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Composite reverse-phase demulsifying agent for treating oil refinery sewage and preparation method of composite reverse-phase demulsifying agent

A reverse-phase demulsifier, oil refinery technology, applied in the direction of separation method, grease/oily substance/suspended matter removal device, liquid separation, etc., can solve the problem of high consumption of reverse-phase demulsifier, high oil removal rate and long processing time etc. to achieve good deoiling effect, good surface activity and strong demulsification ability

Inactive Publication Date: 2015-07-22
金浦新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the purpose of the present invention is to solve the problem that the amount of anti-phase demulsifier for processing oil refinery sewage is high and the treatment time is long, and a kind of composite anti-phase demulsifier and its preparation method for processing oil refinery sewage are provided. The phase demulsifier can quickly separate the crude oil in the sewage, and the oil removal rate in the water is high, so that the quality of the treated water can be improved to meet the discharge or recycling standard

Method used

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  • Composite reverse-phase demulsifying agent for treating oil refinery sewage and preparation method of composite reverse-phase demulsifying agent
  • Composite reverse-phase demulsifying agent for treating oil refinery sewage and preparation method of composite reverse-phase demulsifying agent
  • Composite reverse-phase demulsifying agent for treating oil refinery sewage and preparation method of composite reverse-phase demulsifying agent

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Effect test

Embodiment 1

[0015] First take by weighing 0.1% polyaluminum ferric silicate, 0.1% polydimethyldiallylammonium chloride and 1% cationic polyacrylamide, which account for the mass fraction of inverse demulsifier, and mix the polyacrylamide in a stirred tank. Dissolve ferric aluminum silicate in water, keep low-speed spiral stirring (60-200 rpm), then continue to add polydimethyldiallyl ammonium chloride until completely dissolved, finally slowly add cationic polyacrylamide, stir until A completely homogeneous aqueous solution, that is, a composite inverse demulsifier for the treatment of refinery sewage.

[0016] The obtained inverse demulsifier is applied to the oily sewage of the delayed coking unit according to SY / T 0530-2011 oilfield produced water oil content determination method-spectrophotometry. When the dosage is 30ppm, the oil removal rate in water is 94.3%. When the dosage is 100ppm, the removal rate of oil in water is 95.2%, and when the dosage is 300ppm, the removal ratio of oi...

Embodiment 2

[0018] First, take by weighing 1% polyaluminum ferric silicate, 0.1% polydimethyldiallyl ammonium chloride and 1% cationic polyacrylamide, which account for the mass fraction of the inverse demulsifier. Dissolve ferric aluminum silicate in water, keep low-speed spiral stirring (60-200 rpm), then continue to add polydimethyldiallyl ammonium chloride until completely dissolved, finally slowly add cationic polyacrylamide, stir until A completely homogeneous aqueous solution, that is, a composite inverse demulsifier for the treatment of refinery sewage.

[0019] The obtained inverse demulsifier is applied to the oily sewage of the delayed coking unit according to SY / T 0530-2011 oilfield produced water oil content determination method-spectrophotometry. When the dosage is 30ppm, the oil removal rate in water is 94.5%. When the dosage is 100ppm, the removal rate of oil in water is 95.0%, and when the dosage is 300ppm, the removal ratio of oil in water is 97.4%.

Embodiment 3

[0021] Firstly, take respectively 0.1% polyaluminum iron silicate, 0.5% polydimethyldiallyl ammonium chloride and 1% cationic polyacrylamide, which account for the mass fraction of the inverse demulsifier, and mix the polyacrylamide in a stirred tank. Dissolve ferric aluminum silicate in water, keep low-speed spiral stirring (60-200 rpm), then continue to add polydimethyldiallyl ammonium chloride until completely dissolved, finally slowly add cationic polyacrylamide, stir until A completely homogeneous aqueous solution, that is, a composite inverse demulsifier for the treatment of refinery sewage.

[0022] The obtained inverse demulsifier is applied to the oily sewage of the delayed coking unit according to SY / T 0530-2011 oilfield produced water oil content determination method-spectrophotometry. When the dosage is 30ppm, the oil removal rate in water is 94.5%. When the dosage is 100ppm, the removal rate of oil in water is 95.0%, and when the dosage is 300ppm, the removal rati...

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Abstract

The invention discloses a composite reverse-phase demulsifying agent for treating oil refinery sewage and a preparation method of the Composite reverse-phase demulsifying agent. The composite reverse-phase demulsifying agent is a water solution comprising 0.1-1 percent by mass of polyaluminum ferric silicate, 0.1-0.5 percent by mass of poly-dimethyl diallyl ammonium chloride and 0.1-1 percent by mass of cationic polyacrylamide, wherein in the polyaluminum ferric silicate, the content of Al2O3 is more than or equal to 28 percent, the content of SiO2 is 5-8 percent, and the content of Fe2O3 is 3-5 percent. The invention further discloses a preparation method of the reverse-phase demulsifying agent. The organic and inorganic composite reverse-phase demulsifying agent prepared by the preparation method is simple in preparation process, good in surface activity, high in demulsifying capacity, good in de-oiling effect, obvious in quality of the treated sewage and excellent in performance of shortening the time required for demulsification.

Description

technical field [0001] The invention belongs to the technical field of water pollution prevention and water treatment, and in particular relates to a compound reverse-phase demulsifier for treating oil refinery sewage and a preparation method thereof. Background technique [0002] In recent years, with the development of the petroleum industry, especially due to the application of enhanced water injection oil recovery technology, especially thermal recovery technology, the water content of crude oil emulsion has increased significantly. In the prior art, in the later stages of secondary oil recovery and tertiary oil recovery, various production stimulation measures such as acidification, fracturing, water shutoff, and profile control were implemented, various chemical flooding injections and the increase in the proportion of heavy oil were implemented. It is also becoming more and more complicated. In addition, the use of various pumps in the process of mining and transporta...

Claims

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Application Information

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IPC IPC(8): C02F1/40
Inventor 吴倩余志兵康国培葛圣才刘树龙
Owner 金浦新材料股份有限公司
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