52results about How to "Has industrial practical value" patented technology

The invention discloses a supported ruthenium catalyst and a preparation method thereof. The preparation method is characterized in that the preparation method comprises the following steps: 1, preprocessing a carrier with a soluble alkaline earth metal salt, wherein the mass of the soluble alkaline earth metal salt accounts for 0.1-20% of the mass of the carrier; and 2, dipping the alkaline earth metal salt processed carrier with a material which comprises a primary active component metallic ruthenium and an assisted catalytic component comprising one or several of Ni, Co, Pd and Pt, wherein the mass of the primary component metallic ruthenium accounts for 0.1-5% of the carrier, and the mass of the secondary component comprising one or several of Ni, Co, Pd and Pt accounts for 0.01-5% of the mass of the carrier. The catalyst of the invention is mainly applied to the selective hydrogenation process of an aromatic ring of an aromatic compound, wherein the aromatic ring of the aromatic compound has at least one alkyl group, one ester group, one hydroxyl group or an amino group and also has at least one C1-8 alkyl group. Compared with catalysts prepared with the prior art, the catalyst of the invention has the advantages of low cost, simple preparation method, high activity, good selectivity, high safety in the operation of the aromatic ring hydrogenation, realization of the operation of the aromatic ring hydrogenation under a low pressure, and good economy.

It is an L-leucine high-yield bacterium and the production of L-leucine with invoice method, belonging to biological engineering field. The invented bacterial is a corynebacterium glutamicum JH-27, using corynebacterium glutamicum ATCC13032 as starting strain, mutagenizing separately with diethyl sulfate, nitrosoguanidine and ultraviolet, adding separately analogue of branched chain amino acid into minimum medium and sulfaguanidine into complete medium and breeding to prepare, being an L-leucine high-yield bacterium resistant sulfaguanidine and branched chain amino acid, compared with starting strain, producing L-leucine with the strain and invoice method, it expresses the ability of accumulation of highly qualified L-leucine. Shaking flask and culturing JH-27 for 60 hours, the yield of L-leucine is 30-32 g/l. Fermenting in fermenter of 5L for 55 hours, the yield of L-leucine is 40g/l.

The invention discloses a preparation method of a cast nylon composite material with a high friction-reducing and anti-wear surface layer. The preparation method comprises the following steps of: preparing dispersive suspensoid by hexamethylphosphoramide, ultra-fine kaolin and toluene diisocynate in proportion; adding dispersive suspensoid and teflon micro powder to a caprolactam melt; initiating caprolactam anionic ring-opening polymerization through a sodium hydroxide-toluene diisocynate catalytic activating system; casting a reaction mass into a preheated and heat-preserved centrifugal rotating die under normal pressure; after the reacting and casting liquid is polymerized, solidified and formed, gradually cooling and demoulding, thus obtaining the cast nylon composite material with the high friction-reducing and anti-wear surface layer. The prepared cast nylon composite material has the characteristics that an inner matrix and an outer surface layer are different in structure and performance, so that the requirements on manufacturing and using various pulleys, idler wheels, rope wheels and guide wheels for a transportation mechanism, a hoisting device and mine equipment can be met.

The invention discloses an event extraction and processing method for case-following electronic files. The method comprises the following steps: step 1, acquiring required file data from a case-following electronic file circulation processing platform and storing the required file data into a database; 2, constructing an event trigger word dictionary, matching an electronic file event descriptionparagraph, and performing text preprocessing methods such as sentence segmentation, word segmentation and part-of-speech tagging; 3, event attribute extraction: combining dependency syntax analysis and a semantic role labeling method to obtain six event attributes including an applicant, a susceptor, a behavior, time, a place and a mode of an event; and step 4, event aggregation: aggregating the atomic events into topic events, combining similar topic events, and storing the topic events into an event database. According to the method, the problem that crime fact information is rapidly obtained by the case-following electronic file is solved, event extraction and organization can be more accurately carried out on crime facts, and the method is a basis for efficient and high-quality paper marking.

The invention relates to an asymmetric synthesis method for (S,S)-2,8-diazabicyclo[4,3,0]nonane. N-benzyl-butene imidodicarbonic diamide is taken as a raw material, in presence of a chiral squaramidecatalyst (III), the N-benzyl-butene imidodicarbonic diamide and N-para-toluene sulfonyl-N'-propylene imidogen hydrazine (II) are subjected to an asymmetric [2+4] addition reaction, and 8-benzyl-2-para-toluene sulfonamide-7,9-dioxo-(1S,6R)-2,8-diazabicyclo[4,3,0]-3-alkene nonane is obtained; through the steps of recrystallization, reduction, acid-catalyzed hydrolysis and reduction, the (S,S)-2,8-diazabicyclo[4,3,0]nonane is obtained. The synthesis method is simple, the yield of the asymmetric catalysis product is high, the enantioselectivity of the product through recrystallization can reach 90% or above, and the asymmetric synthesis method is mild in condition, simple to implement, low in production cost and capable of being used for industrialized production.

The invention discloses a method for improving the conversion rate of aniline in synthesis of diphenylamine. The method comprises the following steps: simultaneously introducing aniline and isopropanol into a reactor according to a ratio of 1: (0.4-0.6), and carrying out a reaction under catalysis of a beta zeolite molecular sieve, wherein the concrete reaction conditions are as follows: the reaction pressure is 1.5 to 6.0 MPa; the reaction temperature is 250 to 300 DEG C; and the volume space velocity of aniline is 0.1 h-1 to 0.5 h-1. According to the invention, through selecting a proper catalyst and optimizing reaction conditions, and on the basis of guaranteeing the reaction of synthesizing diphenylamine from aniline, the reaction of synthesizing isopropylamine from isopropanol can be performed in a certain extent, so two reactions are coupled, and the effects of improving the conversion rate of aniline and eliminating environmental pollution are achieved. Combined production of isopropylamine can be realized on an original device used for synthesizing diphenylamine from aniline, so the economy of the device is increased; and separation of an obtained product can be completed through conventional rectification, and industrial practical values are obtained.

The invention relates to a chemical raw material and a preparation process thereof and particularly relates to a method for increasing high-temperature reaction preparation efficiency of a complex inorganic color pigment (CICP). The invention develops a convenient and simple method for increasing high-temperature reaction preparation efficiency of a CICP in order to overcome defects of high temperature, long time consumption, high energy consumption and high dust content in the sintering preparation process of the traditional CICP. Due to the adoption of the method, the sintering temperature of the CICP can be effectively reduced, the sintering time can be shortened, the process energy consumption can be reduced, and the flying dust generated in the process can be relieved.

The invention discloses a preparation method of a biological packaging film based on bacterial nanocellulose. The bacterial nanocellulose obtained by fermenting gluconacetobacter xylinum screened by mutagenesis, starch, sorbitol and glycerol are used as basic raw materials; water is added for mixing to prepare a film forming solution, bioactive components are added after further gelatinization, and the biological packaging film is obtained after coating and airing. According to the invention, the BC dosage can be greatly reduced, the biodegradability and edibility of the film are maintained, and the biological function is enhanced; the prepared packaging film not only has good strength, tensile strength, biodegradability, antibacterial function and other biological activity functions, butalso has high cost performance and large food packaging application range, and lays a solid foundation for realizing commercial application of BC packaging films.

The present invention discloses a photocurable composition and uses of the photocurable composition as varnish and colored paint. The photocurable composition comprises at least a photoinduced alkali production agent represented by a general formula I, at least a polyisocyanate compound and at least a poly mercapto compound, wherein in the general formula I, R is C1-C8 alkyl, phenyl, C1-C4 alkyl and C1-C4 alkoxy substituted phenyl or a group defined in the specification, X is a straight bond, O or S, or R-X is defined in the specification, and n is 1 or 2. According to the present invention, the photoinduced alkali production agent having the specific structure is used, such that the UV lamp irradiation time required by the composition curing is short, the activity of the light-producing alkali is high, the alkali catalyzing is fast, the cross-linking curing is completed in a short time, the remarkably improved curing efficiency is provided, the application period is not affected, and the industrial practical value is provided.

The invention relates to an asymmetric synthesis method of L-carnitine. Acetyl chloride (II) generates ketene in situ at a low temperature under the catalysis of organic base, the ketene and 2-chloroacetaldehyde (I) are directly subjected to an asymmetric intermolecular [2+2] cycloaddition reaction without separation in the presence of Lewis acid and a chiral catalyst to obtain chiral lactone, andlactone (IV) is reacted with a trimethylamine solution to obtain L-carnitine with high enantioselectivity. The synthetic method is simple, the yield of asymmetric catalytic products is high, the enantioselectivity of lactone products is 95% or above, conditions are mild, operation is easy, the production cost is low, and the method can be used for industrial production.

A technology for manufacturing H-shaped spanner includes such steps as forging to obtain the raw blank of H-shape spanner with H-shaped handle, forging again to obtain the fine blank, and grinding. Its advantages are simple process and precise sizes.