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Preparation method of ultrahigh molecular weight sulfonic acid-type polyacrylamide

A polyacrylamide, ultra-high molecular weight technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as low molecular weight, and achieve the effects of simple reaction operation, reduction of polymer dosage, and cost savings

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present the molecular weight of the copolymer is still low, as disclosed in CN98102551.X, a copolymer of high molecular weight sulfonated monomer and acrylamide is produced at a lower temperature of 15-30°C, and the molecular weight is less than 7 million

Method used

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  • Preparation method of ultrahigh molecular weight sulfonic acid-type polyacrylamide
  • Preparation method of ultrahigh molecular weight sulfonic acid-type polyacrylamide
  • Preparation method of ultrahigh molecular weight sulfonic acid-type polyacrylamide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 370g (1.7857mol) of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 380g (5.346mol) of acrylamide (AM) into a 5000ml beaker, add 1940g of deionized water, stir to make The body was completely dissolved, and then slowly added 285.8 g (1.786 mol NaOH) of 25% NaOH aqueous solution and stirred evenly. Add 5.0 g of 1% EDTA aqueous solution, 6.0 g of 1% azobisisobutylamidine hydrochloride aqueous solution, 0.3 g of urea, and 1% of bifunctional peroxide 2,5-dimethyl Base-2,5-dihydroperoxyhexane 6.0g, stir well to make it evenly mixed. Adjust the pH of the system to 8.0 with 1% sodium hydroxide or 1% hydrochloric acid aqueous solution. Put it in a refrigerator or a low-temperature bath to cool the material to 4°C, then pour the cooled solution into a 4700ml Dewar flask to reduce the heat exchange between the system and the outside world, and add 1% Sodium bisulfite aqueous solution 6.0g, and continue nitrogen deoxygenation for 10 minutes. The reactor is sealed, and ...

Embodiment 2

[0050] 416g (2.008mol) of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 334g (4.6989mol) of acrylamide (AM) were added to a 5000ml beaker, and 1906g of deionized water was added, and stirred to make a single The body was completely dissolved, and then slowly added 25% NaOH aqueous solution 321g (2.006mol NaOH) and stirred evenly. Add 5.0 g of 1% EDTA aqueous solution, 6.0 g of 1% azobisisobutylamidine hydrochloride aqueous solution, 0.3 g of urea, and 1% of bifunctional peroxide 2,5-dimethyl Base-2,5-dihydroperoxyhexane 6.0g, stir well to make it evenly mixed. Adjust the pH of the system to 8.0 with 1% sodium hydroxide or 1% hydrochloric acid aqueous solution. Put it in a refrigerator or a low-temperature bath to cool the material to 4°C, then pour the cooled solution into a 4700ml Dewar flask to reduce the heat exchange between the system and the outside world, and add 1% Sodium bisulfite aqueous solution 6.0g, and continue nitrogen deoxygenation for 10 minutes. The...

Embodiment 3

[0052] Add 495g (2.3890mol) of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 255g (3.5875mol) of acrylamide (AM) into a 5000ml beaker, add 1844g of deionized water, stir to make The body was completely dissolved, and then 382.2 g (2.389 mol NaOH) of 25% NaOH aqueous solution was slowly added and stirred evenly. Add 5.0 g of 1% EDTA aqueous solution, 6.0 g of 1% azobisisobutylamidine hydrochloride aqueous solution, 0.3 g of urea, and 1% of bifunctional peroxide 2,5-dimethyl Base-2,5-dihydroperoxyhexane 6.0g, stir well to make it evenly mixed. Adjust the pH of the system to 8.0 with 1% sodium hydroxide or 1% hydrochloric acid aqueous solution. Put it in a refrigerator or a low-temperature bath to cool the material to 4°C, then pour the cooled solution into a 4700ml Dewar flask to reduce the heat exchange between the system and the outside world, and add 1% Sodium bisulfite aqueous solution 6.0g, and continue nitrogen deoxygenation for 10 minutes. The reactor is sealed,...

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Abstract

The invention relates to a preparation method of water-soluble polymer, and especially relates to a preparation method of ultrahigh molecular weight sulfonic acid-type polyacrylamide copolymer used for tertiary oil recovery oil displacement agents. The ultrahigh molecular weight heatproof salt-resistant sulfonic acid-type acrylamide copolymer prepared by the invention has a high molecular weight, good solubility and a low monomer residual quantity, and thus can be used for polymer oil displacement agents for high-temperature high-salt oil reservoirs. The invention is used in the petroleum exploitation field.

Description

technical field [0001] The invention belongs to a preparation method of a water-soluble polymer, in particular to a novel initiation system of an ultrahigh molecular weight sulfonic acid type polyacrylamide. Background technique [0002] At present, my country's large-scale oilfields, such as Daqing Oilfield and Shengli Oilfield, have entered the middle and late stages of development, and it is imperative to use tertiary oil recovery technology to improve oil recovery. Among the tertiary oil recovery technologies, the chemical flooding technology occupies an important position, and among the chemical flooding, the polymer flooding technology is the most mature and effective. my country's continental reservoir formations are very suitable for polymer flooding. In my country, polymer flooding is a high-efficiency tertiary oil recovery technology. At present, the polymer used for oil displacement is mainly high molecular weight partially hydrolyzed polyacrylamide (HPAM). Wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F4/40C08F4/04C09K8/588
Inventor 刘晓光魏小林赵方园祝纶宇林蔚然计文希杜凯李勇伊卓刘希
Owner CHINA PETROLEUM & CHEM CORP
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