191results about How to "Reduce environmental disposal costs" patented technology

The invention belongs to the texturing field of a crystalline silicon solar cell, and specifically relates to a texturing method for polysilicon wafer cutting by a diamond wire. The texturing method comprises the following steps of 1, preparing a corrosion liquid, putting a silicon wafer into the corrosion liquid to be reacted at a temperature of 20-80 DEG C for 4-15min to form a porous structureon the surface of the silicon wafer; 2, performing water washing on the silicon wafer processed in the first step, and then cleaning the silicon wafer by a demetalization cleaning liquid at a normal temperature to remove solid metal granules from the silicon wafer, wherein the cleaning time is 2-8min; and 3, performing water washing on the silicon wafer processed in the second step for 30-100S; and performing correction on the porous structure on the surface of the silicon wafer by adopting a texturing correction liquid. By cutting the polysilicon surface by the diamond wire, the texturing structure with uniform dimensions, hole diameter of 400nm-1.5mm, hole depth of 200-500nm and low reflectivity can be obtained, thereby improving photoelectric conversion efficiency effectively.

The invention discloses a photoelectric thin film capable of strengthening the adhesive force. A thin film structure comprises a substrate, one, two or multiple interface modification layers and a metal thin film layer, wherein the interface modification layers are the same or different in material; the substrate is a glass, quartz, lead-containing glass, ceramic, zirconium oxide, aluminum oxide, silicon wafer, mica or plastic substrate; the interface modification layers are made of silicon oxide, aluminum oxide, zirconium oxide, titanium oxide or a compound of two or more of the silicon oxide, the aluminum oxide, the zirconium oxide and the titanium oxide; and the metal thin film layer is made of aluminum, silver, copper, gold and various metal alloys. Each interface modification layer is prepared by CVD, PVD or a chemical method such as a sol-gel method; and the metal thin film layer is prepared by the methods of PVD, CVD or chemical plating and the like. After the interface modification layers are adopted, the adhesion properties of the substrate and the metal thin film layer are obviously improved; the disadvantage that the metal thin film layer easily falls off on the substrate is well overcome; and the photoelectric thin film can be applied to the fields of a photoelectric device electrode, a light reflector or an anti-electromagnetic interference protective layer and the like.

Disclosed are a disperse dye composition, and a preparation method and application thereof. The disperse dye composition comprises a component A composed of one or more of compounds shown as a formula (1) (please see the specifications for the formula), a component B composed of one or more of compounds shown as a formula (2) (please see the specifications for the formula), forbidden aromatic amine compounds, chlorinated phenols, chlorobenzene and chlorotoluene, optional auxiliaries, and other unavoidable impurities. The total content of the forbidden aromatic amine compounds is 10 ppm or below, the respective content of the various chlorinated phenols is 0.5 ppm or below, and the total content of the chlorobenzene and chlorotoluene is 1 ppm or below. The various environment protection indexes of the disperse dye composition meet the requirements of Oeko-Tex Standard 100(2016). In addition, after fabric is dyed through the disperse dye composition, the dyed fabric meets the baby level requirements of Oeko-Tex Standard 100(2016).

The invention discloses a disperse dye composition as well as a preparation method and an application thereof. The disperse dye composition comprises a component A consisting of one or more of compounds shown by formula (1), a component B consisting of one or more compounds shown by formula (2), forbidden aromatic amine compound, chlorinated phenol, chlorobenzene, chlorotoluene, optional accessory and other unavoidable impurities, wherein the total content of the forbidden aromatic amine compound is below 10ppm, the total content of chlorinated phenol of each kind is below 0.5ppm, and the total content of chlorobenzene and chlorotoluene is below 1ppm. The environmental protection indexes of the disperse dye composition meet the requirements of Oeko-Tex Standard 100 (2016); and the properties such as washing fastness after dyeing are excellent. Moreover, by adopting the disperse dyeing composition disclosed by the invention for dyeing, the dyed fabric meets the baby-level requirements of Oeko-Tex Standard 100 (2016).

The invention provides a method for pyrolysis production of anthracite in a coal powder rotary furnace. The method relates to a coal powder dust removing rotary drying furnace system, an external-heating rotary furnace pyrolysis system with a coal gas circulation function, a rotary cooling passivation system with a heat recovery function, and an oil gas recovering system, wherein the coal powder dust removing rotary drying furnace system is used for heating coal powder to 110 to 280 DEG C and removing coal dust of which the particle size is smaller than 0.2 mm; drying water is recovered and fed to a downstream spiral cooling machine to be used for anthracite cooling and humidification; the coal dust obtained after separation is fed to a coal gas generating system to generate fuel, namely coal gas; after dust removing, coal is sent to a downstream rotary pyrolysis system for pyrolysis; high-temperature anthracite is generated, and cooled; the cooled anthracite is passivated at a middle-low temperature; the passivated anthracite is cooled in the spiral cooling machine; water is sprayed on the cooled passivated anthracite for humidification; the humidified anthracite is sent out; high-temperature oil gas produced in the process enters the oil gas recovering system to obtain coal tar, pyrolyzed water and coal gas. Part of the produced pyrolyzed coal gas returns to the pyrolysis furnace after preheating in a circulating manner, while the other part of the produced pyrolyzed coal gas is sent out.

The invention relates to an electroplated amorphous state nickel-based alloy corrosion-resistant wear-resistant oil pipe, and belongs to the field of oil field oil pipes. The inner surface of the oil pipe is electroplated with an amorphous state nickel-based alloy corrosion-resistant wear-resistant protection layer. The thickness of the protection layer is 20-50 microns. The protection layer is electroplated by the steps of oil removing, water washing, acid washing, water washing, activating, deionized water cleaning, electroplating, water washing and thermal treatment. Treatment is performed in oil removing liquid for 5-10 minutes; in acid washing, an oxide film is removed from a sulfur solution till the natural color of metal is exposed; in electroplating, nickel alloy electroplating liquid is adopted, the PH value is adjusted to 2-6 by using nickel carbonate, the temperature is more than or equal to 60 DEG C, the current density is 2-8 A/dm<2>, and the electroplating time is 2 hours; in thermal treatment, the temperature is kept at 200-300 DEG C for 1.5 hours. The oil pipe has the advantages of high microhardness, resistance to acid and alkali corrosion, high wear resistance and long service life.

A porous current collector metal material continuous processing method comprises a to-be-processed long-strip flexible sheet-shaped metal material is allowed to maintain a continuous conveying state in a specific time; an optical fiber laser is utilized to cooperate with galvanometer operation, so that preset positions on the metal material can be controlled to be subjected to perforation processing; followed by, the metal material after perforation is allowed to pass through an acid solution to be subjected to electroetching processing, so that a roughening structure is formed on the surface of the metal material; then the surface of the metal material is subjected to antioxidant processing, so that a coating layer for preventing oxidation is formed and then dried; and finally, the metal material with the surface having the active material is directly rolled up or conveyed to a next procedure.

The invention provides a preparation method of (R)-2-(2,5-difluorophenyl)pyrrolidine or salt thereof. N-protected pyrrolidone and 1,4-difluoro-chlorobenzene are subjected to a Grignard reaction to obtain a compound shown in formula 3; the compound shown in the formula 3 is subjected to deportection and loop closing under an acid condition to obtain a compound shown in formula 4 or salt of the compound; the compound shown in the formula 4 or salt of the compound selectively reduce and synthesize an optical pure compound (R)-2-(2,5-difluorophenyl)pyrrolidine or salt thereof under catalysis ofenzyme, wherein enzyme is recombinant imine reductase and coenzyme circulation is performed by glucose and glucose dehydrogenase. The enzyme is used to replace a chemical chiral reagent, and the problem that chiral inducers are needed in the prior art is solved; compared with metal catalysis, the enzyme catalytic reaction has the characteristics that the cost is low, reaction selectivity is good,the conversion rate and optical purity of the product are high and the reaction process is simple to operate and environmentally friendly, and is applicable to mass industrial production.

The invention relates to a disperse dye composition and a preparation method and application thereof. The disperse dye composition comprises a component A as shown in formula (1), a forbidden aromatic amine compound, chlorinated phenol, chlorobenzene, chlorotoluene, any auxiliary materials and other unavoidable impurities. According to the disperse dye composition, the total content of the forbidden aromatic amine compound is 10ppm or lower, the total content of each chlorinated phenol is 0.5ppm or lower, and the total content of chlorobenzene and chlorotoluene (COCs) is 1ppm or lower. Various environment-protective indexes of the disperse dye composition conform to the requirement of Oeko-Tex Standard 100 (2016), and various performance such as the fold strength, sublimation fastness and the like is excellent. Furthermore, after the disperse dye composition of the invention is used for dyeing a fabric, the dyed fabric conforms to the requirements of a baby level of the Oeko-Tex Standard 100 (2016). (Shown in the description).

The invention provides a preparation method of (R)-2-(2,5-difluorophenyl) pyrrolidine or salt thereof. N-protected pyrrolidone and a 2,5-fluorophenyl magnesium chloride Grignard reagent are subjectedto a Grignard reaction, and a compound represented as the formula 3 is obtained; the compound represented as the formula 3 is subjected to deprotection and ring closure under the acidic condition, anda compound represented as the formula 4 or salt of the compound is obtained; under enzyme catalysis, formic acid or formate is utilized as a hydrogen donor, a cofactor is adopted, cofactor cycle is realized, and the compound represented as the formula 4 or the salt of the compound is selectively reduced to synthesize an optically pure compound, namely, (R)-2-(2,5-difluorophenyl) pyrrolidine or the salt thereof; enzyme is a combination of recombinant imine reductase and formate dehydrogenase, and the cofactor is oxidized/reduced type nicotinamide adenine dinucleotide phosphate or oxidized/reduced type nicotinamide adenine dinucleotide. The method is safe in process and simple to operate, and yield and optical purity of a product are both higher.

The invention relates to a multifunctional crude oil tank farm treating agent which is prepared by the following raw materials in percentage by weight: 55%-65% of a modified polyether demulsifying agent, 10%-15% of a synergist, 3%-5% of a dispersant and 20%-30% of a solvent, wherein the modified polyether demulsifying agent is one or a plurality of nonyl phenolic resin polyether, nonyl phenol aldehyde resin polyether, tertiary butyl phenolic resin polyether and tertiary butyl phenol amine aldehyde resin polyether polymerized by nonyl phenol, m-dinonylphenol or p-tert-butylphenol as an initiator, or a condensation product of the nonyl phenol, the m-dinonylphenol, the p-tert-butylphenol, vinylamines and methanal as the initiator with propylene epoxide and ethylene oxide; the synergist is a non-ionic surface active agent; the dispersant is polyacrylic acid or polyacrylamide; and the solvent is one or a plurality of diethylene glycol monobutyl ether, terpene or naphtha. The multifunctional crude oil tank farm treating agent is suitable for pretreating of various types of temporary stored or long-term stored crude oil entering the tank farm. A product has oil solubility, and the usage amount is low.

The invention provides a treatment method of a citric acid contained solution, wherein the method comprises the following steps of: (1) enabling the citric acid contained solution to flow through an active carbon column and contact active carbon in the active carbon column so as to obtain an effluent liquid A, wherein the light transmission rate of the effluent liquid A is more than 60% through the contacting condition; (2) regulating the pH value of the effluent liquid A obtained in the step (1) to be 2-5 so as to obtain a solution B; and (3) enabling the effluent liquid B to contact multiple anion exchange resin column groups so as to carry out ion exchange chromatography separation, wherein each anion exchange resin column group passes through an adsorption area, a purification area, an elution area and a regeneration area in sequence in circulation so that the anion exchange resin column group is exchanged, adsorbed, purified, eluted and regenerated in sequence in circulation. The citric acid contained solution is treated by using the method provided by the invention so that citric acid with high purity and high yield can be obtained within a unit time in an environment friendly and energy saving way.

The invention discloses a method and device for applying methane to an industrial hating furnace. The device comprises a methane tank (4) and a heating chamber (3), wherein the methane tank is communicated with a bucket (2); the methane tank is connected with a methane storeroom (16) through a delivery pipe (9); the methane storeroom is connected with a flame gun (12) positioned in the industrial heating furnace through an output pipe (15); the output pipe is connected with an air compression pipe (13); and the heating chamber is connected with a hot air discharging pipe (25) in the industrial heating furnace through a hot air pipe (10). By utilizing the device, a fermentation material is filled in the methane tank firstly, the methane tank is heated to 50-80 DEG C so that the fermentation material is fermented and decomposed at high temperature to generate methane, then the methane is stored and delivered to the industrial heating furnace so as to be ignited, and then compressed air is introduced to the methane so that the methane sufficiently combusts in the industrial heating furnace after being mixed with the compressed air. By utilizing the method and device provided by the invention, the quality of the combusted product can be ensured, the gas cost can be greatly reduced, energy sources are saved, waste materials are sufficiently utilized, and the environmental pollution is reduced.

The invention provides a preparation method of citrate. The method comprises the following step of: undergoing a contact reaction on citric acid and monohydric alcohol in the presence of a catalyst to obtain citrate, wherein the citric acid is citric acid containing one or more of Fe<3+>, Al<3+> and Cu<2+> prepared with at least one of the following methods: in a method I, a clear citric acid zymotic fluid is separated and purified with a calcium salt method to obtain the citric acid containing one or more of Fe<3+>, Al<3+> and Cu<2+>; and in a method II, a clear citric acid zymotic fluid is separated and purified with a chromatography to obtain the citric acid containing one or more of Fe<3+>, Al<3+> and Cu<2+>. By adopting the method disclosed by the invention for preparing the citric acid, the procedure can be simplified, the dosage of a catalyst can be reduced, and the yield and purity of the citrate are increased.

The present invention discloses method of cyclically utilizing phenol containing waste water in phenolic epoxy resin production. Phenol containing waste water produced in the phenolic aldehyde condensation reaction during phenolic epoxy resin production is decompression distilled to dewater in the vacuum degree higher than -0.09 MPa; the phenol-water azeotrope distilled out at the kettle temperature higher than 80 deg.c is condensed and reused as partial condensed material; and the phenol-water azeotrope distilled out at the kettle temperature higher than 80 deg.c is condensed and reused as the technological water for the condensation reaction before being rectified in the waste water rectifying tower. The tower top exhausted water contains phenol less than 2000PPM and the tower bottom recovered phenol solution has concentration of 60-90 %. The method results in lowered phenol consumption, less exhausted waste water and lowered waste water treating cost.

The invention discloses a green synthesis method of dibenzothiazole disulfide as a rubber vulcanization accelerator, and belongs to the technical field of chemical engineering. The green synthesis method specifically comprises the following steps: completely dissolving 2-mercaptobenzothiazole in a sodium carbonate aqueous solution, then dropwise adding hydrogen peroxide, feeding carbon dioxide toadjust the pH of a system, and carrying out oxidation to generate dibenzothiazole disulfide and sodium bicarbonate. A sodium carbonate solution formed by heating the obtained sodium bicarbonate solution can be used for dissolving the raw material 2-mercaptobenzothiazole so as to realize circulation of the raw materials. The purity of the product prepared by the method can reach 99% or above. Compared with a traditional mixed acid oxidation method, the green synthesis method has the advantages that a large amount of salt-containing wastewater is reduced, and the process is environmentally friendly.

The invention provides a wet harmless extraction process for metal in a waste mobile phone circuit board. The wet harmless extraction process solves the problem of metal recovery in the waste mobile phone circuit board in the prior art, and comprises the following steps that the waste mobile phone circuit board is disassembled into an IC chip, a surface mounted device and a light panel, a low-toxicity and environment-friendly leaching agent is developed, tin, copper silver and gold palladium are directionally and selectively leached by adopting a step-by-step method, and then tin, copper silver and gold palladium are reduced and extracted, the recovery rate of gold, silver and palladium reaches 95% or above, a suitable stripping agent is selected for stripping a gold plating on the light panel. According to the wet harmless extraction process, and various process units do not generate pollutants such as nitrogen oxide, sulfur dioxide and other countries strictly controlled by the totalamount, so that environmental pollution is reduced from the source.

The invention discloses a disperse dye composition as well as a preparation method and application thereof. The disperse dye composition contains a component A, a prohibited aromatic amine compound, chloridized phenol, chlorobenzene and chlorotoluene, optional auxiliaries and other inevitable impurities, wherein the component A contains one or more compounds of formula (1) as shown in the specification. Various environment-friendly indexes meet the requirements of Bluesign, in addition, the single contents of the prohibited aromatic amine compound (AZO), the chloridized phenol (CPs) and the chlorobenzene and chlorotoluene (COCs) and the total content of the chlorobenzene and chlorotoluene in the chemical product of the disperse dye composition are low. In addition, after being dyed, a fabric can meet infant-grade requirements of Oeko-Tex Standard 100 (2016). Sewage generated after dyeing can also meet environment-friendly requirements, and meanwhile, the disperse dye composition can be relatively convenient, rapid and safe to use.