55results about How to "Efficient demulsification" patented technology

The present invention is one kind of thick oil demulsifier and its preparation process, and belongs to the field of petrochemical technology. The present invention features that phenol-amine resin as the initial material is block polymerized with epoxy propane ad epoxy ethane under the action of catalyst to obtain stereo netted macromolecular polyether as the thick oil demulsifier. The polyether as the thick oil demulsifier may be further chain expanded for even high demulsifying effect. The thick oil demulsifier can reach the oil-water interface fast to lower the elasticity and viscosity of the interface film, speed the aggregation of liquid drops and demulsify effectively. The thick oil demulsifier has simple preparation process, is suitable for industrial production, and may be used in the efficient dewatering of oil field produced liquid with different water contents.

This invention provides a method for preparing crude oil demulsification agent for crude oil pretreatment in refinery plant. Said multi-functional demulsification agent has betaine structure, being of amphoteric-ion surfactant. Organic amine is used as initiator, and epoxy propane and epoxy ethane are polymerized to produce polyether, then reacting with alpha-halogenated carboxylic acid to produce said betaine structure product. This produced has advantages of: excellent emulsification ability and dewater ability, on the molecule there are quaternary amido and carboxy group, so having excellent wetting function, and having good complexation stability to alkaline earth metals in crude-oil, being of calcium-disperser, and having excellent function for removing magnesium and iron.

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.

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 provides a short-range preprocessing method for cutting effluent. The method is characterized by comprising the following steps: adjusting a pH value of the cutting effluent to 3-4; adding soluble ferrite and hydrogen peroxide; uniformly mixing; reacting for 2-3 hours and then removing oil slick; adjusting a pH value of a bottom clean liquid to 8-9; adding a flocculating agent, stirring, fully precipitating the insoluble substances in the effluent and removing the sediment. According to the short-range preprocessing method provided by the invention, the efficient de-emulsification of the cutting effluent is realized; oil and water separation can be conveniently realized; the organic matters in high-concentration cutting effluent can be efficiently degraded; the COD removal rate is 90% or more and can reach up to 99% or more; the method is simple; the cost is low; the separated oily substances, such as machine oil and mineral oil, can be recycled; the short-range preprocessing method is suitable for large-scale industrial application.

The invention relates to a preparation method and application of a hyperbranched polymer with propylene diamine as the initiator. The preparation method includes the following steps that firstly, thepropylene diamine is dissolved in organic solvent, then, methyl acrylate is dropwise added, and an intermediate product is obtained through the Michael addition reaction lasting for 40-60 h at the room temperature; secondly, the temperature of the intermediate product obtained in the first step rises to 50-150 DEG C, the reduced pressure condensation reaction is conducted, and a rough product is obtained; and thirdly, the rough product obtained in the second step is subjected to diethyl ether separation and rotary evaporation, and the hyperbranched polymer with the propylene diamine as the initiator is obtained. The end group of the hyperbranched polymer is an amino group, a large number of amide groups and other structures are contained in the framework, a demulsifying agent can rapidly arrive at the oil-water interface due to the strong hydrophily of the amino group, the amide groups can be adsorbed to the oil-water interface in a multipoint manner, the effect of damaging an oil-water interface film is achieved, and the aim of rapid and efficient demulsifying is achieved.

The invention discloses a rotary micro-channel demulsification method. A rotary demulsification part, a supporting part and a numerical control part are included. The rotary demulsification part comprises a demulsification cylinder, a rotary motor and a rotary shaft, the top of the demulsification cylinder is connected to the rotary motor through the rotary shaft, the demulsification cylinder comprises an inner demulsification cylinder and an outer demulsification cylinder, the outer demulsification cylinder is fixedly connected to the rotary motor through a glass plate, the inner demulsification cylinder is fixedly connected to the rotary shaft, the supporting part comprises a supporting base and a supporting rod, and the side face of the supporting rod is fixedly connected to the numerical control part. The method comprises the following steps: S1, preparing an emulsion, S2, adjusting the device, S3, demulsifying by the device and S4, collecting a demulsified liquid. The outer demulsification cylinder rotates, the demulsification part deflects, polytetrafluoroethylene and organic glass materials are adopted, rapid separation is achieved, efficient demulsification is achieved, andan emulsion feeding hole, an upper discharge hole and a lower discharge hole are limited, so that sufficient and stable demulsification is realized. Different demulsification requirements are met byutilizing an embedding mode.

The invention discloses a high-viscosity strong-corrosion acid liquid system for a low-permeability sandstone oil reservoir. The system comprises the following components in percentage by mass: 6-12%of hydrochloric acid, 1-3% of betaine, 4-8% of a reinforcing agent, 0.05-0.2% of citric acid, 0.5-2% of ammonium chloride, 0.5-2% of a corrosion inhibitor, 0.1-0.4% of a cleanup additive, 0.05-0.2% ofa demulsifier and the balance of water, wherein the sum of the components is 100%. During acidification of the acid liquid system, rise of the viscosity of the acid liquid reduces the filtration lossof the acid liquid, more fresh acid is forced to enter the deep part of a stratum, the effective action distance of the acid liquid is increased, and after acidification is finished, a high-viscosityfluid is automatically broken into a low-viscosity fluid when meeting crude oil in the stratum, so that the stratum is not subjected to secondary damage.

The invention relates to the technical field of oilfield sewage disposal demulsification flocculation, in particular to a branched low-temperature high-efficiency quaternary ammonium salt modified starch demulsifying agent and a preparation method thereof. The demulsifying agent has a general molecular formula as described in the description, and the preparation method comprises the following steps: (1) adding starch, aldehyde or urea, and dialkyl amine into a reactor one after another to carry out tertiary amine end capping grafting reaction; (2) adding halogeneated epoxyalkane in a reaction product to carry out quaternization grafting reaction; (3) adding a ring-opening reagent in the reaction product to carry out ring-opening grafting reaction to obtain the demulsifying agent. According to the demulsifying agent, under the condition of not using a catalyst, the starch which is low in price, rich in raw materials and can be regenerated is taken as a raw material, the production cost is low, the industrial production is conducive to being realized, the prepared demulsifying agent is characterized in that the dosage is less and the demulsifying efficiency is high, and has a very good demulsifying effect for sewage generated by the tertiary oil recovery technology. Water is the only by-product, the utilization rate of raw materials is high, and the discharge of three wastes does not exist.

The invention discloses a preparation method of a multi-branched cationic polyether reverse demulsifier. Bisphenol A is used as a block polyether initiator, phenolic hydroxyl ortho-hydrogen, formaldehyde and vinylamine undergo an amine methylation reaction to generate a polyamine compound with bisphenol A serving as a core, vinylamine serving as a branch and a phenolic hydroxyl group as a leaf, the polyamine compound and epoxy compounds such as epoxypropane and ethylene oxide undergo a ring opening polymerization reaction to produce a multi-branched polyether, and further the tail end of the multi-branched polyether is subjected to modification with different cationization degrees to obtain the multi-branched cationic polyether reverse demulsifier. The prepared multi-branched cationic polyether reverse demulsifier is higher in deoiling rate and demulsifying efficiency and better in demulsifying capacity, and can well make up for the functional defects of a traditional demulsifier, theoil exploitation cost can be effectively reduced, energy is saved, emission is reduced, and development of an oil exploitation process is facilitated.

The invention discloses an environment-friendly multi-branched cationic polyether microbial demulsifier synthesized based on a double metal cyanide complex catalyst, bisphenol A is used as a block polyether initiator and reacts with formaldehyde and vinylamine to generate a polyamine compound which takes bisphenol A as a core, vinylamine as a branch and phenolic hydroxyl as a leaf, then ring-opening polymerization is performed on the modified cationic polyether and epoxy compounds including epoxypropane and ethylene oxide to obtain multi-branched polyether, and further the multi-branched polyether reacts with a microbial metabolite and a surfactant to obtain the multi-branched cationic polyether microbial demulsifier. The multi-branched cationic polyether microbial demulsifier prepared by using the double-metal cyanide complex catalyst has no acid-base property problem, has good chemical and biological characteristics and oil and water amphipathy, can effectively reduce the surface tension of water, can be used under the conditions of extreme temperature, pH value and salinity, is non-toxic, environment-friendly and energy-saving, the demulsifier is biodegradable, has higher deoiling rate and demulsification efficiency and better demulsification capability, does not need post-treatment, and overcomes the defects of the traditional demulsifier in function and preparation process; the oil exploitation cost is reduced, and the development of an oil exploitation process is promoted.

The invention discloses a surfactant with self-demulsification capability as well as a preparation method and application of the surfactant. The method comprises the following steps: 1) sequentially adding dodecylamine and cyclobutane-3-alkene dicarboxylic anhydride into a three-neck flask, introducing nitrogen, carrying out reaction at 150-200 DEG C for 2-5 hours, and carrying out nucleophilic addition elimination reaction to generate imide; and 2) diluting the reaction solution, slowly adding potassium permanganate at 0 DEG C, heating to carry out oxidation reaction to generate carboxyl, andreacting at 90-100 DEG C for 10-12 hours; and after the reaction is finished, adding sodium sulfite to remove excessive potassium permanganate, filtering by adopting a diatomite and extracting impurities by adopting ethyl acetate, collecting a water phase, regulating the pH value to 2-4 to separate out a product, filtering and drying to constant weight to obtain a final product. The surfactant with the self-demulsification capability is applied to thick oil emulsification, the viscosity of thick oil can be reduced, the pH value of emulsified thick oil is increased before the surfactant entersoil refining, and the surfactant can realize demulsification of the emulsified thick oil due to hydrolysis inactivation.

The invention discloses a preparation method of a water-based carbon remover for a diesel vehicle. The preparation method comprises the following specific steps: S1, respectively weighing deionized water, aromatic solvent oil, petroleum ether and a lactic acid solution in parts by weight to obtain a mixed solution A; S2, weighing polyether amine in parts by weight, and adding the polyether amine into the mixed solution A to obtain a mixed solution B; S3, weighing alcohol ether phosphate in parts by weight, and adding the alcohol ether phosphate into the mixed solution B to obtain a mixed solution C; S4, weighing triethanolamine dodecylbenzene sulfonate in parts by weight, and adding the triethanolamine dodecylbenzene sulfonate into the mixed solution C to obtain a mixed solution D; S5, weighing an alkaline solution, and adding the alkaline solution into the mixed solution D until the mixed solution is neutral to obtain a mixed solution E; and S6, weighing hydrotalcite, A-type zeolite powder and a surfactant in parts by weight, adding the hydrotalcite, the A-type zeolite powder and the surfactant into the mixed solution E, and uniformly mixing all the components to obtain the water-based carbon remover F. The method is simple in process, simple to operate, short in production period, low in industrial cost and worthy of popularization; the prepared water-based carbon remover F can be used for effectively cleaning deposited carbon of a diesel vehicle engine.

The invention discloses a clean lubricant for a gasoline and diesel direct injection engine. The clean lubricant comprises the following raw materials in parts by weight: 60-80 parts of polyether amine, 20-30 parts of soybean oleic acid, 1-2 parts of alkenyl succinate and 10-20 parts of D100 solvent oil. The polyether amine has a dissolving effect on deposited carbon, particularly has very high dissolving capacity on the deposited carbon in a low-temperature area at the front end of an engine, and the deposited carbon burns away along with oil after being dissolved; the soybean oleic acid canform a layer of adsorption film on the metal surface, the lubricating capacity of the film is very high, and after the lubricating performance is improved, abrasion of a gasoline injection system is reduced, and shaking of an engine can also be reduced. The alkenyl succinate is an antirust agent of an oil product and can inhibit rusting of an oil path system; and the D100 solvent oil is high in flash point, is not inflammable after being blended with the polyether amine, soybean oleic acid and alkenyl succinate, is clearer in product color, and is used for improving the product quality.