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Hyperbranched polymer flocculant for treating waste drilling fluid and preparation method thereof

A technology of hyperbranched polymer and waste drilling fluid, applied in the field of water treatment, can solve problems such as instability and pollution treatment effect, and achieve the effects of no secondary pollution, high flocculation efficiency, and simple synthesis method and operation.

Inactive Publication Date: 2011-04-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the problems of pollution and unstable treatment effects in the prior art, and provides an environmentally friendly, high-efficiency hyperbranched polymer flocculant with high flocculation efficiency and stable effect and its Preparation

Method used

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  • Hyperbranched polymer flocculant for treating waste drilling fluid and preparation method thereof
  • Hyperbranched polymer flocculant for treating waste drilling fluid and preparation method thereof
  • Hyperbranched polymer flocculant for treating waste drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Synthesis of intermediates:

[0032] (1) AB 2 Synthesis of type monomer: in a three-necked flask, mix diethanolamine and methyl acrylate at a molar ratio of 1:1, add 300 mL / mol of N,N-dimethylacetamide based on the amount of diethanolamine, and heat up To 60 ℃, heat preservation reaction for 8h, and then vacuumize to remove N,N-dimethylacetamide and excess methyl acrylate to obtain colorless transparent oil AB 2 type monomer;

[0033] (2) Synthesis of hydroxyl-terminated hyperbranched polymers: controlling AB 2 The molar ratio of type monomer and trimethylol propane is 4:1 one-time feeding and reacting, then add trimethylol propane and AB 2 The phosphotungstic acid with a total mass ratio of 8% monomers was raised to 90°C, and after 6 hours of reaction, it was transferred to a rotary evaporator to continue the reaction until the system no longer bubbled out, and the hydroxyl-terminated hyperbranched polymer was prepared. Then it is made into a 50% aqueous solutio...

Embodiment 2

[0036] 1. Synthesis of intermediates:

[0037] (1) AB 2 Synthesis of type monomer: Mix diethanolamine and methyl acrylate in a three-necked flask at a molar ratio of 1:2, add 200mL / mol of methanol based on the amount of diethanolamine, raise the temperature to 35°C, and keep the reaction for 4h. Then vacuumize to remove methanol and excess methyl acrylate to obtain colorless transparent oil AB 2 type monomer;

[0038] (2) Synthesis of hydroxyl-terminated hyperbranched polymers: one-step control of AB with nuclei 2 The molar ratio of type monomer and trimethylol propane is 3:1 one-time feeding and reacting, then add trimethylol propane and AB 2 p-toluenesulfonic acid with a total mass ratio of 2% of monomers, heated up to 120 ° C, and transferred to a rotary evaporator after reacting for 5 hours to continue the reaction until the system no longer bubbles out, and the hydroxyl-terminated hyperbranched polymer was obtained , and then make it into a 30% aqueous solution interm...

Embodiment 3

[0041] 1. Synthesis of intermediates:

[0042] (1) AB 2 Synthesis of type monomer: in a three-necked flask, mix diethanolamine and methyl acrylate at a molar ratio of 1:3, add 50 mL / mol of dimethylformamide based on the amount of diethanolamine, and heat up to 70°C. Insulated for 8 hours, then vacuumed to remove dimethylformamide and excess methyl acrylate to obtain a colorless transparent oil AB 2 type monomer;

[0043] (2) Synthesis of hydroxyl-terminated hyperbranched polymers: one-step control of AB with nuclei 2 The molar ratio of type monomer and pentaerythritol is 4:1 one-time feeding and reacting, then add pentaerythritol and AB 2 Benzenesulfonic acid with a total mass ratio of 6% of the type monomer was heated up to 180°C, and after 8 hours of reaction, it was transferred to a rotary evaporator to continue the reaction until the system no longer bubbled out, and a hydroxyl-terminated hyperbranched polymer was obtained. Then it is made into 20% aqueous solution int...

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Abstract

The invention relates to the technical field of water treatment, in particular to an efficient hyperbranched polymer flocculant for treating waste drilling fluid generated during an oil and gas drilling process and a preparation method thereof, which is used for solving the problems such as pollution and unstable treatment effect in the prior art. For the special system of the waste drilling fluid, the invention provides the efficient hyperbranched polymer flocculant which has the advantages of environmental friendliness, high flocculation efficacy and stable effect. The hyperbranched polymerflocculant is prepared by synthesizing an AB2-type monomer to obtain a hydroxyl-terminated hyperbranched polymer, and then loading metal ions on the polymer. The obtained hyperbranched polymer flocculant provided by the invention has the advantages of high flocculation efficacy and no secondary environmental pollution; and the synthesis method and operation are simple, and industrial production can be realized easily.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a high-efficiency hyperbranched polymer flocculant for treating waste drilling fluid produced in the oil and gas drilling process and a preparation method thereof. Background technique [0002] The entire process of the petroleum industry (exploration, drilling, development, storage, transportation and processing) will produce various pollutants (crude oil, oilfield sewage, waste drilling fluid and drilling cuttings) under corresponding conditions. According to statistics, when drilling an ordinary oil and gas well with a depth of 3,000 to 4,000 m, nearly 300 m of drilling fluid will be discarded after completion. 3 my country's oilfields produce more than 12 million tons of waste drilling fluid per year, of which 1 / 2 is directly discharged into the surrounding environment. [0003] At present, the more reliable method of treating waste drilling fluid is the solidificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08G63/685C08G63/78
Inventor 王学川胡艳鑫张莎郑书杰
Owner SHAANXI UNIV OF SCI & TECH
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