37results about How to "No decolorization required" patented technology

The invention relates to the technical field of edible oil production and discloses a method for producing an edible camellia oleosa seed oil and the edible camellia oleosa seed oil. The method for producing the edible camellia oleosa seed oil provided by the invention comprises the steps of fruit selection, camellia oleosa seed drying, unshelling, low-temperature cold pressing, filtering, and degreasing and dewaxing, and abandons the complicated refining processes including degumming, deacidification, decoloration, deodorization and the like. The key process of the method for producing the edible camellia oleosa seed oil is optimized and improved creatively so that the integrated production process of the edible camellia oleosa seed oil which is obviously different from the prior art is obtained; the process is greatly simplified and the losses of the nutritional ingredients in the camellia oleosa seed oil and the finished product oil are also avoided; as a result, the nutritional and functional ingredients such as flavonoids, polyphenols, sterol and carotenoid in the camellia oleosa seed oil are guaranteed to an utmost extent; and the first-grade edible camellia oleosa seed oil is obtained simply and feasibly.

The invention provides a method for preparing a protein powder by utilizing proteinase to hydrolyze albumen. The method is as follows: the albumen of fresh poultry eggs is taken as raw material and stirred to obtain a protein liquid; the liquid is added with ferment for fermentation and desugarization, added with water to be diluted, and heated to be denatured; hydrolysis through alkaline protease, neutral protease and flavor enzyme is carried out and then the mixture is heated to passivate protease and dried, thus obtaining the protein powder. The method has the advantages of simple technique, convenient operation, high efficiency, low cost, high nitrogen utilization ratio, needing no debitterizing, decolorizing or desalination treatment and having significant application prospect.

The invention discloses a compound stevioside substitute and a preparation method thereof, relating to a natural sweetener and providing a compound stevioside substitute with natural and pure sweet taste and low cost and a preparation method thereof. The compound stevioside substitute comprises a stevia extract, a complexing agent, a pH regulating agent, a natural malt extract, the natural sweetener and natural edible essence in percent by weight of 100: (20 to 100): (1 to 3): (1 to 3): (0.1 to 0.6): (0.01 to 0.03). After dry leaves of stevia are extracted by using water, extract liquid is decolored, smell removed and then filtered; the complexing agent and the pH regulating agent are added according to a proportion to react; the natural malt extract, the natural sweetener and the natural edible essence are added and uniformly stirred, and dried by spray by a spray drying method for preparing a powdery product. The obtained novel compound stevioside product still is a natural high-magnification sweetener and the sweetness of the compound stevioside sweetener is 60 to 80 times of cane sugar. The compound stevioside substitute can replace 70% of the cane sugar in practical application.

The invention discloses a preparation method of walnut oil. The preparation method of the walnut oil comprises the following steps: carrying out careful selecting, carrying out washing, carrying out sterilization, carrying out peeling, carrying out pressing, and carrying out ultrasonic extraction. According to the preparation method of the walnut oil, the preparation is carried out at 45 DEG C, and the walnut kernel peel is removed before pressing by using alkaline liquor, so that the qualities and the color of the walnut oil are improved; and ultrasonic extraction is adopted so as to increase yield rate, reduce oil content rate of the oil cakes, balance protein in the walnut oil and the oil cakes so as to ensure protein stability in the oil cakes, and improve wax-oil separation effect. The preparation method of the walnut oil is simple in processes; and the walnut oil which is clear, transparent and bright in color, free of impurities, rich in nutrition and high in oil yield can be prepared without the step of carrying out decoloring by adopting the preparation method.

The invention discloses a pressing ring type double-screw spiral oil press comprising a base, a motor mounted on the base, a transmission mechanism, a left support and a right support. The motor is connected to the transmission mechanism through a conveying belt. A pressing cage mechanism is mounted between the left support and the right support, an oil collecting plate is mounted below the pressing cage mechanism, and the tail of the pressing cage mechanism is provided with an oil cake regulating mechanism. A three-way feeding hole communicated with the pressing cage mechanism is formed in the left support, and the left support is provided with a feeding mechanism communicated with the three-way feeding hole. The pressing ring type double-screw spiral oil press is characterized in that the transmission mechanism is connected to a power distribution mechanism which is connected to the pressing cage mechanism; the pressing chamber of the pressing cage mechanism comprises a plurality of pressing rings mounted in a pressing cage; the end face of one side of the pressing ring is provided with a plurality of oil discharging grooves. The pressing ring type double-screw spiral oil press has the advantages that structure is simple, parts are few, equipment manufacturing cost is low, operation and maintenance can be performed simple and conveniently, and cold pressing and hot pressing can be performed both.

The invention discloses a one-step color-development screening method for banned azo-dye in dyeing textiles. The one-step color-development screening method comprises the following steps: (1) reducing a sample; (2) color-development, to be specific, at the same position of filter paper, dripping a drop of a color-developing agent, and then dripping 1-2 drops of tert-butyl methyl ether extracting solution for color development, wherein the color-developing agent is an ethanol solution comprising paradimethylaminobenzaldehyde with the mass-volume ratio of 0.1-10% and hydrochloric acid with the volume ratio of 10-25%; (3) screening and determination, to be specific, judging results according to the fact that whether obvious color change occurs or not after dripping the sample solution on the color-developing agent, wherein if no obvious color change occurs after color development of the sample solution, the sample does not contain a substance to be detected or the concentration of the substance to be detected is lower than the detection limitation, and the result is negative; if obvious color change occurs after color development of the sample solution, the sample is likely to contain the banned azo-dye, the result is positive, and further confirmation is required to be carried out by a chromatographic apparatus. The one-step color-development screening method is simple and fast, the sample can be directly subjected to color-development to be determined after being reduced, and the whole color development process can be completed within 1 min.

The invention discloses a method for manufacturing a honeycomb core with a filling material by using textile waste. The method for manufacturing the honeycomb core with the filling material by using the textile waste is characterized by comprising the following steps: the first step is reverting the textile waste to reprocessing fibers, and preparing two kinds of fiber felts by using the obtained fibers, wherein the thermal properties of the two kinds of fiber felts are different, one of the fiber felt comprises thermoplastic fibers and the other fiber felt does not comprises thermoplastic fibers, and coating hot melting rubber bars on the fiber felt without the thermoplastic fibers at the intervals of three times of the length of the side of the honeycomb core, wherein the width of each hot melting rubber bar is equal to the length of the side of the honeycomb core; the second step is compositing the two kinds of fiber felts which are prepared in the first step, pre-heating, hot-pressing and cooling the composite body of the fiber felts to form semi-finished honeycomb core; and the third step is cutting the semi-finished honeycomb core prepared in the second step into a plurality of pieces of honeycomb core strips with required height, pre-heating the honeycomb core strips, drawing the honeycomb core strips along the sections of the honeycomb core strips, unfolding the honeycomb core strips, cooling the honeycomb core strips, and then obtaining the hexagonal honeycomb core. According to the method for manufacturing the honeycomb core with the filling material by using the textile waste, the mechanical property of the honeycomb core can be improved by using the poor-qualified rigid textile waste, cost is reduced, and heating insulation performance and sound insulation performance of the honeycomb core are improved.

The invention belongs to the technical field of papermaking, and in particular relates to environment-friendly food packaging paper. The environment-friendly food packaging paper is prepared from the following raw materials in parts by weight: 100 parts of dried rice straw, 1-4 parts of pullulan, 1-4 parts of curdlan, 0.12-0.18 part of glucomannan and 40-50 parts of sterile water. The environment-friendly food packaging paper is prepared by crushing, pulping, steaming, paper film formation and drying, and has the characteristics of environment friendliness, nature, no toxicity, sanitation and the like.

The invention relates to a pretreatment steam extraction method for rosin, arabinogalactan and dihydroquercetin in larch wood powder. The method comprises the following steps of S1, water immersion pretreatment, wherein the larch wood powder is subjected to water immersion treatment, filtration is conducted to obtain a filtrate containing arabinogalactan, and the moist larch wood powder is reserved; S2, steam extraction, wherein steam with the pressure of 0.2 MPa is added to the moist larch wood powder treated in the first step for steam extraction, and filtration is conducted to obtain an extraction solution; S3, concentration and drying of the extraction solution, wherein the extraction solution of the third step is concentrated and dried to obtain an extract containing rosin and dihydroquercetin; S4, recrystallization, wherein the extract containing the rosin and dihydroquercetin is recrystallized to obtain the refined rosin and dihydroquercetin separately. The method has the advantages that the material is directly used without being dried, the method is economical and environmentally friendly, many products are generated, the yield is high, solvents are not needed in all the processes, and the method is low in cost and suitable for industrial large-scale production.

A method for producing edible EDTA-2Na includes neutralizing reaction between chloroacetic acid and sodium carbonate, condensing reaction on ethyldiamine, using acid to regulate acidity to obtain EDTA, and reaction on sodium hydroxide to obtain EDTA-2Na.

The invention discloses a technology for preparing sodium dehydroacetate in a membrane reactor with an immobilized catalyst. The technology comprises the following steps: firstly, pumping methylbenzene into the ceramic membrane reactor filled with the immobilized catalyst, adding ketene dimmer within 0.5 to 1 h, enabling the feeing mass ratio of ketene dimmer to methylbenzene to be 1:(5 to 15), controlling the reaction temperature to be 50 to 70 DEG C, and controlling the pressure of the reactor to be 0.8 to 2 MPa, wherein the addition quantity of the catalyst is 0.5wt% to 3wt% of total feeding quantity, the immobilized catalyst is prepared with an impregnation method; when the HPLC content of ketene dimmer in the reaction solution is greater than or equal to 0.5%, after a polymerization reaction ends, enabling a penetrating fluid to enter into a sodium hydroxide water solution used for an extraction tower for carrying out an extraction reaction according to the mole ratio of ketene dimmer to sodium hydroxide being 1:(1 to 1.5), concentrating a sodium dehydroacetate solution, and carrying out drying, smashing and product packaging at the temperature of 90 to 105 DEG C, wherein theyield of the prepared sodium dehydroacetate is greater than or equal to 99%, and the product content is greater than or equal to 99.8%. According to the technology, the production cost is effectivelyreduced, the quantity of three wastes during production is reduced, and the prepared sodium dehydroacetate is high in yield.

The invention discloses a method for refining dihydroquercetin from larch by using micro-porous resin. The method comprises the following steps: (1) after crushing the raw material larch wood, adding ethanol water solution to extract, collecting extracting solution and concentrating to obtain extract; (2) performing liquid phase adsorption separation on the extract by using micro-porous resin MCI, performing gradient elution by taking the ethanol water solution with volume fraction of 0-30 percent as an eluant, collecting and combining elution components with volume fraction of 20-25 percent, concentrating and drying to obtain a dihydroquercetin rough product; and (3) recrystallizing the dihydroquercetin rough product to obtain refined dihydroquercetin. According to the method, environment-friendly solvents such as water and ethanol are adopted, are pollution-free and can be recycled; the used adsorbent micro-porous resin introduces less impurities and can be reused for times; the obtained product has purity of greater than 99 percent and has no toxic ingredient residues, and the pharmaceutical-grade raw material can be directly obtained. The method has the advantages of simple route, economy, environmental friendliness and high yield and is suitable for industrial production.

The invention discloses a one-step color-development screening method for banned azo-dye in dyeing textiles. The one-step color-development screening method comprises the following steps: (1) reducing a sample; (2) color-development, to be specific, at the same position of filter paper, dripping a drop of a color-developing agent, and then dripping 1-2 drops of tert-butyl methyl ether extracting solution for color development, wherein the color-developing agent is an ethanol solution comprising paradimethylaminobenzaldehyde with the mass-volume ratio of 0.1-10% and hydrochloric acid with the volume ratio of 10-25%; (3) screening and determination, to be specific, judging results according to the fact that whether obvious color change occurs or not after dripping the sample solution on the color-developing agent, wherein if no obvious color change occurs after color development of the sample solution, the sample does not contain a substance to be detected or the concentration of the substance to be detected is lower than the detection limitation, and the result is negative; if obvious color change occurs after color development of the sample solution, the sample is likely to contain the banned azo-dye, the result is positive, and further confirmation is required to be carried out by a chromatographic apparatus. The one-step color-development screening method is simple and fast, the sample can be directly subjected to color-development to be determined after being reduced, and the whole color development process can be completed within 1 min.

The invention belongs to the technical field of papermaking, and particularly relates to an environment-friendly food packaging paper, which is made of the following raw materials in parts by weight: 100 parts of dry rice straw, 1-4 parts of pullulan, 1-4 parts of coagulated polysaccharide, glucomannan 0.12-0.18 parts of sugar and 40-50 parts of sterile water are prepared by crushing, refining, steaming, forming into film-shaped paper, and drying. It is environmentally friendly, natural, non-toxic, and hygienic.

The invention discloses a method for extracting xylan from hickory shells. The method comprises the following steps: adding hickory shell powder and a solid phase reagent into a ball mill, grinding the hickory shell powder and the solid phase reagent to obtain ball-milled mixed powder, adding a limited volume of water to the powder, vibrating and centrifuging the obtained solution, collecting theobtained supernatant, and freeze-drying the supernatant to obtain the xylan. The hickory shell powder and the solid phase reagent are commonly ground and crushed under the action of high-energy mechanical force, and water is as the solvent in the extraction process, so the emission of a waste liquid is reduced, the obtained xylan has the advantages of high purity, remarkably improved content of xylose in monosaccharide compositions, good color and no decolorizing, the process flow is simplified, and the production cost is reduced. The method has the advantages of simplicity in operation, shortextraction time, mild extraction conditions, high efficiency, low energy consumption, environmental protection, and easiness in large-scale industrial production, is a method for preparing xylan fromhickory shells, having a good promotion and application prospect, and lays a foundation for the further development and utilization of the xylan in the hickory shells.