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Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor

A scale inhibitor and composition technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve problems such as poor biodegradability, poor temperature and alkali resistance, and short performance

Pending Publication Date: 2022-03-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a scale inhibitor composition, scale inhibitor and preparation method thereof, in order to solve the problems of high usage, short performance, poor biodegradability and poor temperature and alkali resistance of scale inhibitors in the prior art. The problem

Method used

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  • Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor
  • Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor
  • Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor

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preparation example Construction

[0031] In another typical embodiment of the present application, a preparation method of a scale inhibitor is provided, the preparation method comprising: mixing, stirring and polymerizing the above scale inhibitor composition to obtain the scale inhibitor composition detergent.

[0032] Apply technical scheme of the present invention, the organic matter in the antiscalant composition of the present application comprises polyaspartic acid salt, R 1 CH=CHC(O)NH 2 and polyethylene glycol. The antiscalant composition has characteristic functional groups that inhibit the formation of silica scale and silicate scale. Specifically, polyaspartate can chelate various metal ions such as calcium, magnesium, copper, and iron, thereby forming soft scale; carboxylate groups form hydrogen bonds with silicic acid molecules in silicon scale inhibitors to increase the adsorption and complexation capabilities of silicon scale inhibitors, thereby reducing the probability of silicic acid molecu...

Embodiment 1

[0043] 70 parts by weight of distilled water, 10 parts by weight of a 40 wt% sodium polyaspartate aqueous solution (based on the dry weight of sodium polyaspartate), 10 parts by weight of acrylamide, 0.5 parts by weight of polyethylene glycol Alcohol and 2.9 parts by weight of a mass concentration of 20% potassium persulfate aqueous solution were added to a 500mL four-necked flask equipped with a constant pressure dropping funnel, a condenser, a thermometer and a stirrer, and then stirred at 70°C under high-purity nitrogen protection. The rotation speed of the device is 700r / min, stirring for 30min until all dissolved, adjusting the pH value to 7.0 with NaOH aqueous solution, and reacting at a constant temperature of 70°C for 6h, the reactant is precipitated with absolute ethanol, extracted, filtered, dried and pulverized to obtain scale inhibition Agent 1.

Embodiment 2

[0045] Taking by weighing 70 parts by weight of distilled water and 10 parts by weight of a concentration of 40wt% sodium polyaspartate aqueous solution (in terms of the dry weight of sodium polyaspartate) adds a constant pressure dropping funnel, condenser, thermometer and In a 500mL four-neck flask with a stirrer, under the protection of high-purity nitrogen, at 70°C, the stirrer speed is 700r / min, after stirring for 30min, add 10 parts by weight of acrylamide, 5 parts by weight of 3-allyloxy After sodium ether-2-hydroxy-1-propanesulfonate, 4 parts by weight of hydroxyethyl acrylate and 0.5 parts by weight of polyethylene glycol, stir until they are completely dissolved, and adjust the pH value to 7.0 with NaOH aqueous solution, and in 1.5h Add 2.9 parts by weight of an aqueous solution of potassium persulfate with a mass concentration of 20% uniformly dropwise, stir well, and react at a constant temperature of 70°C for 6 hours, then precipitate the reactant with absolute eth...

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Abstract

The invention provides a scale inhibitor composition, a scale inhibitor and a preparation method of the scale inhibitor. The scale inhibitor composition comprises the following components in parts by weight: 10-25 parts of polyaspartate; 10 to 15 parts by weight of R1CH = CHC (O) NH2; 0.5-2 parts by weight of polyethylene glycol; 1-3 parts by weight of an initiator; and 50-80 parts by weight of water, and R1 is selected from any one of H, methyl and ethyl. The scale inhibitor composition has various characteristic functional groups for inhibiting generation of silicon dioxide scales and silicate scales, and polyethylene glycol molecules can provide ether groups for scale inhibitor molecules, so that the water solubility of a polymer is improved, and generation of gel is prevented. And the effects of the various characteristic groups can be mutually cooperated, so that the scale inhibitor has excellent silicon scale inhibition capability, and the aim of inhibiting silicon scale is finally achieved.

Description

technical field [0001] The invention relates to the technical field of scale inhibitors, in particular to a scale inhibitor composition, a scale inhibitor and a preparation method thereof. Background technique [0002] With the continuous development of my country's oilfields, the development of oilfields has gradually entered the middle and later stages, which has gradually increased the difficulty of crude oil extraction. After primary and secondary oil recovery, the process of using chemical and biological methods to extract crude oil in the later stage is called "tertiary oil recovery". oil recovery". At present, in the process of "tertiary oil recovery" in most domestic oil fields, various oil recovery methods such as alkali flooding, compound flooding, polymer flooding and surfactant flooding are used to achieve the purpose of enhanced oil recovery. In tertiary oil recovery, whether it is alkali flooding, polymer flooding or composite flooding, alkali is often used as ...

Claims

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Application Information

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IPC IPC(8): C02F5/12C08F283/04C08F283/06C08F220/56C08F216/14C08F220/20C02F103/10
CPCC02F5/12C08F283/04C08F283/06C02F2103/10C08F220/56C08F216/1475C08F220/20
Inventor 亓树成阙庭丽邓泳田波艾肯江·吾不力哈斯木魏云张玉萍于杰雍晓华潘莹左军
Owner PETROCHINA CO LTD