41results about How to "The extraction process is environmentally friendly" patented technology

The invention discloses a glutamic acid separating and extracting technology. The technology is characterized in that glutamic acid in the isoelectric point liquid of glutamic acid is separated and extracted through adopting an ion exchange method, an acid solution not an alkali solution is directly used to elute for generation after the ion exchange resin adsorption of the glutamic acid, and an eluate obtained after the ion exchange returns to an isoelectric operation for glutamic acid extraction. Compared with traditional technologies, the technology disclosed in the invention has the advantages of saving of a large amount of an acid and an alkali, reduction of the production cost and the environmental pollution, and economic benefit improvement.

The invention provides a method for smelting high-purity nickel-molybdenum alloy by using complex nickel-molybdenum ore. The alloy comprises the following components in percentage by mass: 8 to 30 percent of Ni, 10 to 30 percent of Mo, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of C, less than or equal to 0.1 percent of Cu, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, and the balance of iron. According to the characteristic that the complex nickel-molybdenum ore is difficult to separate, the high-purity nickel-molybdenum alloy is smelted by adopting the routes of oxidizing and roasting nickel-molybdenum sulfide type mineral to remove sulfur, reducing and smelting high-alkalinity slag to obtain crude alloy, refining high-alkalinity weak oxidative slag to remove silicon and phosphorus and treating and refining Ba-Ca in vacuum to deeply remove phosphorus, sulfur and oxygen; the alloy can be used for nickel-molybdenum alloying and alloying of high nickel-molybdenum alloy steel in high-purity steel production, and has the advantages of high purity, no pollution, good alloying effect and the like; and the method has the characteristics of pure fire method, greenness, no pollution, simplicity in process and the like, realizes efficient utilization of the difficultly separated complex nickel-molybdenum ore, and is worthy of popularization.

The invention discloses an electronic cigarette liquid rich in biological active polysaccharide and a preparation method of the electronic cigarette liquid. The electronic cigarette liquid is mainly formed by the following raw materials in parts by weight: 50-70 parts of propylene glycol, 5-15 parts of glycerin, 5-10 parts of deionized water, 5-15 parts of natural biological active polysaccharide extracts, 3-10 parts of tobacco extracts, 1-5 parts of tobacco flavor, 1-3 parts of thickener and 1-3 parts of antioxidant. The electronic cigarette liquid disclosed by the invention is suitable for being smoked in an electronic atomizing way and is formed by refining the tobacco extracts and the natural biological active polysaccharide extracts, an immune function of a human body is also widely regulated while the feeling of smoking a cigarette is obtained by a consumer, and a certain healthcare function is obtained.

The invention discloses an extraction method of polysaccharide with activities of kidney warming and Yang tonifying from Aspongopus chinensis Dallas insects of Pentatomidae and application of the polysaccharide. The extraction method comprises the following steps: (1) drying Aspongopus chinensis Dallas insect bodies, performing pulverization, performing reflux extraction with petroleum ether, andconducting filtration liquid-solid separation so as to obtain drug residues with removal of grease; (2) evaporating the drug residues, performing reflux extraction with distilled water, performing filtration, combining the filtrate, and performing concentration so as to obtain total water extract; (3) adding distilled water to the total water extract for slight dilution, performing precipitation on polysaccharide with an alcohol solution, performing stirring while the alcohol solution is added, and performing still standing and filtration so as to obtain an insect polysaccharide alcohol precipitate; and (4) adding water to the insect polysaccharide alcohol precipitate for dilution and dissolution, performing chromatography separation and purification by using a DEAE-Sephadex ged cellulosecolumn, and performing rinsing with distilled water and a sodium chloride solution so as to obtain the Aspongopus chinensis Dallas polysaccharide. The invention also relates to the application of thepolysaccharide in preparation of drugs for treating or preventing Yang deficiency, impotence and erectile dysfunctions, the method is easy has simple and convenient operation, and the obtained polysaccharide compound with a purity of up to 95% has strong effects of kidney warming, Yang tonifying, fatigue resistance and body immunity recovery.

The invention relates to a method for preparing chestnut shell vegetable dye through a subcritical method and a dyeing method thereof, the preparation method comprises the following steps: 1) adding chestnut shells and purified water into subcritical stainless steel equipment, adding a high-temperature alkaline buffer agent AH into the subcritical stainless steel equipment, then heating to subcritical temperature, extracting chestnut shell natural pigment, filtering and discharging; and 2) adding a natural dyeing auxiliary agent FA into the extracting solution obtained after filtration in the step 1) to prepare the chestnut shell vegetable dye. The chestnut shell vegetable dye prepared by adopting a subcritical method is subjected to a one-bath low-temperature sectional dyeing method, so that higher dye-uptake and color fastness can be obtained, agricultural and forestry waste resources can be recycled, the environment is improved, and textiles dyed by plants are safer and more environment-friendly.

The invention discloses a method for extracting podocar-pusflavone from juniper berry meal. The method comprises the steps that reflux extraction is performed on the juniper berry meal through an ethanol solution with the volume fraction of 70%-80% to obtain an extracting solution, and the extracting solution is concentrated under reduced pressure to obtain concentrate; the concentrate is diluted by adding water, solid-liquid separation is performed after standing is performed, and supernatant liquor is taken; the ethanol degree of the supernatant liquor is regulated to be 20%-30% through ethanol, solid-liquid separation is performed after standing is performed, and precipitates are taken; the precipitates are dissolved with a diluted hydrochloric acid solution and then added into a macroporous resin column, elution is performed with water until the pH value of effluent is neutral, then desorption is performed with the ethanol solution, a desorption solution is collected, and the desorption solution is concentrated under reduced pressure and dried to obtain a juniper berry meal extract. According to the method, the steps are simple and convenient, operation is easy, and the method is suitable for industrialized production; due to the fact that only water and ethanol are adopted as the solvent, not only is the cost greatly reduced, but also no stimulation or toxicity is basically generated to operating personnel and the environment; the content of podocar-pusflavone in the juniper berry meal extract reaches up to 30%-40%, and the extraction efficiency is high.

The invention discloses a wound dressing of bacterial cellulose based sericin and peppermint oil nanoparticles and a preparation method of the wound dressing. The wound dressing is in a composite film form, and the composite film is composed of bacterial cellulose, sericin and peppermint oil; the bacterial cellulose is a 3D reticular biological high-molecular polymer synthesized through microbial fermentation, has good air permeability, water permeability and water retention performance, is excellent in mechanical property, and meets the basic requirements of wound dressings. Sericin is a natural hydrophilic protein in silkworm cocoons, has the potential of becoming a novel wound dressing, has cell protection and mitosis effects on fibroblasts and keratinocytes, can promote fiber proliferation, and enables the fibers to be attractive to skin development; and besides, the sericin has good hydrophilicity, biocompatibility, biodegradability and good affinity to biomolecules, so that the excellent moisture retention of the sericin is beneficial to accelerating wound healing.