly cross-linked functional polymer material with high water absorption and water retention capacity. It is mainly used in medical and health care, agriculture, forestry and gardening, and building materials. In recent years, superabsorbent resins have also been gradually applied in the petroleum industry, such as drilling plugging, well cementing and acid fracturing in the process of oilfield exploitation. However, the industrialized superabsorbent resin products that have been developed so far generally have high costs. Even if they have good water absorption and salt resistance, it is difficult to apply them on a large scale in the above-mentioned oil drilling engineering field. And the composite superabsorbent resin with excellent performance is ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F220/06C08F220/56C08F222/38C08K3/34
Inventor 刘音常青马如然李洪俊
Owner BC P INC CHINA NAT PETROLEUM CORP