240results about How to "The production process is safe and environmentally friendly" patented technology

The invention discloses a method for preparing carbon and producing a controlled-release fertilizer by utilizing crop straws and the controlled-release fertilizer prepared by using the method, solving the problem that the straws can not be effectively utilized. The method mainly comprises the three steps of straw granulation, combustion carbon discharge and fertilizer preparation. By using the method, batch processing and effective utilization are carried out on the straws; the method is easy to grasp, has strong environmental suitability and is suitable for large-scale popularization and usein countries; by using the method, carbon can be prepared from the straws and then is used for preparing the fertilizer and the straws can also be prepared into biomass fuel for use; and production process is environmentally-friendly, thereby achieving cyclic utilization of energy and relieving the critical conditions of fertilizers and fuels in countries.

The invention discloses a method for preparing tungsten diselenide nano sheets, comprising the following steps of: evenly mixing tungsten powder and selenium powder in a certain mol ratio; heating and reacting the mixture under protection of argon, and cooling to obtain the tungsten diselenide nano sheets. The tungsten diselenide nano sheet is of an inorganic nano sheet laminated structure; the tungsten diselenide nano sheet has excellent dispersion performance and friction performance in base oil and polymer compounds; the tungsten diselenide nano sheet is simple in preparing method, safe, environment friendly, high in production rate, low in cost and suitable for large-scale industrial production.

The invention discloses a method for producing a furan ammonium salt by using furoic acid. The method comprises the following steps of: (1) chlorination: putting furoic acid and chlorohydrocarbon solvent into an enameled glass reaction kettle, controlling temperature and time, and obtaining a furoyl chloride product; (2) cyanation: putting the furoyl chloride and sodium cyanide into the reaction kettle, stirring, preserving heat, reducing pressure, and reclaiming the solvent to obtain a furoyl nitrile product; (3) hydrolysis: heating the furoyl nitrile and hydrochloric acid, and obtaining furan ketone acid after the reaction is finished; (4) condensation: adding ethyl acetate extract of the furan ketone acid serving as the hydrolysis product into the reaction kettle, dropping methoxyamine to perform room temperature reaction with the hydrolysis product, and demixing, wherein the oil layer is used for ammoniation reaction; and (5) ammoniation: introducing ammonia gas into the oil layer reactant, controlling the temperature, stirring, finishing gas introduction, centrifuging, and drying to obtain the furan ammonium salt. The method is simple and convenient, is convenient to operate, reduces the production cost, improves the yield, makes full use of raw materials, and is safe and reliable in the production process.

The invention discloses a preparation method of a tin antimony oxide nano-powder. The method comprises the following technical steps: (1), dissolving inorganic tin salts and inorganic antimony salts in diluted hydrochloric acid and gradually adding an alkali solution to the diluted hydrochloric acid in the stirring process until tin ions and antimony ions are completely deposited, so as to obtain a tin hydroxide and antimony hydroxide precursor; (2), filtering, separating and washing the tin hydroxide and antimony hydroxide precursor; (3), adding water and a dispersing agent to the tin hydroxide and antimony hydroxide precursor; and after uniformly stirring, continuously stirring and reacting the tin hydroxide and antimony hydroxide precursor in a hydrothermal reaction kettle at the temperature of 150-250 DEG C so as to obtain a nanometer paste; and (4), after separating and drying the nanometer paste, calcining the nanometer paste and crushing the nanometer paste by airflow so as to obtain the tin antimony oxide nano-powder. Through adoption of the preparation method disclosed by the invention, requirements of production process on equipment are effectively reduced; and a nanometer material with high performance and high purity is obtained.

The invention discloses a solid lubricating oil additive MoSe2 nanosheet and a preparation method thereof. Molybdenum powder and selenium powder are used as main raw materials to directly prepare the solid lubricating oil additive MoSe2 nanosheet through one-step solid phase reaction. The method of the invention has the advantages of easy acquisition of raw materials, low cost of raw materials, simple preparation technology, easy control of parameters and safe and environment-friendly production processes, and is especially suitable for large-scale industrial production. The solid lubricating oil additive MoSe2 nanosheet prepared by the method of the invention has the advantages of good crystallization, high purity and excellent lubricating property.

The invention discloses a copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and a preparation method of the copper-based electric contact material and belongs to the technical field of metal matrix self-lubricating materials. Firstly, graphene serves as the base, sodium molybdate serves as a molybdenum source, thiourea serves as a sulfur source, hydroxylamine hydrochloride serves as a reduction agent, cetyltrimethyl ammonium bromide (CTAB) serves as a surface active agent, and a graphene / molybdenum disulfide heterojunction material is compounded through a hydrothermal method according to a certain proportion; and then copper powder serves as a matrix, and through the matching with heterojunction materials of different proportions, the copper-based electric contact material is obtained by means of a powder metallurgy technique through mixing, cold pressing and vacuum sintering. According to the copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and the preparation method of the copper-based electric contact material, the excellent mechanical properties and electrical properties of graphene as well as the characteristic of small density are utilized, through the cooperation of the excellent lubricating property of molybdenum disulfide, the hardness and the lubricating property of the material are improved while guaranteeing the conductivity of the composite material, and the specific gravity of the material is reduced; and in addition, the technique is simple, the cost is low, and the obtained composite material has great development prospects in the aspect of self-lubricating electric contact.

The invention provides a powdery casting coating as well as a preparation method and a use method thereof. The powdery casting coating provided by the invention is composed of the following components in percentage by weight: 89-92% of refractory aggregates, 2.6-3.6% of sodium bentonite, 0.64-1.3% of rosin, 0.58-0.75% of polyvinyl butyral, 0.15-0.25% of hydroxypropyl methyl cellulose, and 4.0-5.1% of water. The powdery casting coating provided by the invention is alcohol-free, and capable of being mutually infiltrated and fused with alcohol in use to obtain a qualified coating.

The invention discloses a preparation method of a tungsten diselenide nano-clathrate. The preparation method is as follows: tungsten powder and selenium powder which are in a certain molar ratio and graphite are used, absolute alcohol is added to prepare raw material mixture, the mixture is processed to form paste, and the paste performs solid-phase synthesis under a certain condition to obtain the tungsten diselenide nano-clathrate with a core-shell structure. The product has uniform size and large specific surface area; the product still has good mechanical properties and wear resistance under extreme conditions such as high temperature and high pressure and has good dispersibility in macromolecular composite and other composites; and the product is a lubricating material with good performance, has simple preparation process, controllable parameters and safe and environmentally friendly production process and is particularly suitable for large-scale industrial production.

The invention relates to a method for manufacturing nano antimony doped tin oxide, which comprises the following steps of: performing complete thermal decomposition on a mixture of organic precursor tinoxalate of a tin and an antimonial substance at 250 to 800 DEG C; oxidizing and baking the rough product of the antimony doped tin oxide after the thermal decomposition at 800 to 1,500 DEG C for 15 to 90 minutes after completely and uniformly stirring the rough product to obtain the blue nano antimony doped tin oxide. The method avoids toxic hazardous chemical, such as chlorine and nitric acid, and a combustible and explosive organic solvent, so no pollutant is discharged in the whole production process. The method has the advantages of simple process and equipment, safe and environmentally-friendly production process and low production cost, and creates conditions for the industrial production with safety and low cost.

The invention discloses a preparation method of a lithium ion battery anode material lithium fluoborate. The preparation method comprises the following steps: (1), mixing a lithium source, an iron source, a boron source and a chelating agent according to the condition that the molar ratio of Li, Fe, B and C is (1-1.05):1:1:(0.5-1.5), adding the mixture into water for dissolving, and controlling the concentration of metal ions at 0.1-0.8mol / L<-1> to obtain liquor; (2), stirring in constant-temperature water bath to form sol; (3), stewing at the constant temperature to form gel; (4), adding water into the gel, and stirring; (5), spraying and drying to obtain a precursor; (6), sintering the precursor for 1.5 hours-2.5 hours at 250 DEG C-350 DEG C in a non-oxidizing atmosphere, then, heating up to 450 DEG C-550 DEG C, sintering for 5 hours-12 hours, and naturally cooling to the room temperature, thereby obtaining LiFeBO3. According to the preparation method disclosed by the invention, material resource is extensive, the operation is simple, convenient and easy to implement, the controllability is strong, the sintering temperature is low and the production cost is low.

The invention discloses a biogenic pesticide containing xanthoxylin and abamectin and a preparation method thereof. The biogenic pesticide is used for killing insects; and the biogenic pesticide containing the xanthoxylin and the abamectin is formed from the following components in parts by weight: 0.01-12.9 parts of the xanthoxylin, 0.1-10 parts of the abamectin, 0.5-5 parts of a synergist, 0.1-5 parts of a sterilizing agent, 1-20 parts of an emulsifying agent, 1-30 parts of plant oil, 1-8 parts of an anti-freezing agent, 0.1-2 parts of a thickening agent and 20-70 parts of water. According to the biogenic pesticide disclosed by the invention, any chemical solvent does not need to be added into effective components of the biogenic pesticide; the water-based preparation can be widely applied to prevention and treatment of insect pests of places with relatively concentrated people, such as parks, green lands, streets, and family gardens; and the biogenic pesticide is also applicable to the prevention and the treatment of fowl and livestock fur injurious insects. A production process of the xanthoxylin does not use an organic solvent; and extracted pepper fruit waste dregs are composted and fermented and are returned back to fields to be used as a base fertilizer to be applied. In the whole product production process, the energy consumption is low, and equipment investment is small and the occupying area is small; and sources of raw and auxiliary materials are wide and are easy to obtain.

The invention provides silane modified polylactic acid as well as a preparation method and application thereof. The silane modified polylactic acid can be used for preparing an adhesive with degradability. The invention provides a preparation method of the silane modified polylactic acid, which comprises the following steps: (1) reacting polyether polyol with lactide to prepare polylactic acid polyol; (2) reacting the polylactic acid polyol prepared in the step (1) with an epoxy compound to prepare low-acid-value polylactic acid polyol, and (3) reacting the low-acid-value polylactic acid polyol prepared in the step (2) with alkoxy silane containing isocyanate groups to prepare the silane modified polylactic acid.

The invention discloses an efficient non-toxic pesticide which is characterized by comprising the following raw materials by weight: 5-12 parts of rheum officinale, 8-18 parts of pepper, 5-10 parts of garlic, 3-6 parts of rhizoma polygonati, 6-8 parts of matrine, 4-8 parts of copper nitrate, 2-5 parts of acetic acid, 3-5 parts of chitin and 8-20 parts of water. The invention provides the efficient non-toxic pesticide and its preparation method, the efficient non-toxic pesticide is non-toxic and harmless to people and livestock, is non-pollution to the environment and crops, and is safe to use, and the pesticide efficacy lasts for a long time.

This invention discloses a method for producing laccase by fungi co-culture. The method comprises: inoculating the suspension of Trametes sp. AH28-2 into a fermentation culture medium, culturing at 22-37 deg.C for 1-4 days, adding the suspension of Trichoderma sp. ZH1, culturing for 5-10 days, and separating to obtain laccase agent with living laccase content 6,000 U / L. The culture medium is liquid culture medium, and mainly comprises certain amounts of carbon source, nitrogen source, phosphates of potassium and sodium, sulfates of copper and iron, adenine and vitamin B. The method avoids aromatic compounds and heavy metal ions to induce, thus is safe and environmentally friendly, and has high and stable laccase activity.