CN103937536A - Novel high efficiency crude oil demulsifier - Google Patents

Abstract

The invention provides a novel high efficiency crude oil demulsifier, which comprises the following raw materials: 35-45 parts of 2,4-toluene diisocyanate, 50-65 parts of ethyl acetate, 35-50 parts of polyethylene polyamine and 3-7 parts of ammonium persulfate. A preparation method comprises the following steps: adding 2,4-toluene diisocyanate and ethyl acetate in a reaction vessel in order, stirring for 30 minutes, heating to the temperature of 42-48 DEG C, adding polyethylene polyamine and ammonium persulfate, keeping the constant temperature to 42-48 DEG C, stirring for 4 hours, and cooling to the room temperature to obtain the viscous de-emulsifier product.

Description

A kind of new and effective crude oil demulsifier

Technical field

The present invention relates to petroleum demulsifier, the especially disposal to crude oil, makes crude oil be plucked out of with form of emulsion, and after using, effect is very remarkable.

Background technology

In order to meet the growing demand of oil, improve oil recovery, people have researched and developed multiple oil recovery technique, comprise the methods such as filled drive, steam flood, chemical flooding, and these methods finally all make crude oil be plucked out of with form of emulsion.

According to statistics, the crude oil that the world exploits out has nearly 80% to exist with crude oil emulsion form.The existence of oil-water emulsion, will increase the burden of accumulating, and in the work-ing life of reducing pipeline, therefore, crude oil demulsification dehydration is link indispensable in field produces.

Crude oil demulsification technology is accompanied by the development of crude oil development, has formed so far a lot of maturation methods, probably can be divided into Physical, biological process and chemical method: physical method mainly contains gravity, centrifugal, heating and electric, ultrasonic, microwave demulsifying etc.; Biological demulsifying mainly makes crude oil emulsion breaking emulsion and dewatering by adding biological culture fermentation to destroy oil-water interfacial film; Chemical demulsification is by adding one or more surfactants, or the pH value that regulates milk sap makes it that breaking emulsion and dewatering occur, emulsion splitter molecule infiltrates and sticks on the interface of emulsion droplet, displace emulsifying agent failure surface film, disperse phase is discharged and coalescent, phase-splitting, finally reach the object being respectively separated.Comparatively speaking, chemical demulsification has excellent performance, consumption is few, Financial cost is lower, be used in conjunction with and can obtain good demulsification with other demulsification technology, along with deepening continuously of chemical demulsification mechanism, multidisciplinary by combining, multiple test analysis means, will synthesize strong, the efficient chemical demulsifier of more universalities.

The Novel crude oil demulsifier of the present invention design and preparation can solve that the existing breakdown of emulsion time is long, and dehydration rate is low, the high drawback of the water quality oleaginousness of dewatering, to crude production with collect the defeated tool effect that improves significantly.

Summary of the invention

The object of the invention is to: for the deficiencies in the prior art, the emulsion splitter of preparation has that de-emulsification speed is fast and dehydration rate is high, and the water quality of dewatering is good, and under low temperature, result of use is good.

The object of the present invention is achieved like this: a kind of new and effective crude oil demulsifier, with parts by weight batching, implement step by step;

Raw material: by 2,4-toluene-2,4-diisocyanate 35-45 part, ethyl acetate 50-65 part, polyethylene polyamine 35-50 part, ammonium persulphate 3-7 part composition;

Preparation: 2,4-toluene-2,4-diisocyanate, ethyl acetate are added in reactor successively, stir 30min, be warming up to 45 ± 3 DEG C, add polyethylene polyamine and ammonium persulphate, constant temperature to 45 ± 3 DEG C, stir after 4h, are down to room temperature, obtain thick emulsion splitter finished product.

The raw material of described base oildeemulsifier in high performance is commercially available prod.

The Novel crude oil demulsifier of the present invention design, has evaded the currently available products breakdown of emulsion time long, and dehydration rate is low, and the drawback of dehydration water quality inferiority to crude production with collect the defeated tool effect that improves significantly, shows technical progress.

Embodiment

The present invention is described further in conjunction with the embodiments.

Embodiment 1

By 2,50 parts of 35 parts of 4-toluene-2,4-diisocyanates, ethyl acetate add successively and in reactor, stir 30min, be warming up to 45 ± 3 DEG C and add 35 parts of polyethylene polyamines, 3 parts of continuation constant temperature to 45 ± 3 DEG C of ammonium persulphate to stir 4h, be cooled to room temperature, obtain thick Novel crude oil demulsifier; Be numbered A.

Embodiment 2

By 2,57 parts of 40 parts of 4-toluene-2,4-diisocyanates, ethyl acetate add successively and in reactor, stir 30min, be warming up to 45 ± 3 DEG C and add 43 parts of polyethylene polyamines, 5 parts of continuation constant temperature to 45 ± 3 DEG C of ammonium persulphate to stir 4h, be cooled to room temperature, obtain thick Novel crude oil demulsifier; Be numbered B.

Embodiment 3

By 2,65 parts of 45 parts of 4-toluene-2,4-diisocyanates, ethyl acetate add successively and in reactor, stir 30min, be warming up to 45 ± 3 DEG C and add 7 parts of 50 parts of polyethylene polyamines, ammonium persulphate to continue constant temperature to 45 ± 3 DEG C to stir 4h, be cooled to room temperature, both thick Novel crude oil demulsifier; Be numbered C.

Crude oil sample comes the lucky 7 wellblock viscous crude mixing oil samples in oil field, autocollimatic east, crude oil water containing 32.26%; By bottle examination method, A, B, C and the on-the-spot emulsion splitter that uses are carried out to evaluation experimental, the results are shown in Table 1,2,3.

Table 1

Breakdown of emulsion formulation

Test temperature

Consumption

Different time dehydration rate

Dehydration water quality

[0022]?

Number	Degree/DEG C	/ppm	30min	60min	90min	2h	4h	Interface	Water colour
										Blank	50	0	0	0	0	0	0	/	/
A	50	50	42.2	53.6	75.9	85.6	88.6	Together	Clearly
										B	50	50	45.6	55.3	76.8	88.2	89.6	Together	Clearly
C	50	50	43.2	54.3	76.2	86.3	89.4	Together	Clearly
										On-the-spot sample	50	50	18.6	25.2	56.2	75.8	86.2	Neater	More clear

Table 2

Table 3

Result by table 1, table 2, table 3 can find out, novel emulsion splitter crude oil of the present invention has good demulsification performance, especially emulsion splitter B, and under 55 DEG C of conditions, 2h just can reach 88.6% demulsification, and dehydration water quality is good.

This product meets the standard of SY/T5280-2000, SY/T5281-2000.

Claims (2)

1. a new and effective crude oil demulsifier, is characterized in that: with parts by weight batching, implement step by step;

Raw material: by 2,4-toluene-2,4-diisocyanate 35-45 part, ethyl acetate 50-65 part, polyethylene polyamine 35-50 part, ammonium persulphate 3-7 part composition;

Preparation: 2,4-toluene-2,4-diisocyanate, ethyl acetate are added in reactor successively, stir 30min, be warming up to 45 ± 3 DEG C, add polyethylene polyamine and ammonium persulphate, constant temperature to 45 ± 3 DEG C, stir after 4h, are down to room temperature, obtain thick emulsion splitter finished product.

2. base oildeemulsifier in high performance according to claim 1, is characterized in that: the raw material that this product is selected is commercially available prod.