681 results about "Butane" patented technology

The invention belongs to the field of drinking water treatment, and relates to a treatment system for preparing drinking water, which comprises a water inlet device, a filter screen device and an immersed flat sheet membrane filtering device which are arranged in sequence. The immersed flat sheet membrane filtering device comprises a membrane stack, the membrane stack comprises a plurality of membrane bag units, and each membrane bag unit comprises a flat sheet membrane. The preparation raw material of the flat sheet membrane is a high polymer doped with a negatively charged microporous frame material. The preparation raw materials of the negative electricity charged microporous framework material comprise 4, 6-dicyanoresorcinol, 1, 4-butane sultone and sylvite. The negatively charged microporous frame material has a rigid microporous structure, can increase water permeation channels in a flat sheet membrane, can form a penetrating structure with membrane pores in the flat sheet membrane, effectively shortens a water transmission path, and improves membrane flux. In addition, the negatively charged microporous frame material also has negatively charged property, has repulsive action on pollutants in the water body, can prevent the pollutants from entering the aperture of the flat sheet membrane, and reduces the pollution blocking phenomenon on the flat sheet membrane.

The invention discloses a cleaning lubricant for textile machinery. The cleaning lubricant comprises the following components in percentage by weight: 6-14% of petroleum ether, 16-26% of solvent oil, 6-14% of alkane oil, 16-26% of 120 # solvent oil, 31-39% of butane gas and 1-9% of dimethyl silicone oil. The invention belongs to the technical field of textile, and particularly relates to a cleaning lubricant for textile machinery, which can clean greasy dirt and dirt on each movable part of a textile mill, a blowing workshop, a drawing workshop, a roving workshop and a spinning workshop. The cleaning lubricant has the technical effects of rust removal, lubrication, rust prevention, wear resistance and non-sticking to all movable parts during cleaning, and the lubricating period of the cleaning lubricant is long.

The invention belongs to the technical field of molecular sieve synthesis, and discloses a ZSM-5 type molecular sieve as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, carrying out calcination treatment and low-temperature plasma treatment on rectorite to obtain modified rectorite; then adding the modified rectorite and a supplementary silicon source into water, sequentially adding butane-1, 4-bis (dodecyl dimethyl ammonium bromide) and hexadecyl trimethyl ammonium bromide, raising the temperature, adding a template agent, adjusting the pH value of the system, and quickly aging by microwave treatment to obtain a precursor; and finally, heating the precursor, carrying out hydrothermal crystallization reaction, washing, drying and grinding a product, and calcining to obtain the ZSM-5 type molecular sieve. The rectorite is used as all aluminum sources and part of silicon sources for molecular sieve synthesis, the aluminum activity and nucleation sites of the rectorite are improved through modification, then two surfactants are introduced, and microwave treatment is combined, so that silicon and aluminum species in a system are rapidly nucleated, and the efficient, economical and higher-performance ZSM-5 type molecular sieve is prepared.

The invention discloses a modified ceramic flame-retardant polyphenyl ether insulated wire and cable material which is prepared from the following raw materials in percentage by mass: 15%-20% of polyphenyl ether resin, 10%-20% of SEBS thermoplastic elastomer, 4%-8% of polypropylene resin, 3%-8% of maleic anhydride grafted material, 5%-20% of melamine cyanurate, 5%-15% of aluminum diethylhypophosphite, 1%-4% of 2, 3-dimethyl-2, 3-diphenyl butane, 10%-30% of compound ceramic powder and 1%-4% of antioxidant. The insulated wire and cable material disclosed by the invention has outstanding electrical insulativity, flowability and water resistance, relatively good wear resistance and electrical performance, good dimensional stability and relatively high heat resistance; the flame-retardant property is good, and the self-extinguishing property is realized; and the ceramic forming property after high-temperature combustion is excellent, and the ceramic still has excellent insulating property after being formed.

The invention relates to the technical field of epoxy resin, in particular to self-repairing epoxy resin and a preparation method thereof. The self-repairing epoxy resin is prepared from the following raw materials in parts by mass: 80 to 120 parts of bisphenol A type epoxy resin, 20 to 40 parts of bisphenol F type epoxy resin, 5 to 15 parts of 1, 6-hexanediol diglycidyl ether, 1 to 3 parts of 3, 5-dimethylphenylboronic acid, 1 to 5 parts of furyl maleimide, 10 to 20 parts of dodecanedioic acid, 5 to 15 parts of butanetetracarboxylic acid, 1 to 3 parts of catalyst, 10 to 15 parts of nano silicon dioxide, 1 to 2 parts of boron nitride nanosheet and 1 to 2 parts of hyperbranched polyamidoamine. The curing agent is prepared from the following components in parts by weight: 20-30 parts of epoxy resin, 1-2 parts of sulfydryl-terminated polysiloxane, 20-30 parts of amine curing agent, 5-15 parts of reinforcing filler and 0.5 According to the invention, the balance among self-repairing capability, mechanical property and heat resistance is successfully realized; in the microcrack propagation process, fracture and recombination mechanisms of dynamic covalent bonds effectively prevent further propagation of cracks.

The invention relates to a membrane separation method and device for separating 1, 3-butadiene from a C4 hydrocarbon mixture. According to the membrane separation method, a C4 hydrocarbon mixture is used as a raw material and is separated through an MOF membrane, and 1, 3-butadiene is obtained on the permeation side of the membrane; the C4 hydrocarbon mixture comprises 1, 3-butadiene, and further comprises one or a combination of more selected from the group consisting of n-butene, isobutene, n-butane, isobutane, cis-2-butene and trans-2-butene; and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90, and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90. The separation is carried out in an MOF membrane separation device, the MOF membrane separation device comprises an MOF membrane separator, and the MOF membrane separator comprises an MOF membrane assembly and the MOF membrane. According to the method, a membrane separation technology is adopted, so that high-purity 1, 3-butadiene can be efficiently obtained in a manner of increasing the productivity.

The invention discloses a preparation method of a 1-(aryl sulfuryl) bicyclo [1.1. 0] butane compound, which comprises the following steps: reacting a compound 1 serving as a raw material with trisubstituted propane and an alkaline reagent in a reaction solvent in an air-isolated environment under the action of an organic catalyst and a metal catalyst at the temperature of-78 to 200 DEG C for 1 to 48 hours to obtain the 1-(aryl sulfuryl) bicyclo [1.1. 0] butane compound. And obtaining a compound 2 after complete reaction. The key raw materials in the synthesis route are cheap and easy to obtain, the reaction conditions are mild, the operation is convenient, the process safety is high, the selectivity is high, the yield is high, the product purity is high, the production cost is greatly reduced, and the production requirement of the product at the ton level or above can be fully met.

The invention relates to the technical field of automobile air purification, and particularly discloses a filtering material, a preparation method of the filtering material and a novel automobile air conditioner multi-effect catalytic formaldehyde removal filter. The filtering material comprises a PET (Polyethylene Terephthalate) supporting layer, a gas filtering layer and a PP (Polypropylene) electrostatic filtering layer which are arranged in sequence, the gas filtering layer is prepared from the following raw materials in parts by weight: 30 to 90 parts of activated carbon and 10 to 70 parts of manganese catalyst. The gas filtering layer composed of the activated carbon and the manganese catalyst is matched with the filtering material composed of the PET supporting layer and the PP electrostatic filtering layer, four gases of n-butane, methylbenzene, sulfur dioxide and nitrogen dioxide can be adsorbed, the manganese catalyst degrades formaldehyde at normal temperature, meanwhile, the reaction on the formaldehyde is a catalytic reaction, and the environment-friendly effect is achieved. Therefore, the filter material disclosed by the invention also has longer service life, so that a filter made of the filter material has a better formaldehyde removal effect and longer service life.

The invention provides a low-temperature electrolyte, a preparation method thereof and a lithium battery, and relates to the technical field of lithium batteries. The method provided by the invention comprises the following steps: adding a lithium salt and an electrolyte additive into an organic solvent, stirring and dissolving to obtain a low-temperature electrolyte; and the electrolyte additive comprises at least one of lithium nonafluoro-1-butane sulfonate, potassium bis (nonafluoro-1-butane sulfonimide) and potassium perfluorobutanesulfonate. The low-temperature electrolyte can effectively improve the ionic conductivity of the lithium battery, optimizes an SEI film and a CEI film on the surface of an electrode to inhibit the growth of lithium dendrites and the decomposition of the electrolyte, and reduces the energy barrier of lithium ions in the desolvation process during transmission to improve the capacity retention ratio of the lithium battery at low temperature.

The invention provides a post-added nanocellulose enhancing auxiliary agent for latex paint coating and a preparation method and a use method thereof, and the preparation method comprises the following steps: mixing, stirring and heating butanetetracarboxylic acid, sodium hypophosphite and a nanocellulose solution to obtain an esterified nanocellulose solution; adding a silane coupling agent solution into the esterified nanocellulose solution to obtain a modified nanocellulose solution; dispersing nano silicon dioxide into absolute ethyl alcohol to obtain silicon dioxide dispersion liquid; adding a silane coupling agent solution into the silicon dioxide dispersion liquid, mixing, stirring and heating for reaction to obtain modified silicon dioxide powder; dispersing the modified silicon dioxide powder into absolute ethyl alcohol to obtain modified silicon dioxide dispersion liquid; adding the compound emulsifier solution into the modified silicon dioxide dispersion liquid, and shearing and emulsifying to obtain modified silicon dioxide emulsion; and adding a compatilizer into the modified nano cellulose solution, dropwise adding the modified silicon dioxide emulsion, and finally adjusting the viscosity.

The invention relates to the technical field of chemical separation, and discloses an isomerization system and process for 1-butene in etherified C4. Comprising an isomerization reactor, a coalescer, a heat exchanger, a static mixer and a filter, an inlet of the coalescer is connected with an etherified C4 pipeline, an outlet pipeline of the coalescer penetrates through the heat exchanger to be connected with an inlet of the static mixer, the inlet of the static mixer is further connected with a hydrogen pipeline, and an outlet of the static mixer is connected with an inlet of the isomerization reactor. An isomerization reactor outlet is connected with a filter inlet, and a filter outlet pipeline enters the isobutane separation tower. According to the method, 1-butene in etherified C4 is isomerized, and after 1-butene is isomerized into 2-butene by utilizing the relatively small relative volatility of 1-butene and iso-butane and the relatively large relative volatility of 2-butene and iso-butane, the content of 1-butene in the raw material is reduced, the separation difficulty of iso-butane is reduced, and iso-butane with the same purity is obtained; the reflux ratio of the isobutane separation tower can be reduced, and the purpose of saving energy is achieved.

Environmentally friendly refrigerant blends utilizing refrigerants including 2,3,3,3-tetrafluoropropene (HFO-1234yf), 1,2-difluoroethylene, at least one hydrocarbon selected from the group consisting of propane, cyclopropane, propylene, isobutane, and n-butane, and optionally 1,1-difluoroethane (HFC-152a). The blends have low GWP, low toxicity, and low flammability with low temperature glide for use in a hybrid, mild hybrid, plug-in hybrid, or full electric vehicles for thermal management (transferring heat from one part of the vehicle to the other) of the passenger compartment providing air conditioning (A / C) or heating to the passenger cabin.

The utility model discloses an alkane storage tank precooling system which comprises a normal-temperature pressure storage tank and a low-temperature normal-pressure storage tank which are communicated through a conveying pipeline, the conveying pipeline leads to the low-temperature normal-pressure storage tank from the normal-temperature pressure storage tank, a decompression flash evaporation device is arranged on the conveying pipeline, and a tank inlet pipeline in the conveying pipeline after decompression is a precooling pipeline. A spray head is arranged at an output port of the pre-cooling pipeline and is arranged above an inner tank of the low-temperature normal-pressure storage tank. Low-temperature propane / low-temperature butane gas is not received from the transport ship to carry out gas-phase precooling on the low-temperature propane / butane normal-pressure storage tank, low-temperature liquid-phase propane / low-temperature liquid-phase butane is not output by a cabin sweeping pump to carry out liquid-phase precooling on the low-temperature propane / butane normal-pressure storage tank, and precooling of the low-temperature propane / butane normal-pressure storage tank is completed before the overseas transport ship berths. The pre-cooling process is not influenced by weather, tide and other environmental factors, and operation is more stable; the outer wheel parking cost is not generated, wharfs are not involved in the pre-cooling process, dispatching and operation are limited to a reservoir area, and if emergencies are small in wave range, processing is more timely.

The invention provides a method for enriching diluents with butane so as not to violate pre-defined limits for liquid hydrocarbon fuels with respect to density, volatility and low density hydrocarbon content.

The invention belongs to the field of water washing towers, and particularly relates to a multi-stage water washing system for butane dehydrogenation purification, the multi-stage water washing system comprises a tower body, a plurality of groups of filler assemblies and a plurality of groups of spraying assemblies are arranged in the tower body from top to bottom in a staggered manner, and each filler assembly comprises a fixed ring plate I fixedly arranged on the inner wall of the tower body; three packing layer plates which are stacked up and down are arranged at the center position of the first fixing ring plate, two sets of first driving assemblies which are symmetrical about the circle center of the first fixing ring plate are arranged on the first fixing ring plate, the first driving assemblies are connected with the upper packing layer plate and the lower packing layer plate in the packing assemblies, and second driving assemblies are jointly arranged between the first driving assemblies and the corresponding first fixing ring plate; the second driving assembly is connected with the middle packing layer plate. The packing layer is divided, the spraying frame is adjustable, the cleaning effect and convenience are improved, rapid cleaning can be achieved, the production efficiency is improved, the cost is reduced, impurities are efficiently removed, a catalyst is protected, the service life of equipment is prolonged, and the device is reasonable in structure and easy to implement.

The invention relates to the technical field of iso-butane production, and discloses iso-butane production equipment which comprises a reaction kettle, a motor is mounted on the reaction kettle, a transmission shaft is rotationally connected to the upper portion of the reaction kettle, a revolution frame is rotationally connected to the inner wall of the transmission shaft, the revolution frame and the transmission shaft are driven by the motor, and the revolution frame is rotationally connected with the reaction kettle. The transmission shaft is sleeved with a reciprocating frame, a reciprocating driving module for driving the reciprocating frame to reciprocate in the axis direction of the reaction kettle is installed on the revolution frame, two liquid mixing tables are slidably connected to the inner wall of the revolution frame, and connecting rods are hinged between the two liquid mixing tables and the reciprocating frame. When the movable-point displacement type multi-angle mixing device works, movable-point displacement type multi-angle mixing operation of raw materials in the reaction kettle can be achieved, and when the motor outputs the rotating speed, through the arrangement of the reciprocating toothed plate, the missing gear and the spring, after the motor outputs the rotating speed, the reciprocating frame can reciprocate in the set stroke in the axis direction of the reaction kettle.

The invention discloses a continuous foaming composite process for a pearl wool coiled material and a waste gas recovery system thereof, and belongs to the technical field of pearl wool processing. Aiming at the problems of low efficiency and waste gas pollution of a traditional intermittent process, the process realizes continuous production through raw material selection (the melt index of LDPE is 1.0-2.5 g / 10min), drying and mixing pretreatment, melting and plasticizing through a twin-screw extruder, injection of foaming agents such as butane under the pressure of 8-12MPa, extrusion foaming at a die head of 140-160 DEG C and combination of air-cooling and water-cooling shaping. The compounding link comprises multiple processes such as hot pressing and co-extrusion to adapt to different base materials, after-treatment is conducted through trimming, taper tension coiling and standing stress release, the product density fluctuation is + / -3%, and the peel strength is larger than or equal to 3 N / cm. According to the waste gas recovery system, negative pressure collection is conducted through a closed gas collecting hood, indirect cooling and alkali liquor spraying pretreatment are conducted, activated carbon adsorption concentration and catalytic combustion purification are conducted, the VOCs removal rate is larger than or equal to 98%, the emission concentration is smaller than or equal to 50 mg / m < 3 >, and efficient production and environmental protection benefits are achieved.

The invention relates to the technical field of adsorption material preparation, in particular to modified activated carbon for removing n-butane and a preparation method thereof.The preparation method comprises the following steps that S1, coconut shell charcoal is impregnated and activated, and activated activated carbon is obtained; s2, enabling the activated active carbon to react with polyethyleneimine and epoxy chloropropane to obtain polyethyleneimine-loaded active carbon; s3, dispersing the active carbon loaded with polyethyleneimine in DMF, adding EDC, NHS and 2, 5-bis (trifluoromethyl) terephthalic acid, and reacting to obtain functionalized active carbon; s4, reacting the sucrose modified molecular sieve with an aminated silane coupling agent to obtain a composite modified molecular sieve; s5, reacting the composite modified molecular sieve, the functionalized activated carbon and glutaraldehyde to obtain the modified activated carbon. The functionalized activated carbon and the composite modified molecular sieve are covalently linked through the chemical cross-linking agent to form multiple adsorption sites, so that the adsorption capacity of the modified activated carbon to n-butane is remarkably improved.

The invention belongs to the technical field of organic synthesis, and particularly relates to a catalyst-free continuous production method of chlorotert-butane, which comprises the following steps: adding diluted hydrochloric acid as a starting solution into the tower kettle of a reactive distillation tower, and heating the tower kettle to boil until reflux exists at the tower top; the method comprises the following steps: adding tert-butyl alcohol and concentrated hydrochloric acid into a mixing preheater for preheating, then continuously feeding from a feed port of a reactive distillation tower until the tower top temperature is 45-48 DEG C, the side discharge port temperature is 50-52 DEG C and the tower kettle temperature is 96-105 DEG C, and carrying out reflux according to a reflux ratio of (1.5-3): 1; and continuously extracting crude chlorinated tert-butane from a side discharge port of the tower, cooling, neutralizing, drying and filtering to obtain the chlorinated tert-butane. According to the invention, through the integrated design of the mixing preheater and the reactive distillation column, especially by utilizing the reactive distillation technology to continuously remove the product, the chemical equilibrium limitation of the traditional intermittent process is successfully broken, the raw material conversion rate is obviously improved, and meanwhile, the green production targets of flow simplification, energy consumption reduction and three-waste emission reduction are realized.

The invention discloses a catalyst for inhibiting dehydrogenation isomerization of n-butane as well as a preparation method and application of the catalyst, and belongs to the technical field of catalysts. The catalyst for inhibiting dehydrogenation isomerization of n-butane comprises a carrier, a platinum element and indium oxide, the platinum element and the indium oxide are loaded on the carrier, the mass percentage of the platinum element in the catalyst is at least 0.05 wt%, and the mass percentage of the indium element in the catalyst is 0.5-8 wt%. According to the catalyst for inhibiting the dehydrogenation isomerization of the n-butane, through the synergistic effect of the platinum elementary substance and the indium oxide loaded on the carrier, in the dehydrogenation reaction of the n-butane, the conversion efficiency of the n-butane is improved, the side reaction of the dehydrogenation isomerization of the n-butane is inhibited, and the selectivity of a byproduct isobutene is reduced; therefore, the selectivity of the target product butadiene is improved.

Catalysts that include a first zeolite selected from ZSM-5 and Y zeolite impregnated with P2O5 and a second zeolite different from the first zeolite selected from ZSM-5 and Y zeolite impregnated with La2O3. The catalysts can also include alumina, clay, and silica. The catalysts can be used to crack vacuum gas oil (VGO) into gasoline and butylenes. The catalysts can crack VGO with relatively good selectivity for butylenes over butanes.

To provide a carbonaceous material with high performance of adsorbing butanes, a method for producing the same, and an adsorption filter.SOLUTION: With respect to a carbonaceous material according to the present invention, the pore volume (cm3 / g) of pores that each have a pore diameter of 0.80 nm or less as calculated by a QSDFT method per 1 g of the carbonaceous material from the nitrogen adsorption isotherm is from 0.23 cm3 / g to 0.35 cm3 / g inclusive, the packing density as determined in accordance with JIS K1474 (2014) is from 0.43 g / mL to 0.65 g / mL inclusive, and the reactive black 5 value is from 3.0 g / L to 60.0 g / L inclusive.SELECTED DRAWING: Figure 1

The invention provides a spiro butane indolone derivative as well as a preparation method and application thereof, and belongs to the technical field of organic chemical synthesis. The series cyclization coupling reaction of the N-iodo aryl dicyclobutyl amide compound and the vinyl pyridine compound is realized by utilizing a photocatalytic system, and the method is used for constructing the spiro butane indolone derivative containing the pyridine structure. The spirobutane indolone derivative synthesized by the invention has an inhibition effect on H1975 human lung adenocarcinoma cells; the preparation method provided by the invention is mild in condition and simple and convenient to operate, has economical steps, provides a convenient synthesis way for the complex bioactive molecules, and has a good application prospect.

The invention provides an alkylation product separation system, a separation method, an alkylation process system and a method. A liquid phase discharge port of an isobutane fractionation device in the separation system is connected with a feed pipeline of an n-butane fractionation device through an isobutane tower bottom pump; the propane compression refrigeration device comprises an isobutane overhead condenser, a throttling expansion valve, a circulating water cooler, a refrigeration compressor and a refrigerant tank, the isobutane overhead condenser is arranged at the top of the low-temperature isobutane rectifying tower, and a gas phase at the top of the low-temperature isobutane rectifying tower is cooled and refluxed; a refrigerant liquid phase inlet of the isobutane overhead condenser is connected with a gas phase outlet of the refrigerant tank through the throttling expansion valve, the circulating water cooler and the refrigeration compressor in sequence, and a gas phase refrigerant of the isobutane overhead condenser is mixed with part of liquid phase of the throttling expansion valve through a pipeline and input into the refrigerant tank. The low-temperature isobutane rectifying tower adopting low-temperature heat supply at the tower bottom is combined with a high-energy-efficiency compression refrigeration system for cooling at the tower top, so that the separation difficulty is effectively reduced, the energy utilization rate is improved, and the separation energy consumption and the process cost are saved.

The invention discloses an MFI type molecular sieve membrane as well as a controllable preparation method and application thereof, and relates to the technical field of inorganic membrane material preparation, the residual amount of an organic template agent in membrane pores is adjusted by controlling ozone calcination conditions, the pore diameter of the membrane is accurately regulated and controlled, the organic template agent in the pores is gradually oxidized and removed along with the prolonging of calcination time, and the pore diameter of the membrane is reduced. The preparation method comprises the following steps: preparing a seed crystal reaction gel, preparing an MFI type molecular sieve seed crystal, preparing a support body seed crystal, preliminarily preparing the MFI type molecular sieve membrane, and preparing the MFI type molecular sieve membrane. The prepared MFI type molecular sieve membrane has excellent performance on separation of small-size molecules and large-size molecules and can be used for separation of system gases such as hydrogen / iso-butane, methane / iso-butane and n-butane / iso-butane, the preparation process is simpler and more convenient, and the separation effect on the small-size molecules and the large-size molecules is more efficient; therefore, the separation requirements under different conditions are met.

The invention relates to the technical field of ionic liquid synthesis and catalytic synthesis of hydroxybutyl acrylate, in particular to a functional double-acid supported ionic liquid as well as a preparation method and application thereof. The functional double-acid supported ionic liquid comprises an MOFs (Metal-Organic Frameworks) material UiO-66-SO3H and a double-acid ionic liquid supported on the MOFs material. The synthesis of the double-acidified ionic liquid comprises the following steps: synthesizing a dimethyl monomer by adopting imidazole, pyrrolidine or morpholine; reacting the dimethyl monomer with 1, 4-butane sultone to generate sulfonic acid inner salt; and acidifying sulfonic acid internal hydrochloric acid. The functionalized double-acid supported ionic liquid has the advantages that the heat stability and the reusability are good; the product is immiscible with an organic reaction solvent and is easier to separate and recover; as a catalyst for catalyzing esterification reaction, the catalytic activity is obviously improved; as a solid catalyst in an esterification reaction, the catalyst can be applied to a fixed bed reactor, continuous esterification is realized, and the productivity is improved.

The invention discloses a soft measurement modeling and real-time optimization control method for an n-butane removal tower of an alkylation device, and the method comprises the steps: firstly, determining a control variable and a controlled variable of a system based on historical operation data and mechanism analysis, and building a dynamic model of the system; and establishing an LSTM neural network by using off-line sample data of the n-butane removal tower to predict the purity of n-butane at the tower top. And then, on the basis of the dynamic model of the system, an MPC controller is used as an upper controller of a PID controller, and the dynamic adjustment capability and the control precision of the system are improved by predicting and optimizing an operation sequence. And finally, in combination with a real-time optimization (RTO) technology, the maximum n-butane concentration and the minimum tower energy consumption are set as objective functions, and the operation cost and the energy efficiency are optimized. The control precision of the n-butane removal tower can be effectively improved, the product quality is optimized, the energy consumption is reduced, the adaptability of the system to the working condition change is enhanced, and the method is suitable for industrial application.

The invention relates to shaped activated carbon, a preparation method and application, in particular to the field of activated carbon preparation, and the shaped activated carbon comprises activated carbon powder, a cellulose binder, an emulsion binder, a reinforcing agent, a lubricant and a solvent. According to the shaped activated carbon provided by the invention, the activated carbon with high specific surface area and narrow pore size distribution, the binder and the additive are used for preparing columnar or honeycomb-shaped activated carbon with high specific surface area, high ball disc strength, high butane working capacity and relatively small pulverization wear, and the shaped activated carbon can be used for adsorbing and / or storing gasoline steam in an automobile carbon tank.

The invention discloses a heat transfer composition for replacing R123, the heat transfer composition comprises 30-98 wt% of Z-1-chloro-3, 3, 3-trifluoropropene, 1-65 wt% of Z-1, 3, 3, 3-tetrafluoropropene and 1-5 wt% of n-butane, the evaporation enthalpy of the heat transfer composition under standard atmospheric pressure is greater than 250 KJ / kg, and the average relative deviation AAD of saturated vapor pressure of the heat transfer composition at any temperature within 15-145 DEG C is less than 50%. The heat transfer composition has the advantages of being excellent in environmental performance, good in safety performance, high in unit volume heating / refrigerating capacity, high in latent heat of vaporization, good in heat transfer performance, large in expansion work and the like.

The invention discloses a limestone-gypsum wet flue gas desulfurization composite synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The limestone-gypsum wet flue gas desulfurization composite synergist is prepared from the following raw materials in parts by weight: 15 to 18 parts of organic acid, 5 to 8 parts of oxidation catalyst, 8 to 10 parts of sodium salt, 5 to 10 parts of magnesium salt, 12 to 15 parts of surfactant, 5 to 8 parts of organic acid alkali metal salt and 4 to 5 parts of dispersing agent. The preparation method comprises the following steps: reacting 2-dodecene-1-yl succinic anhydride with N, N-dimethyl ethylenediamine to generate a monoamide compound, reacting the monoamide compound with epoxy chloropropane to generate a quaternary ammonium salt compound, and reacting the quaternary ammonium salt compound with sodium sulfanilate to generate the surfactant. The limestone-gypsum wet flue gas desulfurization composite synergist prepared by the invention can promote dissolution of calcium carbonate, and shows good desulfurization efficiency.