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Non-polyether type demulsifying agent and preparation method thereof

A demulsifier, non-polyether technology, applied in the field of non-polyether demulsifier and its preparation, can solve the problem that acrylate polymers cannot achieve the demulsification effect

Active Publication Date: 2006-12-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been proved by experiments that the acrylic polymer synthesized according to this method cannot achieve the demulsification effect described in the patent

Method used

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  • Non-polyether type demulsifying agent and preparation method thereof
  • Non-polyether type demulsifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Reaction components:

[0045](A) emulsifying agent: sodium dodecylbenzenesulfonate 0.06 gram; Dissolve with 75 grams of water;

[0046] (B) Initiator 1: 0.06 grams of ammonium persulfate; Dissolved with 1.5 grams of water;

[0047] (C) Hydrophobic monomer: 16.5 grams of methyl methacrylate, 9 grams of butyl acrylate; chain transfer agent: 0.4 grams of n-butyl β-mercaptoacrylate; the three are mixed and divided into 4 equal parts;

[0048] (D) Hydrophilic monomer: 3.0 grams of methacrylic acid, 1.5 grams of acrylic acid; chain transfer agent: 0.05 grams of n-butyl β-mercaptoacrylate; the three are mixed and divided into 3 equal parts;

[0049] (E) Initiator 2: 0.024 grams of tert-butyl hydroperoxide and 0.006 grams of sodium metabisulfite, 0.006 grams of ascorbic acid; dissolve with 3.0 grams of water;

[0050] (F) Terminator: 0.024 g of hydroquinone; dissolved in 1.5 g of water.

[0051] Steps:

[0052] (1) To install the instrument, put the four-neck bottle on the ...

Embodiment 2～6

[0059] Using the same emulsion polymerization method as in Example 1, adding hydrophilic monomers and hydrophobic monomers alternately and continuously to the emulsion step by step, changing the type and weight ratio of the monomers to prepare No. 2 to No. 6 non-polyether demulsifiers. Milk effect (oil and gas industry standard SY / T5281-2000) is shown in Table 2.

[0060] demulsifier

dosing

ppm

Dehydration temperature

℃

Dehydration rate at different times, %

come out

water color

30’

60’

90’

120’

150’

number 1

50

60

20.6

30.1

58

86.3

92.6

clear

100

60

23.8

34

63.5

90.5

95.4

clear

1 # No

50

60

Poor demulsification effect

200

60

10.6

22.8

35.2

50

62.8

yellow

500

60

12.7

30.5

46.2

66.4

7...

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Abstract

Disclosed are a novel non-polyether demulsifier for oil field crude oil demulsification and preparation thereof. The demulsifier disclosed is prepared by adding hydrophilic monomers and hydrophobic monomers alternately and continuously for multiple steps as following: mixing alkyl-acrylate and methyl acrylate as raw material at a certain ratio to prepare a hydrophobic monomer mixture, mixing methyl acrylate and acrylic acid as raw material at a certain ratio to prepare hydrophilic monomer mixture, dripping said hydrophobic monomer mixture and said hydrophilic monomer mixture into stable micelle solution continuously and alternately at certain temperature to prepare the product of non-polyether demulsifier, In which the ratio of monomer methacrylate ester is 30-60% of the total weight, the ratio of monomer acrylic ester is 15-40% of the total weight, the ratio of methacrylic acid is 5-30% of the total weight, the ratio of monomer acroleic acid is 5-30% of the total weight. The non-polyether demulsifier disclosed has excellent hydrophilicity and lipophilicity, and a good demulsification effect.

Description

technical field [0001] The invention relates to a non-polyether demulsifier and a preparation method thereof. Background technique [0002] At present, most of my country's oil production uses water flooding, and the produced crude oil contains a lot of water and exists in the form of emulsion. Water content in crude oil emulsion will increase the load on pumps, pipelines and storage tanks. Therefore, it is necessary to demulsify crude oil production fluid. The discovery and use of demulsifiers has a history of 100 years, and several generations of demulsifiers have been developed, such as the first generation of low molecular alcohol, cationic and anionic surfactants, mainly ethylene oxide and propylene oxide Non-ionic second-generation demulsifiers with relatively low molecular weight of block copolymers, third-generation demulsifiers of polyether and polyethylene polyamine polymers with monoalcohols, diols, and polyols as initiators, It has played a great role in oil-wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/04C10G33/04
Inventor 梁泽生徐伟田云峰邵磊
Owner CHINA PETROLEUM & CHEM CORP
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