3254 results about "Alkane" patented technology

A pyrolysis method and system are provided that enhances the production of C3 and C4 alkanes in the resulting pyrolysis effluent. More particularly, the disclosed pyrolysis method and system may be configured to enhance the production of C3 and C4 alkanes due to the use of certain pyrolysis catalysts and more intense pyrolysis conditions.

The invention discloses a single-ion conductor polymer, a ternary composite binder solution, high-solid-content sulfide electrolyte slurry and a wet film forming method and application thereof, and belongs to the technical field of all-solid-state lithium batteries. The key technical problems in the wet membrane preparation of the sulfide electrolyte are solved through an innovative solvent-binder synergistic system, and the method specifically comprises the steps that 1, through the synergistic effect of a non-polar solvent and a weak-polar solvent, low-viscosity coating of high-solid-content slurry is achieved while the chemical stability of the sulfide electrolyte is guaranteed; 2, a poly (lithium styrenesulfonate-butyl acrylate), styrene butadiene rubber and polyisobutene ternary composite binder is designed, a lithium ion transmission channel is provided through a lithium sulfonate group, a benzene ring structure in the styrene butadiene rubber enhances the mechanical strength, long-chain alkane in the polyisobutene improves the interface adhesive force, and the mechanical strength is improved; the three components cooperate to realize balance of mechanical and electrochemical properties of the electrolyte membrane, so that the prepared electrolyte membrane has low porosity, high ionic conductivity and mechanical strength.

The preparation method comprises the following steps: by taking 2, 2 '-[4-(4-aminophenylazo) phenylimine] diethanol and phenol as raw materials, preparing a bisazobenzene compound according to a molar ratio of 1: 1, carrying out nucleophilic substitution on the compound and alkyl bromide according to a molar ratio of 1: 1 to prepare a bisazobenzene monomer, and carrying out side-chain type photoresponse bisazobenzene polyurethane on the bisazobenzene monomer to prepare the side-chain type photoresponse bisazobenzene polyurethane. And carrying out a reaction on the bisazobenzene monomer and diisocyanate urethane to obtain the side chain type photoresponse bisazobenzene polyurethane. The bis-azobenzene polyurethane has obvious trans-cis configuration change along with the increase of ultraviolet irradiation time in a tetrahydrofuran solution, and gradually recovers the trans configuration under the irradiation of visible light. Besides, the bisazobenzene polyurethane and polyurethane are subjected to melt blending to prepare a composite material film, and the composite material film has an obvious light-induced bending phenomenon under ultraviolet irradiation.

The invention provides a preparation method of a waterproof flame-retardant multifunctional fabric, and belongs to the technical field of functional textiles. The preparation method comprises the following steps: heating dihydric alcohol until the dihydric alcohol is completely melted, adding diisocyanate, a flame retardant and a catalyst, reacting to obtain a polyurethane prepolymer, adding a chain extender for chain extension, then adding an end-capping reagent for end capping, cooling, adding an emulsifier to obtain a waterproof flame retardant emulsion, adding water to form a finishing agent, soaking a polyacrylonitrile pre-oxidized fiber fabric in the finishing agent for treatment, and drying to obtain the waterproof flame retardant fabric. And pre-drying and baking to obtain the multifunctional fabric. Polyhydric alcohol with a long alkane chain is adopted to carry out chain extension on a polyurethane prepolymer, the obtained waterproof agent has good film-forming property, can be firmly fixed on the surface of a fiber without the help of a cross-linking agent or an adhesive during application, and endows a modified textile with excellent washing fastness.

The invention relates to the technical field of lithium battery negative electrode materials, and particularly discloses a resin-based self-activated porous carbon material and a preparation method and application thereof.The preparation method comprises the following steps that a diphenol monomer, a diphenol monomer containing thioether bonds, formaldehyde or polyaldehyde and a catalyst A are subjected to a condensation polymerization reaction, and phenolic resin is obtained; and carbonizing the phenolic resin to obtain the resin-based self-activated porous carbon material. The phenolic resin is synthesized by utilizing the diphenol monomer containing the thioether bond, so that a thioether alkane side chain is introduced into the phenolic resin, and in the carbonization process of the phenolic resin, because the thioether bond is extremely easy to decompose at high temperature to generate gas, a phenolic resin framework can be subjected to pore forming; the prepared resin-based self-activated porous carbon material has high specific surface area and pore volume, controllable design of the internal pore structure of the resin-based porous carbon can be realized by controlling the structure and modification proportion of the thioether alkane side chain, and ideal pore distribution is obtained.

A light hydrocarbon aromatization catalyst capable of increasing the yield of light alkane comprises a hydrogen type Silicalite-1 (at) ZSM-5 core-shell molecular sieve, an active metal and / or a binder, the hydrogen type Silicalite-1 (at) ZSM-5 core-shell molecular sieve takes a Silicalite-1 molecular sieve as a core layer and a ZSM-5 molecular sieve as a shell layer, and the particle size of the hydrogen type Silicalite-1 (at) ZSM-5 core-shell molecular sieve is 90-140 nm. The catalyst is applied to light hydrocarbon aromatization reaction, has higher low-carbon alkane yield and lower dry gas yield, and is good in stability, long in one-way reaction period and low in carbon deposit amount.

The invention discloses erianin PROTACs as well as a preparation method and application thereof, the structural formula of the erianin PROTACs is # imgabs0 #, E3 Ligand is pomalidomide, and Linker is an alkane chain or a PEG chain. The erianin PROTACs disclosed by the invention are superior to the prior art in the aspects of target protein degradation efficiency, anti-tumor activity, innovativeness, application prospect and the like, and show remarkable technical progress and practical value.

The invention discloses an ethylene-vinyl alcohol copolymer and a preparation method thereof, and relates to the technical field of resin. According to the technical scheme, the preparation method comprises the following steps: adding ethylene, low-carbon alkane, alkyl acid ethyl ester, alkyl acid vinyl ester and a carbon-carbon skeleton initiator into a reaction kettle, and carrying out a free radical polymerization reaction; adding a polymerization inhibitor to terminate the reaction, removing low-carbon alkane, unreacted ethylene and alkyl acid vinyl ester, and preparing the reaction liquid into an alcoholic solution; adding a catalyst into the alcohol solution for saponification reaction, and then performing acid pickling, water washing and drying to obtain the ethylene-vinyl alcohol copolymer. The low-carbon alkane which is low in boiling point, easy to vaporize and high in latent heat of vaporization and the saturated alkyl acid ethyl ester with good solubility are adopted as the mixed solvent to replace a traditional alcohol solvent, so that removal and control of reaction heat are facilitated, generation of insoluble gel is reduced, a copolymer with narrow molecular weight distribution is easy to obtain, and the method is suitable for industrial production. The cost that azeotrope formed by the alcohol solvent and the monomer is difficult to separate and recover is greatly reduced, and the production efficiency is improved.

The invention discloses a multi-amino absorbent for carbon dioxide capture and a method for capturing carbon dioxide from a gas mixture, and belongs to the technical field of gas separation and carbon capture, utilization and storage. The multi-amino absorbent at least comprises a first component and a second component, wherein the first component is at least one N-hydroxyalkyl-N '-hydroxyalkyl-alkane diamine; the second component is at least one organic amine different from the first component, and the organic amine contains amino groups which are not primary amino groups and does not contain steric hindrance amino groups; and a solvent and optionally an additive. The method for capturing carbon dioxide from a gas mixture includes contacting the polyamino absorbent with a gas mixture containing carbon dioxide, thereby capturing carbon dioxide. The polyamino absorbent disclosed by the invention has the advantages of low carbon dioxide absorption reaction heat in normal-pressure flue gas, high circulating absorption amount, high absorption rate, high desorption rate, low volatility and the like.

The invention provides a method for producing long-chain dicarboxylic acid and a long-chain dicarboxylic acid product. The method comprises the following steps: inoculating a seed solution of a fermentation strain into a fermentation tank, wherein a fermentation substrate comprises any one or more of fatty acid and derivatives thereof, and alkane; according to the method, green raw materials such as fatty acid and derivatives thereof, plant-based alkane and the like are adopted as substrates to partially or completely replace fossil energy such as petroleum alkane and the like, the product is green long-chain binary acid, and the bio-based content can be regulated and controlled. And the fermentation method provided by the invention can still maintain relatively high yield and conversion rate.

The invention belongs to the field of catalyst regeneration, and provides a regeneration method of a platinum-based low-carbon alkane dehydrogenation catalyst, which specifically comprises the following steps of: simultaneously carrying out charking and oxychlorination operations before a deactivated catalyst reaches the highest roasting temperature, and adding agent pouring treatment in the regeneration process, and measures for protecting the dispersity of platinum on the catalyst are added in the reaction heating process of the catalyst and after the application is finished, so that the service life of the catalyst is prolonged. According to the regeneration method, the regeneration step of the deactivated catalyst is simplified, chlorine injection, water injection, vulcanization and other operations are not needed, charking, oxychlorination and different reduction depths caused by different positions of the catalyst are avoided, the performance uniformity of the catalyst and the redispersity of platinum are improved, and the regeneration efficiency is improved. The problems that in an existing regeneration method, the dispersity of active components is low, the number of repeated regeneration times is small, and the performance of the catalyst is reduced are solved, the regenerated catalyst obtained through the regeneration method is not lower than that of a fresh catalyst in the aspects of catalyst conversion rate, selectivity and stability, and the regeneration effect is remarkable.

The invention belongs to the technical field of polyether polyol, and particularly relates to flame-retardant polyether polyol with a low heat conductivity coefficient as well as a preparation method and application of the flame-retardant polyether polyol. The flame-retardant polyether polyol with the low heat conductivity coefficient is obtained by polymerizing bis (2-hydroxyethyl) aminomethyl diethyl phosphonate, halogen-containing aniline and small molecular alcohol / alcohol amine as a ternary mixed initiator with alkylene oxide under the action of a catalyst, the ternary mixed initiator comprises the following components in percentage by mass: 12.15 to 22.78 percent of bis (2-hydroxyethyl) amino methyl diethyl phosphonate, 43.21 to 63.89 percent of halogen-containing aniline, and 23.96 to 34.01 percent of small molecular alcohol / alcohol amine. The polyether polyol realizes comprehensive properties of lasting flame retardance, high strength and low heat conductivity. The invention also provides a preparation method of the polyether polyol and application of the polyether polyol in rigid polyurethane foam.

A pyrolysis method and system are provided that enhances the production of alkanes and minimizes the production of aromatics in the resulting pyrolysis oil. More particularly, the disclosed pyrolysis method and system may be configured to enhance the production of alkanes due to the use of certain pyrolysis catalysts and more intense pyrolysis conditions.

The invention relates to the technical field of chemical production, in particular to a method and device for prolonging the service life of an active metal catalyst on line, and the method comprises the following steps: respectively carrying out activity recovery on the active metal catalyst by using an alkane solvent and a mixed gas containing H2, an ammonia-containing compound and an inert gas; the activity recovery comprises solvent circulation desolvation and hydrogen circulation cracking, and the solvent circulation desolvation comprises dissolution, internal circulation and / or external circulation; when gamma is more than gamma hydrogen and less than gamma solution, carrying out solvent circulation desolvation; when gamma is smaller than or equal to gamma hydrogen, hydrogen cycle cracking is carried out; when gamma is greater than or equal to gamma solution, reacting; gamma is the activity% of the catalyst at any stage; gamma hydrogen is a critical value for hydrogen cycle cracking, and gamma hydrogen is less than or equal to 60%; the gamma solution is a critical value of the solvent circulation desolvation, and the gamma solution is more than 60% and less than or equal to 80%. The method adopts a mode of combining solvent circulation desolvation and hydrogen circulation cracking, so that the activity of the catalyst is effectively improved, the service life is prolonged, and the number of times of unloading the catalyst is reduced.

The invention relates to the technical field of polyhydroxyalkanoate materials, and specifically discloses a marine degradable polyhydroxyalkanoate composition, a molded body and a preparation method thereof. The polyhydroxyalkanoate composition includes: (A): 38 to 89.5 parts of a polyhydroxyalkanoate; (B): 10 to 30 parts of an other fully biodegradable resin; (C): an additive, including: 0.1 to 0.5 parts of a chain extender, 0.1 to 1 parts of an antioxidant, and 0.1 to 1 part of a lubricant; (D): 0 to 30 parts of a filler. The molded body prepared from the composition provided by the present invention has high marine degradability and meets the marine biodegradation certification standard. In addition, the preparation method of the present invention can improve the processability and processing efficiency of the blended composition provided by the present invention.

The invention belongs to the technical field of petrochemical engineering, and particularly relates to a thermal auxiliary material for promoting alkane dehydrogenation reaction efficiency and a preparation method and application thereof. The auxiliary material is composed of a heating main body, a heat storage carrier, a stabilizing auxiliary agent and a carrier auxiliary agent. Wherein the component of the heating main body is CuO; the component of the heat storage carrier is CaO-Al2O3 composite oxide; the stabilizing auxiliary agent is one or more of Cr2O3, La2O3, CeO2 and ZrO2; and the carrier auxiliary agent is one or more of MgO, BaO, NiO and Fe2O3. The thermal auxiliary material with high mechanical strength, high heat transfer performance and high stability is synthesized through the steps of coprecipitation reaction, high-temperature hydrothermal reaction, high-temperature calcination, vacuum impregnation, ultrasonic oscillation and the like; when the material is applied to an alkane dehydrogenation olefin preparation device, alkane conversion rate and olefin selectivity can be improved, the service life of a catalyst can be prolonged, and energy consumption of the device can be reduced.

The invention provides a Pt-Sn bimetallic catalyst and a preparation method and application thereof.The preparation method comprises the steps that 1, a Y molecular sieve is placed in a mixed solution of KOH and methyl alcohol, centrifugation and washing are conducted till the Y molecular sieve is neutral after stirring, drying and roasting are conducted, and a non-acid KY molecular sieve is obtained; the silica-alumina ratio of the Y molecular sieve is 3-100; 2) taking the non-acidic KY molecular sieve as a carrier, and loading Sn by adopting an atomic layer deposition technology to obtain a Sn-modified non-acidic KY molecular sieve; and 3) loading Pt by using the Sn-modified non-acidic KY molecular sieve as a carrier and adopting an atomic layer deposition technology to obtain the Pt-Sn bimetallic catalyst. According to the preparation method provided by the invention, spatial distribution of Pt and Sn is accurately regulated and controlled by combining an atomic layer deposition technology, so that the electronic state of Pt species is adjusted, alkane is promoted to be dehydrogenated into an olefin intermediate, and the aromatization catalytic activity and the aromatic hydrocarbon selectivity of alkane are improved.

The invention discloses a high-strength modified polyethylene composite fiber and a preparation method thereof, and belongs to the technical field of fiber materials, carboxylated mesoporous silica microspheres are used as a matrix, the surface of the matrix is coated with a graphene sheet layer, then hydroxyethyl methylacrylate is grafted, functionalized graphene / mesoporous silica microspheres are obtained, the functionalized graphene / mesoporous silica microspheres are used as a filler, and the high-strength modified polyethylene composite fiber is prepared. When the polyethylene composite fiber is applied to a ship cable, the overall weight of the ship cable can be reduced, and relative slippage can be generated between graphene lamellas and mesoporous silica microspheres, so that stress is dispersed, and the strength of the polyethylene composite fiber is improved; a hydrophobic alkane long chain is introduced through esterification of the graphene / mesoporous silica microspheres and hydroxyethyl methylacrylate and graft modification of hydroxyethyl methylacrylate, so that the hydrophobic alkane long chain has good compatibility with white oil, and the microspheres are prevented from approaching and gathering by a steric hindrance effect, so that the hydrophobic alkane long chain is more uniformly and stably dispersed in the white oil.

The invention provides organic silicon cooling liquid and a preparation method thereof. The molecular structural formula of the organic silicon cooling liquid is shown in the specification, R1 is selected from C3-7alkane, the value of a is 0-12, and the value of b is 14-20. A phenyl group and a long-chain alkyl side chain are introduced into a silicone oil main chain through an organic synthesis means, the regularity of a polysiloxane chain is destroyed, the crystallization property of the polysiloxane chain is reduced, the performance of the organic silicon cooling liquid is changed from the molecular structure, and the organic silicon cooling liquid can still flow at a low temperature (-65 DEG C). In addition, by introducing phenyl, the flash point, irradiation resistance and other properties of the immersed cooling liquid can be remarkably improved. # imgabs0 #

The invention belongs to the technical field of catalysis, and discloses a high-density long-chain alkane dehydrogenation catalyst and a preparation method thereof. The invention relates to a high-density long-chain alkane dehydrogenation catalyst, which is a composition of Pt, Sn, Ni, Fe and alkali metal or oxide thereof loaded by using mesoporous and microporous alumina as a carrier. The catalyst is mainly applied to the reaction process of preparing monoolefine through dehydrogenation of long-chain n-alkanes (C10-C13), the catalyst uses a ball-forming high-density carrier, the preparation process is safer and more environment-friendly, the dehydrogenation service life of the catalyst is prolonged, and the dehydrogenation stability is improved by 15-30%.

The invention discloses a shape-selective isomerization catalyst as well as a preparation method and application thereof. The catalyst comprises a ten-membered ring aluminum phosphate molecular sieve, a noble metal active component and a metal oxide auxiliary active component. The ten-membered ring aluminum phosphate molecule is selected from at least one of SAPO-11, MeAPO-11, SAPO-41 and MeAPO-41, and the ten-membered ring aluminum phosphate molecule is selected from at least one of SAPO-11, the noble metal active component is selected from at least one of Pt and Pd; the metal oxide auxiliary agent is selected from at least one of CeO2, Nb2O5 and Ta2O5. Compared with the catalyst prepared in the prior art, the catalyst prepared by the method provided by the invention has higher activity and isomer yield in the isomerization reaction of long-chain n-alkanes.

The invention discloses a metal self-dispersed low-carbon alkane dehydrogenation catalyst as well as a preparation method and application thereof. The catalyst is composed of a molecular sieve carrier, metal particles of main active components Ru, Rh, Pd, Ir, Pt and Au, auxiliary components Fe, Co, Ni, Cu, Zn, Ga, In, Ge, Sn, Mn, Zr, V, Cr, Ti, Nb, Mo, Y, W, Pb, Sc, Bi, Sb, La and Ce, and alkali metal components Na, Mg, K, Ca and Cs. Firstly, the synthesized molecular sieve is subjected to high-temperature activation heat treatment, so that rich defect sites are generated; and mixing the activated molecular sieve with metal particles, and finally carrying out high-temperature treatment on the mixture in an oxygen atmosphere to prepare the stable molecular sieve loaded metal cluster. The obtained catalyst shows excellent catalytic activity and regeneration performance. The active metal particles are used as raw materials, the step of converting metal particle powder into salt is reduced, a physical mixing method is adopted, the preparation process of the catalyst is simpler, and the economic cost is lower.

The invention discloses a preparation method of a super-hydrophobic antibacterial fabric with a photothermal effect, which comprises the following steps: firstly, loading a photothermal preparation on the surface of the fabric to endow the fabric with photothermal performance, and then introducing a composite coating formed by hydrophobic silicon dioxide nanoparticles and a silane coupling agent with an alkane chain, the surface energy of the material is reduced, a micro-nano coarse structure is constructed, and the antibacterial fabric with excellent photo-thermal and super-hydrophobic properties is prepared; the surface water contact angle of the prepared super-hydrophobic antibacterial fabric is 158 degrees, the surface temperature reaches 120 DEG C under the irradiation of near-infrared light, and the super-hydrophobic antibacterial fabric shows excellent photo-thermal cycling stability and super-hydrophobic high-temperature resistance; the antibacterial rate of the super-hydrophobic antibacterial fabric exceeds 99.0% under the synergistic effect of passive super-hydrophobic antibacterial adhesion and active photo-thermal sterilization, and the super-hydrophobic antibacterial fabric is wide in antibacterial range and long in antibacterial life.

The invention belongs to the technical field of alkane processing, and particularly relates to a process for preparing isopentene by dehydrogenation of isopentane, a catalyst and a tert-amyl alcohol preparation process. The process for preparing isopentene by dehydrogenation of isopentane comprises an isopentane dehydrogenation device and an isopentene separation device, in the isopentane dehydrogenation device, a dehydrogenation reactor is a fixed bed adiabatic reactor and is filled with a Pt-Sn-K / alumina type alkane dehydrogenation catalyst, the catalyst has hydromethanation performance under the CO2-containing dehydrogenation reaction condition, and the arrangement and operation of a dehydrogenation reactor group comprise a mode A, a mode B or a mode C; the isopentene separation device comprises a cooling separation system, a pressure swing adsorption separation system and an optional rectification system. The tert-amyl alcohol is further prepared from isoamylene under the conditions of a fixed bed hydration reactor, ethylene glycol monobutyl ether and other solvents, and the tert-amyl alcohol product is obtained through separation. The process is superior to the prior art on the whole, and has certain application prospects.

This method for producing a halogenated alkene comprises converting a halogenated alkane which has 2-4 carbon atoms and contains a fluorine atom into a halogenated alkene which has 2-4 carbon atoms and contains a fluorine atom in a gas phase in the presence of silicon oxide and an alkali metal element.

The invention discloses a high-flexibility anti-cracking coating and a preparation method thereof, and belongs to the technical field of building coatings. The coating is prepared from the following components in parts by mass: 50 to 70 parts of acrylic acid-organic silicon copolymer elastic emulsion with a core-shell structure, 3 to 8 parts of nano cellulose and polyester staple fiber composite fiber reinforced system, 20 to 30 parts of modified mica powder and fumed silica functional filler with a high radius-thickness ratio, 5 to 10 parts of auxiliaries and 10 to 15 parts of deionized water. A core layer of the elastic emulsion is a butyl acrylate-styrene elastomer, a shell layer of the elastic emulsion is a methyl methacrylate-organosiloxane copolymer, and a coating is endowed with high elongation at break and low-temperature crack resistance through the synergistic effect of a flexible network of the core layer and a rigid-flexible gradient structure of the shell layer. The nano cellulose and the polyester staple fiber form a dual-scale reinforcing system, so that cracks are bridged, and stress is dispersed; and the modified mica powder and fumed silica are compounded to improve the compactness and wear resistance of the coating.

The method for producing a halogenated alkene converts a halogenated alkane having 2 to 4 carbon atoms and containing a fluorine atom into a halogenated alkene having 2 to 4 carbon atoms and containing a fluorine atom in the gas phase in the presence of silicon oxide and an alkali metal element.

The invention discloses a method for preparing a super-hydrophobic antibacterial fabric with a photothermal effect. The method first loads a photothermal preparation on the surface of the fabric to impart photothermal properties, and then introduces a composite coating formed by hydrophobic silica nanoparticles and a silane coupling agent with an alkane chain to reduce the surface energy of the material and construct a micro-nanoscale rough structure, thereby preparing an antibacterial fabric with excellent photothermal and super-hydrophobic properties. The super-hydrophobic antibacterial fabric prepared by the invention has a fabric surface water contact angle of 158° and a surface temperature of 120°C under near-infrared light irradiation, showing excellent photothermal cycle stability and super-hydrophobic high temperature resistance. The super-hydrophobic antibacterial fabric has an antibacterial rate of over 99.0% under the synergistic effect of passive super-hydrophobic antibacterial adhesion and active photothermal sterilization, and has a wide antibacterial range and a long antibacterial life.

The invention discloses a smelting furnace control system for rubber product processing, and relates to the technical field of rubber product production control. The main problems that in existing production, data support for active adjustment is lacked in temperature control of a rubber product kiln, and the optimal air-fuel ratio cannot be determined so that the combustion efficiency can be guaranteed, and meanwhile the content ratio of smoke components can be within a set interval can be solved. According to the method, the corresponding fuel gas change amount and the combustion-supporting air change amount are accurately calculated through the temperature difference between the actually measured temperature at the bottom of the pool and the temperature expected threshold value interval in combination with the volume fraction of each alkane component in the fuel gas and the kiln efficiency, so that data support is provided for adjustment and control, and energy waste is avoided; smoke components are analyzed through the smoke parameter feedback module, whether combustion air is insufficient or excessive is judged, the result is fed back to the fuel input control module to adjust the air-fuel ratio, the operation is repeated for multiple times, and accurate derivation of the optimal air-fuel ratio is achieved.

To provide a buff polishing emulsion composition and the like excellent in polishing and finishing properties.SOLUTION: The present invention is a buff polishing emulsion composition containing water, lubricating oil, an organic solvent, abrasive particles, and a surfactant, wherein the abrasive particles include tin(IV) oxide particles (A) with an average particle diameter of 1.2 to 1.6 μm and tin(IV) oxide particles (B) with an average particle diameter of 0.5 to 0.9 μm. The total content of tin(IV) oxide particles (A) and tin(IV) oxide particles (B) in the buff polishing emulsion composition is 5 to 10 wt.%, and the content ratio of tin(IV) oxide particles (A) to tin(IV) oxide particles (B) is 5:5 to 8:2 by weight. The organic solvent includes an isoparaffinic hydrocarbon.SELECTED DRAWING: None