33results about How to "High degumming rate" patented technology

The invention mainly relates to the technical field of silk processing, and discloses an environment-friendly silk degumming method, which includes immersion, enzymolysis, fermentation and washing. The method is simple, conditions are mild, high temperature and high pressure are not needed, energy is saved, the method is suitable for batch processing, the degumming rate can reach 89.3 percent, obtain silk is fine and smooth, the color is bright and white-yellow, and economic income can be increased by 12.7 percent. pH of immersed silk is regulated to be alkaline, lipase is added to decompose grease and wax components in the silk, high-temperature cooking is avoided, so that energy is saved, pH is then regulated to be acidic, bromelain is added, and enzymic preparations with different pHs are sequentially used for enzymolysis. The conventional joint use of alkaline protease and surfactant is changed, the environment is protected, soluble impurities under different pHs are sufficiently removed, sericin and remaining fat are decomposed, and the silk degumming rate is increased.

The invention provides a tuna coarse oil refining method. The method comprises the steps as follows: firstly, degumming; secondly, deacidification; thirdly, decoloration; fourthly, deodorization. According to the method, the degumming rate can reach as high as 5.35%, the degummed tuna oil is better in transparency, light in color, and has tinny fishy taste, and convenient for storage, and moreover, the technology required in the method is simple and convenient to realize, and has high practicability.

A preparation method of mulberry bark fibers includes the steps of roguing, binding, caging, chemical pretreatment, supercritical carbon dioxide fluid degumming treatment and biological enzyme degumming treatment, washing, dehydration, oil feed, carding and drying, wherein the chemical pretreatment method includes pickling treatment and alkali oxygen treatment. The mulberry bark fibers prepared through the preparation method are high in degumming rate, low in damage, high in performance and capable of meeting the requirement for modern environment friendliness.

The invention discloses a method for extracting plant pectin from hemp skin. According to the method, the pectin is extracted from the hemp skin, the raw material source is wide, the content of pectinin the hemp skin is high, the amount of the pectin extracted by virtue of the method is 10.46% of the weight of the hemp skin, and the process for extracting the pectin is simple and easy in operation. Ammonium oxalate is weak-acid and weak-base salt, the degumming rate of a solution of ammonium oxalate to the hemp skin is high, the treatment conditions are mild, and the strong damage of jute fibers is small; and meanwhile, oxalate ions can be cheated with calcium ions of calcium pectate to generate soluble ammonium salt, most pectin of the hemp skin is extracted in the solution, and the ethanol precipitation of pectin is further facilitated. Therefore, ammonium oxalate is a degumming agent and a pectin extracting agent, the jute fibers are acquired through the degumming of the hemp skin,and meanwhile, colloid in hemp degumming liquid is adequately utilized, so that the waste is turned into wealth, the economic utilization value of the hemp skin is increased, and sewage discharge isreduced.

The invention relates to a preparation method of ramie fibers for a high-count textile fabric. The preparation method comprises the steps of 1) preimpregnation, wherein raw ramie is immersed in a presoak containing sodium hydroxide for preimpregnation, taken out and dehydrated to obtain a preimpregnated material; 2) steam explosion, wherein the obtained preimpregnated material is subjected to steam explosion to obtain a steam explosion material; 3) boiling off, wherein the obtained steam explosion material is placed in a degumming solution for heat preservation and boiling off to obtain a boiling-off material; the degumming solution comprises water and the following components of sodium hydroxide, sodium sulfite, sodium metasilicate, sodium tripolyphosphate and sodium dodecyl benzene sulfonate; 4) ultrasonic ramie washing, wherein the obtained boiling-off material is placed in water for ultrasonic immersion washing to obtain a water washing material; 5) aftertreatment. The residual gumratio of the obtained ramie fibers reaches 1.2% or below, residual gum is less, and the degumming rate is high; the fiber count is high and reaches 2655 Nm or above, and fibrils of the high-count rawramie are fully released; the loss of strength is less; the first-grade product rate reaches 93.54% or above, the quality is high, and the ramie fibers are fluffy and soft, and suitable for producingthe high-count light ramie textile fabric.

The invention discloses an alkaline pectinase mutant with improved heat stability as well as an encoding gene and application of the alkaline pectinase mutant. By carrying out site-specific mutagenesis at two sites of wild alkaline pectinase, the alkaline pectinase mutant with the improved enzyme activity and heat stability and the decreased optimal action temperature is obtained; the optimal enzyme activity temperature of a double mutant pelN-K93I/G241A is decreased by 5 DEG C than that before mutation, Tm is increased by 1.671 DEG C, the half-life period is prolonged by 15.86 minutes at 60 DEG C, Km is decreased from 2.59 g/L to 1.1 g/L, and the optimal enzyme activity temperature is decreased from 67.5 DEG C to 60 DEG C. The alkaline pectinase mutant has relatively high heat stability and relatively high ramie degumming rate, so that the alkaline pectinase mutant is more suitable for degumming processes and has relatively good application potentials in the textile industry.

One or more embodiments of the invention provide a method for improving the mechanical property of a lotus fiber, and belong to the technical field of lotus fiber modification. The modification methodcomprises the steps that the lotus fibers are placed in a sulfuric acid solution for soaking; a mixed solution of a 1-ethyl-3-methylimidazolium chloride solution, sodium carboxymethyl cellulose and wheat bran is added, and microwave treatment is carried out; the lotus fibers are boiled with sodium hydroxide solution; soaking is carried out in a sulfuric acid solution; and finally, baking is carried out at 90-110 DEG C for 80-120 min to obtain the treated lotus fibers. The modified lotus fiber not only has excellent chemical properties such as moisture absorption and moisture release performance, but also has high medicinal value, and can be used for making close-fitting clothes and articles. Thus, the method for improving the performance of the lotus fiber has a great market prospect, andhas a wide application prospect in the future.

The invention discloses a degumming method for skipjack crude oil, and belongs to the field of food processing. The degumming method is used for solving the problems that the phosphoric acid degumming effect is poor and the degummed skipjack oil is low in transparency and dark in color. The degumming method for the skipjack crude oil comprises the following steps: compounding and adding citric acid and acetic acid in a ratio of (2:1) to (1:1) into the skipjack crude oil, and stirring at 40-60 DEG C for at least 20 minutes; and then, centrifuging at a speed of 5000r/min for at least 10 minutes, wherein the mass of the added citric acid and acetic acid is 1.5% of that of the oil. The compounding proportion of the citric acid to the acetic acid is preferably 1.5:1, the mass of the added citric acid and the acetic acid is preferably 1.5% of that of the skipjack crude oil, the stirring temperature is preferably 50 DEG C and the degumming time is preferably 25 minutes. According to the technical scheme adopted in the invention, gum in the skipjack oil is removed, so that the degumming efficiency is as high as 3.93%; and the obtained degummed skipjack oil is good in transparency, lighter in color than the crude oil, lighter in fishlike smell than the crude oil, and better in phosphoric acid degumming effect in comparison with that in the prior art.

The invention provides garlic sprout leaf fiber with the fracture intensity being 8.5 to 9cn/dtex, the fracture elongation rate being 10 to 11 percent and the fiber length being 20 to 40mm. Preparation steps of the garlic sprout leaf fiber include composite acid pretreatment, low-temperature plasma treatment, microwave radiation and complex enzyme alternate treatment, water washing, soaping, dewatering, fluffing, oiling and drying. The preparation method has the advantages that the fiber degumming time can be shortened; garlic sprout leaf surface attachments can be reduced; the spinning performance can be improved.

The invention discloses a method for increasing the silk degumming rate and belongs to the technical field of degumming. The method for increasing the silk degumming rate comprises steps as follows: S1: to-be-treated silk is immersed into a silk degumming agent, heated under the airtight condition, stirred under the ultrasonic wave action and filtered, and silk is obtained; S2: the silk obtained through filtration in S1 is added to an ethanol-tartaric acid mixed solution and cooled to the room temperature after being heated and stirred; S3: the silk treated in S2 is added to a potassium carbonate solution and cooled to the room temperature after being heated and stirred; S4: the silk treated in S3 is washed clean with deionized water, and gum protein is removed; S5: the silk obtained in S4 is dried, and degummed silk is obtained. The silk treated with the silk degumming method has lower silk breakage strength loss and breaking elongation loss, silk gum in the silk before degumming is basically removed, and the whiteness, the glossiness and the dyeing property of the silk are effectively improved.

The invention discloses a new bast fiber pectin degumming processing method. The new bast fiber pectin degumming processing method comprises the following steps: placing original hemp in water, adding dilute sulphuric acid, heating to 35 to 45 DEG C and soaking for 40 to 50 minutes; taking out the original hemp which is soaked with acid and rinsing twice; heating water to 80 to 90 DEG C in a steamer, placing the original hemp in the water, adding a pre-degumming solution at 150 DEG C, continuing heating for 60 minutes, and cooling to 95 DEG C; heating to 135 DEG C and steaming for 10 minutes; heating to 110 DEG C and steaming for 25 minutes; rinsing the pre-degummed original hemp twice; heating water to 70 to 80 DEG C in the other steamer, placing the pre-degummed original hemp in the steamer, adding a degumming solution at 120 DEG C, heating the water for 50 minutes, and finally cooling to 90 DEG C; heating to 115 DEG C and steaming for 10 minutes; heating to 110 DEG C and steaming for 20 minutes; and cooling to room temperature and rinsing the original hemp three times. According to the method disclosed by the invention, the processed fibers are complete; pectin is removed completely; the damage to the fibers is low; the process time is greatly shortened; and the production efficiency is remarkably improved.

The invention discloses a gutter oil degumming and metal salt removing process. The process comprises the following steps: colloid components in the illegal cooking oil are gathered and separated through acidifying and hydrating, and then the gutter oil is subjected to electric desalting treatment to separate the water phase in which the metal salt is dissolved from the oil phase and thus metal salt components and water components in the gutter oil are removed; specifically, the gutter oil is subjected to degumming and metal salt removal through a gutter oil degumming and metal salt removal device, wherein the mixing cavity is used for processing, the deionized water, the demulsifier and the acid can be uniformly dispersed in the gutter oil, acidification and hydration are facilitated, liquid drops are polymerized in the electric desalting process and thus the degumming rate is improved and the moisture content in the gutter oil is reduced; meanwhile, due to the integrated arrangement,the occupied area can be reduced, the integration degree of the device is improved, the power output device, the output adjusting device and the mixing cavity are arranged in a scattered mode, the convenience during overhauling is improved, meanwhile, the working efficiency is improved through continuous production, and the modern industrial production requirement is met.

The invention relates to a preparation method of cotton stalk bark fibers. The method comprises the following steps: removing impurities, bundling, caging, conducting chemical pretreatment, conducting supercritical carbon dioxide fluid degumming treatment, washing, dewatering, feeding oil, combing, and drying, wherein the chemical pretreatment method comprises acid soaking-ultrasonic treatment, and boiling off. The obtained fibers are high in degumming efficiency, low in fiber damage, and high in fiber performance, thus meeting the modern and environment-friendly requirement.

The invention discloses a degumming method of rice bran oil. The method comprises the following steps: S1, mixing an acid solution of carboxymethyl cellulose and rice bran crude oil, heating to a temperature of 65-80 DEG C, and carrying out thermal insulation stirring for 20-30 min; and S2, heating an aqueous solution of hydroxypropyl guar gum to 65-80 DEG C, then adding the heated aqueous solution of hydroxypropyl guar gum into the material obtained in step S1, carrying out ultrasonic treatment for 4-8 min, then carrying out heat preservation and stirring for 20-30 min, carrying out centrifugal separation, and taking upper-layer grease, so as to obtain the rice bran oil after degumming treatment. The degumming method disclosed by the invention has the advantage of low residual phosphoruscontent of the degummed rice bran oil, can greatly improve the degumming efficiency of the rice bran oil degumming process, is beneficial to subsequent decolorization and refining treatment, and is simple in process, low in cost and convenient to popularize and apply.

The invention discloses a method for efficiently preparing fatty acid from recycled illegal cooking oil. The method comprises the following steps: S1, taking illegal cooking oil, carrying out primary filtration, adding phosphoric acid, heating, carrying out heat preservation and stirring, then adding water, continuously carrying out heat preservation and stirring, centrifuging and taking an oil phase, and carrying out secondary filtration, so that clear oil liquid is obtained; S2, adding water into the clear oil liquid obtained in the S1, uniformly mixing, then adding a catalyst and an adsorbent, heating, carrying out heat preservation and stirring, introducing hydrogen, continuously carrying out heat preservation and stirring, carrying out reduced pressure evaporation, and collecting evaporated gas, so that the fatty acid is obtained. The method disclosed by the invention has the advantages that an appropriate catalyst and adsorbent are selected, and an appropriate preparation technology is combined, so that yield of the fatty acid is greatly increased, preparation period is shortened, and preparation efficiency is improved.