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Oil-removing compound and its preparation method

A compound, ionic polymer technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of reduced effect and increased dosage, and achieves the effect of low cost, strong charge affinity, and no three wastes discharge.

Inactive Publication Date: 2011-09-28
天津中油科远石油工程有限责任公司 +1
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Problems solved by technology

However, most of the above-mentioned demulsifiers are developed according to the specific water quality and have relatively strong pertinence. For example, the quaternary ammonium salt type cationic inverse demulsifier PEA- 01. Both the experimental results and field application show that this cationic inverse demulsifier is especially suitable for the oily sewage of Shenghua Refinery in Shengli Oilfield, and the application effect is good, but when it is used in other oilfield sewage, its effect is greatly reduced. raised

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  • Oil-removing compound and its preparation method

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preparation example Construction

[0018] The preparation method of the oil-removing compound of the present invention comprises ring-opening polymerization of dimethylamine or diethylamine and epichlorohydrin at -10-30°C and reacting for 0.5-4 hours; Linking agent, carry out cross-linking polymerization at 30-90°C, react for 3-10 hours to obtain epichlorohydrin amine cationic polymer; mix epichlorohydrin amine cationic polymer, polyacrylamide and Add the inorganic flocculant into water under stirring, and stir for 50-70 minutes to make it evenly mixed to obtain the oil-removing compound.

[0019] The preparation method of the oil removal compound of the present invention, wherein, the weight percentage of the dimethylamine or diethylamine is 45 to 70%, the weight percentage of epichlorohydrin is 30 to 50%, and the rest is a crosslinking agent; The weight percentage of the main agent epichlorohydrin amine cationic polymer is 20 to 50%, the weight percentage of polyacrylamide is 0 to 1%, the weight percentage of...

Embodiment 1

[0021] Add 200g dimethylamine (33% aqueous solution) in the reaction kettle, gradually add 200g epichlorohydrin to the reaction system under stirring, keep the temperature of the reaction system lower than 30°C, and react for 2 hours; after adding the epichlorohydrin dropwise 4.35 g of ethylenediamine was added to the reaction system, and reacted at 70° C. for 8 hours to obtain an epichlorohydrin amine cationic polymer containing 2% crosslinking agent ethylenediamine, as shown in Table 1. The obtained epichlorohydrin amine cationic polymer containing 2% cross-linking agent ethylenediamine, polyaluminum chloride, polyacrylamide and solvent distilled water are mixed in a weight ratio of 50:20:0.1:29.9, and mixed at 20-40 Stir at ℃ for 50-70 minutes to make it evenly mixed to obtain the oil-removing compound product of the present invention. Take 1mL of this product in 100mL of distilled water to make a 1% aqueous solution, take 5ml of the solution and stir in 1000ml of oily sewa...

Embodiment 2

[0026] Add 200g of diethylamine to the reaction kettle, gradually add 200g of epichlorohydrin to the reaction system under stirring, keep the temperature of the reaction system below 30°C, and react for 4 hours; after adding the epichlorohydrin dropwise, add Add 5.60g diethylenetriamine, react at 90 DEG C for 6 hours, obtain the epichlorohydrin amine cationic polymer containing 1.5% crosslinking agent diethylenetriamine, as shown in Table 2, contain crosslinking agent diethylenetriamine The epichlorohydrin amine cationic polymer infrared spectrum when 1.5% is attached figure 1 shown. Mix the obtained epichlorohydrin amine cationic polymer containing 1.5% crosslinking agent diethylenetriamine, polyaluminum chloride, polyacrylamide and distilled water in a mass ratio of 50:24:0.01:25.99, and mix them at 20~ Stir at 40°C for 50-70 minutes to make it evenly mixed to obtain the oil-removing compound product of the present invention. Take 1mL of this product in 100mL of distilled ...

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Abstract

An oil-removing compound and its preparation method. The compound is formed by combining 20-50 wt% of epichlorohydrin-amine cationic polymer, 0-1 wt% of polyacrylamide, 10-25 wt% of an inorganic flocculating agent and the balance water. The preparation method of the compound comprises the following steps of: performing a ring-opening polymerisation reaction between dimethylamine or diethylamine and epoxy chloropropane; adding a cross-linking agent into the reaction system to carry out a crosslinking polymerization reaction so as to obtain the epichlorohydrin-amine cationic polymer; mixing theepichlorohydrin-amine cationic polymer, polyacrylamide and the inorganic flocculating agent with stirring; and adding the mixture into water with stirring to obtain the compound. The compound provided by the invention can treat oil-containing sewage and is widely applied; the preparation method has advantages of mild synthesis condition, easy synthesis technology, low cost and no ''three wastes (waste gas, waste water and industrial residue)'' discharge, and conforms with the requirements of environmental protection.

Description

technical field [0001] The invention relates to an oil removal compound and a preparation method thereof. Background technique [0002] At present, the comprehensive water content of some oilfields in my country has reached more than 90%, and the amount of oil production sewage to be treated increases sharply every year. Moreover, with the gradual popularization and use of tertiary oil recovery technology, the difficulty of treatment of oil production sewage is also increasing. Inverted demulsifiers for sewage treatment can no longer meet the needs of oilfield production. The main performance is that the types of inverse demulsifiers suitable for oil-in-water (O / W) emulsion of oil production sewage are single and the performance is not ideal. Therefore, the development of degreasing agents suitable for oily sewage treatment has become an important direction of oilfield chemical research. A series of anti-phase demulsifiers for degreasing have been developed successively bot...

Claims

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Application Information

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IPC IPC(8): C02F1/56
Inventor 孟广伟严峰胡继宁张巧灵陈明姝张辉英
Owner 天津中油科远石油工程有限责任公司
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