Acidulated retarding agent, preparation method thereof and retarding acid
A retarder, the technology of acryloyloxyethyl trimethyl ammonium chloride, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of increased acid filtration loss, small filtration loss, Affect the effect of retarding acid and other issues, and achieve the effect of improving retarding effect, increasing film-forming ability, and good compatibility
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[0056] The acidifying retarder of the present invention is a cationic hydrophobic association polymer, has good compatibility with other retarding acid additives, and has good retarding performance in the application process; at the same time, the acidifying retarder carbon fourteen cationic hydrophobic monomer It can increase the film-forming ability of the retarder and improve the retarding effect of the retarder. The present invention also provides a preparation method of the above-mentioned acidification retarder, comprising: A) in the presence of an initiator, acrylamide and / or alkylacrylamide, allyl polyoxyethylene ether, carbon fourteen The cationic hydrophobic monomer is polymerized with acryloyloxyethyltrimethylammonium chloride and / or alkylacryloyloxyethyltrimethylammonium chloride to obtain an acidification retarder; the carbon fourteen cationic hydrophobic monomer The body is prepared from dimethylaminoethyl methacrylate and tetradecane bromide.
[0057] The prese...
Embodiment 1
[0070] Add 3.91g of allyl polyoxyethylene ether APEG-700 into a 100mL flask, add 38.40g of deionized water, then add 5.00g of acrylamide (AM), after the dissolution is complete, add 7.31g of methyl Acryloyloxyethyltrimethylammonium chloride (DMC), after dissolving completely, add 0.24g of methacryloyloxyethyldimethyltetradecylammonium bromide (DC-14) to obtain monomer mass 30% solution, then add 0.049 g of initiator azobisisobutyramide hydrochloride, after the dissolution is complete, react at a temperature of 50°C for 4 hours to obtain a gel-like product, which is washed and purified with absolute ethanol Three times, the product was baked in an oven at 50°C for 24 hours to obtain the acidification retarder.
[0071] Utilize the WQF-520 type Fourier transform infrared spectrometer of Beijing Ruili Analytical Instrument Company, adopt the KBr tabletting method to measure the infrared absorption spectrum of the acidifying retarder obtained in embodiment 1, obtain its infrared a...
Embodiment 2
[0073]Add 3.26g of allyl polyoxyethylene ether (APEG-700) into a 150mL flask, add 68.62g of deionized water, then add 5.00g of acrylamide (AM), after the dissolution is complete, add 3.65g of Methacryloyloxyethyltrimethylammonium chloride (DMC), after dissolving completely, add 0.20g of methacryloyloxyethyldimethyltetradecylammonium bromide (DC-14) to obtain mono 15% solution by weight percent, then add 0.036 g of initiator azobisisobutylamidine hydrochloride, after the dissolution is complete, react at a temperature of 45°C for 4 hours to obtain a gel-like product, and use absolute ethanol Wash and purify for 3 times, and dry the product in an oven at 50°C for 24 hours to obtain the acidification retarder.
[0074] Gel permeation chromatography was used to characterize the molecular weight of the acidification retarder obtained in Example 2, and the purified acidification retarder was dissolved in 2mol / L sodium nitrate solution to prepare a 2000mg / L solution. The molecular w...
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Abstract
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