SU1051095A1 - 2-hydroxypropylene-1,3-diamino-n,n-diacetic-n,n-dimethylenephosphonic acid as water-soluble amphoteric electrode - Google Patents

Description

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The invention relates to the chemistry of organophosphorus compounds, namely 2-hydroxypropylene-1,5-diamino-H, M-diacetic M, m-dimethylene phosphonic acid (1), which can be used as a water-soluble amphoteric electrolyte in the oil industry. It is known to use as a water-soluble amphoteric electrolyte 2-hydroxypropylene-1, 3-diamino-N, N -N, N-tetraacetic acid (ODTA) ij The disadvantages of this electrolyte are very high rate of interaction with carbonate rocks and , as a result, insufficiently deep penetration deep into the reservoir when processing the bottomhole zone. The closest to the proposed structure is ethylenediamineC, H-diacetic - N, H-dimethylphosphonic acid of the formula (JHfPOsH HOOd-JHf HNRODN which is used as an organic reagent for the determination of metal cations 2; Using a known compound as a water-soluble amphoteric electrolyte The purpose of the invention is to monitor the effectiveness of a water-soluble amphoteric electrolyte. The goal is achieved by using a compound of the formula T as a water-soluble amphoteric electrolyte. olita. The compound has a reduced rate of interaction with carbonate rocks, providing deep penetration of the reagent into the formation and increasing well productivity. 2-Oxypropylene-1,3-diamino-M, N-DIUxus-M, 1H-dimethylene phosphonic acid (ODUMF) is obtained by the interaction M - (2-acetic} -aminomethylenephosphonic acid with epichlorohydrin in an aqueous medium while heating ipo. Example. A four-necked flask equipped with a stirrer, a reflux condenser, a thermometer and a dropping funnel is charged with 116.6 g of N- (2-acetic) -aminomethyl enophosphonic acid and 180 ml of distilled water. The pH is adjusted to 7.8-8 by the addition of a concentrated solution of sodium hydroxide, heated to and 37 g of epichlorohydrin are added dropwise at this temperature. After the completion of the dropping, the reaction mixture was kept at this temperature for 4 hours, maintaining the pH at 7.8-8. After superheating, the reaction mixture is acidified with concentrated hydrochloric acid to pH 1.4-1.6. Evaporated to 1/3 ne (E) of the initial volume, precipitated sodium chloride is filtered off and the filtrate is precipitated in methanol. The resulting white crystalline substance is purified three times by reprecipitation in methanol. Obtain 1.40 g of the target product (90% of theoretical yield). Elemental analysis data fully confirm the composition of the compound. Calculated: C 27.4, H 5.07 / N 7.1) R 15.7. Found: C, 27.2; 27.3; H 5.06, 5.07; N 7, o; 7.2} P 15.5; 15.6. In the NMR spectrum of the obtained compound, there is a siglet that corresponds to the presence of methylene and methine protons of the E chain of propanol, 282.1-, 2.7 (4H), m .; methylene protons associated with N and COC, S3,2 (4H), s; as well as methylene protons associated with N and PO, 8 22 (4H), d. The table shows the data of laboratory work on the assessment of the rate of interaction of ODTA and ODUMP with carbonate rocks. The data were obtained as a result of the interaction of an 8% aqueous solution of ODTA and an 8% aqueous solution of ODMF with calcium carbonate. In the experiments, the ratio of the amount of the reagent solution to the amount of calcium carbonate is 100: 1 wt.%. The rate of interaction of the reagent with calcium carbonate is determined by the volume of carbon dioxide in the gasometer, which is fixed after a certain period of time. The presence of a larger volume of gas in a gas meter over a certain period of time characterizes a higher rate of reacting the reagent with calcium carbonate. A less high rate of reacting the reagent with calcium carbonate is characterized by a smaller volume of gas in the gas meter over the same proiechut of time. ODTA with calcium carbonate 49 70 .120 - 150 210 qi ODUMP with calcium carbonate 28 41 90 124 qi t

310510954

From the data in the table, it follows that, with the ODUF action, the speed of the ODUMP interaction is lower, the ODTL interaction is 41%. than ODTA .. So, use

Comparative assessment shows its deep penetration into the reservoir, which, for 600 s, the reaction rate is 5 and increases the productivity of wells,

ODUMP allows for more

Claims (1)

₍ 2-hydroxypropylene-1,3-diamino-Ν, .Ν-diacetic- Ν, N-dimethylenephosphonic acid of the formula Hooded dHjdooK en bn _g Ro _ln ., As a water-soluble amphoteric electrolyte;