46results about How to "Gentle production process" patented technology

The invention discloses a production method of hand-tearing fabric. The production method comprises the following steps: interweaving warps and wefts to obtain gray fabric, wherein cation modified polyester fiber is adopted for the warps and the wefts; carrying out acid treatment and alkali treatment on the gray fabric obtained in step (1), then dyeing and soaping to obtain the hand-tearing fabric. According to the manner, the production method of the hand-tearing fabric is simple in operation, easy to master perfectly, safe and effective, and mild in production process; no danger can occur, and the obtained hand-tearing fabric is low in price, does not have much difference from existing hand-tearing fabric in performance, and can be popularized and applied in a wide scope.

The purpose of the invention to provide a polymeric acid solution thickener. The thickener has excellent resistance to a high temperature and shearing, and can meet high temperature and deep well construction requirements. The ternary copolymeric acidified fracturing thickener obtained in the invention can be used for thickening an acid solution with the hydrochloric acid concentration of 5-28%, the apparent viscosity of the thickener at room temperature is 100 mPa.s or above, the viscosity retention rate at 90 DEG C still reaches 60% or above, the viscosity at 110 DEG C can still reach 30 mPa. s or above, and the thickener has good thickening and temperature resisting performances. Compared with conventional preparation technologies, a technology disclosed in the invention has the advantages of high production efficiency, simplicity, mild production conditions, easiness in control of the polymerization process, great reduction of the production cost, and easiness in industrial promotion; and the above product has the advantages of good solubility, convenience in transportation, and good application prospect.

The invention discloses a preparation process of dalteparin sodium. The preparation process comprises the following steps: preparing a heparin sodium solution, a heparin degradation fluid, a reducing solution and a crude product, refining, freeze-drying and the like. The average molecular weight of the obtained product is 5,500 to 6,500, the peak molecular weight is 3,500 to 6,000, a component with the molecular weight of less than 3,000 is not greater than 13% , a component with the molecular weight of greater than 8,000 is not greater than 15%, anti-Xa activity is more than or equal to 130IU / mg. The invention has the advantages of rich source of raw materials, high yield, stable and reliable quality, high purity, low cost, simple process, easiness in operation and no waste discharge. The dalteparin sodium has the anticoagulant, antithrombotic, anti-tumor, anti-inflammatory, anti-allergy and blood lipid regulating effects, thereby having a significant curative effect. The dalteparin sodium can be used for preventing preoperative and postoperative thrombosis of general surgery, orthopedic surgery and neurosurgery, effectively preventing venous thromboembolism of ischemic stroke patients, greatly reducing the risk of stroke, effectively preventing the solidification caused by extracorporeal circulation of blood, effectively preventing the instable coronary heart disease, and having a wide usable range.

The invention discloses a method for catalytically oxidizing acetophenone. The method comprises the step of contacting acetophenone, hydrogen peroxide and a catalyst. The method is characterized in that the catalyst contains titanium silicalite molecular sieves and multi-metal oxyacid and / or multi-metal oxysalt. The method is environment-friendly, is simple in production process and is beneficial to industrial production and application.

The invention relates to a method used for reducing the sulfur content in sulfur-containing light oil. The method comprises steps that: a light oil raw material is delivered into a primary hydrodesulfurization processing reactor, and is subject to contact reaction with a hydrodesulfurization catalyst C1; an effluent is delivered into a secondary hydrodesulfurization processing reactor, and is subject to contact reaction with a hydrodesulfurization catalyst C2; an effluent is processed through gas-liquid separation, such that a light oil product with low sulfur content is obtained. According to the invention, a fixed bed reactor structure is adopted in both the primary hydrodesulfurization processing reactor and the secondary hydrodesulfurization processing reactor. The two stages of hydrodesulfurization processing reactors are connected in series. The sulfur-containing light oil is processed through two times of continuous hydrodesulfurization reactions, such that sulfur content is reduced. Hydrodesulfurization is ensured, an alkene reducing phenomenon can be effectively controlled, loss of octane number can be controlled, and the reaction conditions are mild. The hydrogenation-modified light oil product provided by the invention is not required to be processed through alkali washing, the octane number loss of the product is low, and a yield of the product is higher than 99%.

The invention discloses a production and processing method of an organic fertilizer by using livestock and poultry manure. The production and processing method has the advantages that the investment cost is low, the structure is simple, the operation is convenient, the production process is continuous and moderate, the production of pollution wastes is avoided, the utilization degree is high, andthe like; the suitability of raw materials is wide, the requirements are low, the matching degree between systems is high, and the link is nature. The prepared fertilizer has the advantages that the forming degree of particle is high, the daily output is high, the efficiency is high, and the clean and environment-friendly effects are realized; after the fertilizer is applied to agricultural products, the high-yield, high-quality and safety effects are realized, the soil can be optimized, the dependency on chemical fertilizer is decreased, and the higher social and economic value is realized.

The invention relates to an adhesive composition for coating of a glass slide and a single-surface coating technology. The adhesive composition is prepared from the following components according to amass / volume ratio: a component 1 and a component 2, wherein the component 1 is prepared from 0.05 to 0.3% of film forming agent (polyvinyl alcohol), 0.02 to 0.25% of adhesive (carboxymethylcellulose), and the balance of water; the component 2 is prepared from 0.2 to 1mg / 100ml of cationic swelling agent (polylysine), and the balance of water. The single-surface coating technology comprises the following steps of cleaning the glass slide by ultrasonic waves in an alkaline solution, drying, spraying and coating the component 1 to the front surface according to the amount of 20 to 50mu l per piece, drying at the temperature of 35 to 55 DEG C, cooling to room temperature, spraying and coating the component 2 to the same surface according to the amount of 10 to 30mu l per piece, drying at the temperature of 35 to 55 DEG C, and packaging under the vacuum condition. The adhesive composition has the advantages that the effects of high adhesivity, uniform distribution and high definition of cells or tissues on the glass slide are realized; the continuous, automatic, stable, uniform and batch type single-surface zonal spraying and coating technology is realized. The prepared pathology slidecan resist the repeated washing and soaking by various alcohols and reagents, be suitable for the wall attaching, single-layer distribution and no falling of the cells, the tissues and the like, and can reach the effects of clear background and no impurity.

The invention discloses a profiled polylactic acid fiber and a preparation method thereof. Cross section of the profiled polylactic acid fiber can be of C shape, hollow circular shape, trilobal shape, cross shape and triangular shape; and compared with common circular polylactic acid fiber, the profiled polylactic acid fiber has good hydrophilicity, bulkiness, flexibility, luster and excellent mechanical properties. The invention also discloses a preparation method of the profiled polylactic acid fiber. The profiled polylactic acid fiber with uniform structure and excellent mechanical properties is prepared by using profiled spinneret orifices in the melt spinning process at moderate spinning speed, lower heat stretching and heat treatment temperature, stretching ratio and mild melt spinning process conditions in a liquid phase thermostatic bath by improving spinning dynamics.

The invention discloses a method of preparing granular sodium tert-butoxide, which includes the following steps: using metal sodium, tert-butanol and an inert organic solvent as raw materials; adding the tert-butanol and the inert solvent into a reaction kettle and then adding the metal sodium into the reaction kettle; under the protection of a nitrogen gas, refluxing for 8-40 h; at a normal temperature, distilling the tert-butnaol; after totally distilling the tert-butanol, reducing the pressure to -0.08 to -0.098 MPa to distil the remained insert organic solvent; then adjusting the stirringrate of the reaction kettle to 10-80 r / min; reducing the pressure to distil the inert organic solvent; obtaining a residual granular sodium tert-butoxide product in the reaction kettle; cooling the product to less than 40 DEG C to obtain the required granular sodium tert-butoxide. The method can perform a production by using universal chemical equipment. An operation condition is moderate; a protection technique is simple; and the raw materials used are easily obtained. The quality of the product is stable and reliable. The shelf life of the product can be effectively prolonged.

The invention discloses a preparation method of a special soybean protein isolate for a frozen meat product and an application of the preparation method, and belongs to the field of food processing. The preparation method comprises the following steps of: taking low-temperature soybean meal as the raw material, subjecting the soybean meal to alkali extraction and acid precipitation treatment to obtain neutral liquid soybean protein, subjecting the liquid soybean protein to high pressure homogenization and water-bath heating treatment, and subjecting the resulting product to spray drying to obtain the product. When the preparation method disclosed by the invention is applied for preparing the soybean protein isolate, high pressure homogenization and heating are applied to treating the liquid soybean protein in combination to obtain the soybean protein product which is high in nutritional value, good in water and oil holding capacity in a frozen condition, and strong in specificity in the meat product. The method disclosed by the invention is wide in raw material resources, low in cost, simple in needed equipment, safe in operation, and free from toxic and side effects, not only improves the added values of the low-temperature soybean meal and the soybean protein isolate, but also provides a soybean protein additive which is strong in specificity and stabler in functions to a frozen meat product industry, simultaneously greatly reduces the production cost of an enterprise, and has wide application prospect.

The invention discloses a preparation process of enoxaparin sodium, which comprises the steps of preparing heparin sodium solution, preparing heparin degradation solution, preparing reducing solution, preparing crude product, refining, freeze-drying and the like. The weight-average molecular weight of the obtained product is 5000-6000, the peak molecular weight is 3000-6000, the component with molecular weight less than 3000 is not more than 11%, the component with molecular weight greater than 8000 is not more than 13%, and the anti-Xa activity is ≥ 135IU / mg.

The invention discloses a catalyst suitable for synthesizing acrylic acid by an aqueous formaldehyde solution and acetic acid and a preparation and application method of the catalyst. The catalyst is mainly characterized by adopting one or more of activated carbon, aluminum sesquioxide, silicon dioxide or molecular sieve as carriers, and loading phosphorus pentoxide and one or more alkaline-earth metal oxides, wherein phosphorus pentoxide accounts for 1%-20% of the total mass of the catalyst, and the alkaline-earth metal oxides account for 5%-30% of the total weight of the catalyst. The catalyst is prepared by the steps of impregnation, temperature programmed calcination and the like, and a vacuum-ultrasonic impregnation technique is introduced during the preparation process. According to the invention, a fixed bed reactor is adopted for produce acrylic acid continuously under the suitable reaction conditions, the conversion per pass of formaldehyde is up to 35%, and the selectivity of acrylic acid is up to 55%.

The invention relates to a preparation method for a cephalosporin anti-infective drug-cefazedone sodium, belonging to the field of pharmaceutical synthesis. According to the invention, the method uses GCLE as a raw material to substitute 7-ACA and overcomes the defects of low yield, high pollution and the like in prior art; the preparation method with mild reaction conditions, little side reaction and simple process is provided; meanwhile, the method has the advantages of cheap and easily-available raw materials, low cost, high product yield, high product purity and applicability to industrial production.

The invention provides a method for synthesizing leuprorelin in a full liquid phase, which comprises the following steps: carrying out condensation reaction on R4-Pyr-His(R3)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-D-Leu-Leu-OH and H-Arg(pbf)-Pro-NHEt to obtain R4-Pyr-His(R3)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-D-Leu-Leu-Arg(pbf)-Pro-NHEt, and then carrying out reaction on the R4-Pyr-His(R3)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-D-Leu-Leu-Arg(pbf)-Pro-NHEt in the cutting fluid to obtain leuprorelin. Compared with the prior art, the method adopts a full liquid phase synthesis method, the production process is green and mild, any highly toxic and precursor reagent is not used, the purity of the product is high, the crude product can reach 90% or above, the cost is greatly reduced, and the preparation method is very suitable for large-scale production.

The invention provides a method for synthesizing leuprorelin in a full liquid phase, which comprises the following steps: carrying out condensation reaction on R4-Pyr-His (R3)-Trp (Boc)-Ser (tBu)-Tyr (tBu)-D-Leuu-Leg-Pro-NHEt and H-Arg (pbf)-Pro-NHEt to obtain R4-Pyr-His (R3)-Trp (Boc)-Ser (tBu)-Tyr (tBu)-D-Leuu-Leg-Arg (pbf)-Pro-NHEt, and then carrying out reaction on the R4-Pyr-His (R3)-Trp (Boc)-Ser (tBu)-Tyr (tBu Compared with the prior art, the preparation method adopts a full liquid phase synthesis method, the production process is green and mild, any highly toxic and precursor reagent is not used, the purity of the produced product is high, the crude product can reach 90% or above, the cost is greatly reduced, and the preparation method is very suitable for large-scale production.

The invention discloses a manufacturing method of granular potassium tert-pentylate, comprising the following steps: taking potassium metal, tert-amyl alcohol and inert organic solvent as raw materials; adding tert-amyl alcohol and inert organic solvent into a kettle; then, adding potassium metal into the kettle; after reflowing for 8-40 hours under the protection of nitrogen, evaporating tert-amyl alcohol at normal pressure; after tert-amyl alcohol is completely evaporated, decompressing to -0.08--0.098 MPa, and evaporating residual organic solvent; then, regulating the stirring rate of the kettle to 10-80 turns / min; decompressing to evaporate inert organic solvent, and leaving granular potassium tert-pentylate products in the kettle; and cooling to be below 40 DEG C to obtain the granular potassium tert-pentylate. The invention can carry out production by using general chemical equipment, has moderate operation condition, simple production technology, convenient and abundant raw material, and stable and reliable product quality and can effectively prolong the quality guarantee period of the product.

The invention discloses a method for catalytically oxidizing acetophenone. The method comprises the step of contacting acetophenone, hydrogen peroxide and a catalyst. The method is characterized in that the catalyst contains titanium silicalite molecular sieves and multi-metal oxyacid and / or multi-metal oxysalt. The method is environment-friendly, is simple in production process and is beneficial to industrial production and application.