25results about "Refining with two or more solvents" patented technology

A production method of a rubber plasticizer is characterized in that a solvent extraction method is used, a first solvent comprises one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide and enters the upper portions of a first extraction tower and a second extraction tower, a second solvent is alkane and / or cycloalkane with the carbon number of 6-20 and enters the lower portions of the three extraction towers, raw material oil is extract oil, and the second solvent is one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide. Raw oil enters from a middle feed port of the first extraction tower; raffinate flowing out of the top of the first extraction tower enters a middle feed port of the second extraction tower after part of the solvent is recovered; evaporating secondary raffinate flowing out from the top of the second extraction tower to recover the solvent, thereby obtaining the rubber plasticizer; heating a material flowing out from the top of the third extraction tower, recovering part of solvent, pumping into a raw oil inlet of the primary extraction tower by using a pump, mixing with raw oil, and entering the primary extraction tower; and evaporating the effluent extract at the bottoms of the first extraction tower and the third extraction tower to recover the solvent to obtain secondary extract oil.

Provided are: an extractant with which one or more substances selected from among solutes and dispersed substances contained in lubricating oil compositions can be easily extracted; and an extraction method in which the extractant is used.　Specifically, the extractant comprises a deep eutectic solvent which is a product of mixing one or more nonionic hydrogen-bond donors with one or more nonionic hydrogen-bond acceptors. In the extraction method, the extractant is used.

A method for stepwise extraction of phenol and pyridine compounds in naphthalene oil by deep eutectic solvents includes: mixing the naphthalene oil with alkane and the deep eutectic solvents, and performing phase separation to obtain a eutectic extracting phase and a raffinate phase; mixing the extracting phase with a first stripping agent, and performing phase separation to obtain a first stripping phase and recyclable deep eutectic solvents; distilling the first stripping phase to obtain a heteroatom mixture; and mixing the heteroatom mixture with a hydrogen bond acceptor extractant and alkane, and performing phase separation to obtain a phenol-containing extracting phase and a pyridine-containing raffinate phase; and mixing the phenol-containing extracting phase with a second stripping agent, performing phase separation to obtain a phenol-dissolved stripping solution and the hydrogen bond acceptor, and distilling the second stripping solution or the pyridine-containing raffinate phase to obtain a phenol or a pyridine product.

The present disclosure relates to a process for recovering aromatic compounds from a hydrocarbon feed comprising a mixture of aromatic and non-aromatic compounds, particularly from C5-C11 hydrocarbon fraction from different refinery streams. The recovery of the aromatic compounds comprises a solvent based extractive distillation, and separation of the aromatic compounds and the solvent. The process of the present disclosure can effectively separate aromatic and non-aromatic compounds and increases the overall aromatic yield in naphtha reforming process. Further, the process maximizes the recovery of the aromatic compounds in the C5-C11 hydrocarbon feed.

In this invention, a method for the production of base oil from waste oil is elucidated, comprising the following stages: (a) The substantial removal of pollutants and asphalts from waste oil using a precipitating agent and an accelerant agent for precipitation, utilizing a solvent or without using a solvent. (b) The removal and recovery of the solvent and other low-boiling-point compounds. (c) The elimination of remaining pollutants in the base oil through an acidic agent. (d) Enhancement of color and acidity of the produced base oil. (e) Optionally, use the hydrogenation process. Moreover, in this invention, valuable materials such as microspheres and organic or mineral salts are produced from the wastes generated in the aforementioned stages. Which is produced through the mixing of the generated waste in the stages of producing base oil from waste oil, under appropriate conditions, and, through several processes, the resulting products are purified.

A process and system to deasphalt used motor oil distillate residue including VTAE the process including feeding the used motor oil distillate residue and a supercritical solvent to an asphaltene separator that outputs an overhead having deasphalted oil and a bottoms that includes pitch.

The present application provides a method for extracting a phenol compound and a pyridine compound from naphthalene oil stepwise by using a deep eutectic solvent (DES). The method comprises: step 1, mixing a naphthalene oil with an alkane and a DES and performing liquid separation on the mixture to obtain a deep eutectic extraction phase and a solvent raffinate phase; step 2, mixing the deep eutectic extraction phase with a first back-extraction agent and filtering the mixture to obtain a first back-extraction phase and a recyclable DES; step 3, distilling the first back-extraction phase to obtain a heteroatom mixture, mixing the heteroatom mixture with a hydrogen-acceptor-type deep eutectic extraction agent and an alkane, and performing liquid separation on the mixture to obtain a deep eutectic phenol compound extraction phase and a pyridine compound and alkane raffinate phase; and step 4, mixing the phenol compound extraction phase with a second back-extraction agent and filtering the mixture to obtain a phenol-containing second back-extraction solution and a hydrogen-acceptor-type extraction agent. A phenol product is recovered from a second back-extraction agent solution by distillation. The DES is tetraethylammonium chloride, tetrabutylammonium chloride, tetrabutylammonium bromide or tetrabutylphosphonium bromide, and glycolic acid, oxalic acid, citric acid, or p-toluenesulfonic acid.

The present invention relates to an improved method for treating liquefied waste plastic, comprising: providing a volume of oil based on liquefied waste plastic; heat treating the volume of LWP-based oil; phase-separating the resulting heat-treated mixture volume into a first aqueous phase volume and a first oil phase volume; separating out a first aqueous phase volume; adjusting the pH of the first aqueous phase volume to a pH 9.0 or less; and separating the pH-adjusted volume phase into at least a second aqueous phase volume and a second oil phase volume.

A fluidized catalytic conversion system is disclosed, which comprises a reaction unit, a catalyst separation unit, and a catalyst regeneration unit. The reaction unit comprises a first fluidized bed reactor and a second fluidized bed reactor connected in series, or comprises a composite fluidized bed reactor having a first reaction zone and a second reaction zone connected in series. The catalyst separation unit comprises a disengager and a catalyst separator arranged inside or outside the disengager. The catalyst regeneration unit comprises a first catalyst regenerator and a second catalyst regenerator, or comprises a composite catalyst regenerator provided with a first regeneration zone and a second regeneration zone. The fluidized catalytic conversion system can allow the reaction raw materials to undergo different reactions in different reactors or reaction zones under more suitable catalysts and reaction conditions, thereby improving the yield of the target products.

The method according to the invention comprises the following steps: (a) a stripping step in a stripping vessel (1); (b) a first liquid-liquid extraction step in the first extraction vessel (2), wherein an aprotic solvent is used as the extraction medium; and (c) a second liquid-liquid extraction step in a second extraction vessel (3), in which a protic solvent is used as the extraction medium, in which steps (a)-(c) can be applied in any order. The use of this process allows for the purification of the hydrocarbon composition to such an extent that the content of chlorine-containing compounds can be reduced to less than 1 ppm by weight. This low chlorine content is desirable for processing of hydrocarbon compositions in a number of different chemical processing operations, such as steam cracking operations. The presence of higher levels of chlorine-containing compounds may lead to equipment corrosion during these processes, which may lead to, for example, a reduction in time between equipment failure and / or equipment maintenance cycles. In view of the significant influence on the economical efficiency of the method, the existence of chlorine-containing compounds is obviously expected to be avoided to any extent.

The invention relates to a preparation method of a rubber plasticizer, which is characterized in that a solvent extraction method is used, double solvents and double extraction towers are used, a first solvent comprises one of phenol, furfural, N-methyl pyrrolidone and dimethyl sulfoxide, a second solvent is alkane and / or naphthenic hydrocarbon with the carbon number range of 6-20 carbons in molecules, and a third solvent comprises one or more extraction towers. The raw oil is extracted oil generated by extracting and refining wax oil or deasphalted oil with the distillation range of 350-600 DEG C, the extraction is carried out in two extraction towers, and each extraction tower is provided with three feed ports which are respectively positioned at the upper part, the middle part and the lower part of the extraction tower; the method comprises the following steps: carrying out solvent extraction on raw oil by adopting a first solvent and a second solvent to obtain raffinate and extract, separating the solvent in the raffinate to obtain primary raffinate, and heating the primary raffinate to evaporate the solvent to obtain raffinate oil; carrying out secondary solvent extraction on the raffinate oil by adopting a first solvent and a second solvent to obtain a secondary raffinate and a secondary extract; and heating the secondary raffinate to evaporate the solvent to obtain the rubber plasticizer.

The present invention addresses the problem of providing a method for efficiently removing nitrogen-containing compounds and halogen-containing compounds from a liquid organic compound containing nitrogen-containing compounds and halogen-containing compounds, preferably a waste plastic decomposition oil.　The present invention includes a method for purifying a liquid organic compound, the method comprising a step for bringing a liquid organic compound (RM) containing nitrogen-containing compounds, halogen-containing compounds, and hydrocarbon compounds into contact with a monofunctional organic compound (A) and a bifunctional compound (B) and then separating the monofunctional organic compound (A) and the bifunctional compound (B).　The method satisfies the following requirements (i) to (iv). (i) The monofunctional organic compound (A) is a compound containing carbon, hydrogen, and oxygen, and the Hansen solubility parameter value [HSP-a] is 15-35 MPa0.5. (ii) The bifunctional compound (B) is a compound containing two or more elements selected from carbon, hydrogen, and oxygen, and the Hansen solubility parameter value [HSP-b] is 20-60 MPa0.5. (iii) The value of [HSP-b]-[HSP-a] is 3-40 MPa0.5. (iv) The mass ratio of the monofunctional organic compound (A) to the bifunctional compound (B) is 10 / 90 to 95 / 5.

The invention provides a separation method and a separation device for aromatic hydrocarbon and alkane in FCC diesel oil, and the separation method comprises the following steps: 1) mixing to-be-separated FCC diesel oil with a first solvent to obtain diluent oil; 2) performing extraction treatment on the diluent oil by using a second solvent to obtain raffinate oil and extracted oil; wherein the second solvent is a mixed solvent comprising at least two or more solvents; the absolute value of the difference value between the average molecular polarity index of the first solvent and the average molecular polarity index of the FCC diesel oil to be separated is less than 5; the difference value of the average molecular polarity indexes of the second solvent and the first solvent is greater than 10. According to the method for separating the aromatic hydrocarbons and the alkanes in the FCC diesel oil, provided by the invention, the separation selectivity of the aromatic hydrocarbons in the FCC diesel oil is high, and the removal rate of the aromatic hydrocarbons is high.

The invention provides a separation method and a separation device for aromatic hydrocarbon and alkane in straight-run diesel oil, and the separation method comprises the following steps: 1) mixing straight-run diesel oil to be separated with a first solvent to obtain diluent oil; 2) performing extraction treatment on the diluent oil by using a second solvent to obtain raffinate oil and extracted oil; (3) carrying out back extraction treatment on the extracted oil by utilizing a first solvent to obtain back extraction residual oil and back extraction oil; wherein the second solvent is a mixed solvent comprising at least two or more solvents; the absolute value of the difference value of the average molecular polarity indexes of the first solvent and the straight-run diesel oil to be separated is less than 5; the difference value of the average molecular polarity indexes of the second solvent and the first solvent is greater than 10. The method for separating aromatic hydrocarbons and alkanes in straight-run diesel oil provided by the invention can realize high separation selectivity and high removal rate of aromatic hydrocarbons in straight-run diesel oil.

The application provides a method for step-by-step extraction of phenolic and pyridine compounds in naphthalene oil by using a eutectic solvent, comprising the following steps: step 1, mixing naphthalene oil with an alkane and a eutectic solvent, and separating to obtain a eutectic extraction phase and a solvent raffinate phase; step 2, mixing the eutectic extraction phase with a first stripping agent, and filtering to obtain a first stripping phase and a recyclable DES; step 3, distilling the first stripping phase to obtain a heteroatom mixture; mixing the heteroatom mixture with a hydrogen acceptor type eutectic extraction agent and an alkane, and separating to obtain a eutectic phenolic compound extraction phase and a pyridine compound alkane raffinate phase; step 4, mixing the phenolic compound extraction phase with a second stripping agent, and filtering to obtain a second stripping solution of phenol and a hydrogen acceptor type extraction agent; and distilling to recover the phenol product in the second stripping agent solution. The eutectic solvent is tetraethylammonium chloride, tetrabutylammonium chloride, tetrabutylammonium bromide or tetrabutylphosphonium bromide, and the eutectic solvent is combined with glycolic acid, oxalic acid, citric acid or p-toluenesulfonic acid.

The invention relates to the field of petrochemical industry, and discloses a cascade extraction separation device and an extraction separation method. The cascade extraction and separation device comprises an extraction tower, the extraction tower is provided with a first extraction solvent inlet 1, a second extraction solvent inlet 2, a raw oil inlet 3, an extraction liquid outlet 5 and a raffinate outlet 6, the second extraction solvent inlet 2 is connected with a second extraction solvent feeding pipe arranged in the extraction tower, and the raw oil inlet 3 is connected with a raw oil outlet 4. And the second extraction solvent feeding pipe is provided with at least two second extraction solvent jet orifices 4 along the axial direction of the extraction tower. According to the method, a specific cascade extraction and separation device is adopted, and second extraction solvents are injected from second extraction solvent injection orifices at different heights in the extraction and separation device respectively, so that efficient separation of saturated hydrocarbons, few-ring aromatic hydrocarbons and polyring aromatic hydrocarbons in the aromatic hydrocarbon-rich heavy oil is realized.

The invention relates to a process for purifying a composition of hydrocarbon compounds comprising a plastic and / or elastomer liquefaction oil optionally mixed with biomass, comprising the following steps: (a) providing a composition of hydrocarbon compounds comprising a plastic and / or elastomer liquefaction oil optionally mixed with biomass, said composition containing at least 1% by mass of heteroatoms, (b) a liquid-liquid extraction step by contacting the composition provided in step (a) with a solvent consisting of at least one hydrocarbon compound free of heteroatoms, (c) a recovery step of a first and a second immiscible phase, the first phase containing the heteroatom-depleted composition and the solvent, while the second phase is enriched in heteroatoms.(d) a separation step in which the solvent is separated from the remainder of the first phase, forming a purified composition. Figure for the abstract: Figure 1,

The present disclosure provides a process and system for deasphalting a waste oil distillate residue including VTAE, the process including feeding the waste oil distillate residue and a supercritical solvent to an asphaltene separator, the asphaltene separator outputting an overhead having deasphalted oil and a bottoms distillate including pitch.

The present invention provides a medium and low temperature coal tar mesophase enriched aromatics equipment and process, and its process includes steps a and b, step a separation obtains light distillate oil-II based on paraffin, and this component is mixed with the light distillate oil-I obtained by distillation and modulated to be sold as light oil; the light phenol oil obtained by separation in step b and the enriched refined aromatics are high value-added fine chemicals. From the perspective of graded utilization, different high-value fine chemicals such as alkoxyphenols, naphthalene, alkylnaphthalene, anthracene, pyrene, benzo[ghi]perylene, etc. can be obtained by pressurized gradient column chromatography and fractional recrystallization. The present invention is operated under mild conditions, and the solvent used is recycled, with the characteristics of green and efficient, low energy consumption, low investment cost, etc., overcomes the shortcomings of traditional process production of condensed aromatics, such as long route, easy to produce secondary pollution, high production cost, and effectively enriches the source of condensed aromatics fine chemicals.

The invention relates to a method for purifying a composition of hydrocarbon compounds comprising a plastic and / or elastomer liquefaction oil optionally mixed with biomass, comprising the following steps: (a) providing a composition of hydrocarbon compounds comprising a plastic and / or elastomer liquefaction oil optionally mixed with biomass, said composition containing at least 1% by mass of heteroatoms, (b) a step of liquid-liquid extraction by bringing the composition provided in step (a) into contact with a solvent consisting of at least one heteroatom-free hydrocarbon compound, (c) a step of recovering a first phase and a second phase which are immiscible, the first phase containing the composition depleted in heteroatoms and the solvent, while the second phase is enriched in heteroatoms, (d) a separation step during which the solvent is separated from the rest of the first phase, forming a purified composition.

Producing a heavy aromatic fraction from fast pyrolysis oil includes combining fast pyrolysis oil and a first solvent to yield an emulsion; heating the emulsion to yield an organic phase and an aqueous phase; vapor stripping the organic phase with a second solvent to yield the heavy aromatic fraction and a condensate comprising the first solvent, the second solvent, and water; concentrating the aqueous phase to yield a water-soluble organic fraction, water, and light ends comprising organic compounds having 1-6 carbon atoms; combining the condensate with the light ends to yield a mixture; distilling the mixture to yield a first stream comprising the first solvent and water and a second stream comprising the second solvent; combining the first stream with the fast pyrolysis oil to yield the emulsion; and combining the second stream with the organic phase to yield the heavy aromatic fraction and the condensate.

A method for extraction and analysis of polycyclic aromatic hydrocarbons (PAHs) uses a solvent mixture that is effective for extraction and also compatible with disposable polypropylene solid phase extraction (SPE) tubes. The petroleum product is mixed with an organic solvent, then an extraction solvent made up of a volume ratio of 70:30 to 90:10 acetonitrile to ethyl acetate is added to the mixture. The organic solvent and PAHs are adsorbed in the extraction solvent mixture, leaving the oils behind. The extract, including the solvents and PAHs, can be transferred to a disposable SPE tube for further sample processing, analysis and disposal.

The present invention relates to a method for reducing the cloud point of a base oil with high saturates / paraffinic content to below 0°C, wherein the method comprises subjecting said base oils to a cloud point reduction step comprising adding said base oil to a solvent mixture, wherein the solvent mixture comprises a paraffinic naphtha fraction and a co-solvent to obtain a solvent treatment mixture; and subjecting the solvent treatment mixture to a solvent de-waxing step.