57results about How to "Promote cleavage reaction" patented technology

The present invention discloses one kind of assistant for raising the yield of delayed coking liquid and its preparation process and application. The assistant consists of alkyl nitrate 20-40 wt%, fatty alcohol 10-30 wt%, dimethyl polysiloxane 10-20 wt% and solvent for the rest. The present invention can raise the yield of delayed coking liquid and reduce the yield of coke obviously.

The invention discloses a liquid combustion-supporting sulfur-fixing coal additive and a using method of the additive; the liquid combustion-supporting sulfur-fixing coal additive comprises the following components in percentage by weight: 3-7.5% of KMnO4, 3-8% of Cu(NO3)2, 2-7.5% of Fe(NO3)3, 8-18% of Ca(NO3)2, 3.5-6% of Al(NO3)3, 8-18% of KNO3, 0.5-2.5% of NaVO3, and the balance of H2O. The liquid combustion-supporting sulfur-fixing coal additive provided by the invention uses water as a solvent and each component is at an ionic state, has relatively high reaction activity at a high temperature and has high combustion efficiency and an excellent sulfur fixing effect, and the sulfur fixing efficiency is more than 40%.

The invention relates to a method for preparing xylene by shape-selective disproportionation of toluene to mainly solve the technical problem that a lot of recycle hydrogen is discharged out of a reaction system after a reaction under the hydrogen-containing reaction condition and supplemental hydrogen is greatly consumed in the prior art. The method for preparing xylene by shape-selective disproportionation of toluene comprises the following steps: reaction materials toluene and recycle hydrogen pass through a feed-in and feed-out exchanger to be heated so as to form a mixed material I; the mixed material I is heated by a heating furnace and enters a reactor, a material II obtained after a reaction enters a feed-in and feed-out heat exchanger and is cooled, and the material II enters a gas-liquid separator to be separated after being cooled; a gas phase in the upper part of the gas-liquid separator enters a gas-phase circulatory system; the recycle gas phase is mixed with supplemental hydrogen, and the mixture is recycled to the reaction system after pressurization; and a liquid phase in the lower part of the gas-liquid separator enters a subsequent liquid-phase separation system. By the technical scheme, the above problem is solved well. The method can be applied in industrial production of a shape-selective disproportionation reaction of toluene.

The invention discloses a cracking furnace. The cracking furnace comprises a convection section, a radiation section communicated with the convection section, a quenching boiler and a steam drum, wherein the convection section is internally provided with a convection tube bundle communicated with a feed inlet of the cracking furnace; the steam drum is arranged on the top of the convection section;the top of the convection section is provided with a fan communicated with the cracking furnace; the radiation section is internally provided with a plurality of groups of radiation tube bundles; theradiation tube bundles comprise a plurality of radiation furnace tubes; the plurality of radiation furnace tubes are arranged along the peripheries of the radiation tube bundles at intervals; the radiation furnace tubes are communicated with the convection tube bundle; the bottom and sidewall of a hearth in the radiation section are separately provided with a plurality of combustors; and the outlet ends of the radiation furnace tubes are communicated with the quenching boiler. The cracking furnace provided by the invention is simple in structure; through improvement of the arrangement mode ofthe radiation furnace tubes, difficulties in arrangement of the radiation furnace tubes can be reduced, and reaction conditions in each group of radiation furnace tubes in the cracking furnace are maximally maintained same; and the cracking furnace has the advantage of a small occupied land area under the condition of same unit production capacity.

The invention discloses a waste plastic molten salt cracking device. The waste plastic molten salt cracking device comprises a cracking furnace, the first end of the cracking furnace is provided with a molten salt outlet, the second end of the cracking furnace is provided with a molten salt inlet, a rotor feeder with a sealing function is arranged on an upper wall of the cracking furnace, a distributor is arranged on the position, close to the feeder, of the cracking furnace, the distributor is connected with a molten salt pump through a salt conveying pipe, all branch pipes of the distributor penetrate through the cracking furnace, a molten salt spray pipe is installed at the lower end of each branch pipe, the cracking furnace is provided with a tapered molten salt settling pond, the highest position of the upper wall of the cracking furnace is provided with a cracking gas outlet, and the molten salt outlet is connected with a molten salt furnace through a pipeline; the molten salt furnace is connected with the molten salt pump, one part of molten salt is sent to the second end of the sealed cracking furnace by the molten salt pump through the salt conveying pipe, and the other part of the molten salt is sent into the distributor. Due to the fact that the distributor is arranged, the heat transfer surface area is increased, the structure of the waste plastic cracking device is simplified, and the cracking efficiency is improved.

The invention belongs to a petrochemical industry, and provides an ethylene cracking furnace which comprises a high-pressure drum, a convection section, a radiation section, a quenching boiler and a combustor. Single-pass radiation furnace pipes are arranged in the radiation section and comprise inlet section straight pipes and bending pipe connectors, each bending pipe connector comprises two S-shaped bending pipes and an inlet straight pipe positioned between the two S-shaped bending pipes, a plurality of radiation furnace pipes form a large group, a plurality of large groups are arranged inthe radiation section, all radiation furnace pipes in each large group are connected with a shared collecting tube through the bending pipe connectors, outlet section straight pipes of the radiationfurnace pipes in each large group are vertically arranged relative to the bottom of the combustor, the convection section is connected with the collecting tube through a crossover pipe, and the crossover pipe is of a stereoscopic II-type structure distributed along the length, width and height directions of a furnace body of the radiation section. A distributed mode of the crossover pipe can ensure that a line of the crossover pipe has sufficient flexibility to absorb thermal expansion of the furnace pipes, so that bending of the furnace pipes is avoided.

The invention discloses a catalytic treatment process and system for converting hazardous waste oil-containing silt into solid waste. The treatment process comprises the following steps: S1, carrying out ultrasonic and crushing uniform mixing pretreatment on mixed raw materials of oil-containing silt and carbonaceous organic matter in a preparation tank; S2, putting a mixed material obtained after pretreatment and a surfactant with demulsification and viscosity reduction functions into a reaction tank, and carrying out heating and pressurizing treatment; and S3, collecting the mixed gas generated in the reaction tank. According to the catalytic treatment process for the oil-containing silt, a low-temperature hydrothermal carbonization pyrolysis and surfactant combined method is adopted, the oil-containing silt and a carbon-containing organic matter are used as main raw materials, and the oil-containing silt is subjected to structural transformation, activation and promotion of a cracking reaction with relatively high activation energy through physical, chemical and engineering means; and the oil content of the oil-containing silt can be efficiently reduced, so that the treated oil silt reaches the national harmless emission standard, and zero emission of the whole production process is realized.

The invention discloses a combustion-supporting coal additive and an application method thereof. The coal additive comprises the following components in percentage by weight: 3-7.5% of KMnO4, 3-8% of Cu(NO3)2, 2-7.5% of Fe(NO3)3, 1.5-6% of Zn(NO3)2, 6-14% of KNO3, 5-10% of NaNO3, 0.5-1.5% of NaVO3 and the balance of H2O. The combustion-supporting coal additive disclosed by the invention uses water as a solvent, and the components are in an ionic state, so the combustion-supporting coal additive has high reaction activity; the combination of the components in the additive can promote the decarburization and cracking reactions of the coal as well as the sufficient combustion of volatile compounds and fixed carbon, enhance the combustion efficiency of the coal, and save the coal by 4-10%.

The invention provides an ethylene cracking furnace of a double-section heat supply structure. The ethylene cracking furnace comprises a radiation section (1), a convection section (5), a radiation coiled tube (4), a quenching boiler (6), a high-pressure steam pocket (7) and a draft fan (8), wherein the quenching boiler (6) is connected with the radiation coiled tube (4); the draft fan (8) is connected with the top of the convection section (5); and the high-pressure steam pocket (7) is connected with the quenching boiler (6). The ethylene cracking furnace is of the double-section combined heat supply structure that the radiation section (1) is internally provided with an upper heat supply section and a lower heat supply section. By adopting the ethylene cracking furnace of the double-section heat supply structure, the arrangement of a combustor and the design of a combustion tube line arrangement are simplified, the flame inside a hearth is prevented from coiling to touch furnace tubes, interference of flame is also prevented, uniform distribution of heat in the height direction inside the hearth in the radiation section is maintained, and meanwhile the emission of NOx is reduced.

The invention relates to vacuumizing equipment for polyethylene wax powder. Thevacuumizing equipmentcomprises a working cabinet and a reaction kettle, wherein the reaction kettle is fixed at the upper end of the working cabinet, and is suitable for storing materials, the working cabinet is hollow, a vacuum device is fixed in the working cabinet, and is communicated with the reaction kettle, a control platform is arranged on one side of the working cabinet, and the control platform can control the vacuum device to pump away air in the reaction kettle. According to the present invention, the structure is simple, the vacuum device communicated with the reaction kettle is arranged in the work cabinet, the vacuum device can pump away the air in the reaction kettle so as to form the negative pressure in the reaction kettle, and the negative pressure in the reaction kettle can easily increase the cracking reaction of the material in the reaction kettle, such that the reaction time is substantially reduced, the production efficiency is improved, and the energy consumption is reduced.

The invention discloses an oleic acid modified magnetorheological fluid recycling-treating method, belonging to the field of magnetic waste fluid recycling and treatment. A recycling-treating agent used by the method comprises the following components by mass percent: 2-4% of dodecanol polyoxyethylene ether, 35-45% of sodium hypochlorite, 2-4% of dichloro[(1,2,5,6-eta)-cycloocta-1,5-diene]ruthenium and residual water. According to the method disclosed by the invention, by employing the sodium hypochlorite to remove oleic acid via oxidative cracking in the magnetorheological fluid, the surfactant is lost in the magnetorheological fluid, and the cohesive action between main dispersed particles and carrier fluid in the magnetorheological fluid is eliminated; and thus, the main dispersed particles can be quickly settled under the action of its own gravity, and the main dispersed particles and the carrier fluid are separated, thereby providing a foundation for subsequent recycling of the magnetorheological fluid. The method has the advantages of being simple in components, easy in preparation and low in cost, and simultaneously being simple in reaction conditions and good in treatment effect when the magnetorheological fluid is treated.

The suppression of coke adherence in a reaction vessel and cracked gas pipelines at the outlet of the reaction vessel and the prevention of plugging are designed by improving the dispersion of superheated steam inside the reaction vessel to preferable conditions, and pitch having more uniform and higher quality can be produced.A cracking process in which superheated steam is directly contacted with the heavy petroleum oil by blowing the superheated steam into the reaction vessel to be thermally cracked to oil fractions and pitch, wherein the superheated steam is blown into the reaction vessel from the bottom portion thereof so that the superheated steam generates rotational flow around the central axis of the shell of the reaction vessel.

The invention discloses a liquid combustion-supporting sulfur-fixing coal additive and a using method of the additive; the liquid combustion-supporting sulfur-fixing coal additive comprises the following components in percentage by weight: 3-7.5% of KMnO4, 3-8% of Cu(NO3)2, 2-7.5% of Fe(NO3)3, 8-18% of Ca(NO3)2, 3.5-6% of Al(NO3)3, 8-18% of KNO3, 0.5-2.5% of NaVO3, and the balance of H2O. The liquid combustion-supporting sulfur-fixing coal additive provided by the invention uses water as a solvent and each component is at an ionic state, has relatively high reaction activity at a high temperature and has high combustion efficiency and an excellent sulfur fixing effect, and the sulfur fixing efficiency is more than 40%.

The invention relates to a method for preparing fluorinated alkene by high temperature wet-cracking, belonging to the field of organic synthesis. The method is characterized in that under the condition of normal pressure and the temperature of 600-1000DEG C, hydrogen fluoride alkane with the molecular formula of HnFmC3 (n +m=8, n is more than or equal to 1 and less than or equal to 8, and m is more than or equal to 2 and less than 8) is taken as raw gas to have cracking reaction in the environment of water vapor or ammonia water vapor; no catalyst is used in the method, so that the generation cost is reduced, by-products are few, the selectivity of the product is high, subsequent purification and separation are convenient, the whole technique is easy to control, and the method is very suitable for producing the fluorinated alkene in industrialization-scale.

The invention belongs to the field of the biological energy utilization, and provides a device and a method for preparing oil by co-catalytically pyrolyzing forestry and agricultural wastes and algae in a sectional manner. The method comprises the following steps: mixing algae powder and forestry and agricultural waste powder to form a raw material, soaking HZSM-5 powder in a precursor solution containing gallium, and then soaking in a precursor salt solution containing nickel or silicon to obtain a composite catalyst; enabling carrier gas to enter from top of a heating section I; conveying the raw material to the heating section I by virtue of a spiral conveyor, enabling a non-condensed gas to rise to a projection section of the heating section I, placing the catalyst on a catalyst cushion layer of the projection section, after the pyrolysis is finished, turning an insert plate for 180 degrees, enabling the low-temperature product to fall into a heating section II, and enabling the carrier gas to enter from the bottom of the heating section II. A projection section at an outlet of the heating section II is provided with a cushion layer of self-made composite catalyst. The reaction residual coke is collected into a collection tank by virtue of an overturning stainless steel carrier net, and volatile components are collected into a liquid collector after being condensed. The low-oxygen high-quality biological oil is generated by utilizing the process, so that the conversion efficiency can be increased, and the carbon deposit deactivation of a molecular sieve can be effectively reduced.