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Terpolymer used as degreasing agent for heavy oil thermal recovery wastewater treatment

A ternary polymer and heavy oil thermal recovery technology, which is applied in special compound water treatment, mining wastewater treatment, water/sewage treatment, etc., can solve problems such as corrosion, achieve less consumption, strong adaptability, and simple synthesis process Effect

Active Publication Date: 2019-05-17
SHENGLI OIL FIELD FANGYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent ZL201410254042.8 "a composite flocculation degreasing agent for oily sewage treatment" is made of aluminum sulfate, magnesium chloride, magnesium hydroxide, bentonite and polyacrylamide. High efficiency, simple preparation, low cost, etc., but the degreasing agent needs to use corrosive magnesium hydroxide, which has a strong corrosive effect on equipment

Method used

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  • Terpolymer used as degreasing agent for heavy oil thermal recovery wastewater treatment
  • Terpolymer used as degreasing agent for heavy oil thermal recovery wastewater treatment
  • Terpolymer used as degreasing agent for heavy oil thermal recovery wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Degreaser C 1 and its preparation method

[0035] (1) Degreaser C 1 The composition, components and molecular weight are as follows:

[0036] Degreaser C 1 It is prepared from acrylamide, N-benzyl-N-ethylacrylamide and N-vinylpyrrolidone at a molar ratio of 1:1.1:1.5 by free radical micellar polymerization, with an average molecular weight of 42,000.

[0037] (2) Degreaser C 1 The preparation method is as follows:

[0038] ①Add 1052g of deionized water and 1.1mol of N-benzyl-N-ethylacrylamide into a three-necked flask equipped with a thermometer and a stirring rod, raise the temperature to 32°C at a stirring rate of 300rpm, and keep the temperature constant for 60min;

[0039] ② Add 1 mol of acrylamide to the above-mentioned three-necked flask, raise the temperature to 50°C, add 2.55g of sodium lauryl sulfate, stir for 30min, and the stirring speed is 550rpm. 50min obtains mixture;

[0040] ③Use 6mol / L sodium hydroxide solution to adjust the pH valu...

example 2

[0042] Example 2: Degreaser C 2 and its preparation method

[0043] (1) Degreaser C 2 The composition, components and molecular weight are as follows:

[0044] Degreaser C 2 It is prepared from acrylamide, N-benzyl-N-ethylacrylamide and N-vinylpyrrolidone at a molar ratio of 1:0.1:0.5 by free radical micellar polymerization, with an average molecular weight of 12,000.

[0045] (2) Degreaser C 2 The preparation method is as follows:

[0046]①Add 710.8g of deionized water and 0.1mol of N-benzyl-N-ethylacrylamide into a three-necked flask equipped with a thermometer and a stirring rod, raise the temperature to 30°C at a stirring rate of 400rpm, and keep the temperature for 45min;

[0047] ② Add 1 mol of acrylamide to the above-mentioned three-necked flask, raise the temperature to 45°C, add 1.42g of sodium dodecylsulfonate, and stir for 25min at a stirring rate of 600rpm. After the stirring is completed, the temperature rises to 70°C. Constant temperature 30min obtains mixt...

Embodiment 3

[0050] Embodiment 3: Degreaser C 3 and its preparation method

[0051] (1) Degreaser C 3 The composition, components and molecular weight are as follows:

[0052] Degreaser C 3 It is prepared from acrylamide, N-benzyl-N-ethylacrylamide and N-vinylpyrrolidone at a molar ratio of 1:1.5:3 by free radical micellar polymerization, with an average molecular weight of 86,000.

[0053] (2) Degreaser C 3 The preparation method is as follows:

[0054] ①Add 1421.6g of deionized water and 1.5mol of N-benzyl-N-ethylacrylamide into a three-necked flask equipped with a thermometer and a stirring rod, raise the temperature to 35°C at a stirring rate of 500rpm, and keep the temperature for 30min;

[0055] ② Add 1 mol of acrylamide to the above-mentioned three-necked flask, raise the temperature to 40°C, add 3.55g of sodium lauryl sulfate, stir for 20min, and the stirring speed is 500rpm. 40min obtains mixture;

[0056] ③Adjust the pH value of the mixture with 6mol / L sodium hydroxide sol...

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Abstract

The invention belongs to the technical field of oil field sewage treatment, and particularly relates to a ternary polymer degreasing agent used for thickened oil thermal production sewage treatment. The degreasing agent is prepared by acrylamide, N-benzyl-N-ethylacrylamide and N-vinyl pyrrolidone through a free-radical micelle copolymerization method. The molecular weight of the degreasing agent is 10000-90000, and 30000-50000 preferably. The molar ratio of the acrylamide to the N-benzyl-N-ethylacrylamide to the N-vinyl pyrrolidone is 1:0.1-1.5:0.5-3, and 1:1.1:1.5 preferably. The degreasing agent disclosed by the invention is easy to prepare, high in temperature resistance and salt tolerance and low in cost, and the degreasing rate can reach 96% or above. Moreover, recovered oil generated in the separation process cannot influence subsequent crude oil dehydration. Therefore, the ternary polymer degreasing agent can be widely applied to degreasing technologies of oil field thickened oil thermal production sewage.

Description

technical field [0001] The invention relates to a degreasing agent used for oilfield sewage treatment, in particular to a ternary polymer degreasing agent used for heavy oil thermal recovery sewage treatment. Background technique [0002] The viscosity of heavy oil is high, and the sewage treatment produced by mining has always been one of the important links restricting its development. After the crude oil undergoes thermochemical sedimentation treatment in the dehydration process for a period of time, the sediment and other mechanical impurities enter the sewage system together, so that the total amount of suspended solids in the sewage reaches about 20,000mg / L. It makes sewage treatment more difficult. At the same time, in order to lift the ultra-heavy oil to the ground, some surfactants, such as sulfonate and other substances, are added during the oil recovery process, so that the produced fluid needs to be demulsified and dehydrated, resulting in a large amount of chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F1/56C02F1/28C08F220/56C08F220/54C08F226/10C02F103/10C02F101/32
CPCC02F1/285C02F1/56C02F1/58C02F2101/32C02F2103/10C02F2305/04C08F220/56C08F220/54C08F226/10
Inventor 赵世芬
Owner SHENGLI OIL FIELD FANGYUAN CHEM IND
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