60results about How to "Adapt to industrial mass production" patented technology

The invention relates to a one-die-multi-part forging process of a groove-shaped part. The one-die-multi-part forging process comprises the following steps of 1, blanking process; 2, heating process;3, pre-forging process; 4, final forging process; 5, final forging process; 6, shot blasting process; and 7, sawing process. In the step 1, a metal disc saw is used for sawing round bar materials; inthe step 2, a medium-frequency heating furnace is used for carrying out heating treatment on the round bar materials cut off by the saw; in the step 3, upsetting treatment is carried out on the heatedround bar materials by an air hammer, the oxide skin on the surface of the round bar materials is removed, and the blank is upset until the sectional area is the same as the sectional area of a part;in the step 4, final forging treatment is carried out on the pre-forged blank by a hot die forging press, and the size of the part after the part is formed is consistent with the requirement of the drawing; in the step 5, the final forging part is subjected to edge cutting treatment by an open-type inclinable press; in the step 6, shot blasting is carried out on the cut part by using a crawler-type shot blasting machine; and in the step 7, the sawing process is carried out on the part subjected to shot blasting treatment through a band sawing machine, and finally the groove-shaped part is obtained. The production cost of the forging process is reduced, and the prepared groove-shaped part is high in strength and good in toughness.

The invention discloses a BHK-21-SC cell strain adapted to serum-free suspension culture and a method for preparing a vaccine antigen with the cell strain. The BHK-21-SC cell strain is a juvenile golden hamster kidney cell strain, and has the preservation number of CGMCC No.16817. The cell strain is cultured according to the initial cell density of 0.5-0.6*10<6> cell / ml. 72 hours later, the cellsgrow to the cell density of 8-10*10<6> cell / ml. The screened and domesticated BHK-21 cell strain adapted to serum-free full suspension culture is used for production of a high-titer Newcastle diseasevirus solution, and a domestication process for preparation of Newcastle disease virus by the BHK-21 cell strain adapted to serum-free suspension culture is established.

The invention provides a membrane filtration technology for preparing xylitol from viscose fiber squeezed alkali solution. The technology is characterized by comprising the following steps: step A, membrane condensation: pre-filtering squeezed liquid generated during the viscose fiber production process so as to remove the large particle impurities, cyclically condensing the filtrate by a nano-filter membrane for 2 to 4 times, and transferring the last concentrate to a diffusion-dialysis cation exchange membrane stack so as to obtain the concentrate namely the concentrate of squeezed liquid, wherein the nano-filter membrane cyclic concentration is performed for 2 to 4 times, and before each filtration, the liquid should be diluted by water before being filtered by the nano-filter membrane; step B, semi-fiber extraction: adding acid into the concentrate of the squeezed alkali liquid to neutralize the concentrate so as to obtain a semi-fiber solution; step C, hydrolysis: adding diluted sulfuric acid into the obtained semi-fiber solution to carry out hydrolysis reactions; step D, purification: filtering the hydrolysate by a ceramic membrane, then filtering the filtrate by a nano-filter membrane to remove the salts, decoloring the concentrate by active carbon to obtain a purified solution of xylose; step E, hydrogenation: introducing hydrogen gas into the purified solution of xylose to carry out hydrogenation reactions in the presence of a catalyst namely nickel so as to obtain the xylitol.

The invention discloses a preparation method of a nanometer silver wire. A one-pot method is adopted, namely, the nucleation process and the growth process of the nanometer silver wire are sequentially carried out in the same reaction container. The theory of "low-temperature nucleation and high-temperature growth" is applied, that is, a nanometer-silver decahedron is formed at low temperature, and the growth of the nanometer silver wire is promoted at high temperature. The nanometer silver wire prepared by the method is uniform in diameter and size and has a large application prospect in thefields of electronic devices and / or photon devices.

The invention provides an electrodialysis process for preparing food-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor. The process comprises the following specific process steps: (A) carrying out membrane concentration: firstly pre-filtering squeezed liquor for viscose fiber production, so as to remove large-granule impurities, cyclically concentrating the permeate for 2-4 times with a nano-filtration membrane, feeding the finally-concentrated concentrate to an electrodialysis membrane reactor, and recovering alkali liquor, namely a concentrate of the squeezed liquor, from an anode chamber, wherein during the 2-4 times of cyclic concentrating of the nano-filtration membrane, before every filtration, material liquid is thinned up with water and then enters the nano-filtration membrane; (B) extracting hemicellulose: adding acid to neutralize the concentrate of the squeezed alkali liquor, so as to obtain hemicellulose liquid; (C) carrying out enzymolysis: adding a compound enzyme into the hemicellulose liquid, and carrying out enzymolysis reaction, so as to obtain an enzymolysis solution; (D) purifying: filtrating the enzymolysis solution with the ceramic membrane, desalting the permeate with the nano-filtration membrane, enabling the obtained concentrate to be subjected to activated charcoal decoloring and resin ion exchange, so as to obtain a purified solution of xylo-oligosaccharide, evaporating and baking, thereby obtaining the food-grade xylo-oligosaccharide.

The invention discloses a medical silicone gel tape and preparation method thereof, which relates to the technology field of materials or devices of a bandage, a dressing, an absorbent pad or and a surgical article. The medical silicone gel tape comprises a nonwoven fabric layer, a silicone gel layer and a release type substrate. The nonwoven fabric layer, the silicone gel layer and the release substrate are arranged in order from top to bottom. The silicone gel layer is formed on the nonwoven fabric layer by a silicone gel semi-solid state. The medical silicone gel tape and preparation method thereof is applied to medical clinical dressing, and has the advantages of good air permeability, good fit and the like.

The invention belongs to the technical field of organic synthesis and in particular relates to a method for preparing a 5'-substituted tetrazole compound by taking a zinc Lewis acid surfactant as a catalyst. The method comprises the following steps: 1) taking the zinc Lewis acid surfactant Zn(OSO2CnH2n+1)2 as the catalyst and enabling R group nitrile and sodium azide to react in water, so as to obtain zinc salt of a 5'-R group tetrazole compound and a byproduct NaOSO2CnH2n+1; 2) acidifying the zinc salt of the 5'-R group tetrazole compound obtained by step 1) under an acidic condition to obtain the 5'-R group tetrazole compound and a byproduct zinc bromide; 3) carrying out substitution reaction on the byproduct NaOSO2CnH2n+1 and the byproduct zinc bromide under an acidic condition to obtain the zinc Lewis acid surfactant Zn(OSO2CnH2n+1)2. In the method, a one-pot-method strategy can be adopted and starting raw materials are subjected to continuous cyclization reaction and acidification reaction to directly prepare a target compound containing a tetrazole structure unit; the zinc Lewis acid surfactant used in the method can be recycled after the reaction is finished.

The invention provides a membrane concentration process for preparing food-grade xylo-oligosaccharide from squeezed liquor for viscose fiber production. The process comprises the following specific process steps: (A) carrying out membrane concentration: firstly pre-filtering squeezed liquor for viscose fiber production, so as to remove large-granule impurities, cyclically concentrating the permeate for 2-4 times with a nano-filtration membrane, thinning up the finally-concentrated concentrate with water, and filtrating with a ceramic membrane, so as to obtain a concentrate, namely a concentrate of squeezed alkali liquor, wherein during the 2-4 times of cyclic concentrating of the nano-filtration membrane, before every filtration, material liquid is thinned up with water and then enters the nano-filtration membrane; (B) extracting hemicellulose: adding acid to neutralize the concentrate of the squeezed alkali liquor, so as to obtain hemicellulose liquid; (C) carrying out enzymolysis: adding a compound enzyme into the hemicellulose liquid, and carrying out enzymolysis reaction, so as to obtain an enzymolysis solution; (D) purifying: filtrating the enzymolysis solution with the ceramic membrane, desalting the permeate with the nano-filtration membrane, enabling the obtained concentrate to be subjected to activated charcoal decoloring and resin ion exchange, so as to obtain a purified solution of xylo-oligosaccharide, evaporating and baking, thereby obtaining the food-grade xylo-oligosaccharide.

The invention provides a membrane concentration process for pressing xylitol from viscose pressed liquor. The membrane concentration process comprises the following specific process steps: A, performing membrane concentration, wherein the viscose production pressed liquor is firstly prefiltered to remove large-particle impurities, penetrated liquor is circularly concentrated 2-4 times by virtue of a nanofiltration membrane, concentrated liquor obtained at the last time is diluted by being added with water and then fed into a ceramic membrane for being filtered, and the obtained concentrated liquor is the concentrated pressed alkali liquor; the feed liquor is diluted by being added with water and then enters the nanofiltration membrane before the penetrated liquor is filtered when the penetrated liquor is circularly condensed 2-4 times by virtue of the nanofiltration membrane; B, extracting hemicellulose to neutralize the concentrated pressed alkali liquor by adding acid to obtain hemicellulose liquid; C, performing enzymolysis, wherein compound enzyme is added into the hemicellulose liquid to generate enzymatic hydrolysis to obtain enzymatic hydrolysate; D, fermenting, wherein the enzymatic hydrolysate is fermented for 0.5-2 hours at 50-60 DEG C under the action of candida mycoderma bacteria; and E, purifying, wherein the fermented liquor is ultra-filtered to remove impurities, and the penetrated liquor is desalinized by virtue of the nanofiltration membrane, the obtained concentrated liquor is purified liquor of xylitol, and the xylitol is obtained by virtue of ion exchange, active carbon treatment, concentration and crystallization and separation.

The invention provides a process for producing food-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor. The process comprises the following specific process steps: (A) carrying out membrane concentration: firstly pre-filtering squeezed liquor for viscose fiber production, so as to remove large-granule impurities, cyclically concentrating the permeate for 2-4 times with a nano-filtration membrane, thinning up the finally-concentrated concentrate with water, and filtrating with a ceramic membrane, so as to obtain a concentrate, namely a concentrate of the squeezed alkali liquor, wherein during the 2-4 times of cyclic concentrating of the nano-filtration membrane, before every filtration, material liquid is thinned up with water and then enters the nano-filtration membrane; (B) extracting hemicellulose: adding acid to neutralize the concentrate of the squeezed alkali liquor, so as to obtain hemicellulose liquid; (C) carrying out enzymolysis: adding a compound enzyme into the hemicellulose liquid, and carrying out enzymolysis reaction, so as to obtain an enzymolysis solution; (D) purifying: filtrating the enzymolysis solution with the ceramic membrane, desalting the permeate with the nano-filtration membrane, enabling the obtained concentrate to be subjected to activated charcoal decoloring and resin ion exchange, so as to obtain a purified solution of xylo-oligosaccharide, evaporating and baking, thereby obtaining the food-grade xylo-oligosaccharide.

The invention relates to a fish noodle comprising major ingredients and minor ingredients, the major ingredients include fish 800-1000 parts, starch 300-500 parts, water 300-500 parts, the minor ingredients include the following raw materials (by weight ratio of the major ingredients): 0.3-0.5% of crisp enhancer, 0.1-0.3% of flavoring agent, 0.1-0.3% of gourmet powder, 2-3% of table salt, 1-3% of white sugar, 3-5% of lard, 2-4% of fresh ginger, 0.1-0.3% of pepper powder, 1-3% of egg white. The process for preparing the noodle consists of preliminary treatment, collecting meat, cooling down through refrigeration, making fish glue, mixing, stirring, forming, shaping, cooling down and packaging.

The invention provides a membrane concentration process of extracting hemicellulose from pressed liquid produced by viscose fiber production. The membrane concentration process is characterized by comprising the following steps: prefiltering the pressed liquid produced by the viscose fiber production firstly to remove large-particle impurities, concentrating permeated liquid by a nanofiltration membrane for 2-4 times in a circulation mode, conveying a concentrated liquid obtained at the last time into a ceramic membrane to be filtered after being diluted by adding water, and neutralizing the obtained concentrated liquid by adding acid to obtain hemicellulose liquid. According to the membrane concentration process provided by the invention, the nanofiltration membrane is used for concentration for 2-4 times in the circulation mode; before filtration for each time, feed liquid enters the nanofiltration membrane after being diluted by water; the obtained hemicellulose liquid is low in alkali concentration, low in salinity, high in hemicellulose purity, high in process running efficiency and applied to large-scale production.

The invention provides a membrane concentration technology for producing xylitol by using viscose fiber pressed liquor as raw materials. The technology comprises the following specific steps: A, membrane concentration: the pressed liquor produced by viscose fibers is firstly processed in a pre-filter manner to remove impurities with large particles to enter a micro-filter membrane to be processed, the penetrated liquor is concentrated two to four times in a circulating manner through a nano filter film, the final concentrated liquor is diluted by adding the water to be sent into a ceramic membrane to be filtered, and the obtained concentrated liquor is the concentrated liquor of the pressed alkali liquor; the nano filter membrane is concentrated two to four times in a circulating manner, and before filtration each time, the material liquor is diluted by adding the water to enter the nano filter film; B, semi fiber extraction: the acid is added into the concentrated liquor of the pressed alkali liquor to neutralize to obtain semi fiber liquor; C, hydrolysis: dilute sulphuric acids are added into the semi fiber liquor to carry out the hydrolysis; D, purification: the hydrolysis liquor is filtered through the ceramic membrane, the penetrated liquor enters the nano filter membrane to be desalted, and the concentrated liquor is decolored through active carbon to obtain the purified liquor; E, hydrogenation: the hydrogen is communicated into the purified liquor of xylose, and the hydrogenation is carried out on the basis of the catalysis of nickel to obtain the xylitol.

The invention discloses a high-frequency protection single-sided glue preparation method, which comprises that one surface of a metal substrate layer is compounded with an anti-magnetic heat dissipation layer, and the other surface of the metal substrate is compounded with a piercing type heat conducting layer. According to the present invention, one surface provides electric conduction shieldingfunction, and the other surface provides magnetic field absorption shielding function, such that the whole functions are heat conduction and heat dissipation; and the product solves the problems of high electromagnetic interference and high heat generation caused by strong signal transmission in a high frequency process.