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384 results about "Polyoxyethylene alkyl ether" patented technology

Polyoxyethylene alkyl ethers, CnEm, are nonionic surfactants made of an alkyl chain with n methylene groups and a hydrophilic part with m oxyethylene units. CnEm nonionic surfactants are very useful in chemical analysis. The commercially available products are often a mixture of several CnEm molecules with different m values.

Foam drainage gas recovery method for natural gas horizontal well

InactiveCN102587865AThe effect of drainage and gas recovery is obviousSimple and safe operationFluid removalDrilling compositionRecovery methodPolyethylene glycol
The invention relates to a foam drainage gas recovery method used for a natural gas horizontal well. The method is capable of injecting a foam scrubbing agent into the bottommost end of a gas well shaft, so that the whole shaft is filled with foam fluid and optimal drainage gas recovery effect is achieved. The technical scheme of the method comprises the following steps: firstly, manufacturing a dynamical underground foam scrubbing bar which consists of a gas nozzle, a tail wing, a boosting agent, a shell and a protection head sleeve, wherein the material for manufacturing the tail wing, the shell and the protection head sleeve is the solid foam scrubbing agent which consists of polyoxyethylene alkyl ethers, polyethylene glycol, urea, imidazoline, sodium dodecyl benzene sulfonate and saturated alcohol sulfate; and the boosting agent is one of dry ice, sodium hydride or potassium oxide; and secondly, throwing the dynamical underground foam scrubbing bar to the bottom of the well, wherein the boosting agent is in contact with water to generate a large amount of gas, so that the foam scrubbing bar is pushed to the bottommost end; and as the foam scrubbing agent is dissolved, a large amount of foam is formed to achieve the optimal effect of drainage gas recovery. The method disclosed by the invention has a wide application range without any wellhead equipment and energy, is simpleand safe in operation, low in cost and has no pollution to the environment.
Owner:SOUTHWEST PETROLEUM UNIV

Cleaning agent for treating oily sludge by using hot washing method and preparation method of cleaning agent

The invention relates to a cleaning agent for treating oily sludge by using a hot washing method and a preparation method of the cleaning agent. The cleaning agent comprises the following components in percentage by weight: 10-20 percent of polypropylene oxide and polyoxyethylene phenolic resin ether, 20-30 percent of sodium dodecyl benzene sulfonate, 1-5 percent of polyoxyethylene alkyl ether sulfate (AES), 5-10 percent of sodium hydroxide, 5-10 percent of methanol and the balance of water. The preparation method of the cleaning agent comprises the following steps of: adding the polypropylene oxide and polyoxyethylene phenolic resin ether and the sodium dodecyl benzene sulfonate into an enamel reactor; adding water under continuously stirring; gradually adding the AES after 30 minutes; continuously stirring for 60 minutes and then opening cooling water; continuously stirring and sequentially adding the sodium hydroxide and the methanol; and simultaneously stirring and cooling for 40 minutes. According to the cleaning agent, the double functions of demulsifying and cleaning are achieved, the separation effect of oil, water and sludge can be improved and oil in the hot washing water and oil in the finally-treated sludge are reduced.
Owner:PETROCHINA CO LTD +2
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