118results about "Refining with aqueous alkaline solutions" patented technology

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

The present disclosure relates to a method for processing of liquefied waste plastics (LWP). The method includes subjecting a liquefied waste plastic-based feedstock to heat treatment (HT processing) in an aqueous solution containing alkali metal hydroxide and / or alkaline earth metal hydroxide to form a heat treated effluent, transferring the heat treated effluent to a separator, subjecting the heat treated effluent to phase separation to isolate at least an oil phase including treated LWP and an aqueous phase including contaminated material, and recycling at least a part of the aqueous phase back to the HT processing.

The invention relates to the technical field of distillate oil refining, and discloses a vacuum distillate oil deacidification method which comprises the following steps: S10, performing deacidification treatment on vacuum distillate oil and a deacidification agent in a deacidification unit; s20, carrying out extraction separation on the obtained deacidification agent to be generated and a back extraction agent in a back extraction mixing coalescer; s30, the separated supernatant liquid is conveyed to a back extractant regeneration device for regeneration treatment; s40, the separated lower-layer liquid enters a deacidification agent regeneration device to be subjected to regeneration treatment; the deacidification unit comprises one or more deacidification mixing coalescers, each of the deacidification mixing coalescers and the back extraction mixing coalescers comprises a shell, each shell is provided with a premixing area, a coalescence separation area and a settling separation area from top to bottom, structured packing is arranged in the premixing areas, and polar fiber bundles are arranged in the coalescence separation areas; the deacidification agent contains organic amine, a cosolvent and water. The method can be used for deacidification treatment of vacuum distillate oil with high viscosity and high acid value, and is wide in application range.

An improved method for processing liquefied waste plastics includes providing a liquefied waste plastic (LWP) feedstock for heat treatment (HT processing) with an aqueous solution containing a basic substance, subjecting the LWP feedstock to the heat treatment with the aqueous solution, followed by phase separation to result in at least a treated LWP material and an aqueous phase, determining the quality of the LWP feedstock by measuring at least one property of the LWP feedstock, the at least one property including at least the total acid number (TAN) of the LWP feedstock, and calculating an amount of the basic substance to be added in HT processing to reach a target pH level of the aqueous phase based on the at least one property of the LWP feedstock and the water-oil-ratio, and adding the calculated amount of basic.

A treatment composition for remediating for remediating hydrogen sulfide (H2S), carbon dioxide (CO2) and other contaminant(s) in a fluid, including: an organic or hydrocarbon based liquid; at least one hydroxide compound or a hydrate thereof; and sodium sulfide (Na2S) or a hydrate thereof.

The present invention relates to a process for refining pyrolysis oil and a unit for carrying out the process. The present invention further relates to refined pyrolysis oil that can be obtained or obtained by the process.

An aqueous treatment composition of crude oil and / or petroleum distillate for removing sulfur compounds from crude oil and / or petroleum distillate, and a treatment method using such a composition are disclosed. The composition has less than 0.5% by mass of a di- or tri-benzhydroxy compound, a strong base, less than 1% by mass of a divalent metal gluconate, the balance being water, and a pH of 9 or more. The treatment method includes the steps of adding the treatment composition to crude oil or petroleum distillate to form a mixture having 0.001% to 0.02% by mass of a di- or tri-benzhydroxy compound in the oil and 0.001% to 0.03% by mass of a divalent metal gluconate in the oil, and mixing them together.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

The invention belongs to the technical field of desulfurizer preparation, and particularly relates to a desulfurizer for oil extraction of oil and gas fields and a preparation method thereof. The desulfurizing agent for oil extraction of the oil and gas field is prepared from the following raw materials: N-octadecyl-1, 3-propane diamine, an ionic liquid and organic copper mixture, ammonium molybdate, lysine sodium, hydroxyethylidene diphosphonic acid, polyoxyethylene sorbitan monostearate and the balance of water. According to the desulfurizing agent for oil extraction of the oil-gas field, water is used as a solvent, N-octadecyl-1, 3-propane diamine, an ionic liquid and organic copper mixture and ammonium molybdate in raw materials are used as main desulfurizing components to remove organic sulfur and inorganic sulfur, and lysine sodium, hydroxyethylidene diphosphonic acid and polyoxyethylene sorbitan monostearate are added, so that the desulfurizing agent for oil extraction of the oil-gas field is obtained. Due to the synergistic effect of the raw materials, the efficient removal of inorganic sulfur and organic sulfur in oil extraction of an oil and gas field is realized.

The utility model relates to the technical field of waste oil regeneration, and discloses a waste white oil alkali washing device which comprises a tank body, a heating assembly is installed on the periphery of the tank body, a sleeve, a servo motor and a feeding pipe are sequentially and fixedly connected to the top of the tank body from left to right, and a liquid discharging pipe is fixedly connected to the bottom of the tank body. A stirring assembly is installed in the tank body, a top ring is slidably connected to the middle of a sleeve, a filtering barrel is fixedly connected to the bottom of the top ring, a connecting pipe is fixedly connected to the top of the top ring, an elastic assembly is installed in the middle of the top ring, a clamping block is slidably connected to the middle of the top ring, and a clamping groove is formed in the middle of the sleeve; and the middle part of the sleeve is slidably connected with a push rod. According to the utility model, firstly, waste white oil is input through the connecting pipe, and larger impurities can be filtered under the action of the filtering barrel at the bottom of the connecting pipe, so that the mixing efficiency of the waste white oil and a sodium hydroxide aqueous solution is ensured, and the impurities are prevented from blocking the pipeline.

A treatment composition for being added to petroleum based liquids for reducing total sulfur content in the petroleum based liquids, comprising: sodium sulfide and at least one hydroxide compound. A dosage of the treatment composition may be added to liquids containing sulfur, including crude oil and distillates of crude oil and then allowed to react with such liquids over a period of time, e.g., hours or days. By such reaction total sulfur content of the liquids may be reduced by more than 50%.

This invention relates to the field of distillate oil refining technology and discloses a method for deacidifying vacuum distillate oil. The method includes: S10, deacidifying the vacuum distillate oil and a deacidifying agent in a deacidification unit; S20, separating the obtained deacidifying agent and a back-extraction agent in a back-extraction mixing and coalescing unit; S30, conveying the separated upper layer liquid to a back-extraction agent regeneration unit for regeneration; and S40, sending the separated lower layer liquid into the deacidifying agent regeneration unit for regeneration. The deacidification unit includes one or more deacidification mixing and coalescing units, each including a shell. The shell has a premixing zone, a coalescence separation zone, and a sedimentation separation zone arranged from top to bottom. The premixing zone contains structured packing material, and the coalescence separation zone contains polar fiber bundles. The deacidifying agent contains organic amines, a co-solvent, and water. This method can be used for deacidifying high-viscosity and high-acid-value vacuum distillate oils and has a wide range of applications.

Systems and processes for removing sulfur compounds from a hydrocarbon stream. Sulfur compounds are extracted from a hydrocarbon feed stream with a caustic stream to provide a treated hydrocarbon stream and a rich caustic stream. The sulfur compounds in the rich caustic stream are oxidized in the presence of a catalyst to provide a lean caustic stream. The lean caustic stream is returned to extract sulfur from the hydrocarbon stream. Data such as a concentration of sulfurs species and degree of caustic saturation with the sulfur species in the rich caustic stream may be provided by a sensor, compared against other real-time or historical data and used to provide a recommended adjustment to process conditions associated with an extraction unit, or an oxidation unit, or both.

A post-treatment process for crude biodiesel containing residual monoacylglycerol (MAG) and including contacting said crude biodiesel with a concentrated alkaline solution, double counter-current washing each followed by a phase separation and drying. The process is economical in chemicals and washing water.

The invention relates to a process for treating biomass oil comprising: (a) a step of supplying biomass oil selected from biomass pyrolysis oil, biomass hydrothermal liquefaction oil, lignin oil, and mixtures thereof; (b) a step of oxidizing the biomass oil supplied in step (a) in the presence of an oxidizing agent at a temperature of 90 °C or lower, this step producing an effluent containing at least partially oxidized biomass oil and water; (c) a step of distilling the effluent from step (b) under reduced pressure, separating a distillate containing water from a residue under vacuum to form a stabilized biomass oil with a reduced water content. Figure 1

Aqueous treatment compositions for crude oil and / or petroleum distillates to remove sulfur compounds therefrom and treatment methods using such compositions are disclosed. The composition has less than 0.5% wt / wt di- or tri-benzohydroxy compound, a strong base, less than 1% wt / wt divalent metal gluconate, a balance of water, and a pH that is 9 or greater. The treatment method includes adding said treatment composition to crude oil or a petroleum distillate to form a mixture having 0.001% to 0.02% wt di- or tri-benzohydroxy compound / wt oil and 0.001% to 0.03% wt divalent metal gluconate / wt oil and mixing the same together.

The present invention relates to the field of re-refining or regeneration of used lubricating compositions. More specifically, the present invention relates to a process for purifying lubricating oils, optionally at least partially re-refined by basic treatment under microwave irradiation, making it possible to obtain a lubricating oil having, in particular, a reduced silicon content, suitable for use as a base oil for the formulation of a new lubricating composition.

A problem arises when purifying a triglyceridic and / or free fatty acid feedstock for renewable hydrocarbon production, where such feedstock comprises C2-C6 aliphatic oxygenates, as they are transferred to the aqueous wastewater during the course of the purification, and which contributes to the degree of pollution of the aqueous wastewater measured as the chemical oxygen demand. The aqueous wastewater is extracted with the purified feedstock for renewable hydrocarbon production, which reduces the chemical oxygen demand of the aqueous wastewater by extracting the C2-C6 aliphatic oxygenates therefrom, while maintaining the purified feedstock for renewable hydrocarbon production in a quality that can be directly processed in a hydrotreating step, where the extracted C2-C6 aliphatic oxygenates are also converted to valuable hydrocarbons.

The invention discloses a crude oil sewage desulfurizing agent and a preparation method thereof, and belongs to the field of desulfurization, and the crude oil sewage desulfurizing agent comprises the following components in parts by weight: 5-10 parts of triazine; 10 to 20 parts of N-methyldiethanolamine; 0.01 to 0.03 part of a defoaming agent; 3-6 parts of a metal organic framework material; 0.05 to 2 parts of a silanol compound; 62 to 82 parts of water; the invention further discloses a preparation method of the crude oil and sewage desulfurizer, hydrogen sulfide in crude oil or sewage can be rapidly removed, the desulfurization rate at the high temperature reaches 98% or above, the product is soluble in water, and oil and gas well production and sewage treatment are not affected.

A novel process for making steam cracker feedstocks from contaminated pyrolysis oil, e.g., derived from waste plastics. The process utilizes an alkali hydroxide hydrolysis to clean the pyrolysis oil. The clean pyrolysis oil is then sent to an isocracking section to prepare high quality steam cracker feedstock. Some products can be sent to a steam cracker as feedstocks, while others can be recycled back into the system to improve feedstock yield. This recycling can also be done for better heat management.

The invention relates to a method for purifying a composition comprising a plastic liquefaction oil, wherein: (a) a plastic liquefaction oil composition is provided, then (b) washed with a first aqueous solution to obtain an organic phase containing the washed composition and a first aqueous effluent, then (c) the organic phase from step (b) is treated in the presence of a basic compound at a temperature of at most 450°C to obtain an organic effluent comprising a treated composition, and (d) the organic effluent from step (c) is washed with a second aqueous solution to obtain a purified composition having a reduced heteroatom content, and a second aqueous effluent. In addition, during step (b), the first aqueous effluent is entirely or partially returned to step (d), and / or during step (d), the second aqueous effluent is entirely or partially returned to step (b).

Embodiments of the present disclosure relate to hydrocarbon purification, in particular waste plastic purification using alkali wash.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

The utility model relates to a treatment device for extracting crude phenol from phenol-containing distillate oil and realizing zero discharge of wastewater, which comprises an alkali preparation tank, an extraction pipeline at the top of a crystallizer is connected with the alkali preparation tank, the alkali preparation tank is respectively connected with the upper part of an alkaline washing tower, the upper part of a regenerator and the upper part of an adsorption tower, and the lower part of the alkaline washing tower is connected with a phenol-containing distillate oil pipeline; the bottom of the alkaline tower is connected with the upper part of the stripping tower through a pipeline; the bottom of the stripping tower is connected with the decomposition tower through a pipeline; the decomposition tower is connected with the upper part of the extraction machine; an extraction pipeline at the top of the extraction machine is connected with the lower part of the regenerator; a bottom extraction pipeline of the regenerator is connected with the decomposition tower, a bottom extraction pipeline of the adsorption tower is connected with the upper part of the complexing tank, a regeneration outlet of the adsorption tower is connected with the decomposition tower, and the complexing tank is connected with the crystallizer. The device provided by the utility model can realize extraction of crude phenol from carbolic oil and zero discharge of wastewater, and thoroughly solves the environmental protection problem in the process of acid-base phenol extraction from coal tar.

One exemplary embodiment can be a process for oxidizing one or more thiol compounds from an alkaline stream. The process may include passing a mixed stream having the alkaline stream to a vessel having an oxidation section, a separation section and a vent gas section. Often, the oxidation section includes a body containing one or more packing elements. The process can further include passing an oxidized alkaline stream to the separation section containing a first chamber and a second chamber. Usually, the first chamber contains a coated mesh and packing. The two sections further form a neck contains a packing, a distributor, and a mesh.

The present invention relates to a process for purifying a pyrolysis oil comprising an extraction step prior to a thermal treatment step, a production unit for carrying out said process and a purified pyrolysis oil obtained or obtainable by said process.