56results about How to "Great potential for industrialization" patented technology

The invention discloses a method for producing ethanol by high-efficiency simultaneous saccharification and cofermentation, which comprises the following steps: pretreating; concentrating and detoxifying; preparing yeast seed solution; performing simultaneous saccharification and cofermentation; and distilling/rectifying. When the method provided by the invention is used, the inhibition action of a monosaccharide component formed by hydrolysis of cellulose on cellulose is relieved, the enzymolysis saccharification efficiency and fermentation yield are improved, the recovery rate of hemicelluloses in bagasse is about 60 percent, the cellulose recovery rate is about 86 percent, and the total ethanol yield of dry bagasse can reach about 20 percent.

The invention discloses a method for efficiently synthesizing alpha-amino-acid ester, which comprises the following steps: by using alpha-eleostearates and benzyl amine as raw materials and triethylamine as a catalyst, ammonifying alpha-eleostearates in different structures by a one-pot method under the action of the catalyst; and carrying out after-treatments, including hydrolysis, extraction, column chromatography and the like, to obtain the alpha-amino-acid ester. The maximum reaction yield is up to 95%. In view of the advantages of wide substrate applicability, mild reaction conditions, simple operation and high yield in the method disclosed by the invention, the invention has certain potential industrial application value.

The invention relates to a self-supported attapulgite nanofiber membrane, and a preparation method thereof. The self-supported attapulgite nanofiber membrane is a nanofiber membrane with a three-dimensional net structure, and is formed via combination of attapulgite with a water-soluble polymer. The preparation method comprises following steps: attapulgite colloid and a solution of the water-soluble polymer are mixed and concentrated so as to obtain a mixed slurry; the mixed slurry is subjected to suction filtration so as to obtain a membrane; and the membrane is dried, and is subjected to step sintering in an inert atmosphere so as to obtain the finished product. The self-supported attapulgite nanofiber membrane possesses uniformly distributed nano-scaled pores and chemical corrosion resistance, is high in mechanical strength, and excellent in adsorption performance, and can be applied to the field of ultrafiltration.

The present invention belongs to the field of biological engineering, and specifically discloses high-quality D-acetylglucosamine deacetylase heterologous expression and application. The amino acid sequence of the D-acetylglucosamine deacetylase is as shown in SEQNO. 1. Through enzymatic activity measurement and substrate specificity analysis, the D-acetylglucosamine deacetylase is strong in substrate specificity, and in the substrate for researches, D-acetylglucosamine (GlcNAc) and beta-bonded D-acetylglucosamine (GlcNAc) are deacetylated targetedly to generate D-glucosamine (GlcN) or beta-bonded glucosamine (GlcN). Recombinant D-acetylglucosamine deacetylase is expressed by use of genetic engineering cloning, the D-acetylglucosamine deacetylase can be strongly expressed, and high-quality D-acetylglucosamine deacetylase can be obtained.

The invention discloses a method for purifying a metal material under a temperature difference. According to the method, a metal material to be purified and a degassing agent are placed into a closed system and the inner part of the closed system is vacuum or is in an appropriate atmosphere; a certain distance is kept between a raw material and the degassing agent to heat under the temperature difference; in the heating process, impurities enter the closed system from the metal material to be purified and then are absorbed by the degassing agent. The method for purifying the metal material under the temperature difference has low requirements on a geometric dimension of the metal material, original impurity content and vacuum degree, is low in cost and high in efficiency, and has a great potential for realizing industrialization.

The invention discloses a hydroformylation homogeneous catalytic reaction method and a catalyst for preparing 3,5,5-trimethylhexanal from a mixture of 2,4,4-trimethyl-1-pentene and 2,4,4-trimethyl-2-pentene. The method and the catalyst are characterized in that a rhodium compound is used as a metal precursor of the catalyst; biphenyl tridentate and tetradentate phosphoramidite ligands are used asligands (frameworks I and II) of the catalyst to form a rhodium/polydentate phosphoramidite ligand catalytic system; a ratio of synthesis gas CO to H2 is 1: 1, a reaction temperature is 70-140 DEG C,a reaction pressure is 1-8 MPa, and a reaction lasts for 4-20 hours; and thus, 3,5,5-trimethylhexanal(isononaldehyde) is prepared from a C8 olefin mixture through a one-step reaction.

The invention belongs to the technical field of waste polymer carbonization, particularly relates to a polyolefin carbonization method, and more particularly relates to a method for promoting low-temperature and green carbonization of waste polyolefin by using biomass. The method comprises the steps: a mixture of polyolefin and biomass is heated in an oxygen-containing atmosphere, and undergoes acarbonization reaction, wherein the polyolefin is subjected to a reaction with oxygen under heating conditions, an oxygen-containing intermediate cross-linked structure is formed and is subjected to acondensation and/or polymerization reaction with an intermediate product containing hydroxyl and/or oxygen free radicals and formed in the carbonization process of biomass, to form a cross-linked structure, so that the breakage of a polymer main chain is inhibited, the carbonization of polyolefin is promoted, and an amorphous carbonized product is formed. Compared with a traditional carbonizationprocess, the method has the advantages that the energy loss is greatly reduced, the problem that polyolefin is difficult to carbonize under the condition of no catalyst is innovatively solved, and afeasible new technology is provided for large-scale recycling of waste polyolefin in the future.

The invention provides a process for preparing substitute liquefied natural gas (LNG) with coke-oven gas. The process is characterized by subjecting the coke-oven gas to direct two-stage methanation reactions on a supported molybdenum-based sulphur-tolerant methanation catalyst after removing the impurities such as oil, naphthalene, benzene and the like from the coke-oven gas, then carrying out clean reaction through two-stage Ni-based methanation reactions after ferric oxide coarse desulfurization and activated carbon fine desulfurization, and finally separating the impurities such as N2, H2, H2O and little CO2 through subzero liquefaction, thus obtaining the LNG product with methane content higher than 97%. The process has the advantages of simple process flow, small equipment investment, low comprehensive energy consumption and excellent natural gas products.

The invention relates to a positive electrode composite material for a lithium primary battery and a preparation method thereof. Aiming at the problems that the energy density and the high-rate performance of the lithium primary battery cannot be simultaneously realized, and the heat production is serious when the lithium primary battery is used under a high-rate working condition, a multi-layer composite structure of a non-lithium-containing positive electrode material is designed and developed, and the high specific energy of the lithium primary battery is realized through the multi-electron transfer reaction of active substances in the structure; and meanwhile, an electrode active material is used for coordinating and continuing a discharging strategy, so that the self-discharging weakness of the composite positive electrode is compensated, the discharging rate performance is improved, and the discharging of a synergistic interaction mechanism is realized. The lithium primary battery positive electrode composite material is prepared from fluoride and an oxygen group element material simple substance or compound through spray heat treatment, and the fluoride is composed of porous hollow spherical particles formed by fluorinated metal coated with carbon fluoride. According to the prepared composite positive electrode material, the specific discharge energy and specific power of a lithium primary battery are remarkably improved, and the specific discharge energy of the prepared lithium primary battery at the 20-hour rate is greater than 800 Wh/kg.

The invention provides a method for preparing 3,4-dihydrobenzo[b][1,4]oxazine derivatives. The method comprises the following step: carrying out reduction reaction on [b][1,4]oxazines in the presence of hydrogen gas by using B(C6F5)3 as a catalyst to obtain the mixture containing the 3,4-dihydrobenzo[b][1,4]oxazines disclosed as Formula I. Benzo[b][1,4]oxazines in different structures are used as a substrate to synthesize the benzo[b][1,4]oxazines at high yield by using the B(C6F5)3 as the catalyst. The method has the advantages of cheap and accessible raw materials, high reaction activity, no participation of transition metals and wide substrate application range, and has huge industrialization potential.

The invention discloses a nano cellulose and a preparation method thereof. The water contact angle of the nano cellulose is smaller than 20 degrees. The method prepares the nano cellulose in an organic acid system, and at least comprises the following steps: (1) reacting a cellulose raw material with an organic acid solvent and water to obtain a solid reactant, and washing the solid reactant to beneutral; and (2) drying the obtained solid reactant to obtain the nano cellulose. According to the method, the organic acid is adopted to hydrolyze the cellulose to prepare the nano cellulose, the operation is simple, the reaction conditions are mild, the energy consumption is low, the separated and recycled reaction solution can be recycled, the environmental pollution is reduced, and a new pathfor industrial production of the nano cellulose is provided.

The invention provides a lubricating oil biodegradation accelerant and a preparation method thereof. The lubricating oil biodegradation accelerant is a compound shown as a formula I, wherein X is phosphorus or boron, R1 is one or more of methyl, isopropyl, 2-methyl propyl, 1-methyl propyl, benzyl and hydrogen, and R2 is selected from C8-C18 alkyl. When the compound as shown in the formula I is used as a biodegradation accelerant, the biodegradation rate of lubricating oil can be effectively increased. The compound is low in synthesis raw material price, mild in reaction, suitable for large-scale industrial production and good in industrial development potential.

The invention provides a synthesis method of an oxazolidinedione compound represented by formula (I) shown in the specification. The method comprises steps as follows: a compound represented by formula (II) shown in the specification, a compound represented by formula (III) shown in the specification and a compound represented by formula (IV) shown in the specification have a reaction in a solvent in the carbon dioxide atmosphere in the presence of a catalyst, a base and an aid, so that the oxazolidinedione compound represented by formula (I) is obtained; R1 and R2 are H, C1-C6 alkyl groups, C1-C6 alkoxy groups or halogens respectively and independently. According to the method, the good technical effect is realized through combination and cooperation of proper catalyst, base, aid and solvent systems, and the method has very broad market application prospect in the field of drug intermediate synthesis.

The invention relates to the technical field of organic chemical synthesis, and in particular, relates to a synthetic method of a fluorene fluoride compound, wherein the synthetic method of the fluorene fluoride compound comprises the following steps: S1, adding an organic solvent into a reaction kettle, adding a compound represented by a formula (I) and a fluorinating agent into the reaction kettle, and uniformly stirring and mixing; S2, sequentially adding an auxiliary agent and a reaction solvent into the mixture obtained in the step S1; and S3, setting the reaction temperature and the reaction time of the reaction kettle, continuously stirring while reacting, naturally cooling the product to room temperature after the reaction is completed, filtering, fully washing with a saturated sodium carbonate aqueous solution, adding chloroform, extracting for 2-3 times, merging organic phases, drying with anhydrous sodium sulfate, concentrating under reduced pressure, enabling the obtained residue to pass through silica gel column chromatography, and leaching the mixed solution of acetone and petroleum ether to obtain a compound represented by a formula (II). According to the method, thefluorinating agent, the auxiliary agent and the reaction solvent are comprehensively selected and cooperated, so that the target product can be obtained at high yield.