Technique for preparing high solid-content low oil-water ratio water-soluble polymer reversed phase emulsion

A technology of water-soluble polymer and inverse microemulsion, which is applied in the field of low oil-water ratio inverse microemulsion preparation and high solid content. phase microemulsion etc.

Inactive Publication Date: 2008-08-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are following major deficiencies in the existing water-soluble polymer inverse microemulsion preparation technology: (1) be difficult to obtain the inverse microemulsion of high solid content
(2) It is difficult to obtain an inverse microemulsion with a low oil-water ratio
[0005] In summary, for the preparation technology of water-soluble polymer inverse microemulsion, there is no widely applicable method that can simultaneously control the polymerization rate and maintain the high molecular weight of the polymer, and obtain high solid content and high monomer conversion rate. , Water-soluble polymer inverse microemulsion with low oil-water ratio

Method used

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  • Technique for preparing high solid-content low oil-water ratio water-soluble polymer reversed phase emulsion
  • Technique for preparing high solid-content low oil-water ratio water-soluble polymer reversed phase emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The synthesis of embodiment 1 stabilizer

[0018] Weigh 5 grams of OP-10, dissolve it with 30 milliliters of acetone, then add 10 milliliters of toluene, raise the temperature to 50-55 °C, add APS initiator solution and 5 grams of butyl acrylate dropwise to the reaction system at the same time, after the addition is complete, keep it warm After 3-5 hours, the reaction is stopped, and the organic solvent and unreacted butyl acrylate are removed to obtain a self-made stabilizer. The amount of APS accounts for 0.2% to 0.3% of the amount of butyl acrylate.

Embodiment 2

[0019] The preparation of the sodium acrylate-acrylamide copolymer inverse microemulsion of embodiment 2 solid content 40%, oil-water ratio 0.5

[0020] In the 100ml three-necked bottle that condensing pipe, air guide tube and mechanical stirring are housed, lead high-purity nitrogen, to discharge oxygen, and add 7.44 gram 32# white oils, 4.5 gram emulsifier SPAN80, gained in 0.56 gram embodiment 1 self-made Stabilizer, warming up to 50°C, after vigorous stirring for 10 minutes, add 23 grams of 56% sodium acrylate-acrylamide (weight ratio of sodium acrylate / acrylamide 1:4) aqueous solution, continue stirring for half an hour, and then slowly add APS aqueous solution (0.03 gram of APS is dissolved in 1 gram of water), when the APS aqueous solution is added to about half of the total amount, slowly start dripping ferric chloride aqueous solution (0.06 gram of ferric chloride is dissolved in 1 gram of water), controlled at About 1 hour to drip. After that, continue to pass high-...

Embodiment 3

[0021]Example 3 Preparation of polyacrylamide inverse microemulsion with a solid content of 40%, an oil-water ratio of 0.6 Pass high-purity nitrogen into a 100ml three-necked bottle equipped with a condenser tube, an air guide tube and a mechanical stirrer to remove oxygen, and add 9.6 Gram 32# white oil, 4.8 grams of emulsifier SPAN80, 0.6 grams of self-made stabilizer obtained in Example 1, heat up to 50 ° C, after vigorously stirring for 10 minutes, add 23 grams of 60% acrylamide aqueous solution, continue stirring for half an hour, Then slowly add APS aqueous solution (0.03 gram of APS is dissolved in 1 gram of water), when the APS aqueous solution is added to about half of the total amount, start to slowly add dropwise ferric chloride aqueous solution (0.06 gram of ferric chloride is dissolved in 1 gram of water) ), controlled to finish dripping in about 1 hour. After that, continue to pass high-purity nitrogen to react for 3 hours, lower the temperature, and stop the rea...

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Abstract

The invention relates to a water soluble polymer reverse micro emulsion with high solid content and low oil-water ratio, which comprises (1) preparing water-soluble vinyl monomer into 40-70% vinyl monomer water solution, (2) feeding high-purity nitrogen into the mixture of oil phase, emulsifier and stabilizer, mixing completely, increasing temperature to 30-50DEG C, adding vinyl monomer water solution, mixing, synchronously adding inducer and polymerization speed control agent, feeding high-purity nitrogen, reacting for 3-5h to obtain reverse micro emulsion. The prepared reverse micro emulsion has 35-42% solid content and 99.5-100% monomer conversion rate, while the stable storage period is longer than half yield, the product is easily dissolved in water and the application effect is better than the water soluble polymer reverse micro emulsion which oil-water ratio is higher than 1:1.

Description

Technical field: [0001] The invention relates to the preparation technology of high solid content and low oil-water ratio inverse microemulsion, in particular to the regulation method of polymerization speed and polymer high molecular weight, and the preparation technology of a stabilizer suitable for low oil-water ratio inverse microemulsion polymerization system. Background technique: [0002] Inverse microemulsion polymerization technology started in the 1980s. Compared with conventional inverse emulsion polymerization technology, the water-soluble polymer inverse microemulsion (such as: water-soluble vinyl monomer copolymer or homopolymer inverse microemulsion) prepared by inverse microemulsion polymerization technology has storage stability. Good properties, high polymer relative molecular weight (more than 10 6 ), easy to operate (can be directly transported by pump, easy to realize automatic control) and other characteristics, it is widely used in multiple oil recove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/56C08F20/06C08F20/38C08F2/22C08F2/38
Inventor 胡慧平张丽娟张琨瑜陈启元
Owner CENT SOUTH UNIV
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