Epoxysuccinic acid modified mannoside, preparation method and application thereof, fracturing fluid cross-linking agent and fracturing fluid

A technology of epoxy succinic acid and mannoside, which is applied in the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., can solve the problems of weak coordination and short delayed crosslinking time

Pending Publication Date: 2022-04-01
昆山京昆油田化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned ligands mainly rely on the hydroxyl group on the sugar ring to achieve coordination with the central particle, and the coordination is weak, resulting in a short delayed cross-linking time of the fracturing fluid cross-linking agent using the above-mentioned ligands

Method used

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  • Epoxysuccinic acid modified mannoside, preparation method and application thereof, fracturing fluid cross-linking agent and fracturing fluid
  • Epoxysuccinic acid modified mannoside, preparation method and application thereof, fracturing fluid cross-linking agent and fracturing fluid
  • Epoxysuccinic acid modified mannoside, preparation method and application thereof, fracturing fluid cross-linking agent and fracturing fluid

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preparation example Construction

[0041] The present invention provides the preparation method of the epoxysuccinic acid-modified mannosyl glycoside described in the technical scheme, comprising the following steps:

[0042] Under a protective atmosphere, α-methyl-D-mannoside, lower alcohol, inorganic strong base, epoxysuccinic acid and water are mixed to perform a ring-opening reaction to obtain the epoxysuccinic acid-modified mannosyl glycoside.

[0043] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0044] In the present invention, the protective atmosphere is not particularly limited, and a protective atmosphere well known to those skilled in the art can be used, such as nitrogen, argon or helium.

[0045] In the present invention, the mass ratio of α-methyl-D-mannoside to epoxysuccinic acid is preferably 1:0.7-1.4, more preferably 1:0.8-1.3, and even more preferably 1: 0.9-1.2, most preferably...

Embodiment 1

[0077]Mix 3g of epoxysuccinic acid, 12mL of water and 30mL of isopropanol evenly to obtain a solution of epoxysuccinic acid; add 9g of water, 3g of α-methyl-D-mannoside, 30g of isopropanol and 12g of % sodium hydroxide aqueous solution, add nitrogen gas and stir and mix for 20min, add epoxysuccinic acid solution dropwise, heat up to 45°C, open ring and react for 6.5h under nitrogen atmosphere, filter with suction, and wash the obtained solid product with isopropanol 5 times, and then dried to constant weight at 55° C. to obtain epoxysuccinic acid modified mannosyl glycoside (α-methyl-D-mannoside, 1.54 g, yield 30 %, the purity is 90%).

[0078]

[0079] figure 1 The hydrogen spectrogram of the epoxysuccinic acid modified mannosyl glycosides prepared for the present embodiment is obtained by figure 1 It can be seen that 5.22 and 5.11ppm are the hydrogens on the C8 and C9 of epoxysuccinic acid modified mannosyl glycosides, and 4.80ppm is the hydrogen on the sugar ring C1 po...

Embodiment 2

[0085] In terms of mass fraction, the raw materials for the preparation of the fracturing fluid cross-linking agent: 8% zirconium oxychloride, 8% triethanolamine, 5% lactic acid, 5% epoxysuccinic acid modified mannosyl glycoside prepared in Example 1, propylene glycol Triol 6%, water 48%.

[0086] A sodium hydroxide solution with a concentration of 3wt% is used as the pH regulator, wherein the quality of the pH regulator is not included in the quality of the fracturing fluid.

[0087] Add zirconium oxychloride and water into the three-neck flask and stir evenly, heat to 50°C, add triethanolamine dropwise and stir for 20 minutes, then add lactic acid dropwise and stir for 20 minutes, then add epoxysuccinic acid modified mannosylside and stir for 20 minutes, then add Stir the glycerin evenly, heat-preserve and coordinate for 3 hours at 50°C, stop heating, and adjust the pH value to 8 with sodium hydroxide solution after cooling to room temperature to obtain a fracturing fluid cr...

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Abstract

The invention provides epoxy succinic acid modified mannoside, a preparation method and application thereof, a fracturing fluid cross-linking agent and a fracturing fluid, and relates to the technical field of cross-linking agents. When the epoxy succinic acid modified mannoside with the structure as shown in the formula I provided by the invention can be used as a ligand to be applied to a fracturing fluid cross-linking agent, adjacent carboxyl and hydroxyl of the epoxy succinic acid modified mannoside can form a five-membered ring with a stable structure with central particles (zirconium ions, titanium ions, aluminum ions or boron atoms); compared with gluconate and modified gluconic acid, the alpha-methyl-D-mannoside has a better chelation effect and longer delayed cross-linking time, and has a very good application prospect in the aspects of preparation of chelates, cross-linking agents, detoxification drugs, foods or functional materials by using the alpha-methyl-D-mannoside as a ligand or a cross-linking agent.

Description

technical field [0001] The invention relates to the technical field of crosslinking agents, in particular to an epoxysuccinic acid modified mannosyl glycoside, a preparation method and application thereof, a fracturing fluid crosslinking agent, and a fracturing fluid. Background technique [0002] Fracturing fluid is the liquid used in the mining process of fluid mines (such as gas, gas, oil, fresh water, brine, hot water) in order to obtain high yield and borrow liquid conduction force (such as hydraulic) fracturing measures. Delayed cross-linking technology is an important technology in the hydraulic fracturing of oil and gas wells. This technology makes the online mixed fracturing fluid not cross-linked when it flows in the wellbore, and only a certain amount of thickener can make the fracturing The fluid has a certain viscosity to carry the proppant, so the shear degradation of the polymer in the fracturing fluid is not serious; after the fracturing fluid enters the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/04C07H1/00C09K8/68C09K8/86
Inventor 谢文龙邓明宇胡传智平纯杰彭树华张媛媛林学伟
Owner 昆山京昆油田化学科技有限公司
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