27 results about "Macromolecular architecture" patented technology

This invention discloses a method and system for converting waste plastics into hydrogen based on microwave pretreatment and solar photocatalytic reforming, belonging to the field of solid waste resource utilization and clean energy technology. The method includes: mixing waste plastics with water for microwave pretreatment to destroy their macromolecular structure and generate a liquid-phase product rich in small-molecule organic matter; performing solid-liquid separation on the liquid-phase product; and conveying the separated liquid to a flat-plate photocatalytic reactor for photocatalytic reforming under sunlight irradiation and the action of a catalyst supported on a 3D-printed substrate to produce hydrogen and high-value chemicals. The system includes a microwave pretreatment unit, a filtration unit, and a flat-plate photocatalytic reaction unit connected in sequence. This invention achieves efficient, low-carbon, and high-value conversion of waste plastics through the synergy of microwave pretreatment and solar photocatalytic reforming, effectively overcoming the problems of high energy consumption, poor product selectivity, and low photocatalytic efficiency in existing technologies.

The application discloses a preparation method of organic garbage carbon source by composite enzyme combined with nitrogen precipitation. Firstly, enzyme pretreatment is performed on organic garbage materials, starch enzyme, cellulase and hemicellulase are used in cooperation to make macromolecular structure of organic matter be broken, so that preliminary release and partial dissolution of carbon source substances are realized; subsequently, sodium tetraphenylborate is added in the pretreatment system to selectively precipitate nitrogen substances in the solution, and centrifugal separation is performed to reduce nitrogen content of the system; on the basis, potassium persulfate and iron substances are added into the obtained suspension liquid to build a Fenton-like reaction system, residual organic macromolecules are further oxidized and degraded, and the structure is optimized, so that availability and stability of the carbon source are improved. In the whole process, each link cooperates, so that the organic garbage can be efficiently converted into high-quality carbon source with high C / N ratio and COD value, and can be used in a sewage treatment system as stable external carbon source.

The invention relates to a film material film processing device and method for a rotary kiln, the film material film processing device comprises a rotating shaft arranged in the center of the rotary kiln, a rotating shaft rotating speed adjusting mechanism and a plurality of film mechanisms vertically and fixedly arranged on the rotating shaft, the film mechanisms are rotationally arranged in the rotary kiln, and the rotating speed adjusting mechanism controls the rotating shaft to rotate; the adjusting rotation speed is related to the combustibility of the processed object; the solid waste and the hazardous waste in the furnace are pressed into a molten film state through the continuous rotary pushing and compacting effect of the film forming mechanism and are evenly distributed on the inner side wall face of the rotary kiln. By means of the material thinning mechanism, on one hand, the contact surface area of solid waste and hazardous waste and the wall face of the rotary kiln is increased, the heat exchange effect of the solid waste and hazardous waste and the rotary kiln is enhanced, and therefore the pyrolysis effect and combustion efficiency of the solid waste and hazardous waste are improved; and on the other hand, the fragmentation degree of macromolecular structures of solid waste and hazardous waste subjected to film treatment is more thorough, and pyrolysis is more thorough, so that the operation energy consumption of the secondary combustion chamber can be further reduced, and the overall operation efficiency of the system and the steam output quality are improved.

The invention relates to a carbon molecular sieve and a preparation method thereof, and the preparation method of the carbon molecular sieve comprises the following steps: removing inorganic matters in biochar to less than 100 ppm; mixing the biochar and urea, and then putting the mixture into a reaction furnace to react and crosslink to form a macromolecular structure; grinding the macromolecular structure into biochar particles; mixing the biological coke particles with biological pyrolytic oil and water, and performing extrusion molding to obtain a carbon molecular sieve extrusion material; carbonizing the carbon molecular sieve extruded material in a rotary furnace; after carbonization is completed, water vapor is introduced into the rotary furnace for activation; after activation is completed, benzene is introduced into the rotary furnace for deposition, and the carbon molecular sieve is obtained. According to the carbon molecular sieve and the preparation method, the biochar is used as a carbon source, the raw material price is low, and the production cost is reduced.

The invention relates to a catalytic system based on at least one neodymocene borohydride, a co-catalyst which is a dialkylmagnesium compound of formula RB-Mg-RL, in which RB is a secondary alkyl of formula R2CH and RL is a primary alkyl of formula RCH2, the Rs, identical or different, being alkyls. The catalytic system addresses the objective of improved macrostructure control in a polymerization process of ethylene or a monomer mixture containing ethylene and a 1,3-diene.

The invention discloses a preparation method of castor oil-based biomass lubricant base oil, and belongs to the technical field of base oil. The preparation method comprises the following steps: ester exchange reaction, esterification reaction, epoxidation reaction, ring-opening reaction and bridging esterification reaction. The prepared base oil constructs a macromolecular structure through bridging esterification, so that the base oil is endowed with high viscosity; unstable carbon-carbon double bonds in the raw materials are eliminated through the epoxidation step, the flash point of the base oil is increased, and the service life of the oil product is prolonged; the introduced long-chain alkyl side chain effectively prevents molecules from crystallizing at low temperature, and the pour point is reduced; castor oil is used as an initial raw material, and the source is renewable; the final ester structure is easily decomposed by microorganisms and is environment-friendly; in a word, the biomass raw material is successfully converted into the base oil with'high viscosity index, low pour point, high flash point and good biodegradability 'through an innovative synthesis route, and the base oil has important application value in the technical field of base oil.

The preparation method comprises the following steps: adding 5-30 parts of tannic acid into a low-boiling-point polar solvent, adding 2-40 parts of isocyanate under stirring and nitrogen protection, carrying out a stirring reaction at room temperature to 70 DEG C for 0.5-10 h, adding 1-20 parts of hydroxyethyl acrylate, continuously carrying out a reaction at room temperature to 70 DEG C for 0.5-10 h, and carrying out a reaction at room temperature to 70 DEG C for 0.5-10 h so as to obtain the delayed-light-curing environment-friendly adhesive composition. The preparation method comprises the following steps: adding 5-30 parts of epoxidized soybean oil acrylic resin, 1-30 parts of bisphenol epoxy acrylate and 1-20 parts of a diluent, uniformly stirring, adding 1-6 parts of a cationic photoinitiator and 0.5-4 parts of a free radical photoinitiator, stirring, and evaporating to remove a solvent under reduced pressure to obtain the adhesive. The property of a natural material tannic acid is utilized, isocyanate is used for blocking to form a macromolecular structure containing isocyanate, the bonding strength of the adhesive is enhanced through introduction of an isocyanate group and bisphenol epoxy acrylate, the epoxidized soybean oil acrylic resin has the characteristics of being green and low in toxicity, and as one of the components of the adhesive, the epoxy soybean oil acrylic resin has the advantages of being environmentally friendly and low in toxicity. And the safety of the product can be obviously improved.

The application discloses polyacrylonitrile primary fiber, polyacrylonitrile fiber and a preparation method and application thereof, and belongs to the technical field of high polymer materials and fiber manufacturing. A part of cyano groups on a molecular chain is converted into carboxylic acid salt by performing a partial hydrolysis reaction on polyacrylonitrile in a mixed system of an organic solvent and an inorganic alkali aqueous solution through ultrasonic assistance; the hydrolysis product is dissolved to prepare a spinning solution, and after jetting, in-situ acidification and coagulation and stretching in a coagulation bath containing a protonic acid, a polyacrylonitrile primary fiber containing a carboxyl group is obtained. After washing and stretching, the primary fiber is crosslinked and heat-drawn under high-temperature and negative-pressure conditions, so that the carboxyl groups between the molecular chains are dehydrated to form anhydride bonds, a three-dimensional network macromolecular structure is constructed, and a high-strength polyacrylonitrile fiber is obtained through relaxation and heat setting. The polyacrylonitrile fiber has a breaking strength greater than 9.0 cN / dtex, has the advantages of high strength, stable structure and strong controllability of process, and can be suitable for industrialized production of high-strength polyacrylonitrile fiber.

Provided herein are macromolecular structures comprising a surface, tethered moiety, and a macromolecular chain, compositions thereof, and methods of making the same. Also provided herein are systems and kits comprising the macromolecular structures.

The invention relates to the technical field of food processing, and discloses tremella aurantialba and blueberry anthocyanin synergistic antioxidant jelly and a preparation method thereof.The jelly is prepared from, by weight, tremella aurantialba polysaccharide, blueberry anthocyanin extract, a sweetening agent, a pH regulator and water. The beverage is prepared from the following raw material components: 2.0 to 5.0 percent of tremella aurantialba polysaccharide, 0.1 to 0.5 percent of blueberry anthocyanin extract, 5.0 to 10.0 percent of sweetening agent, 0.05 to 0.2 percent of pH (Potential of Hydrogen) regulator and the balance of water. Hydroxyl of tremella aurantialba polysaccharide can remove part of free radicals, meanwhile, the macromolecular structure of the tremella aurantialba polysaccharide can serve as a carrier to wrap anthocyanin molecules and promote dispersion and absorption of anthocyanin, blueberry anthocyanin efficiently removes the free radicals through electron transfer of phenolic hydroxyl, and under the synergistic effect of the tremella aurantialba polysaccharide and the blueberry anthocyanin, the DPPH free radical scavenging rate of the jelly is larger than 90%. Compared with single tremella aurantialba polysaccharide jelly, the removal rate is increased by 50-60%, and compared with single blueberry anthocyanin jelly, the removal rate is increased by more than three%, and the antioxidant function is remarkably enhanced.

The invention discloses a method for preparing an organic garbage carbon source by combining compound enzyme with nitrogen precipitation. The method comprises the following steps: firstly, carrying out enzyme pretreatment on an organic garbage material, and breaking a macromolecular structure of an organic matter by adopting a synergistic effect of amylase, cellulase and hemicellulase, so as to realize primary release and partial dissolution of a carbon source substance; then, sodium tetraphenylborate is added into the pretreatment system, nitrogen substances in the solution are selectively precipitated, and the nitrogen content of the system is reduced through centrifugal separation; on the basis, potassium persulfate and iron substances are added into the obtained turbid liquid, a Fenton-like reaction system is constructed, residual organic macromolecules are further oxidized and degraded, and the structure of the residual organic macromolecules is optimized, so that the availability and the stability of a carbon source are improved. In the whole technological process, all links have a synergistic effect, so that the organic garbage can be efficiently converted into a high-quality carbon source with a relatively high C / N ratio and a relatively high COD value, and the carbon source can be used as a stable exogenous carbon source in a sewage treatment system.

The invention provides acne-removing essence cream based on plant extraction components and a preparation method thereof. A macromolecular emulsifier 1 and a macromolecular emulsifier 2 are added into the acne-removing essence cream. The macromolecular emulsifier 1 is a product obtained by esterifying PEG100 stearate and acrylic acid and then carrying out free radical polymerization; the macromolecular emulsifier 2 is a product obtained by esterifying cetearyl glucoside and acrylic acid and then carrying out free radical polymerization on the esterified cetearyl glucoside and acrylic acid. Both the macromolecular emulsifier 1 and the macromolecular emulsifier 2 have macromolecular structures, so that the viscosity of the system can be improved, and meanwhile, a mutually wound network structure is easily formed among macromolecular chains, so that the cohesion of the system can be improved, and the viscosity of the system can be maintained. And on the other hand, a polymerization unit of the macromolecular emulsifier 2 contains a large number of hydroxyl groups, the density of hydrogen bonds after polymerization can be greatly improved, and the macromolecular emulsifier 2 can be more tightly combined with other components, so that the stability of the system is enhanced, and the viscosity of the system can be further stabilized.

The present application belongs to the technical field of one-component moisture-cured polyurethane sealant, and relates to a weather-resistant polyurethane plasticizer, a polyurethane bonding sealant for rail transit window glass, and a preparation method and application thereof.A weather-resistant polyurethane plasticizer is obtained by carrying out a first-step polymerization reaction of a diisocyanate compound and a polyether diol, and then adding an excess of 1,2,2,6,6-pentamethylpiperidinol to carry out a second-step polymerization reaction to completely cap the isocyanate groups.The polyurethane bonding sealant for rail transit window glass prepared by using the weather-resistant polyurethane plasticizer can continuously remove harmful free radicals generated by material aging, block photo-oxygen aging chain reactions, and thus improve weather resistance.In addition, the weather-resistant plasticizer has a macromolecular structure, is difficult to migrate, has excellent environmental protection, and can remain stable in a long-term fatigue vibration environment, and is not prone to problems such as mechanical property attenuation, hardness increase, or elongation rate decrease.

The invention provides a gel electrode suitable for training in plateau cold regions and a preparation method of the gel electrode, and belongs to the technical field of gel electrodes. The method comprises the following steps: dip-coating a fiber base material in a hydrogel precursor solution, crosslinking, dehydrating, and immersing in a hydrophobic composite electrolyte solution to obtain a target electrode. The hydrophobic composite electrolyte solution is formed by compounding fluorinated ionic liquid and hydrophobic fluorosilicone oil or perfluoropolyether, and by dehydrating a gel matrix and adopting a hydrophobic electrolyte system, the electrode does not swell and is prevented from adsorbing condensed water; due to the macromolecular structure characteristic of the electrolyte system, the electrolyte system can still keep stable form and performance in low-pressure, low-temperature and high-temperature environments; carbodiimide and transglutaminase are used for carrying out double crosslinking on biomass colloid, the biocompatibility is good, and the obtained crosslinked gel network has the characteristics of no dissolution and no melting. The method provides a key technical guarantee for long-term reliable monitoring in complex environments such as plateau alpine regions, low pressure and oxygen deficit.

This invention discloses a method for preparing and applying anionic waterborne polyaspartic acid ester resin. The preparation method is as follows: (1) reacting an aliphatic polyamine with dialkyl maleate to obtain polyaspartic acid ester; (2) performing an ester exchange reaction between the obtained polyaspartic acid ester and hydroxyalkyl sulfonate to obtain the anionic waterborne polyaspartic acid ester resin. This invention uses hydroxysulfonate to modify polyaspartic acid ester to obtain anionic waterborne polyaspartic acid ester resin with a dendritic macromolecular structure in which anionic sulfonic acid groups extend outward. It can achieve self-emulsification by using water as a solvent, and has better emulsification properties when combined with sulfonate-modified isocyanate curing agents. When applied to coatings, it can produce waterborne PAE polyurea coatings with high strength, high adhesion, and good wear resistance and corrosion resistance.

The invention provides a preparation method of a rapid photocuring cellulose-based macromolecular photoinitiator. According to the method, 2, 4, 6-trimethylbenzoyl phenylphosphonic acid is used as an initial molecule, an acylating chlorination intermediate with high reactivity is generated through oxalyl chloride activation, then the acylating chlorination intermediate and a cellulose main chain are subjected to a bonding reaction, and effective grafting of a photosensitive structure to a natural polymer skeleton is achieved. Then, esterification regulators such as acetyl bromide and the like are introduced, so that the arrangement and density of the grafting groups on the surface of the cellulose can be further improved, and the esterified cellulose photoinitiator with a uniform functionalization degree is obtained. The obtained initiating material shows good solubility and system adaptability in various acrylate monomers, and can rapidly initiate chain polymerization under ultraviolet irradiation, so that a formula system is converted into a curing network with a bonding function within an extremely short time. The acrylate material initiated by the photoinitiator can be cured within seconds to minutes under a common 365 nm light source. Compared with a small molecular initiator, the macromolecular structure effectively reduces the migration risk, avoids complex operation steps, has the advantages of clean raw materials, high safety, capability of being matched with various monomer systems and the like, and remarkably widens the utilization range of cellulose in the fields of photocuring adhesives and functional resin materials.

The pretreatment device comprises a box body, a hanging basket, a lye tank and an acid neutralization tank, wherein the hanging basket is transversely and movably arranged at the upper part of the box body and is used for containing tobacco plant residue particles; the lye tank is arranged below the hanging basket; the acid neutralization tank is arranged at the downstream of the lye tank along the moving direction of the hanging basket; the lye tank and the acid neutralization tank are respectively arranged on a bracket in the box body in a lifting manner; a liquid collecting tank capable of moving back and forth is arranged on the bracket of the acid neutralization tank, and is positioned between the hanging basket and the acid neutralization tank in the horizontal direction. By arranging the lye tank, tobacco plant residue particles are soaked in lye, cell walls of tobacco straws are deconstructed, and a natural macromolecular structure of lignin is reserved, so that tobacco plant residues are easier to compost and decompose; the acid neutralization tank is used for neutralizing alkali liquor, the pH value of biomass is adjusted to be neutral, and a microbial agent can be conveniently added into treated tobacco plant residue particles subsequently, so that decomposition of tobacco plant residues and conversion of nicotine are accelerated.

The invention belongs to the technical field of oil-gas field development and unconventional natural gas extraction, and discloses a deep coal seam in-situ pore wettability characterization method based on molecular simulation. The method comprises the following steps: screening a coal macromolecular structure model, and constructing a deep coal seam coal matrix model by adopting a coal molecular structure unit; constructing a layered interface model for calculating different interfacial tensions, performing molecular dynamics simulation on the layered model, and recording a pressure tensor track; pressure tensor data in the dynamic simulation process is extracted, layered statistics is conducted in the Z direction, the interfacial tension is calculated based on a pressure tensor method, and then the contact angle is calculated to represent the wettability of the reservoir. The convergence condition of the pressure difference along with the displacement can be automatically monitored, and the real boundary of the volume phase and the interface phase is judged, so that the calculation error generated by the simulation box boundary effect is eliminated, and the interface tension calculation reliability is improved; the micromechanism of low efficiency at the initial stage of deep coal bed gas drainage and production is explained through the layered interface model, and the method has extremely high industrial application value.

The invention relates to the technical field of sodium ion batteries, and discloses a low-cost asphalt cross-linking agent and a preparation method of an asphalt-based hard carbon material of the low-cost asphalt cross-linking agent. The preparation process of the method comprises the following steps: (1) impurity removal and concentration; (2) hydrolysis; (3) polymerizing; and (4) carbonizing. According to the preparation method, a hydroxymethylfurfural solution with high-activity groups is prepared by taking sugar industry waste as a raw material, and further reacts with asphalt to form a macromolecular structure, so that the graphitization process in the high-temperature carbonization process is inhibited, and finally, the sodium-ion battery negative electrode hard carbon material with excellent sodium storage capacity and good cycle performance is prepared. The raw materials used in the invention are sugar industry wastes and petrochemical byproducts, the raw material sources are wide, the production cost of the hard carbon material is significantly reduced, the method has a wide mass production prospect, and an economic and efficient technical scheme is provided for industrial application of the hard carbon material.

The application relates to the technical field of materials, and discloses an antistatic PBT composite material and a preparation method thereof. The PBT composite material is added with auxiliary materials such as a compatilizer, short glass fibers and a modified carbon black additive. The modified carbon black additive is prepared by modifying a macromolecular structure material containing a large number of quaternary ammonium substituents of tetramethylpropylenediamine-polyphenyl ether alternating link on the surface of carbon black. The macromolecular structure material can form a pi-pi conjugation effect with PBT, can improve the compatibility between the carbon black and a polybutylene terephthalate matrix, can promote the uniform dispersion of the carbon black, the quaternary ammonium salt structure of the macromolecular structure material can form a bridge between carbon black particles and carbon black particles, and can form a perfect conductive path with the carbon black particles, thereby improving the antistatic performance of the composite material. The carbon black exists in the form of a crosslinking point, can efficiently utilize the effect of the carbon black as an inorganic additive, and can enhance the mechanical strength of the composite material.

The invention discloses a polyamino positive ion compound and application thereof in biological bacteriostasis / virus resistance, and particularly relates to the field of biological medicine. The invention also discloses application of the polyamino positive ion compound in preparation of biological antibacterial / antiviral products related to biological mucous membranes or skin lesion parts. Nucleic acid biological macromolecules are introduced into the compound to form the compound with a reticular macromolecular structure, so that the compound has a good wrapping and disinfecting effect on pathogens and has a good adhesion effect on mucous membrane tissues or skin lesion parts, and the antibacterial and / or virus-inhibiting effect of polyamino positive ions on the mucous membrane tissues is enhanced; no irritation is caused to mucous membrane tissues; the composition is environment-friendly, animal-friendly or human-body-friendly; the introduced nucleic acid biomacromolecules can excite immune response in mucosa tissues or skin lesion parts of animals and human bodies and synergistically clear pathogenic microorganisms, and the compound can be used in the field of disinfection and bacteriostasis articles for human and veterinary use to inhibit pathogenic microorganism infection and also can be used as a mucosa adjuvant.

The invention belongs to the technical field of adhesives, and particularly relates to a high-elongation UV-thermal dual-curing adhesive and a preparation method thereof.The high-elongation UV-thermal dual-curing adhesive is prepared from, by weight, 20-50 parts of alicyclic epoxy resin; 10 to 25 parts of thiol modified alicyclic epoxy resin; 10 to 25 parts of oxetane; 10 to 30 parts of a toughening agent; 10 to 20 parts of filler; 2-5 parts of a thixotropic agent; 0.5 to 5 parts of a thermal initiator; and 0.5 to 5 parts of a photoinitiator. According to the preparation method provided by the invention, the design of a cation system is adopted, and a thiol structure is introduced into a macromolecular structure of alicyclic epoxy through molecular structure design, so that the finally obtained UV-thermal dual-curing adhesive not only has low shrinkage rate, but also has high elongation, excellent tensile strength and drop resistance; the method can be widely applied to the fields of 3C electronic products, vehicle-mounted electronics and the like.

The invention discloses a method for directly preparing coal-based graphene quantum dots through electrocatalytic oxidation depolymerization of coal water slurry, and belongs to the technical field of clean and efficient utilization of coal and preparation of coal-based nano materials. The method comprises the following steps: constructing a mixed electro-catalytic reaction system by taking coal water slurry as an anolyte and a potassium hydroxide solution as a catholyte; a pulse voltage electrolysis mode is adopted to realize selective bond breaking and controllable depolymerization of a coal macromolecular structure on a specific active site on the surface of the catalyst, so that the coal-based graphene quantum dots are directly prepared. The controllable preparation of the coal-based graphene quantum dots is realized by regulating and controlling the catalyst material, the concentration of the coal slurry solution, the reaction temperature and the pulse voltage parameters, and the highest yield of the coal-based graphene quantum dots can reach 20.1 wt%.

This invention belongs to the field of sodium-ion battery technology, specifically relating to a coal-based carbon material, its preparation method, and its application. The invention provides a method for preparing a coal-based carbon material, comprising the following steps: mixing coal and inorganic salts, ball milling in an oxygen-containing atmosphere, removing the inorganic salts from the mixture to obtain a coal-based precursor; and carbonizing the coal-based precursor to obtain the coal-based carbon material. By adding inorganic salts during ball milling, this invention effectively prevents coal agglomeration, further improves the contact efficiency between coal and oxygen, and disrupts the macromolecular structure of coal. Furthermore, after removing the inorganic salts, subsequent carbonization yields a coal-based carbon material with high carbonization yield, large interlayer spacing, and high amorphousness. Applying the coal-based carbon material provided by this invention to the anode material of sodium-ion batteries results in batteries with high sodium storage capacity and initial coulombic efficiency.

The invention discloses low-RBO epoxy resin and a preparation method thereof, and relates to the technical field of epoxy resin preparation. The preparation method comprises the following steps: by taking 1, 3, 5-tri (hydroxymethyl) benzene and 1, 1, 1-trifluoro-2, 3-epoxypropane as raw materials, obtaining hyperbranched fluorine-containing polyether polyol under the action of a complex of boron trifluoride diethyl etherate and tetrahydrofuran, mixing the hyperbranched fluorine-containing polyether polyol with excessive isophorone diisocyanate to obtain an isocyanate-terminated fluorine-containing polyurethane prepolymer, and reacting the isocyanate-terminated fluorine-containing polyurethane prepolymer with hydroxyl of glycidol to obtain the hyperbranched fluorine-containing polyurethane prepolymer. The preparation method comprises the following steps: preparing a hyperbranched terminal epoxy group fluorine-containing polyurethane prepolymer, carrying out copolymerization on a small molecular monomer, introducing 1, 3, 5-triaminobenzene to obtain a curing agent with a macromolecular structure, and carrying out crosslinking with epoxy resin under the action of the curing agent to form a network structure, so that the precipitation risk can be reduced compared with surface modification of the epoxy resin.

The invention relates to the technical field of high-sulfur coal desulfurization, in particular to a high-sulfur coal desulfurization method based on biology-electrochemistry-biology, which comprises the following steps: injecting desulfurization bacterial liquid into a raw coal layer, and mining after injection and staying to obtain biologically pretreated coal; putting the crushed biologically pretreated coal into an electrochemical washing pool, adding a desulfurization compound bacterial liquid, stirring, electrifying for electrolytic catalysis, and performing solid-liquid separation after the electrolytic catalysis is finished; and feeding the solid into a metal chain plate machine, spraying the desulfurized compound bacterial liquid, heating, and sequentially carrying out heating, destructive distillation and cooling to obtain the low-sulfur clean coal. According to the biological-electrochemical-biological high-sulfur coal desulfurization method disclosed by the invention, inorganic sulfur and organic sulfur in high-sulfur coal are efficiently removed through the coordination of the three steps, and finally, the most stubborn organic sulfur existing in a coal macromolecular structure in a chemical bond form can be cracked by high-temperature dry distillation.

This invention relates to the field of drilling composition technology, specifically to a Mannich base quaternary ammonium salt corrosion inhibitor. The Mannich base quaternary ammonium salt corrosion inhibitor of this invention comprises a bis-Mannich base quaternary ammonium salt, which has the structural formula of Formula I, wherein R is a C8-16 straight-chain alkyl group and X is a halogen. The unique linking group in the bis-Mannich base quaternary ammonium salt structure allows two pyridine rings to be simultaneously adsorbed onto the metal surface. The uniformly distributed nitrogen and oxygen atoms ensure strong adsorption of the corrosion inhibitor. Simultaneously, the directional arrangement of the long-chain alkyl groups attached after quaternization of the nitrogen atoms forms a hydrophobic protective layer. The uniformly distributed nitrogen and oxygen atoms, and the long-chain alkyl groups attached after quaternization of the nitrogen atoms, fill the voids in the protective film formed between the pyridine rings. This achieves improved corrosion inhibition effect of the macromolecular structure of the Mannich base quaternary ammonium salt corrosion inhibitor while maintaining its non-toxicity.