112results about How to "Improve degumming efficiency" patented technology

The invention discloses a silk fabric degumming method and a silk fabric degumming apparatus. The invention belongs to the technical field of silk degumming. The method is characterized in that the method comprises the steps that: water with a required volume is injected in a degumming tank according to the weight of silk fabric and a bath ratio of 1:40-50; a pH value of the water is regulated to 8.5-9.5; the water is heated to a temperature of 50-60 DEG C; 1.00-2.50g/L of alkali protease is added into the degumming tank; silk fabric is placed into the tank, and supersonic wave is started, wherein the supersonic wave frequency is 30-80KHz; the supersonic wave treatment is performed for 35-60min, and washing is carried out. According to the invention, factors influencing silk fabric degumming are analyzed, and optimal technical values of alkali protease concentration, degumming time, degumming temperature, pH value, and bath ratio are determined. Also, the degumming apparatus is improved, such that silk fabric degumming time is effectively reduced, and silk fabric degumming efficiency is greatly improved.

The invention relates to a photoresist removal method and a semiconductor production method. The photoresist removal method is that after ions are injected into the art, the photoresist with a surface on which a hard layer is formed is removed. The method comprises the following steps: a softening process is used; a dry stripping process and a wet stripping process are used, due to the fact that the softening process is conducted on the hard layer of the surface of the photoresist, and the hard layer of the photoresist caused by the ion injection process and the like is softened, and thereby the removal of the photoresist is enabled to be simplified. Meanwhile the fact that the semi-conductive product is not damaged during the photoresist removal process is guaranteed, and the yield of the semi-conductive product is greatly improved. The invention further provides a semiconductor production method which comprises the photoresist removal method.

The invention relates to a degumming technology of natural bamboo fiber, and belongs to the technical field of plant fiber manufacturing. The technology comprises the steps that bamboo chips are pretreated to be hammered into thin filaments, then the thin filaments are sequentially subjected to the processes such as acid soaking, steaming, fermenting, enzymolysis, bleaching, oiling, softening, dewatering, opening and drying, and the natural bamboo fiber is prepared. Accordingly, the acid soaking-high pressure steaming-microbial degumming composite technology is adopted, the synergist effect is generated among the steps, therefore, the degumming effect of the natural bamboo fiber is improved, and the prepared fiber has the advantages of being high in degumming efficiency and little in damage to the fiber intensity.

The invention relates to a method for refining camellia seed crude oil, in particular to a method for refining the camellia seed crude oil by using immobilized phospholipase A1. The technical scheme of refining the camellia seed crude oil by using the immobilized phospholipase A1provided by the invention is realized by the following steps of: a, immobilizing phospholipase; b, carrying out pre-treatment on the camellia seed crude oil; c, adding the immobilized phospholipase into the camellia seed crude oil; and d, agitating and then centrifuging, namely realizing that the camellia seed crude oil is refined by using the immobilized phospholipase. The method for refining the camellia seed crude oil provided by the invention has the beneficial effects that unsaturated fatty acid is lost for 1-3% and is reduced by 15-20% compared with the loss of the unsaturated fatty acid in chemically-refined camellia seed oil; the immobilized phospholipase A1 is degummed to reduce phosphorus content in the oil to be lower than 5 mg/kg; the heat resistance of the immobilized phospholipase A1 is improved; the immobilized phospholipase A1 can keep a higher activity in a wider pH value range and the sensitivity of the immobilized phospholipase A1 to a reaction environment is reduced, so that the operation conditions are easier to control and implement.

The invention relates to a method for degumming crude soybean oil by an immobilized phosphatidase membrane. The method allows problems that the soybean oil degumming effect is bad because the temperature and the pH are difficult to control in present enzyme degumming methods and the cost of the present enzyme degumming methods is high to be solved. The immobilization of an enzyme is in favor of the dispersion, the recovery and the reutilization of the enzyme, so the loss of the enzyme and the repollution of the residual enzyme are reduced. The method for degumming the crude soybean oil by the immobilized phosphatidase membrane comprises the following steps: 1, preparing a composite membrane; 2, immobilizing phosphatidase; 3, carrying out early stage processing on soybean oil; 4, adding the immobilized phosphatidase to the soybean oil; and 5, stirring, and centrifuging. So the crude soybean oil is degummed by the immobilized phosphatidase membrane. By adopting the method in the invention to degum the crude soybean oil, the degumming efficiency is 20-30% higher than the degumming efficiency of the present degumming methods, and the production cost is 20-40% lower than the production cost of the present degumming methods.

The invention provides a bamboo fiber degumming process through continuous scouring and a process device. The process includes the following steps: making bamboo wood into bamboo filaments through a mechanical wire-dividing device, twisting the bamboo filaments into rope-form bamboo fibers through a twisting bucket, and then feeding the rope-form bamboo fibers into a scouring pool; kneading the rope-form bamboo fibers through a kneading roller while scouring in the scouring pool; washing and dry-rolling the bamboo fibers using a powerful water injector during the delivering process through a delivery roller to finally obtain bamboo fiber volumes. According to the invention, bamboo fiber scouring, kneading and splitting are performed concurrently, which solves the problems of automatic, continuous and overall delivery of the scattered bamboo fibers in the scouring pool, improves the bamboo fiber degumming efficiency, and lays a foundation for continuous and automated production of the bamboo fibers.

The invention relates to a combined degumming technological method for jute or kenaf. The method comprises the following steps: conducting organic solvent pretreatment on the jute or kenaf, conducting steam explosion and ammonia immersion treatment, then conducting ultrasonic bleaching to remove most gum in the original jute or kenaf, and relying on the residual gum to bond jute or kenaf single fiber and form a technological fiber capable of being utilized by textile processing. Test results show that by combination of the organic solvent, and the steam explosion and ammonia immersion methods, gum of hemicellulose, lignin and the like in the jute or kenaf can be effectively removed, the jute or kenaf fiber prepared by the method is high in splitting degree and good in flexibility, and the degumming method is low in cost, energy-saving, environment-friendly, simple to operate, and suitable for bast-fiber degumming treatment in spinning.

The invention discloses a method for degumming silybum marianum seed oil, relates to the technical field of refining of grease, and in particular relates to a method for degumming silybum marianum seed oil to remove nonhydratable phospholipid. The method specifically comprises acid reaction, alkali neutralization, enzyme reaction, separation and drying, wherein the acid used in the acid reaction is citric acid; and the enzyme used in the enzyme reaction is phospholipase. The method comprises the following steps: heating crude oil to 70 to 80 DEG C; adding 45 percent (w/v) citric acid solution; preserving heat for 20 to 30 minutes under the mechanical stirring condition; cooling the crude oil to 50 DEG C; adding 4 percent (w/v) NaOH solution; adjusting the pH value to 5 to 5.3; adding the phospholipase; stirring under the heat-preserving condition; and filtering or centrifugally separating. By the enzyme method degumming method, the phospholipid content of the silybum marianum seed oil is obviously reduced, the degumming efficiency is high and the advantages are obvious. The method is simple in process, mild in reaction condition, low in energy consumption and easy to control.

The invention discloses a cleaning system. The cleaning system which comprises two deionized water storage tanks, a control device for heating deionized water to be in a high temperature state, a cleaning cavity and a jet device for jetting a mixed fluid containing deionized water and high temperature vapor to the cleaning cavity is characterized in that: the outlet of one deionized water storage tank is connected with one inlet of the jet device through the control device, and the outlet of the other deionized water storage tank is connected with one inlet of the jet device; and the outlet of the jet device is connected with the inlet of the cleaning cavity. The invention also discloses a cleaning method. The cleaning method comprises the following steps: 1, forming the high temperature vapor; 2, forming the mixed fluid containing deionized water and the high temperature vapor; and 3, cleaning a sample wafer with the mixed fluid. According to the cleaning system and the cleaning method in the invention, all of an inorganic carbonization thick layer, a bottom organic photoresist and SU-8 cure-crosslinked by the bottom organic photoresist can be peeled, so the photoresist removal efficiency is substantially improved, there are no residues, and the loss of a substrate material is minimized.

The invention provides a regulation method of generation of oxidized cellulose in a ramie oxidizing and degumming process. The regulation method includes the following steps: preparing a degumming liquid and mixing raw hemp of ramie with the degumming liquid; regulating the pH of the degumming liquid; heating and stirring the mixture to fully removal colloid through oxidizing property of peroxides; on-line detecting generation quantity of the oxidized cellulose; and optimizing and regulating the pH, reaction temperature, reaction time and chemical reagent concentration in real time to control the aldehyde group content in the oxidized cellulose to be 15-40 [mu]mol/g and the carboxyl group content to be 120-200 [mu]mol/g, so that the fiber crystallization degree, polymerization degree, strength, breaking elongation and fineness of the prepared fine dry ramie fiber are maximum and the degumming efficiency and the physical mechanical performance are best within the ranges of the parameters. The method can increase degumming efficiency and reduce fiber damage, achieves best degumming effect, achieves optimum control in the preparation process of the ramie fiber, and has important theoretical meaning and application value.

The invention discloses an enzymatic degumming process based on immobilized compound phospholipase. The enzymatic degumming process comprises the following steps: A, preparing the immobilized compound phospholipase; B, applying the immobilized compound phospholipase to degumming of oils and fats, wherein the compound phospholipase contains phospholipase A1, phospholipase C, lipase and protease. According to the enzymatic degumming process based on the immobilized compound phospholipase, the phospholipase A1, the phospholipase C, the lipase and the protease which are used for degumming are immobilized on the same macroporous resin simultaneously firstly, then the macroporous resin immobilized with the phospholipase A1, the phospholipase C, the lipase and the protease is used for degumming the oils and fats, the phospholipase A1, the phospholipase C, the lipase and the protease play a synergistic role to degum the oils and fats, so that the immobilized compound phospholipase can be used repeatedly for degumming, enzyme residues are avoided in the oils and fats, the degumming efficiency is high, and oil yield is high.

The invention relates to a Candida tropicalis DK2 strain and an application thereof. The ITS sequence of the strain is shown as SEQ ID NO:1. The strain is used for preparing flax, jute, kenaf or bamboo fibers through retting, scouring the flax, jute, kenaf or bamboo yarns and degumming the original hemp of flax, jute and kenaf or bamboo fabrics. The strain disclosed by the invention is short in growth period and is difficultly polluted, the treatment cost is low, the treated fibers are high in quality, the treatment environment is mild, the heat resistance is high, and environmental pollution is avoided; and moreover, the strain can be directly applied to degumming the flax, jute, kenaf or bamboo fibers and has the advantages of short degumming period, high fiber dispersion rate and high degumming efficiency.

The invention relates to a method for degumming hemp. According to the method, an organic solvent is used as an extraction solvent, catalysts are adopted to degum hemp raw materials and remove lignin,the extraction process comprises four steps of catalytic cooking, solvent washing, water washing and bleaching, and the catalysts are selected from creosote, crosol, kreosote and/or creosote oil. According to the method, the technical problems of high energy consumption, large amount of waste water and high damage to the fiber strength of a conventional method for degumming hemp are avoided, andthe method has the advantages of high degumming efficiency, high product whiteness, high utilization ratio of raw materials, low equipment requirement, low cost, cleanness, energy conservation, environmental friendliness and safety and is suitable for large-scale industrial production.

The invention relates to a degumming solution and belongs to a chemical treatment solution, which is used for removing a fastening glue film adhering to the surface of mechanical parts. The invention provides a degumming solution that has a short degumming duration and has no corrosion to the mechanical parts. The invention consists of halogenated hydrocarbon, acetone, paraffin, white oil, a high molecular polymer and the latent solvent for the high molecular polymer. The degumming solution is characterized in that the weight percentage for the components is as follows: halogenated hydrocarbon 30 to 50 percent, white oil 4 to 10 percent, acetone 40 to 60 percent, high molecular polymer 0.05 to 0.1 percent, paraffin 0.5 to 2 percent and the rest is the latent solvent for the high molecular polymer.

The invention provides a vegetable oil degumming method, and relates to the technical field of enzymatic degumming of oils and fats. The method comprises the following steps: 1, immobilizing phospholipase; and 2, degumming oil by the immobilized phospholipase. The immobilization of the phospholipase includes immobilization of phospholipase A1 and immobilization of phospholipase C; and degumming ofoil comprises pretreatment of vegetable oil, primary degumming of the vegetable oil by using the immobilized phospholipase C; and secondary degumming of the primarily degummed vegetable oil by usingthe immobilized phospholipase A1. The method adopts an immobilized phospholipase C and phospholipase A1 combined degumming technology, and the degumming effects of the two enzymes on the oil are fullyshown, so the yield of the neutral oil is increased; and the immobilized phospholipase can be repeatedly used, so the production cost is saved.