53 results about "BTEX" patented technology

Disclosed is a hydrocarbon-based concentrate composition for crosslinking polysaccharide polymers in an aqueous-based fluid, such as a fracturing fluid, wherein the hydrocarbon-based composition has no or substantially no detectable levels of benzene, toluene, ethylbenzene, and / or m-, o-, or p-xylenes (BTEX). Preferred polysaccharide polymers are galactomannan gums or derivatives thereof. The concentrate comprises an oleaginous solution, such as a hydrocarbon distillate, a crosslinking agent for crosslinking the polysaccharide polymer, preferably a sparingly soluble alkali metal or alkali metal alkaline earth metal borate, and a stabilizing / suspension agent, preferably a clay mineral selected from the group consisting of smectite clays. The concentrate may, optionally, contain a deflocculant and / or an anti-syneresis additive.

The invention discloses a bacillus amyloliquefaciens capable of degrading benzene compounds, wherein the 16S rDNA of the bacillus amyloliquefaciens has a sequence of SEQ ID No.1, the strain is pale orange red, round, smooth and humid with neat edges in a solid medium, and the diameter thereof of the strain is between 1 and 2 millimeters; the form of the bacillus amyloliquefaciens is a thicker bacilli and is about 10 micrometers in length; spores are formed and are oval; and the bacillus amyloliquefaciens is aerobic, gram-positive and contact oxidase negative, can use a BTEX mixture or a single substance as a unique carbon source, and can degrade the BTEX mixture efficiently.

The invention relates to a Zn modified multi-level pore HZSM-5 catalyst, a NaOH solution is used for alkali treatment of HZSM-5 molecular sieve to prepare the HZSM-5 (AT), the the HZSM-5 (AT) is mixed with binder pseudo-boehmite mixed stone and roasted to obtain industrial catalyst HZSM-5 (A-T) + A, and finally Zn (NO3) 2 modification of the HZSM-5 (A-T) + A is performed by equivalent-volume impregnation method to obtain Zn / (HZSM-5 (A-T) + A). The alkali modified industrial catalyst is used in liquefied gas aromatization reaction, due to the formation of a small amount of mesopores, the stability is improved; and after combination of alkali modification and Zn modification, the stability is improved, at the same time due to the existence of proper amount of Zn-L medium-strong acid center, he synergetic catalysis effect of B and L acid and strong and weak acids can be improved, splitting action of strong B acid and the generation of C9 + in liquid aromatic hydrocarbons can be reduced, and the BTEX selectivity can be improved.

The invention discloses a method for measuring the benzene and BTEX content of polypropylene fiber bundles and filter rods of cigarettes, which comprises the steps of preparation of internal standard extraction liquid, standard working solution and sample solution, gas chromatography-mass spectrometry, calculation of measurement results and the like. The measurement method, which is improved and optimized, has the advantages of simple and accurate operation, high sensitivity, high recovery rate, high repeatability and the like. The method of the invention has the advantages that: the quantityis fixed according to internal standards, so errors caused by pretreatment or the precision of instruments are reduced effectively; the adopted chromatographic conditions ensure high separation degrees and high linear correlation of both six target compounds and internal standard chromatographic peaks, and the detection limit is between 0.01 and 0.02mu g / g; and the sample recovery rate is between95 and 101 percent and the average relative standard deviation is between 4.1 and 5.0.

The invention discloses a domestication screening method and appliance of benzene series anaerobic degraded flora in polluted soil and water biological degraded disposing technical domain, which comprises the following steps: adding electron acceptor, sodium sulfide and BTEX mixture into polluted soil; sealing and stewing at three months; adding basic culture medium, trace metal liquid and vitamin C solution into anaerobic box filled with nitrogen; domesticating soil; switching domestication soil into anaerobic bottle with mass ratio of water and soil in the anaerobic box; adding into BTEX, electron acceptor and sodium sulfide with mass ratio; culturing 7-9 days in rotating oscillator with the temperature at 20+-2 deg.c; circling at least 9 times; getting the degraded flora. This invention can screen good anaerobic degraded property microbe flora, which can make degraded speed range of BTEX at 1.6-3.5mg.L-1.d-1.

The invention relates to subterranean treatment fluids, and more particularly for hydraulic fracturing formulations, comprising a low viscosity hydrocarbon fluid having low pour point and low or no BTEX content combined with suitable additives, in particular with a thickening agent additive.

The invented method used BTEX in sea-bottom shallow-layer sediment as geochemical mark of hydrocarbon reservoir, and utilizes the equipments of purging trapping apparatus, gas chromatograph with photo ionization detector and computer, etc. and adopts the techniques of sample pretreatment, separation, identification and high-sensibility measurement so as to predicate the deep hydrocarbon reservoir. Said invention also provides the working principle of said method and its concrete working steps.

The invention discloses a ptycene-perylene diimide derivative, a synthesis method thereof and sensing application to gas-phase volatile aromatic hydrocarbon. The ptycene-perylene diimide derivative has a special non-planar structure, so that a prepared sensing film has large specific surface area and porosity, and is rich in molecular channels, and good diffusion of molecules of an object to be detected in the film can be ensured; and meanwhile, by utilizing a capillary condensation phenomenon and the sensitive effect of fluorescent molecules on a surrounding environment in a high-excitation state, high sensitivity and high selectivity response to BTEX gas are realized, the response time and the recovery time are short, and a new thought is provided for gas-phase sensing of volatile organic compounds lacking photoelectric activity and preparation of a fluorescent sensing film with excellent performance. The preparation method is simple and convenient to operate and mild in reaction condition, the photochemistry stability and thermodynamic stability of a prepared fluorescent compound are good, and the obtained fluorescent sensing film is high in sensitivity, good in selectivity andlong in service life, and is an excellent fluorescent sensing film.

The invention discloses a method for processing alkene-containing exhaust gas. It is a combination of ozonic and biological processes which mainly deal with exhaust gas mixtures having alkene-containing (C-C double bond) organic exhaust gas (such as alkene, acrylic acid) and other volatile organic compounds (such as ketone, alcohol, BTEX, and others). Since exhaust gas containing C-C double bond is difficult to dispose of, the method for processing exhaust gas presented in the invention utilizes ozone to completely decompose or transform the organic contaminants with C-C double bonds into intermediate products. The organic contaminant can then be treated in the biological process and converted into non-toxic substances. This method does not require large-sized biological process equipment, and the residual ozone is oxidized and degraded in the bio-filter.

An off-gas flare system for disposing of a waste gas stream containing BTEX and VOC contaminants, and for safely handling slugs of excess liquids entrained in the waste gas stream. The flare system includes a flare stack, an enclosed steam tank disposed within the flare stack for receiving the waste gas stream and vaporizing any liquids in the waste gas stream into vapors, and an enclosed liquid tank disposed below the steam tank and in fluid communication with the steam tank for receiving the heated waste gas and liquid vapors and for temporarily containing any excess non-vaporized liquids. The flare also includes a waste gas burner disposed in the flare stack adjacent the steam tank and in fluid communication with the liquid tank, and a continuous means for igniting the waste gas burner.

An off-gas flare system for disposing of a waste gas stream containing BTEX and VOC contaminants, and for safely handling slugs of excess liquids entrained in the waste gas stream. The flare system includes a flare stack, an enclosed steam tank disposed within the flare stack for receiving the waste gas stream and vaporizing any liquids in the waste gas stream into vapors, and an enclosed liquid tank disposed below the steam tank and in fluid communication with the steam tank for receiving the heated waste gas and liquid vapors and for temporarily containing any excess non-vaporized liquids. The flare also includes a waste gas burner disposed in the flare stack adjacent the steam tank and in fluid communication with the liquid tank, and a continuous means for igniting the waste gas burner.

Volatile organic compounds (VOCs), such as BTEX methanol and other non-phase separable hydrocarbons may be removed from wastewater obtained from oil or gas exploration or production operations by way of a bioreactor. The bioreactor may employ anaerobic microorganisms that metabolize various VOCs. In some embodiments, such a bioreactor may be configured to treat process flow rates of thousands of barrels of wastewater per hour. Such a bioreactor may comprise a large vessel at a larger water treatment site.

The invention provides a method for treating benzene series in groundwater. In the method, the groundwater polluted by benzene series is firstly subjected to sand filtration pretreatment, and the SS of the effluent from the sand filter does not exceed 30mg through the filtering action of the quartz sand filter material. / L, then the water from the sand filter enters the ozone contact oxidation tank, under the catalysis of the catalyst, the ozone decomposes the aromatic compounds in the wastewater into small molecule aliphatic hydrocarbons, and finally reduces the COD content in the wastewater through the biodegradation of BAF, and at the same time The unique adsorption and filtration of BAF can effectively reduce SS and form a stable effluent quality. Beneficial results of the present invention: the method has high COD removal efficiency, ensures that the effluent COD index is stable below 80 mg / L, and meanwhile has low investment and operation costs.

This disclosure relates generally to processes sour gas treating for H2S Removal, separation of impurities such as hydrocarbons, BTEX and mercaptans and the Partial Acid Gas Enrichment integrated system from the sour gas field developments, or any application. The combination of innovation schemes comprises one or more absorbers, primary and secondary regenerators. The secondary regenerator functions are, enriching the H2S stream further and to separate the hydrocarbons, mercaptans and BTEX where an additional acid gas enrichment and hydrocarbons removal could be eliminated. Then there is a unique sulfur recovery and tail gas treating with a unique 2-zone reaction furnace, tail gas absorber which operated as partial acid gas enrichment by receiving split acid gas from the SRU and the hydrolysis reactor to hydrolyze sulfur compounds.The acid gas from the primary and the secondary amine regeneration and the acid gas recycle from the tail gas which is preheated and these streams flow to the 2-zones reaction furnace in the sulfur recovery unit to establish a stable low emission and higher recovery.

The present invention is directed toward a bioremediation product, its method of manufacture and method of use. A blend of microorganisms, cleansers and surfactants is disclosed which is non-toxic and solvent free, and which has the ability to accelerate the breaking down process of oils, materials such as benzene, toluene, and xylene (BTEX); petroleum hydrocarbon fractions F1-F4 (as defined by CCME2000), polycyclic aromatic hydrocarbons (PAH), paraffin waxes, volatile organics, molds, and the like; while simultaneously providing a biological component which is effective to reduce the total petroleum hydrocarbon levels to zero at an accelerated rate. The product is useful for bioremediation and as an oil dispersant composition useful in treating oil spills, and for cleanup of the shoreline, animals, plants, and equipment.

A method of remediating contaminated water is disclosed, for example groundwater, surface water and waste water, for example groundwater contaminated with dissolved and free product phase hydrocarbons, metals, e.g. chromium and other transition metals, uranium, soluble components of petroleum hydrocarbons (BTEX), perchlorates, and hexahydro-1, 3, 5- trinitro-1, 3, 5-triazine (RDX), and in particular chlorinated hydrocarbons. The method comprises treating the water with draff, for example a solid waste product of the fermentation process of barley during whisky manufacture. Apparatus for the same is also disclosed.

A chip-scale, reusable sensor can detect aromatic hydrocarbons, such as benzene, toluene, ethylbenzene, and xylenes (BTEX), rapidly in water without sample preparation. The device is capable of real-time, continuous monitoring for BTEX solutes, which diffuse into a film, such as a polymer, on the sensors surface. In operation, BTEX analytes concentrate in the film, causing an increase in refractive index, which modulates evanescent coupling into the chips integrated photodetector array. Integration of the photodetector array simplifies system instrumentation and permits incorporation of an on-chip photocurrent reference region in the immediate vicinity of the sensing region, reducing drift due to temperature fluctuations. In some examples, the chip responds linearly for BTEX concentrations between 1 ppm and 30 ppm, with a limit of detection of 359 ppb, 249 ppb, and 103 ppb for benzene, toluene, and xylene in water, respectively.

Methods for identifying hydrocarbon contamination sources may include fingerprinting hydrocarbons using isotopocule analyses for BTEX compounds. For example, methods for identifying hydrocarbon contamination sources may comprise: extracting BTEX compounds from a sample; measuring the isotopocule composition of the BTEX compounds; and determining a characteristic of the sample based on the isotopocule composition. Such characteristics may include, but are not limited to, the characteristic of the sample comprises one or more selected from the group consisting of: a source of the sample, a condition at which the sample formed or was last equilibrated, a migration time from a source to a sample location, weathering of the sample, and degree to which the sample is anthropogenic and naturally-occurring.

The invention relates to the field of biotechnology and environmental protection, in particular to a microbial inoculant, and particularly relates to a complex microbial inoculant for petroleum hydrocarbon and benzene series treatment as well as a preparation method and application thereof. The active ingredients of the complex microbial inoculant comprise aspergillus oryzae, streptomyces, pseudomonas putida, pseudomonas alcaligenes, brevibacterium epidermidis and Erwinia; and the complex microbial inoculant is especially suitable for treating soil polluted by petroleum hydrocarbon and benzeneseries. After the complex microbial inoculant disclosed by the invention is added into the soil polluted by the petroleum hydrocarbon and benzene series, indigenous degrading flora can be rapidly propagated, and the remediation process can be rapidly started; in the repairing process, the indigenous degrading bacteria are always in the dominant flora status, and high degradation efficiency is kept for a long time through the synergistic cooperation of the flora in the complex microbial inoculant; and finally, the polluted soil is completely repaired, the degradation rate of petroleum hydrocarbon and benzene series is high, and the removal rate of BTEX and TPH can reach 98% or above.

The current invention is an electrolysis remediation device and method that will act to saturate an area of influence with oxygen and / or hydrogen, which can easily be placed easily into a contaminated medium with minimum intrusiveness and power requirements. A variety of soil and groundwater contaminants are more readily broken down in an oxygen rich environment. Increasing the oxygen content of the soil and groundwater has been used to address a broad range of volatile and semivolatile contaminants including many of the contaminants associated with fuels, BTEX compounds and chlorinated solvents. Hydrogen is also widely recognized as a required key electron donor for the biologically mediated remediation of chlorinated compounds.

The deposition of organic materials originating from crude oil, such as asphaltenes and paraffins, is deemed to compromise satisfactory oil exploration and production, because it clogs pores and equipment, compromising the operation performance. This problem may arise at various points during the operations of drilling, stimulating, fracturing, completing and cementing wells, production, transportation, refining and storage of oil and derivatives, including the use of the fluid in treatments for oil wells and reservoirs, well tubing and annuli, tubing, equipment, and tanks used in treatment processes, transportation and refining of oil and derivatives thereof. The present invention relates to a solvent composition to solubilize such deposits and incrustations. The solvents used in the present invention have a high capacity to solubilize the molecules of asphaltenes and paraffins, forming sufficiently fluid and stable solutions, which allow the use of this composition for the removal of organic deposits in the oil industry. Due to its good performance in the solubilization of deposits and incrustations and, especially, due to the biodegradable nature and superior toxicological profile, the alternatives described in the present invention can replace compositions containing benzene, toluene, ethylbenzene, and xylene (products commonly denoted as “BTEX”), diesel, kerosene, or other solvents and complex formulations used in the oil industry.

The invention relates to a preparation method of a modified metal organic framework material for adsorbing and separating BTEX in C8 aromatic hydrocarbon, the preparation method comprises the following steps: introducing a quaternary ammonium salt type cationic surface active agent into synthesis of the metal organic framework material, dissolving metal copper salt and trimesic acid ligand into an organic solvent, mixing, and carrying out ultrasonic treatment; and adding quaternary ammonium salt cationic surfactants with different molar ratios, reacting the obtained mixed solution in a hydrothermal environment, carrying out suction filtration on the obtained blue-green crystal, washing, and drying to obtain the modified metal organic framework material. The highest static saturation adsorption capacity of the metal organic framework material modified by the quaternary ammonium salt cationic surface active agent to p-xylene in C8 aromatic hydrocarbon can reach 456mg / g, the separation coefficient of para-position and ortho-position xylene isomers is higher than 10.0, the adsorption capacity and the separation selectivity are 1.5-2 times of those of most MOFs materials, and the metal organic framework material is an excellent material for replacing a commercial zeolite molecular sieve adsorbent.

The invention relates to a BTEX degrading bacterium, a screening method therefor and application of the BTEX degrading bacterium. The degrading bacterium belongs to beneficial bacilli, is called after Diaphorobacter sp. ED-3, is preserved in China Center for Type Culture Collection and has a preservation number of CCTCC NO. M 2021059. The screening method comprises the steps of taking and placing a contaminated soil sample in a closed serum bottle, and carrying out acclimatization, separation and purification, thereby obtaining the BTEX degrading bacterium. The bacterium ED-3 can completely degrade 100mg / L of ethylbenzene in 60h, metabolic accumulation of toxic intermediate products is absent, and no secondary pollutant is generated; and the bacterium can simultaneously degrade benzene, methylbenzene, o-xylene, m-xylene and p-xylene. The bacterium is a non-pathogenic bacterium and is stable in degradation effect; and the operating cost is relatively low, adverse impact on environments is low, and thus, the degrading bacterium has very good development and utilization prospects.

The invention discloses a screening method of benzene pollutant BTEX degrading bacteria. The screening method comprises the following steps: collecting a bacterial source; adding bacterial source soil into a conical bottle with sterile water, shaking, and standing; smearing supernatant onto a primary screened culture medium flat plate to be cultured; selecting cultured rusty red oxidized sphere bacterial colony, and concentrating and culturing the bacterial colony in a liquid culture medium; smearing a culture solution on a secondary screened culture medium flat plate to be cultured; scribing and purifying the cultured transparent halo bacterial colony; and inoculating the purified bacterial colony onto an inclined surface of a strain preservation culture medium, and storing in a refrigerator for standby use. The screening method is high in screening efficiency and small in workload; the obtained degrading bacteria have high pertinence, have good degrading and removal effect for benzene pollutants in the soil, are used for restoring the soil polluted by the benzene pollutant BTEX, have the advantages of short restoration time, high restoration efficiency, low restoration cost, environmental friendliness, no pollution and the like, and is worth of popularization.

The invention relates to a divalent metal-base MIL-53 microporous material, and a preparation method and application thereof. The chemical composition of the microporous material is [Mn2(BDC)2(bpdo).(DMF)2]infinity, wherein, the BDC is terephthalic acid, the bpdo is 4,4'-bipyridine nitrogen oxide, and the DMF is N,N'-dimethylformamide. The preparation method of the microporous material comprises the following steps: S1, dissolving an Mn(NO3)2 solution, the terephthalic acid H2BDC and the bpdo in a solvent by mixing and stirring, carrying out heating for a reaction for 10-12 hours at a temperature of 120-150 DEG C in a closed environment, and carrying out cooling, filtering and drying; and S2, heating the reaction product obtained in the step S1 at an oil bath temperature of 150-160 DEG C under a vacuum condition for 6-8 hours to obtain the divalent metal-base MIL-53 microporous material. The microporous material provided by the invention is suitable for adsorbing a small amount or trace amount of benzene, toluene, ethylbenzene, and xylene (BTEX) residues in water and air in the environment. The preparation method provided by the invention is simple in steps, low in raw material cost and high in repeatability, and can be used to realize batch preparation.