55results about How to "Efficient demulsification" patented technology

Recovery of hydrocarbons, such as petroleum products, from a liquid or solid substrate is facilitated by the use of microwave energy to energize and separate molecular bonds between the hydrocarbons and the substrate. A radio frequency (RF) applicator delivers microwave energy to a treatment volume containing an emulsion of a hydrocarbon and a substrate. Delivering the microwave energy to the emulsion facilitates separation of the hydrocarbon and substrate molecules into layers. Hydrocarbons and other products can then be recovered from their respective layers. The treatment volume may be located either above or below ground. The RF applicator may include an antenna body with slots formed substantially parallel to one another in a substantially horizontal orientation. The RF applicator efficiently delivers microwave energy into the treatment volume. Substantially all of the power supplied to the RF applicator is radiated, with very little power reflected internally within the RF applicator.

Recovery of hydrocarbons, such as petroleum products, from a liquid or solid substrate is facilitated by the use of microwave energy to energize and separate molecular bonds between the hydrocarbons and the substrate. A radio frequency (RF) applicator delivers microwave energy to a treatment volume containing an emulsion of a hydrocarbon and a substrate. Delivering the microwave energy to the emulsion facilitates separation of the hydrocarbon and substrate molecules into layers. Hydrocarbons and other products can then be recovered from their respective layers. The treatment volume may be located either above or below ground. The RF applicator may include an antenna body with slots formed substantially parallel to one another in a substantially horizontal orientation. The RF applicator efficiently delivers microwave energy into the treatment volume. Substantially all of the power supplied to the RF applicator is radiated, with very little power reflected internally within the RF applicator.

The invention discloses a method for performing electrostatic desalting and dehydration on crude oil, which comprises the following steps: heating the crude oil to a temperature of between 115 and 155 DEG C; pouring water of which the weight is between 3 and 8 percent of the total weight of the crude oil to the crude oil; adding a demulsifier of which the weight between 0 and 25 micrograms per gram of the total weight of the crude oil to the mixture; mixing the materials in an active region with the ultrasonic frequency of between 20 and 40 kHz and the intensity of sound of between 0.5 w / cm<-2> and 0.75 w / cm<-2> for 1 to 5 minutes; keeping the mixture in a desalting and dehydrating tank in an electric field with the pulse electrical field strength of between 600 V / cm and 2,000 V / cm, the duty ratio of between 15 and 50 percent and the frequency of between 100 and 800 Hz for 25 to 50 minutes; and separating out sewage to obtain the purified crude oil which meets the requirement on salt content and is taken out of the device. The method can save more than 50 percent of electric energy.

The invention relates to a preparation method of an efficient deemulsifier for naphthenic extra heavy oil and a product thereof, belonging to the technical field of petroleum processing. The efficient deemulsifier is prepared by polymerizing alkylphenol, polyethylene polyamine and formaldehyde to obtain thermoplastic phenol-amine resin as an initiator, polymerizing the initiator with oxirane and epoxypropane to generate polyether blocked copolymer, and then esterifying the polyether blocked copolymer with acrylic acid and other unsaturated acids to generate a modified polyether product by grafting olefine acid. The product prepared by the method has the characteristics of quick dehydration and low dosage. The efficient deemulsifier of the invention is suitable for dehydrating the naphthenic extra heavy oil of Karamay oil fields, meeting the requirements of proper temperature, quick dehydration, high dehydration rate, clear water color, and tidy oil-water interface, and has high efficiency demulsification and dehydration performance.

The invention discloses a microwave-assisted supercritical CO2 extraction system and a microwave-assisted supercritical CO2 extraction method for crude oil in oil sand. The system comprises at least two extraction kettles, a microwave generator, a separator, a gas purifier, a buffer tank, an entrainer storage tank and the like. The method comprises the following steps: conveying oil sand to each extraction kettle by virtue of a conveying device, meanwhile, feeding CO2 and the entrainer into the buffer tank, enabling the mixture in the buffer tank to enter the extraction kettle, and closing valves at the inlet and outlet ends of the extraction kettle; starting the microwave generator, staying for a period of time after the temperature in the kettle is up to the extraction temperature, opening the valve at the bottom of the kettle, discharging sand, opening the valve at the top outlet of the kettle, and enabling gas-phase fluid to enter the separator through a throttle valve; discharging crude oil from an outlet at the bottom of the separator, and returning the top gas to the buffer tank by virtue of the purifier. The system is provided with the at least two extraction kettles which can be alternately operated to realize continuous operation.

The invention discloses an acid-containing crude oil demulsifying agent and a preparation method thereof. The effects of eliminating oil water emulsification, reaching deep desalination and dehydration and reducing oil in drained water are achieved. The demulsifying agent consists of 30 to 60 weight percent of polyvinyl polyamine polyoxyethylene polyoxypropylene ether, 1 to 10 weight percent of emulsifying inhibitor, 1 to 10 weight percent of flocculating agent, 1 to 15 weight percent of dispersion cosolvent and 20 to 50 weight percent of solvent. The demulsifying agent can be used for electric desalination and dehydration processes of acid-containing crude oil and acidified crude oil, the adding amount is 10 to 100mug / g, the salt content of the acid-containing crude oil after electric desalination can be reduced to be less than 3mgNaCl / L, and the water content can be reduced to be less than 0.3 weight percent.

The invention discloses a hyperbranched polymer. The hyperbranched polymer is centered on trimethyl citrate and the amine group is an end group; the weight average molecular weight M of the hyperbranched polymer is w is 10757 and the PDI is 5.09. The hyperbranched polymer is centered on trimethyl citrate, and the amine group is the end group. It contains a large number of hydrophilic groups, which can significantly reduce the oil-water interfacial tension and improve the demulsification efficiency. Efficient demulsification of oil-in-water emulsions can be achieved under a low temperature. At room temperature, the demulsification efficiency of 50mg / L hyperbranched polymers for diesel oil emulsions can reach 99.7%. Milk efficiency is high. The invention also provides a preparation method of the hyperbranched polymer and its application as a demulsifier.

The invention discloses a heavy oil oil-water demulsification separation equipment and method, comprising an oil-water separation tank, and is characterized in that it also includes an electromagnetic induction heater and a vapor-liquid cyclone separator. The oil-water separation tank is divided into a first-stage oil-water separation chamber and a second-stage oil-water separation chamber. The first-stage oil-water separation chamber is connected to the second-stage oil-water separation chamber through an electromagnetic induction heater and a vapor-liquid cyclone in turn. The separation method includes the following steps to mix the oil-water and send the liquid to the first-stage oil-water separation tank. The oil-water separation chamber is used for oil-water separation, and the oil phase separated in the first-stage oil-water separation chamber is sent to the electromagnetic induction heater for treatment. The liquid mixture obtained after flow separation enters the secondary oil-water separation chamber for oil-water separation again to obtain refined oil with a water content of less than 0.5%. The advantages are high oil-water separation efficiency, low energy consumption and high product purity.