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A kind of inorganic-organic composite demulsifier and its preparation and application method

A composite, demulsifier technology, applied in separation methods, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high oil content in treated water, low demulsifier efficiency, etc. Clear oil-water interface and low oil content

Inactive Publication Date: 2019-01-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing demulsifiers used in the oily wastewater treatment of major petroleum and petrochemical enterprises in and outside the province generally have low efficiency and high oil content in the treated water.

Method used

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  • A kind of inorganic-organic composite demulsifier and its preparation and application method
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  • A kind of inorganic-organic composite demulsifier and its preparation and application method

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Effect test

Embodiment 1

[0019] An inorganic-organic composite demulsifier, wherein the mass ratio of polysilicon aluminum iron and propylene glycol polyether is (49-54):100.

[0020] A kind of inorganic-organic composite type demulsifier, its preparation method comprises the steps:

[0021] (1) Preparation of modified activated silicic acid: take 90g of water glass and add 500ml of water to dissolve under stirring conditions to obtain a dilute solution of water glass; measure 1+5 sulfuric acid (1 volume of concentrated sulfuric acid+5 volumes of distilled water and shake well) 1000ml, add the water glass solution into the sulfuric acid solution, and stir vigorously at a rate of 120rad / min at the same time; after the reaction, let it stand for 30min to obtain activated silicic acid. in triplicate.

[0022] (2) Preparation of polysilicon aluminum iron:

[0023] A. Measure 500ml of activated silicic acid, add 38g of aluminum sulfate and 18g of ferric chloride under the condition of stirring at 60rad / m...

Embodiment 2

[0035] An inorganic-organic composite demulsifier, wherein the mass ratio of polysilicon aluminum iron and propylene glycol polyether is 50:100.

[0036] A kind of inorganic-organic composite type demulsifier, its preparation method comprises the steps:

[0037] (1) Preparation of activated silicic acid: Weigh 90 g of water glass and add 500 ml of water to dissolve under stirring conditions to obtain a water glass dilute solution. Measure 1000ml of 1+5 sulfuric acid (1 volume of concentrated sulfuric acid + 5 volumes of distilled water and shake well), add the water glass solution into the sulfuric acid solution, and stir vigorously at a speed of 80rad / min at the same time. The activated silicic acid was obtained after standing for 1 hour after the reaction. in triplicate.

[0038] (2) Preparation of polysilicon aluminum iron:

[0039] A. Measure 500ml of activated silicic acid, add 38g of aluminum sulfate and 18g of ferric chloride under the condition of stirring at 60rad / ...

Embodiment 3

[0051] An inorganic-organic composite demulsifier, wherein the mass ratio of polysilicon aluminum iron and propylene glycol polyether is 50:100.

[0052] A kind of inorganic-organic composite type demulsifier, its preparation method comprises the steps:

[0053] (1) Preparation of activated silicic acid: Weigh 90 g of water glass and add 500 ml of water to dissolve under stirring conditions to obtain a water glass dilute solution. Measure 1000ml of 1+5 sulfuric acid (1 volume of concentrated sulfuric acid + 5 volumes of distilled water and shake well), add the water glass solution into the sulfuric acid solution, and stir vigorously at a speed of 120rad / min at the same time. After the reaction, the activated silicic acid was obtained after standing for 30 minutes. in triplicate.

[0054] (2) Preparation of polysilicon aluminum iron:

[0055] A. Measure 500ml of activated silicic acid, add 38g of aluminum sulfate and 18g of ferric chloride under the condition of stirring at ...

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Abstract

The invention relates to the technical field of oil-containing wastewater treatment, in particular to an inorganic and organic compound demulsifying agent and a preparation method thereof. The inorganic and organic compound demulsifying agent is prepared from polyaluminum ferric silicate and propylene glycol polyether. Polyaluminum ferric silicate and propylene glycol polyether are mixed under the stirring condition to generate the polyaluminum ferric silicate and propylene glycol polyether demulsifying agent. The use quantity of the demulsifying agent is small, the use range is wide, the effect is good, dehydration speed is high, and the demulsifying agent has the low-temperature demulsifying effect.

Description

technical field [0001] The invention relates to the technical field of oily wastewater treatment, in particular to an inorganic-organic composite demulsifier and its preparation and application methods. Background technique [0002] Oily wastewater mainly includes oilfield wastewater, wastewater from refineries and petrochemical plants. The relative density of oil pollutants in wastewater is less than 1 except for heavy tar, which is above 1.1. Generally, the oil content in sewage is 1-20%, and the water content is 80-99%. The oily wastewater will settle together with the suspended particles and iron oxide scale in the wastewater in the process facilities and pipeline equipment, forming a sticky sludge mass. Blockage of pipelines and equipment affects the normal production; when oily wastewater is discharged into the water body, an oil film will form on the water surface, which can hinder the reoxygenation of the water body. Due to the reduction of dissolved oxygen in the wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/40C02F1/56C02F1/52
CPCC02F1/40C02F1/5236C02F1/56
Inventor 李孟陈琪
Owner WUHAN UNIV OF TECH