Degreasing agent for heavy oil thermal recovery wastewater treatment and preparation method thereof

A technology for sewage treatment and degreasing agent, which is applied in mining wastewater treatment, water/sewage treatment, adsorbed water/sewage treatment, etc. It can solve problems such as unsatisfactory degreasing effect, achieve easy access, transportation and preservation, strong salt resistance Features, to meet the effect of environmental protection

Active Publication Date: 2019-05-31
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] In view of the unsatisfactory degreasing effect currently used in heavy oil sewage, the present invention proposes a degreasing agent with simple process, low cost and good degreasing effect, which is suitable for the treatment of heavy oil thermal recovery sewage and its preparation method

Method used

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  • Degreasing agent for heavy oil thermal recovery wastewater treatment and preparation method thereof
  • Degreasing agent for heavy oil thermal recovery wastewater treatment and preparation method thereof
  • Degreasing agent for heavy oil thermal recovery wastewater treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Degreaser B 1 and its preparation method

[0031] (1) Degreaser B 1 The composition, components and molecular weight are as follows:

[0032] Degreaser B 1 It is prepared by free radical micellar polymerization from N-methacrylamide, N-benzyl-N-ethylacrylamide and vinyl cyclohexyl formate in a molar ratio of 1:0.2:0.5. The average molecular weight is 8500.

[0033] (2) Degreaser B 1 The preparation method is as follows:

[0034] ①Add 851.2g of deionized water and 0.2mol 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 360rpm, and keep the temperature at a constant temperature for 50min;

[0035] ② Add 1 mol of N-methacrylamide to the above-mentioned three-necked flask, raise the temperature to 40°C, add 0.85g of sodium lauryl sulfate, and stir for 26min at a stirring rate of 500rpm. After stirring, the temperature rises to 63°C, constant tempera...

Embodiment 2

[0038] Embodiment 2: Degreaser B 2 and its preparation method

[0039] (1) Degreaser B 2 The composition, components and molecular weight are as follows:

[0040] Degreaser B 2 It is prepared by free radical micellar polymerization from N-methacrylamide, N-benzyl-N-ethylacrylamide and vinyl cyclohexyl formate in a molar ratio of 1:2.5:0.75. The average molecular weight is 20,000.

[0041] (2) Degreaser B 2 The preparation method is as follows:

[0042] ①Add 1276.8g of deionized water and 2.5mol 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 400rpm, and keep the temperature constant for 40min;

[0043] ② Add 1 mol of N-methacrylamide to the above-mentioned three-necked flask, raise the temperature to 50°C, add 1.7g of sodium dodecylsulfonate, and stir for 20min at a stirring speed of 560rpm. After stirring, the temperature rises To 70°C, keep the temperature for 30...

Embodiment 3

[0046] Embodiment 3: Degreaser B 3 and its preparation method

[0047] (1) Degreaser B 3 The composition, components and molecular weight are as follows:

[0048] Degreaser B 3 It is prepared by free radical micellar polymerization from N-methacrylamide, N-benzyl-N-ethylacrylamide and vinyl cyclohexyl formate in a molar ratio of 1:4:1.5, with an average molecular weight of 58,000.

[0049] (2) Degreaser B 3 The preparation method is as follows:

[0050] ①Add 1021.4g of deionized water and 4mol 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 300rpm, and keep the temperature for 30min;

[0051] ② Add 1 mol of N-methacrylamide to the above-mentioned three-necked flask, raise the temperature to 45°C, add 1.2g of sodium lauryl sulfate, and stir for 30min at a stirring rate of 600rpm. After stirring, the temperature rises to 60°C, constant temperature for 50min to obtain...

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Abstract

The invention specifically relates to an oil removing agent used for treating sewage produced by thermal recovery of thickened oil, belonging to the technical field of treatment of oil field wastewater. The oil removing agent is prepared from N-methacrylamide, N-benzyl-N-ethyl acrylamide and cyclohexyl vinyl formate through micellar free-radical copolymerization and has a molecular weight of 8000 to 60000, preferably 15000 to 25000, wherein a mol ratio of N-methacrylamide to N-benzyl-N-ethyl acrylamide to cyclohexyl vinyl formate is 1: (0.2-4): (0.5-1.5), preferably 1: 2.5: 0.75. The oil removing agent provided by the invention is simple to prepare, strong in resistance to temperature and salt, low in cost and high in oil removal rate, as high as 96% to above; recovered oil obtained after separation does not influence subsequent dehydration of crude oil; thus, the oil removing agent is extensively applicable to oil removing processes for sewage produced by thermal recovery of thickened oil in an oil field.

Description

technical field [0001] The invention relates to a degreasing agent for sewage treatment, which is especially suitable for the degreasing agent for the treatment of sewage in thermal recovery of heavy oil and its preparation method. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/40B01J20/26B01J20/30C02F103/10C02F101/32
CPCB01J20/261B01J2220/44B01J2220/4812C02F1/286C02F1/40C02F2101/32C02F2103/10
Inventor 赵世芬
Owner YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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