CN103808586A

CN103808586A - Method for testing de-scaling performance of EDTA (Ethylene Diamine Tetraacetic Acid) disodium salt surfactant

Info

Publication number: CN103808586A
Application number: CN201210484180.6A
Authority: CN
Inventors: 唐丽华
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2014-05-21

Abstract

The invention discloses a method for testing a de-scaling performance of an EDTA (Ethylene Diamine Tetraacetic Acid) disodium salt surfactant. The method comprises the following steps: (a) selecting experimental containers; (b) respectively dripping OP-10 (polyoxyethyleneoctylphenyl-10) and EDTA (Ethylene Diamine Tetraacetic Acid) disodium salt into the experimental containers according to the ratio ranging from (2:5) to (4:3); (c) respectively adding distilled water into the experimental containers; uniformly shaking; (d) respectively and slowly dripping prepared NaOH; adjusting the pH (Potential of Hydrogen) value; (e) putting the experimental containers into a water bath and respectively adding barium sulfate scale for reacting for a period of time; (f) after the reaction is finished, filtering, drying and weighing; recording related reaction phenomena and data; and (g) analyzing the related data and reaction phenomena so as to obtain the de-scaling performance of the surfactant. The method disclosed by the invention can be used for rapidly testing the de-scaling performance of the OP-10 and EDTA binary compound surfactant; the result is accurate and the testing time is short; the testing cost is greatly reduced; the method provides the theoretical basis for de-scaling by utilizing the binary compound surfactant.

Description

The method of test EDETATE SODIUM salt surfactant scale removal performance

Technical field

The present invention relates to a kind of method of testing EDETATE SODIUM salt surfactant scale removal performance.

Background technology

Scale remover is a kind of incrustation scale of removing, and the chemicals of the multiple dirt stain such as dirt, generally forms by various ingredients is composite.Industrial scale remover is mainly used in removing heat transmission equipment, the dirt in boiler etc.

The conventional kind of scale remover and feature thereof:

(1) inorganic polyphosphate.This type of is the scale remover using the earliest, and external oneself restriction is used.In its molecule, there is the P-O-P key of one or more repetitions to exist, can be divided into chain Quadrafos and cyclic polyphosphates.The shortcoming of inorganic polyphosphate is that moisture-sensitive hydrolysis generates orthophosphate, under high temperature and high pH value, more so, reacts and fouling as Ca2+, Mg2+ etc. with bivalent cation.

(2) organophosphate.The machine phosphate of common are has monoalkyl phosphoric acid esters, bisalkyl phosphate, pyrophosphate, polyoxyethylene aliphatic ether phosphate etc.In organophosphate, P-O-C key is stronger than phosphate P-O-P key, and therefore it is than phosphate-stabilized, and hydrolysis temperature is higher than phosphate.Seemingly, when use, consumption is unsuitable too high for the much character of phosphate and phosphoric acid salt, the too high dirt that easily generates on the contrary.Phosphate easily adheres to equipment surface, good with the compatibility of corrosion inhibiter etc., but easily there is emulsification with oils, so need to add non-emulsifier while use in oil field, hydrolysis phenomenon that can be resemble inorganic polyphosphate in the time that temperature exceedes 90 ℃, its hydrolysate also can react and fouling with divalent metal.Strontium sulfate white crystalline powder.Odorlessness.1g is dissolved in about 8800ml water, 700ml3% nitric acid, 800ml2% hydrochloric acid, is slightly soluble in alkali chloride solution, concentrated acid, is insoluble to ethanol and dilute sulfuric acid.Relative density 3.96.1605 ℃ of fusing points.Index of refraction 1.624.

(3) organic multicomponent phosphonic acids.C-P key in phosphonic acids is firm, therefore has higher chemical stability and thermal stability, also difficult hydrolysis under high temperature, high pH value condition, nontoxic or low toxicity.For example ethylenediamine tetraacetic methene phosphoric acid still can keep its activity under the high temperature of 200 ℃ and 1013kPa; Carboxyl ethylene-diphosphonic acid just decomposes under the high temperature of 250 ℃.Such scale remover is effective, and dosing is little, and has corrosion inhibition concurrently.Oneself is widely used in oil field water treatment.

(4) aminopolycanboxylic acid's salt.Aminopolycanboxylic acid's salt is a kind of scale remover of better heat stability, as the serviceability temperature of EDTA can reach 200 ℃.This type of scale remover is mainly that the amount therefore adding is many by huge legendary turtle cooperation antiscale, and cost is high, so use and be restricted in the industrial process of a large amount of waters.

21 century China's surfactant and detergent industry Challenge, also exist opportunity simultaneously.In China, surfactant is most of for detergent industry, but abroad, accounts for 40% left and right for industrial surfactant.For example, nineteen ninety-five West Europe industrial surfactant consumption figure be approximately 900kt, account for 43% of total surfactant consumption figure.This shows that the application of surfactant in industry also has very large development space.So, adjustment form surface-active agent product structure, exploitation surfactant new product is extremely important.

Oil is industrial " blood ", is the lifeblood of the national economic development.Petroleum Production can be divided into defeated 3 processes of drilling well, oil recovery and collection.In these production runes, often solve with surfactant the problem existing, need to use a large amount of surfactants for this reason, surfactant, in the widespread use in oil field, has utilized its special physicochemical property just.Its pressure break in oil field, adjust stifled, drilling well, the displacement of reservoir oil etc. to obtain application aspect many.

Summary of the invention

The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of method of testing EDETATE SODIUM salt surfactant scale removal performance is provided, the method of this test EDETATE SODIUM salt surfactant scale removal performance can test out the scale removal performance of OP-10 and EDETATE DISODIUM binary built surfactant fast, and result is accurate, test duration is short, reduce testing cost, for binary built surfactant provides theoretical foundation for scale removal.

Object of the present invention is achieved through the following technical solutions: a kind of method of testing EDETATE SODIUM salt surfactant scale removal performance, comprises the following steps:

(a) choose experiment container, and cleaning-drying is for subsequent use;

(b) according to the ratio of 2: 5～4: 3, OP-10 and EDETATE DISODIUM are added drop-wise to respectively in experiment container;

(c) in experiment container, add distilled water respectively, shake up, warm water dissolves;

(d) NaOH that then slowly dropping has configured respectively, regulates pH value;

(e) experiment container is placed in to water-bath, adds respectively barium sulfate scale, reaction a period of time;

(f) after completion of the reaction, carry out suction filtration, dry, weigh, record relevant reacting phenomenon and data;

(g) analyze related data and reacting phenomenon, thereby draw the scale removal performance of surfactant.

Described experiment container is conical flask.

In described step (c), the addition of distilled water is 200ml.

In described step (d), regulate pH value to 8.

In described step (e), bath temperature is 40 ℃, and the water-bath time is 24h.

The ratio of described OP-10 and EDETATE DISODIUM is 2: 5,5: 9, and 3: 4,8: 7,4: 3.

In sum, the invention has the beneficial effects as follows: can test out fast the scale removal performance of OP-10 and DTA disodium salt binary built surfactant, and result is accurate, the test duration is short, reduce testing cost, for binary built surfactant provides theoretical foundation for scale removal.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.

Embodiment:

A kind of method of testing EDETATE SODIUM salt surfactant scale removal performance the present invention relates to, comprises the following steps:

(a) choose experiment container, and cleaning-drying is for subsequent use;

Described experiment container is conical flask.

In described step (c), the addition of distilled water is 200ml.

In described step (d), regulate pH value to 8.

The experimental data being drawn by above-mentioned steps is as shown in the table:

In experiment, react after 8 hours, some foam when bottle 1 shakes up, conical flask bottom also has a certain amount of barium sulfate scale, and there is emulsion in solution; After reaction 24h, some foam in bottle while shaking up, without floating grease, smooth when suction filtration, after suction filtration finishes, on filter paper, be some bulky grain dirts.React after 8 hours, bottle 2 has a small amount of foam while shaking up, and a large amount of dirts is also wanted in conical flask bottom; After reaction 24h, while shaking up, in bottle, there is a small amount of foam, without floating grease, more difficult when suction filtration, after suction filtration finishes, on filter paper, be some bulky grain dirts.React after 8 hours, bottle 3 has a small amount of foam while shaking up, and conical flask bottom also has a large amount of dirts; After reaction 24h, some foam in bottle while shaking up, has a small amount of floating grease, more difficult when suction filtration, after suction filtration finishes, is some bulky grain dirts on filter paper.

As seen from the above table: the composite effect of OP-10 and EDETATE DISODIUM is better, contrast can find out that the effect of its binary built is very large, may be that reciprocation has occurred both groups.Along with the increase of the quality of EDETATE DISODIUM, descaling rate to barium sulfate scale increases gradually, be 5: 9 o'clock to ratio, be formula 3 o'clock, reach mxm., and the quality of EDETATE DISODIUM increases again, descaling rate rises very little, also there will be certain decline on the contrary, considers, the ratio of OP-10 of the present invention and EDETATE DISODIUM is chosen as 2: 5～and 4: 3, and take 5: 9 as best.

The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.

Claims

1. the method for test EDETATE SODIUM salt surfactant scale removal performance, is characterized in that, comprises the following steps:

(a) choose experiment container, and cleaning-drying is for subsequent use;

2. the method for test EDETATE SODIUM salt surfactant scale removal performance according to claim 1, is characterized in that, described experiment container is conical flask.

3. the method for test EDETATE SODIUM salt surfactant scale removal performance according to claim 1, is characterized in that, in described step (c), the addition of distilled water is 200ml.

4. the method for test EDETATE SODIUM salt surfactant scale removal performance according to claim 1, is characterized in that, in described step (d), regulates pH value to 8.

5. the method for test EDETATE SODIUM salt surfactant scale removal performance according to claim 1, is characterized in that, in described step (e), bath temperature is 40 ℃, and the water-bath time is 24h.

6. the method for test EDETATE SODIUM salt surfactant scale removal performance according to claim 1, is characterized in that, the ratio of described OP-10 and EDETATE DISODIUM is 2: 5,5: 9, and 3: 4,8: 7,4: 3.