81results about How to "Raw materials are economically available" patented technology

A zero-valent iron and biochar composite chemical for in-situ remediation of groundwater contaminated with chlorinated hydrocarbons is prepared from materials in percentage by weight as follows: 5%-30% of zero-valent iron powder, 8%-30% of a biochar source, 35%-85% of water, 0.1%-1% of a stabilizer, 1.5%-3% of a thickener, 0.3%-1% of an emulsifier and 0.01%-0.1% of a micronutrient source. The required raw materials are uniformly mixed by mixing equipment with high shearing for 15-30 min, and composite slurry which has good fluidity, is conducive to in-situ injection and can be stably stored is obtained. The prepared zero-valent iron and biochar source composite chemical has excellent fluidity and migration and diffusion capabilities and has a good remediation effect on complex contaminated sites containing both unsaturated and saturated chlorinated hydrocarbons. Besides, the selected raw materials are economic and available, the cost of the chemical is greatly reduced, and large-scale remediation of actual sites is facilitated.

The invention discloses a slow-release repairing material for organochlorine pesticide contaminated farmland soil. A preparation method of the slow-release repairing material comprises the following steps: preparing a biochar carrier; pretreating zero-valence iron powder; and preparing the slow-release repairing material. The slow-release repairing material comprises, by mass, 15-30% of the biochar, 10-20% of an organic carbon source, 5-10% of zero-valence iron, 5-10% of illite and 25-50% of guar gum. The organic carbon source can promote the activity of degrading bacteria as a growth matrix,and the biochar has a strong physical adsorption effect on organochlorine pesticides and provides inorganic nutrient minerals for soil; above effective components are organically combined by an embedding agent to realize the physical-chemical-biological synergistic enhanced repairing of the organochlorine pesticide contaminated farmland soil, so the pollutant removing effect is good, the treatmentlong-acting property of the organochlorine pesticides by the repairing material is improved, and fly-away loss caused by direct application of a powdery raw material is reduced. The slow-release repairing material for organochlorine pesticide contaminated farmland soil is suitable for repairing farmland soil contaminated with low-concentration organochlorine pesticides, and has a very broad application prospect.

The invention discloses a method for removing trace cadmium from an aqueous solution. The method comprises the following steps: culturing and analyzing plants growing in a chrome environment, adjusting the pH value of a cadmium-containing aqueous solution with acid or alkali; simultaneously or separately adding ferriferous reagents, carbonates and phosphates or molybdates into the aqueous solution; standing still for depositing, separating out cadmium-slag containing water, wherein the cadmium content of the cadmium-slag containing water is detected to be less than 0.01 mg/L. The method disclosed by the invention is characterized in that through controlling the adding amounts of the ferriferous reagents, the carbonates and the phosphates or the molybdates and the pH value of the cadmium-containing aqueous solution, trace cadmium elements in the cadmium-containing aqueous solution can be removed, and the water treatment time is short, adopted materials are economic and easy to obtain, and no harmful element is added into a system, therefore, the method is an environment-friendly and economic treatment process, and the process can be widely applied to the treatment of cadmium-containing wastewater discharged in the fields of the metal processing industry, the electroplating industry, the leather making industry and the textile industry, and the like.

The invention discloses a chiral alpha-(trichloromethyl) amine compound and a preparation method thereof. The chiral alpha-(trichloromethyl) amine compound is a potential bioactive molecule synthesis building block and can serve as an important midbody for synthesizing chiral chloric amine compounds, such as 2,2-dichloro aziridine. The preparation method of the invention has moderate technological condition and abundant and cheap raw materials, and the prepared alpha-(trichloromethyl) amine has high optical purity and is convenient to industrially apply. The alpha-(trichloromethyl) amine prepared by the invention can be widely applied in the fields of asymmetric synthesis and medicine research and development. The structural general formula is disclosed in formula (3).

The invention relates to a method for preparing food-grade xylooligosaccharide, which comprises the following steps of: putting xylose, edible acid and polyol into a reaction kettle in a weight ratio, mixing the mixture uniformly to perform polymerization, controlling the temperature to be between 140 and 260 DEG C, reacting the mixture for 0.25 to 4 hours under the vacuum degree of 0 to 1 to form a polymer, and cooling and crushing the polymer to obtain the food-grade xylooligosaccharide. The polymer content of the xylooligosaccharide obtained by the method is up to over 93 percent, the reducing sugar content is less than 1 percent, and the average molecular weight is between 500 and 900; and the xylooligosaccharide is of milk white, has good mouthfeel and can fully meet the application in food processing.

The invention discloses a high-temperature resistant packaging material which comprises the following raw materials in parts by weight: 5-15 parts of polyethylene terephthalate, 5-15 parts of butylene terephthalate, 5-10 parts of talc powder, 5-15 parts of xylan, 5-10 parts of silicon dioxide, 5-10 parts of epoxypropane butyl ether, 5-10 parts of glass fiber powder, 5-10 parts of salicylic acid, 5-10 parts of magnesium oxide, 5-10 parts of zirconium phosphate, 5-10 parts of boron mononitride, 5-10 parts of graphite, 5-10 parts of aluminum silicate fiber, 5-15 parts of polyetherimide, 10-15 parts of polybenzimidazole, 5-10 parts of amino silane and 5-10 parts of phenyl silane. The invention also discloses a preparation method of the high-temperature resistant packaging material.

The invention discloses an ultra-thin nanosheet self-assembled multi-layer BiOCl microsphere and an application thereof in photocatalytic coupling of a benzylamine to an imine, and belongs to the technical field of photocatalytic material preparation. The ultra-thin nanosheet self-assembled multi-layer BiOCl microsphere is prepared by a solvothermal method by using Bi(NO3)<3>.5H2O and KCl as raw materials and ethylene glycol as a medium under assistance of a surfactant PVPK30. The nano microsphere has a diameter of 1.3-1.6 [mu]m, and the ultra-thin BiOCl nanosheet constituting the microsphere has an average thickness of 3.8 nm. The BiOCl nano microsphere has relatively high activity in photocatalytic coupling of a benzylamine to a corresponding imine, and problems of long reaction time, low conversion rate and the like in preparation of an imine of a conventional BiOCl material are solved. The microsphere has the advantages of simple process, short preparation period, green environment protection, high conversion rate, high stability, and being reusable, actual production needs are met, and application potential is relatively great.

The invention provides a phospholipid punicic acid grease compound, a preparation method and an application thereof. The phospholipid punicic acid grease compound is prepared from the following components by mass percent: 55-85% of diglyceride, 10-45% of triglyceride, 0.2-8% of monoglyceride and 0.03-9% of residue; the mass ratio of punicic acid to fatty acid in the whole glyceride composed of monoglyceride, diglyceride and triglyceride is (0.3-0.7):1; the residue contains free fatty acid and glycerinum. The invention relates to the preparation method for the compound and the application of the compound in functional food and drugs. The phospholipid punicic acid grease compound prepared according to the invention has a weight-losing effect of diglyceride and also has the anti-inflammatory and weight-losing effects of punicic acid, so that the compound can be used in the functional food and drugs for controlling weight, improving blood fat and enhancing immunity. In a word, the compound has the advantages of simple preparation process, low cost and wide application prospect.

The invention relates to a taurine energy food and belongs to the field of food. The taurine energy food is prepared from cereals, nuts, an adhesive, taurine and other additives. Cereals are one or more of oat, wheat and corn. Nuts are one or more of peanut, apricot kernel, cashew nut and pine nut. The taurine energy food has the advantages that the solid taurine energy food is prepared by breaking common rules; the taurine energy food is more convenient to carry and contains more energy compared with other energy foods; the taurine energy food is healthier and easier to absorb compared with energy supplement foods among which chocolate is the commonest; sugar in energy bars is monosaccharide, disaccharide and oligosaccharide. Oligosaccharide is formed by polymerization of 3-10 monosaccharides and can stably release energy. Therefore, energy can be provided by the energy bars quickly, sustainable energy supply can be guaranteed, energy relay is realized, a stable blood glucose level is maintained, and athletic ability is improved.

The invention belongs to the field of biochemistry and mainly relates to a coumarin skeleton based Wittig reagent as well as a preparation method and application thereof. The Wittig reagent disclosedby the invention is based on coumarin skeleton improvement, and a structural formula of the reagent is shown as a formula I. In addition, the invention further provides a preparation method of the compound and application thereof in a nucleic acid detection aspect. According to the coumarin skeleton based Wittig reagent designed in the invention, in an effective combination of a fluorescence sensing technology and a traditional Wittig reaction, high-sensitivity high-selectivity detection of 5-formyl uracil (5fU) is realized. Meanwhile, the reagent is simple in synthetic route, mild in reactionconditions and economic and readily available in raw materials, and provides a new thought for designing the conventional reactive 5-formyl uracil (5fU) fluorescence probe.

The invention discloses a sustained-release composite remediation agent for treating persistent halogenated hydrocarbon in groundwater and a preparation method thereof. The preparation method comprises the following steps: 1) preparing bacterial liquid saturated black carbon; 2) preparing a colloidal solution A containing locust bean gum and an organic carbon source; 3) preparing a colloidal suspension B containing locust bean gum, an organic carbon source, a nano-scale zero-valent metal and the bacterial liquid saturated black carbon; 4) carrying out a crosslinking reaction for 2-6h; and 5) carrying out a delayed crosslinking reaction for 2-6h to obtain a sustained-release composite remediation agent for treating persistent halogenated hydrocarbon in groundwater. The sustained-release composite remediation agent prepared by the method provided by the invention can utilize the good adsorption performance of black carbon, the high-efficiency chemical reducibility of the nano-scale zero-valent metal and the dissimilation iron reduction dehalogenation capability of functional microorganisms to achieve the physical, chemical and biological synergistic remediation effect of persistent halogenated hydrocarbon polluted groundwater, and has the advantages of long action period, stable structure, low cost, environmental friendliness and the like.