2results about How to "Good foam stabilization effect" patented technology

The invention belongs to the technical field of oil exploitation, and particularly relates to a foaming agent for nitrogen foam fracturing and a preparation method and application thereof. The preparation method comprises the following steps: (1) sequentially adding trimethylolpropane tri (3-aziridinyl propionate), an organic solvent and 1-amino-3, 6, 9, 12, 15, 18-hexaoxaheneicosan-21-acid into a reactor, adjusting the pH value to 2-3 by using hydrochloric acid, and carrying out heat preservation reaction; (2) adding alkyl halide into the reactor, adjusting the pH value to 8-9 by using sodium hydroxide, carrying out heat preservation reaction, irregularly detecting the pH value in the reaction process, and maintaining the pH value to 8-9 by using sodium hydroxide; and (3) carrying out reduced pressure distillation on the mixed solution in the step (2) to obtain a viscous solid, and drying to obtain the foaming agent for nitrogen foam fracturing. The foaming agent for nitrogen foam fracturing has the advantages of good foaming and foam stabilizing effects and large liquid carrying capacity.

The application relates to the technical field of fire extinguishing agents, and particularly discloses a foam fire extinguishing agent compounded by anionic Gemini surfactants and a preparation method thereof, which comprises the following components in percentage by mass: 5-15% of anionic Gemini surfactants; 0.5-3% of fluorocarbon surfactants; 3-9% of hydrophilic monomer oligomers; 2-5% of zwitterionic surfactants; 1.0-2.5% of nonionic surfactants; 3-12% of anti-burning agents; 2-7% of cosolvents; and the balance of water. The biodegradable short-chain fluorocarbon surfactants are precisely compounded with anionic Gemini surfactants of specific structures, hydrophilic monomer oligomers and the like, and a preparation process of step-by-step construction is adopted, so that the environmental friendliness is remarkably improved, the performance of the fire extinguishing agent is comprehensively broken through, the water film on the oil surface is ensured to be rapidly spread and rapidly extinguished, the foam covering layer is endowed with super-strong mechanical stability and thermal stability, the anti-reignition time is greatly prolonged, and the purposes of efficient fire extinguishing, long-lasting anti-burning and environmental friendliness are finally achieved.