What is Foam stabilizer
The preparation of water base foam stabilizing agent of the present invention is by molecules surfactant A under agitation, is added to the water, and the concentration of polymer solution is 0.1-1wt%, in the situation that of constant temperature 25-60 ℃, continues to stir 24-48 hour, until solution is clear. Described water is deionized water, mineralized water, or both combinations. One of the described waters is preferred deionized water, and the preferred two is the combination of deionized water and mineralized water 1:1 volume ratio. For with one of nitrogen, carbon dioxide, oxygen, air, flue gas, decarburization flue gas or be combined as the water base foam system of the gas phase, join in the liquid phase of water base foam system and make stabilizing agent. A water base foam system with ultra stability, the aqueous solution that the molecules surfactant A mass concentration of the present invention of take in liquid phase component is 0.1-1wt% is made foam stabilizer; Gas phase is one of nitrogen, carbon dioxide, oxygen, air, flue gas, decarburization flue gas or combination. The present invention adopts molecules surfactant A, and its main chain is a polyethylene long-chain. And side chain contains a hydrophilic base, and the side group of 5-20% contains the hydrophobic alkane chain with a carbon number is 8-24, a molecular weight is 10,000-200, and 000 belongs to a water-soluble polymer. The present invention utilizes this water-soluble macromolecule surfactant A as the stabilizing agent of water base foam. Molecules surfactant A is amphiphilic; it can be adsorbed on gas-liquid interface stable foam, and can also pass through hydrogen bonds between this large molecule and the interactions such as hydrophobic force are mutually wound around. They are cross-linked to form a network structure at a gas-liquid interface, high to gas-liquid interface coverage; it is strong that the bubble film forming is held liquid ability, the liquid holdup is large, the liquid film is thicker, gas permeation rate is low, foam stability is high, even if adopt carbon dioxide as keeping excellent foam stability under the extremely harsh conditions such as foamed gas or crude oil existence.
A kind of water base foam system with ultrastability
Through experimental verification, the foam stabilizer of the present invention can be applied in water base foam system, no matter gas phase adopts the mist of nitrogen, carbon dioxide, oxygen, air, flue gas, decarburization flue gas, or these several gases, all can form overstable water base foam. Exist under former oil conditions, when crude oil contacts with foam, molecules surfactant A is not easy by gas-liquid interface then is adsorbed on oil-water interfaces, and crude oil is not easy to sprawl at gas-liquid interface, thereby can not cause liquid-sheet disintegration. Hence, the grease resistance of foam is high. The overtemperature water base foam system of the present invention can be applicable to fields such as oilfield chemistry, detergents and cosmetics, and mineral floating. In deionized water, add in proportion hydrophobically modified polyacrylamide, be uniformly mixed, be mixed with the solution that concentration is 0.1wt%, 30 ℃ of stirrings, stabilize half an hour solution temperature is constant. Obtain foam stabilization agent solution. In the 0.1wt% hydrophobically modified polyacrylamide foam stabilization agent solution of configuration as mentioned above, pass into nitrogen, with the air-flow method, form foam, control nitrogen flow rate degree at 75ml/min, generate 100ml foam, after stopping bubbling, at interval of the regular hour, read foam volume, until foam attenuation arrives half volume. The half-foam life period in comparative example 1, traditional sodium dodecyl sulfate solution forms is 10 hours, and the half-life of the foam that the foam stabilization agent solution of the present embodiment forms reaches more than 90 hours, to compare with comparative example 1, foam stabilization effect is remarkable.
Foam stabilization effect expedition
In the 0.2wt% hydrophobically modified kayexalate foam stabilization agent solution of configuration as mentioned above, pass into carbon dioxide, with the air-flow method, form foam, control carbon dioxide Flow Velocity at 75ml/min, generate 100ml foam, after stopping bubbling, at interval of the regular hour, read foam volume, until foam attenuation arrives half volume. Preparation 0.3wt% lauryl sodium sulfate aqueous solution passes into carbon dioxide by the above-mentioned same method and measures the foam attenuation curve; the results are shown in Figure 2. As can be seen from Figure 2, the half-life of the foam that comparative example table surface-active agent forms is only 30 minutes, and the half-foam life period that the present embodiment of two foam stabilizers form can reach 4 hours. In deionized water, dissolve the vinyl alcohol of 8g and the EDTA of 0.5g, then add the dodecyl sodium sulfate of 2g and the acrylate of 0.15g (alkane chain carbon number is 8). The reactor is placed into a water bath with thermostatic control, logical N 2gas added initiator after 30 minutes, and temperature is 50 ℃ for stirring reactions for 20 hours. Obtain hydrophobically modified polyvinyl alcohol; the molecular weight of the product is approximately 80,000. In the situation that stirring, with the mass ratio of 1:10, in the 0.3wt% hydrophobically modified polyethylene glycol foam stabilization agent solution of configuration as mentioned above, add crude oil. Crude oil is that Shengli Oil Field wins the crude oil that sticks together, stir half an hour. The mixed solution is poured into a glass core sparger, 60 ℃ of constant temperature, control nitrogen flow rate and under 100ml/min, generate 100ml foam, after stopping bubbling, start immediately to record the time-dependent curve of foam volume.
Price of Foam stabilizer
Foam stabilizer particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Foam stabilizer. A large amount of large amount will be lower. The Price of Foam stabilizer is on our company's official website.
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