11results about How to "Improve demulsification efficiency" patented technology

The present application relates to a kind of demulsifier for oily wastewater and its preparation method, belong to oily wastewater treatment technical field.The raw material component of the demulsifier includes 15-25wt% iron salt, 10-20wt% aluminum salt, 5-10wt% auxiliary salt and the balance deionized water;Auxiliary salt is the complex system of magnesium salt and zirconium salt;The demulsifier is complexed into intermediate by its raw material component, then polymerized at the temperature of ≤30 ℃.The synergistic effect of iron ion, aluminum ion, magnesium ion and zirconium ion, the prepared demulsifier keeps the oil removal rate at 95% or more in the range of temperature 5-40 ℃, salinity 0.5%-5%, pH 4.0-10.0, COD removal rate is more than 85%, and the performance stability is significantly better than traditional demulsifier, with high demulsification efficiency, low sludge yield, strong adaptability, green environmental protection, low cost and wide application scenarios, with high market value.

The utility model relates to crude oil separation technical field, concretely relates to a crude oil high frequency demulsification separation device, include: feed system, feed system includes mixing tank, one side of feed system is provided with high frequency demulsification unit, high frequency demulsification unit includes demulsification tank, the top fixedly connected with high frequency power supply of demulsification tank, the inside of demulsification tank is provided with electrode plate, the other side of high frequency demulsification unit is provided with gravity separation unit, gravity separation unit includes gravity sedimentation tank, the inside even fixedly connected with a plurality of inclined plate of gravity sedimentation tank, the other side of gravity separation unit is provided with cyclone separation unit, and cyclone separation unit includes cyclone separator, through the setting of high frequency demulsification unit, gravity separation unit and cyclone separation unit, can quickly destroy crude oil emulsification structure, improve demulsification efficiency, combine gravity sedimentation and cyclone separation technology, realize the depth separation of crude oil, water and impurity, and further greatly improved the separation effect.

The invention discloses a treatment method of retainer cleaning water and mold processing cutting fluid, and belongs to the technical field of industrial sewage treatment. The mixed sewage of holder cleaning water and mold processing cutting fluid is subjected to first filter pressing and then conveyed into a sewage pool to adjust the pH value, the sewage oil removal agent accounting for 70% of the total weight of the sewage oil removal agent and the sewage are synchronously conveyed into a stirring cylinder to be stirred, then second filter pressing is conducted, and the sewage oil removal agent is obtained. Adding the rest 30% by weight of the sewage oil removal agent into a second stirring cylinder for treatment, then carrying out third filter pressing, conveying the sewage oil removal agent into a sedimentation tank, adding a bactericide, and standing in the sedimentation tank to obtain treated water. According to the process, the sewage and the sewage oil-removing liquid medicine are simultaneously input into the stirring cylinder, so that the contact area of the liquid medicine and the sewage can be increased, the sewage oil-removing liquid medicine can play a role in the conveying process, and the sewage treatment efficiency is improved.

The present application relates to the technical field of oilfield chemistry, in particular to a salt-tolerant demulsifier system, application and a high-salt shale oil produced liquid treatment method.The salt-tolerant demulsifier system comprises a salt-tolerant block polyether main agent, a zwitterionic surfactant and an organic acid complexing agent; the salt-tolerant block polyether main agent is a star-shaped block copolymer with polyethylene oxide as a hydrophilic head, polypropylene oxide as a hydrophobic chain and polyglycerol or pentaerythritol as a starter; and the zwitterionic surfactant is a sulfobetaine surfactant.The salt-tolerant demulsifier system has excellent salt tolerance, high demulsification efficiency, fast speed and clean water quality; and the high-salt shale oil produced liquid treatment method has wide applicability and good effects on not only high-salt shale oil but also conventional high-salt crude oil produced liquid.

This invention discloses a low-temperature polyether demulsifier for oil and gas gathering and transportation and its preparation method, relating to the field of petrochemical technology. The key technical points include: using cashew nut shell powder, pentaethylene hexamine, and bisphenol F in a specific molar ratio as an initiator, and preparing a composite initiator via formaldehyde condensation; incorporating propylene oxide and ethylene oxide through staged block copolymerization to form a polyether backbone; introducing fluorinated epoxy monomers for end-fluorination modification; and finally, performing chain extension and crosslinking with adipic acid and epichlorohydrin to obtain a demulsifier with a molecular weight of 8000~12000 Da, a fluorine content of 5.5~6.5 wt%, and a PDI ≤ 1.3. The effect is that through the synergistic effect of the composite initiator, the superhydrophobic penetration of the fluorinated block, and precise molecular weight control, efficient demulsification at low temperatures is achieved, improving demulsification efficiency and reducing dosage, solving the problems of low-temperature failure and easy emulsification of traditional demulsifiers, and adapting to the low-temperature operating conditions of oil and gas gathering and transportation.

This invention relates to the field of petroleum processing aids technology, and discloses a crude oil demulsifier and its preparation method. The crude oil demulsifier prepared by this invention differs from traditional demulsifiers that use linear polyethers as the main component. It is prepared by surface modification of hyperbranched polyether with Fe3O4@MOF-Cu nanomaterials, followed by mixing with water and methanol. This demulsifier not only achieves efficient demulsification during crude oil demulsification but can also be recycled, reducing demulsification costs.

This invention discloses a novel cross-linked polymeric demulsifier and its preparation method. Specifically, it uses a polyoxyethylene / polyoxypropylene block polyether demulsifier as a base, which undergoes esterification of terminal hydroxyl groups, followed by a Michael addition reaction with ethylene amine to obtain the cross-linked polymeric demulsifier. This novel cross-linked polymeric demulsifier exhibits low organochlorine residue, a simple production process, mild reaction conditions, controllable molecular weight, and uniform molecular weight distribution. In application, it offers significant advantages such as high demulsification efficiency, rapid demulsification speed, low dosage, and low demulsification temperature, as well as broad applicability to various crude oil emulsions.

The present application relates to a kind of sea urchin type demulsifier with glucose as raw material and preparation method and application, the preparation method includes the following steps: S1, with glucose as raw material, prepare carbon ball containing hydroxyl on surface by hydrothermal reaction;S2, maleic anhydride is grafted to the surface of carbon ball by esterification reaction, and intermediate product is obtained;S3, by thiol-alkene click reaction, alkyl mercaptan is grafted to intermediate product, and demulsifier is obtained.The demulsifier of the present application has a hydrophilic center core and several hydrophobic branches, has high demulsification efficiency, the light transmittance of water phase after demulsification is high, and emulsion oil removal rate can reach more than 99%.

The invention discloses a demulsifier and a preparation method thereof, and belongs to the technical field of demulsifiers. The preparation method of the demulsifier comprises the following steps: adding ferric trichloride hexahydrate, sodium acetate and polyethylene glycol into a polyol solvent, uniformly mixing at 60-80 DEG C, then adding bentonite, carrying out ultrasonic dispersion for 20-40 minutes, then reacting at 180-250 DEG C for 20-30 hours, washing and drying; carrying out ultrasonic dispersion on the obtained magnetic bentonite in an organic solvent for 15-30 minutes, adding a silane coupling agent, stirring for 6-10 hours at 70-85 DEG C, collecting a magnet, washing and drying; and carrying out ultrasonic dispersion on the obtained silanized magnetic bentonite in an organic solvent for 15-30 minutes, dissolving an acrylate copolymer demulsifier and a sulfonate demulsifier in the organic solvent, then adding 4-dimethylaminopyridine, carrying out ultrasonic dispersion for 10-20 minutes, then adding into a silanized magnetic bentonite solution, stirring for 4-6 hours at 85-110 DEG C, and carrying out magnet collection, washing and drying, so as to obtain the water-soluble magnetic bentonite. The demulsifying agent is obtained. The demulsifier is safe and environment-friendly, and can repeatedly and efficiently realize demulsification.

The invention discloses a flocculating agent for machine cleaning wastewater of a pesticide missible oil preparation and application of the flocculating agent. The flocculating agent is prepared from the following components in parts by weight: 50-60 parts of an inorganic flocculating agent, 35-45 parts of an organic flocculating agent, 8-12 parts of a demulsification aid and 4-6 parts of a pH regulator. The flocculant disclosed by the invention is good in demulsification effect, high in COD removal rate, high in treatment efficiency, strong in floc stability, economical in cost and wide in wastewater adaptability, and solves the problems of poor demulsification effect, low COD removal rate, large flocculant dosage and the like when an existing flocculant is used for treating pesticide missible oil preparation cleaning wastewater.

The present application relates to a kind of demulsifiers and its preparation method and application.The preparation method includes the following steps: (1) glycerol and p-hydroxy isophthalic acid are mixed, esterification is carried out, and branched prepolymer is obtained;(2) branched prepolymer is mixed with L-arginine, and amide reaction is carried out, and branched body is obtained;(3) branched body is mixed with carboxyl-terminated agent, and amide reaction is carried out, and the demulsifier is obtained.The demulsifier prepared by the specific preparation method can realize the efficient demulsification of high-salt crude oil emulsion, has the advantages of low toxicity, high demulsification efficiency, wide pH range, biodegradable.