A method for demulsifying oil-in-water emulsions

An oil-in-water type, emulsion technology, applied in separation methods, chemical instruments and methods, liquid separation, etc., to achieve the effect of rapid demulsification and strong adsorption capacity

Active Publication Date: 2020-11-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although HPAMAM has a high polarity, there is no report that the amino groups on the end groups of hyperbranched polyamidoamines are modified and used for demulsification in oil-in-water emulsions.

Method used

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  • A method for demulsifying oil-in-water emulsions
  • A method for demulsifying oil-in-water emulsions
  • A method for demulsifying oil-in-water emulsions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Amphiphilic hyperbranched polyamide amine modification (HPAMAM-am-C 12 )preparation

[0032] Dissolve 3g of HPAMAM in 20mL of methanol, inject a small amount of glacial acetic acid, stir and mix, then add 3.65mL of lauric aldehyde, and react at room temperature for 0.5h. Weighing 3.45g of sodium triacetoxyborohydride (STAB) was added to the reaction system, and reacted for 12 hours at room temperature to obtain a crude product with a high degree of polymerization; subsequently, the crude product was concentrated and cooled to room temperature and then extracted three times with dichloromethane, spin Steam to get HPAMAM-am-C 12 .

[0033] Amphiphilic hyperbranched polyamidoamine (HPAMAM-am-C 12 ) structure diagram, such as figure 1 As shown, it should be noted that since the hyperbranched structure is variable and complex, the structure shown is only an example.

Embodiment 2～4

[0034] Embodiment 2~4: Amphiphilic hyperbranched polyamidoamine modification (HPAMAM-am-C 12 )preparation

[0035] With reference to Example 1, amphiphilic hyperbranched polyamidoamine modified product is prepared, and the specific process parameters are as shown in table 1, and the amphiphilic hyperbranched polyamidoamine modified product (HPAMAM-am-C 12 ).

[0036] Table 1: Comparison of preparation process parameters in Examples 1 to 4

[0037]

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Abstract

The invention relates to a method for demulsification of oil-in-water type emulsion. The method comprises the following steps: (1) enabling lauric aldehyde and hyperbranched polyamidoamine to be subjected to aldehyde amine condensation reaction, and then carrying out reductive amination to obtain an amphiphilic hyperbranched polyamidoamine modification substance, wherein the feed ratio of the lauric aldehyde to the hyperbranched polyamidoamine is (1-5 ml):3 g; and (2) dispersing amphiphilic hyperbranched polyamidoamine into the oil-in-water type emulsion to carry out demulsification. By the method, the lower-layer aqueous phase oil removal rate of the oil-in-water type emulsion can be up to 95% at less feeding, and the purpose of efficient and rapid demulsification is realized.

Description

technical field [0001] The invention relates to the technical field of petroleum additives, in particular to a method for demulsifying oil-in-water emulsions. Background technique [0002] With the continuous deepening of oilfield exploitation technology, major oilfields have entered the stage of tertiary oil recovery one after another, and oil resources are decreasing day by day. O / W) type emulsions, and due to the wide application of chemical flooding methods, the stability of crude oil emulsions has gradually increased, and the treatment of produced fluids has become a technical problem in many oilfield productions, and the difficulty of demulsification is increasing. The requirements are also the highest. In view of the above problems, research and development of new environment-friendly demulsifier products with relatively low price, good demulsification performance and wide application range is an urgent problem to be solved in this field. [0003] Hyperbranched poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/05
CPCB01D17/047
Inventor 闫澍何桂金方文军郭永胜
Owner ZHEJIANG UNIV
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