21 results about "BTEX" patented technology

The present invention relates to a technique for appropriately adsorbing an organic fluorine compound (PFAS) represented by PFOA / PFOS, harmful organic chemical substances such as BTEX, agrochemical substances, heavy metals, and the like, which have flowed out into an environment such as soil. The main purpose of the present invention is to provide a technique capable of effectively dispersing a porous carbon material, which is an adsorbent material, in a liquid. As a result of in-depth studies, the present inventors have found that a porous carbon material can be effectively dispersed in a liquid by using an ionic biodegradable polymer as a dispersant.

The present invention discloses a bacterium that degrades benzene series, a biological detoxification agent, and its use. The deposit number of the bacterium LH-HF0020 is CGMCC No. 27555. The bacterium LH-HF0020 can grow normally in the NaCl range of 0% to 10%, has strong salinity tolerance, and can help degrade benzene series and COD in a 3% high-salt environment. Cr The present invention provides a simple, rational, and quick method for preparing the Rhodococcus etheriferous fermentation broth. It significantly improves COD removal and total nitrogen degradation in the biochemical system without changing the structure. The method has strong BTEX detoxification capabilities, high-salt COD removal, and total nitrogen degradation, demonstrating promising prospects for industrialization.

A process for treatment of C9+ aromatic complex bottoms feedstream that includes reacting the feedstream in the presence of a hydrodearylation catalyst and hydrogen under specified reaction conditions for hydrodearylation to produce liquid effluents containing dearylated hydrocarbons and separating the liquid effluents into a BTEX-rich fraction and a solvent fraction, and recovering the solvent fraction.

A device (1A) for detection of a BTEX component (3A) in a phase (5A) comprising a sensor (7A) for producing a signal (S) representative of the detection, the sensor comprising a layer (9A) of a material (11A) intended to be in physical contact with the phase, the material comprising a polymer including a sequence of the following formula: (I) wherein R-Bz is a unit repeated n times, n is an integer greater than 10, R is an organic group, and Bz is a substituted benzyl group of the following formula: (Bz) wherein at least three independently selected ones among Z1, Z2, Z3, Z4 and Z5 are fluorine atoms, and the at most two others are selected among hydrogen, halogen atoms, and C1 to C2 alkyl groups.

The invention relates to the technical field of microorganisms and environmental protection, and discloses a BTEX facultative anaerobic degrading bacterium and application thereof, the BTEX facultative anaerobic degrading bacterium is Rhodococcus sp. HB3, and the preservation number of the BTEX facultative anaerobic degrading bacterium is GDMCC No: 63282. The rhodococcus HB3 can efficiently degrade benzene, methylbenzene, dimethylbenzene and ethylbenzene, and is good in universality; the rhodococcus HB3 can rapidly grow in a micro-aerobic (2-8%) environment at 10-37 DEG C, the salt tolerance can reach 3.0%, and the rhodococcus HB3 can adapt to a low-oxygen and salinized oil sludge polluted soil environment, so that the strain has a good removal effect on benzene series in oil sludge polluted soil and has an engineering application prospect.

The present invention relates to the field of catalytic cracking, and discloses a method for producing naphtha rich in light aromatics by heavy diesel. The method includes: hydrogen and heavy diesel are subjected to a first contact reaction with a hydrotreating catalyst to obtain a hydrotreating effluent having an organic nitrogen content of 5 50 μg / g; under a variable pressure condition where an initial pressure of 2 8 MPa and a terminal pressure of 15 20 MPa, the hydrotreating effluent is subjected to a second contact reaction with a hydrocracking catalyst, the hydrocracking catalyst including a carrier and a Group VIB metal component supported on the carrier, the carrier containing an MFI molecular sieve; the hydrocracking effluent obtained is fractionated to obtain a naphtha fraction. The yield of benzene in the light naphtha fraction (C5 C7) obtained by the method reaches more than 13%, and the yield of BTEX in the gasoline fraction C6 C8 reaches 47.1%, and the yield of benzene and the yield of BTEX are significantly improved.

Disclosed are methods and systems for quantitation of benzene, toluene, ethyl benzene, o-xylene, m-xylene, and p-xylene. High-performance liquid chromatography using a carbon stationary phase and a gradient mobile phase is performed. The carbon stationary phase can be a porous graphitic carbon stationary phase. The mobile phase includes an organic acid in water and an alcohol. The organic acid can include formic acid, and the alcohol can include methanol. The methods and systems achieve a resolution between xylene isomer peaks of greater than 2.0.

The application discloses a kind of barren water Bacillus and its application in the degradation of composite organic pollution of underground water or soil, the bacterium is named barren water Bacillus (Bacillus inaquosorum) LH-BTEX-1, on July 30, 2024, is preserved in China Microorganism Strain Preservation Management Committee General Microorganism Center, and the preservation number is CGMCC No.31495;The above-mentioned Bacillus can effectively degrade composite organic pollution of underground water or soil, can simultaneously efficiently repair benzene series and phenol underground water and soil capacity, the above-mentioned Bacillus is low in price, green economy, easy to prepare, and repair time is short, with good long-term stability, especially suitable for the repair of benzene series and phenol contaminated underground water and soil.

A device (1A) for detection of a BTEX component (3A) in a phase (5A) comprising a sensor (7A) for producing a signal (S) representative of the detection, the sensor comprising a layer (9A) of a material (11A) intended to be in physical contact with the phase, the material comprising a polymer including a sequence of the following formula: (I) wherein R-Bz is a unit repeated n times, n is an integer greater than 10, R is an organic group, and Bz is a substituted benzyl group of the following formula: (Bz) wherein at least three independently selected ones among Z1, Z2, Z3, Z4 and Z5 are fluorine atoms, and the at most two others are selected among hydrogen, halogen atoms, and C1 to C2 alkyl groups.

This application discloses a method and extraction head for the detection of benzene series compounds. A PAM / CNMs composite extraction head is prepared, and benzene series compounds are extracted from the headspace using this composite extraction head. The benzene series compounds are BTEX, PMA, and DPA. Gas chromatography-mass spectrometry (GC-MS) is constructed, and the benzene series compounds are detected using the extraction head. The advantages are that the PAM / CNMs composite extraction head has better extraction efficiency and mechanical stability for benzene series compounds. Applying the method of this application to the detection of benzene series compounds in actual samples demonstrates good sensitivity and practicality.

The invention discloses gram-positive staphylococcus and application of the gram-positive staphylococcus in degradation of benzene series, the gram-positive staphylococcus is named as Staphylococcus ureiticus B1, the taxonomic name of the gram-positive staphylococcus is Staphylococcus ureiticus B1, the gram-positive staphylococcus is preserved in Guangdong Microbial Culture Collection Center on May 22, 2025, and the preservation number of the gram-positive staphylococcus is GDMCCNO.66370. The gram-positive staphylococcus is named as Staphylococcus ureiticus B1, and the gram-positive staphylococcus is named as Staphylococcus ureiticus B1, is named as Staphylococcus ureiticus B1, and is preserved in the Guangdong Microbial Culture Collection Center on May 22, 2025. The Gram-positive staphylococcus capable of degrading the benzene series is obtained through environment screening and can survive in the environment with the benzene series as the unique carbon source, and experiments prove that the Gram-positive staphylococcus has efficient degradation capacity on the benzene series and can directionally degrade the benzene series, and a new path is provided for BTEX pollution treatment.

The present invention provides an application of a metal-organic framework material JNU-2 in separating chemical benzene compounds and / or hexane isomers. The application adopts a penetration test for separation, comprising the following steps: (1) first activating the metal-organic framework material JNU-2; (2) filling 0.7-1.2 g of the metal-organic framework material JNU-2 powder into a stainless steel column filled with silica glass wool, and performing an ionization reaction at a temperature of 353 K and a carrier gas of helium at a flow rate of 3.0-20 mL min ‑1 Penetration experiments with gaseous mixtures of two or more chemical benzene compounds or hexane isomers were conducted. The material's interconnected channels and pores, along with a window aperture of approximately #imgabs0#, are larger than the kinetic diameters of #imgabs1# and #imgabs2# but comparable to #imgabs3#. This prevents oX molecules from diffusing into the internal cavity of JNU‑2, as is the case with other BTEX molecules. Furthermore, this value is within the molecular size range of hexane isomers, effectively excluding the slightly larger 22DMB molecule.

A device (1A) for detecting a BTEX component (3A) in a phase (5A), said device (1A) comprising a sensor (7A) for generating a signal (S) representative of the result of the detection, said sensor comprising a layer (9A) of a material (11A) intended to be in physical contact with said phase, the material comprising a polymer comprising the following sequence: (I) in which R-Bz is a unit repeating n times, n is an integer greater than 10, R is an organic group, and Bz is a substituted benzyl group of formula: (Bz) in which at least three of Z1, Z2, Z3, Z4, and Z5 are independently selected from fluorine atoms, and at most the other two are selected from hydrogen, halogen atoms, and C1-C2 alkyl groups.

The invention relates to the technical field of microbial remediation of environmental pollution, in particular to a BTEX degrading bacterium in a contaminated site of petrochemical enterprises in a coastal saline-alkali area as well as a screening method and application of the BTEX degrading bacterium, the BTEX degrading bacterium is Pseudomonas sp. LO-A1 and is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number of the BTEX degrading bacterium is CCTCC No: M20231888. The pseudomonas sp. LO-A1 has the advantages that the degradation efficiency of the pseudomonas sp. LO-A1 on the benzene series is high, and the good degradation effect on the benzene series under the condition of high salinity and alkalinity is also realized. Benzene series in water are degraded through the strain, the purpose of removing pollutants can be achieved, intermediate products are thoroughly degraded, the operation cost is low, negative influences on the environment are small, and the strain has good development and utilization prospects.

The invention relates to the technical field of fluorescent materials, and particularly discloses a fluorescent sensing material as well as a preparation method and application thereof. The fluorescent sensing material is a carborane-containing boron-oxygen multiple resonance fluorescent derivative, boron-oxygen multiple resonance molecules are combined with ortho-carborane, so that the fluorescent sensing material has a unique structure, and the structure can effectively capture BTEX gas molecules, so that the fluorescent sensing material is subjected to fluorescence quenching; therefore, efficient detection of the BTEX gas is realized. The boron-oxygen multi-resonance fluorescent sensing material containing carborane prepared by the invention can realize specific detection on BTEX steam, and shows excellent properties such as high response speed, short recovery time, low detection limit, recoverable utilization and large Stokes shift. By utilizing the method, the problems of expensive detection equipment, complicated operation and low detection sensitivity of the existing BTEX gas detection method are effectively solved.

According to one or more embodiments of the present disclosure, a multi-stage process for upgrading mixed pyrolysis oil containing polycyclic aromatic compounds to benzene, toluene, ethylbenzene, and xylenes (BTEX) includes blending a light pyrolysis oil with a heavy pyrolysis oil to form a mixed pyrolysis oil; upgrading the mixed pyrolysis oil in a slurry-phase reaction zone to produce an intermediate product, the slurry-phase reaction zone comprising a mixed metal oxide catalyst; and hydrocracking the intermediate product in a fixed-bed reaction zone to produce BTEX, the fixed-bed reaction zone comprising a mesoporous zeolite-supported metal catalyst.

The present invention relates to an improved process and system for purifying a gas, preferably an energy gas, containing aromatic compounds and isolating a fraction of aromatic compounds from said gas. In the process according to the invention, the gas is contacted with a washing liquid in step (a), at a temperature of 15 –250 °C, to obtain a purified gas, which is depleted in aromatic compounds, and a spent washing liquid wherein the aromatic compounds are dissolved. The spent washing liquid is stripped in step (b) with a stripping gas comprising at least 0 vol.% steam, to obtain a stripped washing liquid which is advantageously reused in step (a) and a loaded stripping gas comprising the aromatic compounds. The aromatic compounds are separated from the loaded stripping gas in step (c) by condensation of the steam and / or the aromatic compounds comprised in the loaded stripping gas to obtain an immiscible composition and isolating the aromatic compounds therefrom. The cleared stripping gas which is advantageously reused in step (b).

The invention discloses inorganic modified sodium-based stripped montmorillonite for adsorbing and removing arsenic in mining area wastewater and a preparation method of the inorganic modified sodium-based stripped montmorillonite, and belongs to the technical field of environmental functional materials and wastewater treatment. Aiming at the characteristics of high acidity and complex components of arsenic-containing wastewater in the Guangxi mining area, the method comprises the following steps: firstly, efficiently stripping natural sodium bentonite (BT) by utilizing a microwave hydrothermal-ultrasonic synergistic method, and remarkably increasing the specific surface area and active sites of the natural sodium bentonite to obtain stripped bentonite (BTex); then, BTex and cellulose nanofibers (CNF-C) with the surfaces rich in carboxyl are compounded under the microwave condition, and the CNF-C / BTex composite material is prepared. The material combines the good adsorption performance of BTex on heavy metals and the three-dimensional network skeleton advantages of CNF-C, and has the advantages of large adsorption capacity, fast dynamics, wide pH adaptation range (3-7) and the like on arsenic pollutants. The preparation process is simple, efficient, low in cost and environmentally friendly, and an efficient and practical new technical scheme is provided for treatment of arsenic pollution in Guangxi mining areas.

The present invention provides processes for converting one or more bio-oils (C1-C5 alcohols and / or water with or without co-feed) to one or more C2-C5 olefins and / or one or more aromatic compounds. In one exemplary aspect, the process may be a single stage process performed in a reactor for the direct conversion of one or more bio-oils to a mixture of olefinic (e.g., C2-C5) and aromatic (e.g., BTEX) using one or more catalysts, the catalyst comprises a zeolite doped with one or more dopants and a doped or undoped alumina catalyst. Systems for performing these methods are also provided.