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Reduced graphene oxide/nano-TiO2 composite demulsifier and preparation method thereof

A composite demulsification and graphene technology, which is applied in the direction of chemical dehydration/demulsification, graphene, titanium oxide/hydroxide, etc., can solve the problem of poor demulsification performance, toxic and harmful substances, and polymer demulsifiers. Degradation and other problems, to achieve high salt resistance, easy storage and transportation

Active Publication Date: 2019-11-22
YANGTZE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome above-mentioned technical deficiency, proposes a kind of reduced graphene oxide / nanometer TiO 2 Composite demulsifier to solve the technical problems of poor demulsification performance of simple inorganic demulsifiers in the prior art, polymer demulsifiers will degrade to produce toxic and harmful substances, and pollute the environment

Method used

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  • Reduced graphene oxide/nano-TiO2 composite demulsifier and preparation method thereof
  • Reduced graphene oxide/nano-TiO2 composite demulsifier and preparation method thereof
  • Reduced graphene oxide/nano-TiO2 composite demulsifier and preparation method thereof

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preparation example Construction

[0019] Such as figure 1 , figure 1 It is the reduced graphene oxide / nano-TiO of the present invention 2 Flow chart of the preparation method of the composite demulsifier. In the first aspect, the present invention provides a reduced graphene oxide / nano-TiO 2 The preparation method of compound demulsifier, described method comprises the following steps:

[0020] (1) prepare the graphene oxide that surface has carboxyl group and hydroxyl group;

[0021] (2) Nano-TiO generated by in-situ hydrolysis of organic titanium precursors 2 Carry out surface modification to described graphene oxide, carry out hydrothermal reduction then, obtain reduced graphene oxide / nanometer TiO 2 Compound demulsifier.

[0022] According to the present invention, the described preparation surface of step (1) has the graphene oxide of carboxyl group and hydroxyl group, comprises the following steps:

[0023] (a) 25 parts by weight of NaNO 3 , 20 parts by weight of flake graphite and 180 parts by w...

Embodiment 1

[0050] This embodiment provides a reduced graphene oxide / nano-TiO 2 Composite demulsifier, described demulsifier obtains through the following steps:

[0051] 25 parts by weight of NaNO 3 and 20 parts by weight of graphite flakes were added to 180 parts by weight of 95% concentrated H 2 SO 4 , stir evenly to obtain the mixed solution I; slowly add 15 parts by weight of KMnO to the above mixed solution I 4 , and control the temperature of the reaction mixture at 13°C, and then continuously stir at room temperature for 24 hours, then add 180 parts by weight of deionized water to obtain the mixed solution II; raise the temperature of the above mixed solution II to 100°C and keep it warm for 1 hour , followed by cooling to 70°C, adding 80 parts by weight of 35% H 2 o 2 , mixed evenly, continued to react for 1 h after natural cooling to room temperature, after the reaction was completed, the graphene oxide sol was obtained by washing and centrifuging.

[0052] Add 20 parts by...

Embodiment 2

[0055] This embodiment provides a reduced graphene oxide / nano-TiO 2 Composite demulsifier, described demulsifier obtains through the following steps:

[0056] 25 parts by weight of NaNO 3 and 20 parts by weight of graphite flakes were added to 180 parts by weight of 95% concentrated H 2 SO 4 , stir evenly to obtain the mixed solution I; slowly add 15 parts by weight of KMnO to the above mixed solution I 4 , and control the temperature of the reaction mixture at 15°C, then continuously stir at room temperature for 24 hours, then add 180 parts by weight of deionized water to obtain the mixed solution II; raise the temperature of the above mixed solution II to 100°C and keep it warm for 1 hour , followed by cooling to 70°C, adding 80 parts by weight of 35% H 2 o 2 , mixed evenly, continued to react for 1 h after natural cooling to room temperature, after the reaction was completed, the graphene oxide sol was obtained by washing and centrifuging.

[0057] Add 20 parts by wei...

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Abstract

The invention discloses a reduced graphene oxide / nano TiO2 composite demulsifier and a preparation method thereof. The preparation method comprises the following steps: preparing graphene oxide with carboxyl and hydroxyl on the surface; performing surface modification with nano TiO2 generated by in-situ hydrolysis of an organic titanium precursor on graphene oxide, and then carrying out hydrothermal reduction to obtain the reduced graphene oxide / nano TiO2 composite demulsifier. The invention also provides the reduced graphene oxide / nano TiO2 composite demulsifier obtained by the method. The demulsifier provided by the invention has the characteristics of high efficiency and environmental protection, does not pollute the environment, can be suitable for neutral and acidic conditions, and has high salt tolerance; and meanwhile, the demulsifier can be transferred into an oil phase after demulsification, so that the demulsifier is prevented from staying in a water phase to influence subsequent use of the water phase.

Description

technical field [0001] The invention relates to oilfield chemicals, in particular to a reduced graphene oxide / nano-TiO 2 Composite material demulsifier and preparation method thereof. Background technique [0002] In the early days of oil production, researchers were primarily concerned with the demulsification of water-in-oil emulsions resulting from the development of oilfields with less water content. However, with the over-exploitation of traditional fossil fuels and the gradual aging of oilfields, technologies and methods are constantly innovating, such as tertiary oil recovery technology is widely used to increase production in my country and other countries. Introducing steam, water, and extraction aids into the reservoir produces a stable oil-in-water emulsion in large quantities. In addition, conventional oil field development and industrial refineries also generate large amounts of oily wastewater. All oily wastewater poses serious environmental problems and req...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01G23/053B82Y30/00C10G33/04
CPCB82Y30/00C01G23/053C10G33/04C01B32/184
Inventor 米远祝叶泛王振汉匡家哲江夏黄志明谢芳琴袁怀奎张泽俊
Owner YANGTZE UNIVERSITY
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