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A carbon-based attapulgite composite material and its preparation method and application

A technology of composite materials and attapulgite, which is applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of increasing the complexity of subsequent processes, poor specificity, general poor adaptability, and difficulty in demulsification of crude oil, achieving significant demulsification effect, The effect of demulsification is obvious, and the amount of demulsification is small

Active Publication Date: 2021-12-14
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are several demulsification methods: (1) Chemical demulsification method: using chemical reagents to change the properties of the oil-water interface or the strength of the film to achieve demulsification, but because some chemical substances are toxic and difficult to recycle, it will increase the follow-up process complexity of
(2) Biological demulsification method: use microbial cell demulsification or surface active substances produced by microbial metabolism to demulsify. The disadvantage of this method is that the steps are complicated
At present, there are many varieties of crude oil demulsifiers at home and abroad, but they are characterized by strong specificity and poor general adaptability. In the stage of secondary oil recovery and chemical oil recovery, crude oil demulsification is more difficult

Method used

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  • A carbon-based attapulgite composite material and its preparation method and application
  • A carbon-based attapulgite composite material and its preparation method and application
  • A carbon-based attapulgite composite material and its preparation method and application

Examples

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Embodiment 1

[0070] A method for preparing a carbon-based attapulgite composite material according to this embodiment, the method includes the following steps:

[0071] (1) Preparation of pretreatment graphite oxide powder: take graphite powder 3g (325 orders), potassium persulfate 2.5g, phosphorus pentoxide 2.5g measure concentrated sulfuric acid 12mL, four kinds of materials are mixed in the three-necked flask, Heated in a water bath at 80°C for 5h. After the reaction was complete, it was cooled to room temperature, diluted with 0.5L deionized water, and allowed to stand to separate layers. After layering, discard the supernatant, filter out the solid, and obtain the pretreated graphite oxide powder.

[0072] (2) Preparation of graphene oxide: Take 3g of the pretreated graphene oxide obtained in step (1) and add 60mL of cold (0°C) concentrated sulfuric acid, add 15g of potassium permanganate while stirring, and stir the device in a constant temperature water bath at 20°C for 2h, Then a...

Embodiment 2

[0078] The preparation method of a carbon-based attapulgite composite material in this embodiment is basically the same as that in Example 1, the only difference being that the amount of the modified attapulgite clay in step (5) is 7.5 g. The mass ratio of modified attapulgite clay to graphene oxide in the carbon-based attapulgite composite material prepared in this example is 75:1.

Embodiment 3

[0080]The preparation method of a carbon-based attapulgite composite material in this embodiment is basically the same as the method in Example 1, the only difference being that the amount of modified attapulgite clay in step (5) is 5 g. The mass ratio of modified attapulgite clay to graphene oxide in the carbon-based attapulgite composite material prepared in this example is 50:1.

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Abstract

The invention discloses a carbon-based attapulgite composite material and its preparation method and application, and belongs to the demulsification and dehydration treatment technology of crude oil emulsion in the fields of crude oil exploitation and heavy oil emulsification and viscosity reduction. The present invention first carries out a series of surface modifications on the attapulgite clay to obtain the modified attapulgite clay, and then grafts the modified attapulgite clay with graphene oxide to make the attapulgite clay have surface activity and obtain carbon The carbon-based attapulgite composite material is used as a demulsifier to separate oil and water from the emulsion. The invention can effectively and quickly demulsify the crude oil emulsion, reduce the environmental hazards of oily sewage, and thus provide a better method for the development of demulsification. And the demulsification effect of the present invention can reach more than 90% under suitable conditions, the demulsification effect is obvious, and the demulsified water basically meets the secondary water discharge standard and the reinjection standard.

Description

technical field [0001] The invention belongs to the demulsification and dehydration treatment technology of crude oil emulsion in the fields of crude oil exploitation and heavy oil emulsification and viscosity reduction, and specifically relates to a carbon-based attapulgite composite material and its preparation method and application. More specifically, the application refers to the The carbon-based attapulgite composite material of the invention is used as a demulsifier for demulsification treatment of oil-in-water emulsions, and further includes a demulsification treatment method and a composite material recycling method. Background technique [0002] Whether it is traditional crude oil extraction or unconventional oil and gas resource development, it will face the problem of subsequent dehydration treatment of oily sewage, that is, the dehydration treatment of oil-water emulsion, and the separation of water phase and oil phase can be completed by some means. After crude...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 刘娟任嗣利刘俊陈志文毛金水张卿洋李小成
Owner JIANGXI UNIV OF SCI & TECH