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Method for preparing composite flocculant

A composite flocculant and inorganic flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of water quality not meeting discharge standards, slow separation speed of flocs, poor treatment effect, etc., and achieve high oil removal efficiency , The amount of scum generation is reduced, and the effect of cost reduction

Inactive Publication Date: 2006-12-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The widely used flocculants are polyacrylamide flocculants, or the combination of polyacrylamide flocculants and polyaluminum chloride, polyferric chloride, etc., but for oily sewage with high content of organic pollutants and fine mud, chemicals Large dosage, slow separation of flocs, poor treatment effect, water quality can not meet the discharge standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] In a 1 liter reactor, add 350g of diethylenetriamine, heat up to 100°C under stirring, pass in 300g of propylene oxide, control the temperature at 115-125°C, add it in 2 hours, keep it at 110°C for one hour, and cool A substituted amine A is formed.

[0011] Add 250g of polyethylene glycol with a molecular weight of 1000 to a 1000ml three-necked flask with stirring, thermometer and reflux tube, and then add 200g of 3-chloro-1,2-epoxypropane in 2 hours. The reaction temperature is 90-110 ℃, the reaction is completed at about 90 ℃ for 1 hour, the product is adduct B.

[0012] Add 150g of amine substitute A into a 500ml flask, stir and heat to 100°C, add 100g of adduct B in portions. The reaction temperature is 110-120°C, the reaction time is 2 hours, and the reactant is neutralized with 50 ml industrial hydrochloric acid after cooling.

Embodiment 2

[0014] At room temperature, 130ml of the product of Example 1 and 100ml of 50% (weight) polyferric sulfate solution are added to the reactor, and then 10ml of water and 8ml of isopropanol are added, and the finished product is stirred evenly.

Embodiment 3

[0016] At room temperature, 100 ml of the polymer of Example 1 and 70 ml of 30% (weight) polyaluminum chloride solution were added to the reactor, and about 10 ml of water and 9 ml of isopropanol were added. Stir evenly to be the finished product.

[0017] The application effect evaluation of the above-mentioned flocculant is carried out by the conventional bottle test method, and the dosage range of the flocculant is 10-3000ppm according to the composition and stability of oily sewage. The flocculants of the present invention all show good demulsification performance and oil removal effect, and the technical cost is low.

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PUM

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Abstract

A preparing method of composite flocculating agent includes that substitute amine A produced by the reaction of amine and epoxypropane reacts with adduct B produced by the reaction of carbowax molecular weight of which is 500-1000 and epichlorohydrin with inverse flow, the product of which can be used for flocculating agent directly after neutralization of commercial alcaine or acetic acid, wherein inorganic flocculants account for 5-40 mass%, that has strong demulsifying effect for oily wastewater of oil-in-water or water-in-oil, and rapid flocculating separation effect for oily wastewater contained more fatlute, after that the wastewater with low turbidity and little scum contains much oil.

Description

Technical field [0001] The invention relates to a preparation method of a composite flocculant for treating oily sewage, in particular to a preparation method of a composite flocculant. Background technique [0002] With the development of oil fields, the oil fields have entered a period of high water cut development. The amount of water produced has increased while producing a large amount of oily sewage. In this type of emulsion, water is the continuous phase and oil is the dispersed phase, which is very stable. In addition, as the raw materials processed by the petroleum processing industry are re-qualified, a large amount of oily wastewater is generated, and the degree of emulsification of oily wastewater is also increasing. The treatment of this kind of sewage usually adopts the method of adding chemical flocculants to demulsify and remove the organic or inorganic pollutants dispersed in the sewage. The widely used flocculants are polyacrylamide flocculants, or polyacrylamid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54
Inventor 杜建卫刘键
Owner PETROCHINA CO LTD
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