11results about "Refining with two or more solvents" patented technology

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.

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.

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 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 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.

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.