351results about How to "Good demulsification effect" patented technology

The invention relates to a novel crude oil demulsifier and a preparation method thereof. The novel crude oil demulsifier is prepared from esterified butyl acrylate acrylic acid copolymer and polyether demulsifier. Calculated according to a total weight of the butyl acrylate acrylic acid copolymer and the polyether demulsifier as 100%, the novel crude oil demulsifier comprises components of, by weight: 10-95% of the butyl acrylate acrylic acid copolymer, 5-90% of the polyether demulsifier, 0.1-3% of an acidic catalyst, 0.1-0.2% of a polymerization inhibitor of hydroquinone, and a solvent which is a good solvent for the butyl acrylate acrylic acid copolymer and the polyether demulsifier. According to the novel crude oil demulsifier and the preparation method thereof, the butyl acrylate acrylic acid copolymer and the polyether demulsifier with demulsification functions are subject to an esterification reaction. The prepared demulsifier provides a good demulsification effect upon crude oil emulsion.

This invention discloses a method for synthesizing a high-efficiency crude oil demulsifier from cornstarch and conventional polyether demulsifier by graft copolymerization. The method comprises: (1) adding solvent and cornstarch into a reaction kettle with a stirrer, slowly adding proton acid (20-80 wt.% of cornstarch), and stirring for 1-4 h; (2) adding polyether demulsifier and solvent, and refluxing under heating for 2-8 h; (3) adding NaOH solution for neutralization, ending NaOH addition when the pH value is 6.5-8.0, and reacting for 1-3 h until the solution is transparent. The demulsifier has such advantages as simple process, mild operation conditions, wide applications, and good demulsification effect.

The invention discloses a method for treating the waste emulsion with high concentration and a plurality of varieties by an ultrafiltration membrane method and a device thereof, which belongs to the technical field of waste water and waste liquid treatment. The main technique of the invention is 'dissolved air flotation-ultrafiltration membrane-electrolysis floatation', which can effectively reduce the dosage of medicament and improve emulsion breaking effect by adopting an efficient dissolved air flotation system, moreover, the water for dissolved air flotation, which is taken from a subsequent intermediate water tank, can flexibly adjust and dilute the concentration of the waste water, thus improving the running stability and the shock resistant loading capability of the system. An ultrafiltration membrane with large flux, high separative efficiency and long service life is adopted in an ultrafiltration system to realize oil-water separation and to concentrate the emulsion for a plurality of times and then floating oil is recovered, the waste water generated in ultrafiltration washing is treated again after reflow, thus reducing waste liquid discharging. Electrolysis floatation can remove residual emulsified oil and dissolved oil in the waste water, thus further lowering the COD value of yielding water. When the quality of raw water is changed, an activated carbon adsorption unit can guarantee the quality of the yielding water to be standard. The method and the device of the invention can process waste emulsion with high concentration and a plurality of varieties and have simple and reasonable technique, good quality of yielding water, compact layout of the device, thus facilitating automatic control and realizing recovery of emulsion and recycle economy as well as changing waste to be profitable simultaneously.

The invention discloses a method for producing pentaerythritol oleate under catalysis of granular solid superacid, and relates to a method for synthesizing ester base oil in biodegradable lubricating oil. The method comprises the following steps of: mixing pentaerythritol and oleic acid in a mass ratio of 1:(7.2-9.5), adding the granular solid superacid, and reacting at the temperature of between 140 and 240DEG C for 4 to 10 hours in the vacuum degree of 100-1,000Pa; filtering by using a 200-12,500 mesh filter screen or filter plate; and heating crude grease to the temperature of between 160 and 280DEG C, removing unreacted acid or alcohol, keeping the vacuum degree of the system ranging from 1 to 500Pa, and distilling under reduced pressure for 40 to 120 minutes to obtain the pentaerythritol oleate. The pentaerythritol oleate produced by the method has excellent low temperature fluidity, lubricity, viscosity-temperature characteristics, oxidation safety, cleanness and good biodegradability, and the method is an environment-friendly and high-efficiency production method having advantages of simple treatment, short production period, high esterification rate and high product yield.

The present invention discloses an oil-in-water type emulsion demulsifying agent and a preparation method thereof. Firstly, bisamide is prepared, then chlorinated polyether is prepared, and finally cationic polyether is obtained, namely the oil-in-water emulsion demulsifying agent. The preparation method has readily available raw materials, is simple in operation, and has low equipment requirements. The prepared demulsifying agent is a cationic polymer with a network structure formed by the reaction of bisamide and epichlorohydrin, has a special network structure and a very strong surface activity, has a good demulsification function, is a reverse demulsifying agent suitable for chemical flooding produced liquid, can be used in oilfield produced wastewater treatment, can break the emulsion interfacial energy, and has an oil removal rate of more than 98% in a use amount of 20-30 mg / L. The prepared demulsifying agent is not layered, has no caking and no mechanical impurities, and has characteristics of being fast in oil and water separating speed and being low in oil content of water, and a good demulsifying effect for a three compound combination flooding O / W emulsion and high oil removal efficiency.

The invention discloses a polyether crude oil demulsifier using straight chain alkyl phenolic resin as an initiator and a preparation method and an application thereof. The general formula of the polyether crude oil demulsifier using straight chain alkyl phenolic resin as an initiator is A-(PO)a-(PO)b-(EO)c-(PO) m, wherein PO is -(CH2-O-CH2CH2)-, EO is -(O-CH2CH2)-, A and R are straight chain alkyls with carbon number of 6, n is an integer of 5-13, a+b is equal to m, and in the general formula, the mass of EO accounts for 15-25% of the mass sum of EO and PO. The polyether crude oil demulsifier prepared by the invention is simple in preparation process, good in surface activity, strong in demulsification capability and diffusion capability, good in dehydration effect, excellent in capability of perfecting oil-water interface emulsification performance and strong in universality, and the demulsification and dehydration rate of the crude oil reaches to 80-92%.

A broad-spectrum deemulsifier for crude oil contains the polymer of polyol, ethylene oxide and propylene oxide (20-50 wt.%), the polymen of polyamine, ethylene oxide and propylene oxide (20-50), pour depressor (10-20) and solvent (15-25). Its advantages are broad spectrum for more than 10 kinds of crude oils, and low dosage (5-10 ppm).

The invention discloses a treatment method of oil-containing sludge and belongs to the field of environmental engineering. The treatment method comprises the following steps of: introducing the oil-containing sludge into a separating groove, discharging into a deemulsifying groove for deemulsification after initially separating, and carrying out oil-water-sludge separation on deemulsified productsin an oil-sludge separating device; recovering dirt oil at the upper part, settling sludge-water mixture at the lower part, recovering clear liquor, and carrying out coagulation treatment, settling separation, mechanical dewatering, sludge drying and sludge incineration treatment in sequence on the sludge-water mixture at the bottom part and residual active sludge. Composite deemulsifying agentspreferred by the invention include a polyethylene polyamine blocked polyether deemulsifying agent, a silicon-containing deemulsifying agent, a phenolic-resin deemulsifying agent, an alkylphenol polyoxyethylene ether deemulsifying agent, a polyphosphoester deemulsifying agent or a polyaluminium-chloride deemulsifying agent. The deemulsifying method disclosed by the invention has the beneficial effects that the safe and environment-friendly effects are achieved, the water content of oil sludge can be reduced, most crude oil in the oil sludge can be recovered, and the difficulty of the followingtreatment of the sludge can be reduced.

The invention discloses an industrial sewage treatment agent, which comprises the following raw materials by weight: 20-40 parts of chrysotile, 10-30 parts of diatomite, 10-30 parts of modified activated carbon, 10-20 parts of polymeric aluminum phosphate, 5-15 parts of polymeric phosphate-ferric chloried, 1-5 parts of aluminum potassium sulfate, 5-10 parts of bentonite, 1.5-2.5 parts of polyacrylamide, 1.4-2.5 parts of sodium hexametaphosphate, 1-3 parts of modified attapulgite, 10-30 parts of isopropanol, 5-15 parts of sodium nitrite, 2-10 parts of thiourea, and 2-4 parts of acrolein. The industrial sewage treatment agent provided by the invention can be used for industrial sewage treatment, and has the advantages of fast flocculation and purification speed, thorough sewage treatment, excellent stability and high safety.

The invention relates to a method for improving a demulsification performance of a cell wall combined biological de-emulsifier. The method comprises the following steps: performing freeze drying on the cell wall combined biological de-emulsifier, so as to obtain dried biological de-emulsifier powder; mixing and stirring the dried biological de-emulsifier powder and a mixed solution of methanol and hydrochloric acid according to a certain ratio, carrying out methyl esterification reaction, and finally performing rotary evaporation and drying to obtain the cell wall combined biological de-emulsifier of which the demulsification performance is improved. Compared with the prior art, the method disclosed by the invention is simple and relatively low in cost, the demulsification performance of the cell wall combined biological de-emulsifier is obviously improved, and the large-scale application is easily realized.