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A degreasing agent for heavy oil thermal recovery sewage and its preparation method

A technology for thermal recovery of heavy oil and degreasing agent, applied in mining wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as unsatisfactory degreasing effect, etc. The effect of less oil removal and high oil removal efficiency

Active Publication Date: 2018-10-26
YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the unsatisfactory degreasing effect currently used in heavy oil thermal recovery sewage, the present invention proposes a simple process, low cost, temperature-resistant and salt-resistant, and good degreasing effect, which is suitable for heavy oil thermal recovery sewage treatment. Oil agent

Method used

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  • A degreasing agent for heavy oil thermal recovery sewage and its preparation method
  • A degreasing agent for heavy oil thermal recovery sewage and its preparation method
  • A degreasing agent for heavy oil thermal recovery sewage and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Degreaser A 1 and its preparation method

[0030] (1) Degreaser A 1 The composition, components and molecular weight are as follows:

[0031] Degreaser A 1 It is prepared from acrylamide, N-benzyl-N-ethylacrylamide and vinyl acetate in a molar ratio of 1:0.5:0.1 through free radical micellar polymerization, with an average molecular weight of 8000.

[0032] (2) Degreaser A 1 The preparation method is as follows:

[0033] ①Add 355.4g of deionized water and 0.5mol 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 200rpm, and keep the temperature constant for 20min;

[0034] ② Add 1 mol of acrylamide to the above-mentioned three-necked flask, raise the temperature to 45°C, add 0.36g of sodium lauryl sulfate, stir for 36min at a stirring rate of 500rpm, after the stirring time is over, the temperature rises to 60°C, Constant temperature 25min obtains...

Embodiment 2

[0037] Embodiment 2: Degreaser A 2 and its preparation method

[0038] (1) Degreaser A 2 The composition, components and molecular weight are as follows:

[0039] Degreaser A 2 It is prepared from acrylamide, N-benzyl-N-ethylacrylamide and vinyl acetate in a molar ratio of 1:1.5:2 through free radical micellar polymerization, with an average molecular weight of 25,000.

[0040] (2) Degreaser A 2 The preparation method is as follows:

[0041] ①Add 710.8g 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 260rpm, and keep the temperature constant for 25min;

[0042] ② Add 1 mol of acrylamide to the above-mentioned three-necked flask, raise the temperature to 48°C, add 0.71g of sodium dodecylsulfonate, and stir for 30 minutes at a stirring rate of 520rpm. After the stirring time is over, the temperature rises to 63°C , constant temperature f...

Embodiment 3

[0045] Embodiment 3: Degreaser A 3 and its preparation method

[0046] (1) Degreaser A 3 The composition, components and molecular weight are as follows:

[0047] Degreaser A 3 It is prepared from acrylamide, N-benzyl-N-ethylacrylamide and vinyl acetate in a molar ratio of 1:3:2.5 by free radical micellar polymerization, and has an average molecular weight of 48,000.

[0048] (2) Degreaser A 3 The preparation method is as follows:

[0049] ①Add 1066.2g of deionized water and 3mol of N-benzyl-N-ethylacrylamide into a three-necked flask equipped with a thermometer and a stirring rod, raise the temperature to 40°C at a stirring rate of 300rpm, and keep the temperature at a constant temperature for 30min;

[0050] ② Add 1 mol of acrylamide to the above-mentioned three-necked flask, raise the temperature to 50°C, add 1.42g of sodium dodecylsulfonate, and stir for 40min at a stirring rate of 550rpm. After the stirring time is over, the temperature rises to 65°C , keep the temp...

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Abstract

The invention belongs to the technical field of oil field sewage treatment, and particularly relates to an oil removal agent for thickened oil thermal recovery sewage. The oil removal agent is prepared from acrylamide, N-benzyl-N-ethyl acrylamide and acetic acid vinyl ester through a free-radical micelle copolymerization method, and is 6,000 to 50,000, preferably 20,000 to 30,000 in molecular weight, wherein the molar ratio of the acrylamide to the N-benzyl-N-ethyl acrylamide to the acetic acid vinyl ester is 1 to (0.5-3) to (0.1-2.5), preferably 1 to 1.5 to 2. The oil removal agent has the advantages of easiness in preparation, high temperature and salt resistance and low cost, and the oil removal rate can reach 96 percent or above; moreover, subsequent crude oil dehydration is not influenced by recycled oil generated by separation. Thus, the oil removal agent can be widely applied to an oil removal process of oil field thickened oil thermal recovery sewage.

Description

technical field [0001] The invention relates to a degreasing agent for oil field sewage treatment, which is especially suitable for the degreasing agent for the treatment of heavy oil thermal recovery sewage. 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): C08F220/56C08F220/54C08F218/08C02F1/28C02F1/56
CPCC02F1/285C02F1/56C02F2103/10C08F218/08C08F220/54C08F220/56
Inventor 赵世芬
Owner YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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