2288 results about "Carbon deposit" patented technology

Methods for cleaning semiconductor processing chambers used to process carbon-containing films, such as amorphous carbon films, barrier films comprising silicon and carbon, and low dielectric constant films including silicon, oxygen, and carbon are provided. The methods include using a remote plasma source to generate reactive species that clean interior surfaces of a processing chamber in the absence of RF power in the chamber. The reactive species are generated from an oxygen-containing gas, such as O₂, and/or a halogen-containing gas, such as NF₃. An oxygen-based ashing process may also be used to remove carbon deposits from the interior surfaces of the chamber before the chamber is exposed to the reactive species from the remote plasma source.

The invention discloses a low-carbon alkane dehydrogenation catalyst and a preparation method thereof. The catalyst is prepared from chromium serving as an active metal ingredient, alkali metal serving as an auxiliary catalytic ingredient and chromium-containing aluminum oxide serving as a carrier, wherein the weight content of the chromium oxide in the carrier is 2.0 to 15.0 percent. In the method, the active metal ingredient, namely chromium, is introduced into the aluminum oxide carrier by partially using a kneading method and partially using an immersion method; pseudo-boehmite mixed with chromium is processed by adopting a three-step roasting method and a hydrothermal method; and thus, the porous structure and the surface character of the carrier can be improved, the content and the distribution of the active metal chromium in the carrier and the mutual effect between the active metal and the aluminum oxide are further modulated, the activity and the stability of the catalyst are improved, the carbon depositing resistance of the catalyst is enhanced, and the service life of the catalyst is prolonged.

A hdyrocatalyst for removing metals from residual oil is composed of a macroreticular aluminium carrier and the Mo and/or W and Co and/or Ni, which are carried by said carrier. It features that said carrier contains aluminium oxide (95-99 wt%) and halogen (1-5) and has lower acidity, resulting in high demetallizing activity and low carbon deposit.

A combination writing pen and stylus is disclosed. The device has an internal ink cartridge deployable through a hole in the stylus tip. The stylus tip extends from a sleeve that is formed of a conductive elastomeric material. The sleeve extends up a rigid shaft of the device such that it contacts a sufficient ground. The stylus tip may be coated with a protective material that adjusts the coefficient of friction and prevents carbon deposits on the touch screen. A sufficient contact patch is achieved to simulate a human finger so as to overcome false positives from common touch screen logic. This is done by altering tip geometries around an air cavity within the sleeve.

The invention relates to a catalyst for preparing low-carbon alkenes by low-carbon alkane dehydrogenation and a preparation method thereof. The invention mainly solves the problems of high inactivation tendency of carbon deposit and poor stability of the catalyst in the high-temperature service process in the prior art. The technical scheme is as follows: metal tin and other transition metal assistants are introduced into the supporter in the alumina supporter precursor kneading process, and extruded to form the composite metal oxide supporter; and an impregnation method is utilized to support the platinum compound, i.e. a platinum-impregnated soluble salt water solution is roasted by drying and treated with steam to obtain the platinum-tin catalyst. The technical scheme well solves the problems, and can be used in industrial production of the catalyst for preparing low-carbon alkenes by low-carbon alkane dehydrogenation.

The invention relates to a method for preparing alcohols by selectively hydrogenating aldehydes, belonging to hydrogenation technologies. In order to meet the requirements of people on two aspects, i.e. the improving of the selectivity on preparing the alcohols by hydrogenating the aldehydes and the prolonging of the service life of a catalyst currently, the method proposes that: the aldehydes are taken as raw materials; the reaction temperature is 20-300 DEG C; the reaction pressure is 0.1-7.0 MPa; the weight space velocity of the aldehydes is 0.02-20 h<-1>; the aldehydes and hydrogen gas are in contact with a hydrogenation catalyst; and the aldehydes are produced into corresponding alcohols through selectively hydrogenating. In the method, the hydrogenation catalyst comprises a carrier, a metal active component and silane groups; the silane groups are grafted through a silylanizing treatment; and the content of the silane groups in the total weight of the catalyst is 0.05 wt% to 25 wt%. Compared with the existing method, with the adoption of the catalyst in the method provided by the invention, the selectivity is high, the amount of byproducts, such as ethers, esters and acetals is greatly lowered; and meanwhile, the generation amount of carbon deposit is little, so that the catalyst has longer service life.

Disclosed are a method for preparing a complex oxide particle composition, the so-prepared particle composition and its use as electrode material. This composition comprises complex oxide particles having a non powdery conductive carbon deposit on at least part of their surface. Its method of preparation comprises nanogrinding complex oxide particles or particles of complex oxide precursors, wherein an organic carbon precursor is added to the oxide particles or oxide precursor particles before, during or after nanogrinding, and pyrolysing the mixture thus obtained; a stabilizing agent is optionally added to the oxide particles or oxide precursor particles before, during or after nanogrinding; and the nanogrinding step is performed in a bead mill on particles dispersed in a carrier solvent.

The invention relates to the technical field of engine cleaning agents, and particularly relates to an engine carbon deposition cleaning agent. The engine carbon deposition cleaning agent is composed of the following components in parts by weight: 5-20 parts of surfactant, 5-10 parts of penetrant, 5-15 parts of dispersant, 5-20 parts of emulsifier and 35-80 parts of organic solvent. The cleaning agent has the advantages of high cleaning efficiency, high safety and practicability, environment friendliness and the like.

The invention discloses energy-efficient long-life gasoline engine oil prepared from the following components: synthetic base oil, a composite antioxygen, a metal cleaning agent, an ashless dispersant, a nano-level friction improver, a viscosity improver and a pour point reducer. The gasoline engine oil provided by the invention has the following advantages: requirements of API SM, ILSAC GF-4 and SAEJ300 are met and the service life is long; the complete synthetic base oil features low pour point, high viscosity index, good economy of fuel, degradability and reduced harm to the ecological environment; the phenol type antioxygen is combined with ZDDP, the anti-oxygen and antifriction properties are good and the catalyst poisoning in a tail gas processing unit is prevented; the acid neutralization capacity is good, the cleaning dispersibility is good and the oil sludge and carbon deposit are prevented from being generated; and the nano-level friction improver is added, the frictional factor is low, and the oil film features high carrying capacity and can automatically repair abraded surface and lengthen the service life of the engine.

A catalyst for lightening the heavy arylhydrocarbon contains the metal in VIII family and composite carrier including ZSM-5 zeolite, mordenite and alumina. It can increase the transform rate of C9 aryhydrocarbon and output rate of xylene, and decrease the carbon deposit.

The invention relates to a starting method for a reaction-regeneration device which uses methanol to prepare low-carbon olefin, mainly comprising the following steps: a. using an auxiliary combustion chamber to heat air, and then entering the reaction-regeneration device; heating the dense phase temperature of a regenerator to 400-600 DEG C, and heating the temperature of a reactor reaction zone to 150-350 DEG C; b. switching the catalyst from a catalyst storage tank into the regenerator, and injecting the combustion oil to maintain the temperature of the regenerator; c. switching the catalyst from the regenerator into the reactor, and establishing reaction catalyst circulation between the reactor and the regenerator; d. heating the reactor reaction zone to a temperature not less than 350 DEG C, and putting the raw materials containing the methanol in the reactor to contact with the catalyst so as to generate the products containing low-carbon olefin and also form a carbon deposit on the catalyst; e. stop injecting combustion oil to the regenerator; f. stop using the auxiliary combustion chamber. The method has short starting period and light catalyst damage degree, which can be used for low-carbon olefin industrial production.

The invention discloses a deposited carbon cleaning agent for an internal-combustion engine, which relates to an environmentally-friendly, safe and resource saving carbon deposit cleaning agent and comprises the following matters: 5 to 16 weight percent of polyoxyethylene ether surfactant, 5 to 10 weight percent of emulsifier, 0 to 5 weight percent of inorganic alkali, 0 to 4 weight percent of corrosion inhibitor and 65 to 90 weight percent of water. In the invention, the polyoxyethylene ether surfactant is used to soften the deposited carbon to make the attached deposited carbon loose and deformed; the emulsifier makes liquid penetrate the contact parts between the deposited carbon and parts easily, so that the deposited carbon can be stripped and the softening and cleaning effects of the product on the deposited carbon stains are improved; the inorganic alkali can decompose part of lipoid substance in the deposited carbon, so the cleaning effect is improved; and the corrosion inhibitor can reduce the corrosion of the parts in the cleaning process. The cleaning agent has excellent washing effect on deposited carbon on parts made of various materials. The cleaning agent uses water as a solvent instead of toxic solvent such as benzenes, phenol aromatic hydrocarbons and halogenated hydrocarbon. The prepared deposited carbon cleaning agent for the internal-combustion engine has the advantages of low cost, high detergency, quick deposited carbon removal and good effect.

The invention relates to a fluidized bed reaction method for preparing para-xylene and coproducing low-carbon olefin with high selectivity by reacting toluene and a methylated reagent. The method adopts fluidized bed reaction technology and uses a catalyst to highly selectively produce the para-xylene and simultaneously highly selectively coproduce ethylene and propylene. The method is characterized in that the raw materials, namely the toluene and the methylated reagent enter a vaporizer for mixing and gasification, pass through a distribution plate, enter a fluidized bed reactor, and are taken as a fluidizing medium and subjected to catalysis with a fluidized catalyst; and gaseous mixture products after reaction are exhausted from the top of a tower and separated. The selectivity of the para-xylene in products in a xylene isomer is more than 99 weight percent, and the selectivity of the ethylene and the propylene in low-carbon hydrocarbon between C1 and C5 is more than 90 weight percent. The carbon deposit catalyst in the reactor continuously enters a regenerator for regeneration and activation and enters the reactor for recycling, can be continuously regenerated and has stable activity; and the method has simple technological flow and is easy to realize large-scale industrialization.

The invention discloses a reduction method for an iron-based catalyst for Fischer-Tropsch synthesis in a fixed bed. The method comprises the following steps: adding the iron-based catalyst into a fixed bed reactor; and introducing gaseous hydrocarbon or mixed gas of hydrogen and gaseous hydrocarbon into the fixed bed reactor for reduction reaction to reduce the iron-based catalyst. The reduction method has the advantages that (1) the reduced catalyst has a little carbon deposit, so the catalyst has high activity and stability; (2) the product selectivity of the catalyst can be effectively modulated, and the selectivity for C5-30 in products is high; and (3) the reduced catalyst has a little carburization, so the catalyst has high wear resistance.

A catalytic conversion method for improving the yield of low-carbon olefin comprises the following steps: hydrocarbon oil raw material is injected into a riser or/and a fluidized bed reactor via a feed nozzle, comes into contact with catalyst containing shape-selective zeolite with an average pore size being smaller than 0.7 nm and reacts; gas rich in hydrogen is injected into the reactor; reaction oil gas and carbon deposited catalyst after reaction are separated, wherein the reaction oil gas is separated to obtain a target product containing ethylene and propylene; and the carbon deposited catalyst is returned to the reaction for reutilization after being stripped and regenerated. By injecting gas rich in hydrogen, the method can remarkably inhibit reconversion reaction of the generated low-carbon olefin to improve the yield of low-carbon olefin, particularly of propylene. When vacuum gas oil is adopted as raw material and double risers combined with a fluidized bed reactor are adopted, ethylene yield reaches 8.97 wt%, and propylene yield reaches 31.38 wt%, which are respectively improved by 2.93% and 6.81% in comparison with a process without injection of gas rich in hydrogen.

The invention discloses a carbon deposit amount calculation method of a diesel engine particulate filter. The method comprises following steps: the running state of an engine is judged, and when the engine is in the passive regeneration state, the Soot mass flow consumed by passive regeneration is calculated; the Soot mass flow consumed by initiative regeneration is calculated, and the Soot mass flow totally consumed by regeneration is obtained; the non-reaction Soot mass flow is calculated, according to judgment of the different running states of a DPF engine and the running state, the different integral initial values are selected, the non-reaction Soot mass flow is subject to integral operation, and the current DPF carbon deposit amount is obtained; the work state of an aftertreatment system is represented through exhaust substance components and exhaust physical parameters, and therefore the DPF carbon deposit amount is identified, and the identification result is more precise.

A combined catalytic converting process for preparing low-carbon olefin with high output includes such steps as contacting between heavy oil as raw material, regenerated catalyst and carbon deposited catalyst in flow-down tube reactor, cracking reaction, separating the cracked product from the catalyst to be regenerated, separating low-carbon olefin from cracked product, contacting between rest of said product and regenerated catalyst in flow-up tube reactor, reaction, separating oil gas from catalyst, separating low-carbon olefin from oil gas, and regenerating the catalyst.

The present invention relates to a method used for improving the yield of light olefins and mainly solves the problem of the low yield of the products when oxygen-containing compounds are used for preparing the light olefins. In the technical proposal, two reactors are used; zeolite catalysts with carbon deposit are prepared in the first reactor; the regenerated catalysts are optimized again in the second reactor; thus the problem can be well solved. The method can be used for the industrial production of the light olefins.

The invention relates to ultra quick quenching oil and a preparation method thereof. The ultra quick quenching oil comprises the following raw materials in percentage by weight: 80 to 97 percent of refined mineral oil, 1 to 10 percent of cooling catalyst, 1 to 5 percent of antioxidant and 1 to 6 percent of anionic surfactant. The kinematic viscosity of the refined mineral oil at the temperature of 40 DEG C is 6 to 9 mm<2>/s; the cooling catalyst is a mixture of oily phenolic resin and polybutylene; the antioxidant is alkylated diphenylamine; and the anionic surfactant is petroleum sodium sulfonate. The preparation method of the ultra quick quenching oil is simple and convenient; the obtained quenching oil has the advantages of ultra high cooling speed, good thermal oxidation stability, long service life and continuous and stable property retention; little peculiar smell, smog and carbon deposit are produced, and the take-out consumption of a workpiece is low; and after the workpiece is quenched by adopting the quenching oil, the workpiece has the advantages of high and uniform surface hardness, deep quenching layer, low deformation, metallographic structure, good mechanical property and good brightness, the surface of the workpiece does not become black, and the workpiece is easily cleaned.

A filtration system adapted to prevent diesel soot carried with recirculated exhaust gas from being recirculated through internal combustion engine. The filtration system provides continuous elimination of soot, thus reducing its negative impact on engine life, lubrication oil quality, and on components in the exhaust gas recirculation system. The filtration system comprises a non-thermal plasma generator that periodically, or continuously, oxidizes carbon deposited, or trapped, within a carbon filter disposed downstream of the non-thermal plasma generator.

A modified alumina catalyst for preparing dimethylether by dewatering methanol is prepard by adding sulfate to ordinary gamma-Al2O3. Its advantages are high transform rate and selectivity at lower temp and no carbon deposit at higher temp.

A catalyst for preparing low-carbon alcohol mixture from synthetic gas contains Mo (2-40 %), Ni (4-10%), Mn (0.1-5.0%), K (5-15%), S (20-40%) and bentone, and is prepared through reaction of ammoniumsulfide solution or hydrogen sulfide gas on ammonium molybdate, adding concentrated acetic acid, thermal stirring, cooling for deposition, adding deionized water for dissolving doposit to obtain solution of ammonium thiomolybdate, dropping the solution along with the mixed solution of nickel acetate and manganese acetate in acetic acid to form black deposit, filtering, washing, baking, mixing with bentone, and tabletting. Its advantages are high resistance to S and no carbon deposit.

A cathode material for a secondary battery containing a cathode active material represented by the general formula Li_nFePO₄ (wherein n represents a number from 0 to 1) as a primary component and molybdenum (Mo), wherein the cathode active material Li_nFePO₄ is composited with the Mo. In a preferred embodiment, the cathode material has conductive carbon deposited on the surface thereof.