295 results about "Ethyl hydroxybenzoate" patented technology

A microbicidal composition containing: (a) 1,2-benzisothiazolin-3-one; and (b) at least one microbicide selected from among benzalkonium chloride, benzethonium chloride, benzyl alcohol, caprylyl glycol, chlorphenesin, 2,2′-dithiobis(N-methylbenzamide), diazolidinyl urea, ethylenediamine tetraacetic acid, ethylparaben, imidazolidinyl urea, methylparaben, phenoxyethanol, linoleamidopropyl PG-dimonium chloride phosphate, cocamidopropyl PG-dimonium chloride phosphate, propylparaben, cis-1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride, dehydroacetic acid or its salts, benzoic acid or its salts, sodium hydroxymethylglycinate and zinc pyrithione.

The invention provides an artificial diet for Lepidopterous young larvae. The artificial diet for the Lepidopterous young larvae is prepared from the following raw materials in percentage by weight: 2.0 to 3.0 percent of soybean cake meal, 7.0 to 10.0 percent of corn flour, 2.0 to 3.0 percent of Saccharomyces cerevisiae Hansen, 7.0 to 10.0 percent of tomato sauce, 0.8 to 1.2 percent of sucrose, 1.2 to 1.4 percent of agar, 0.2 to 0.5 percent of sorbic acid, 0.05 to 0.1 percent of vitamin B complex, 0.2 to 0.4 percent of ascorbic acid, 0.1 to 0.2 percent of ethyl p-hydroxybenzoate, 0.2 to 0.4 percent of propionic acid and 71.0 to 77.0 percent of water. The invention also provides a method for preparing the artificial diet and application of the artificial diet. The artificial diet is low in manufacturing cost, easy to operate and high in practicability; and by the artificial diet and the raising method for raising the Lepidopterous young larvae, the survival rate of the larvae is high, the workload is low, and manpower and material resources are greatly saved.

A microbicidal composition of 1,2-benzisothiazolin-3-one; and at least one of benzalkonium chloride, benzethonium chloride, benzyl alcohol, caprylyl glycol, chlorphenesin, diazolidinyl urea, ethylparaben, imidazolidinyl urea, methylparaben, phenoxyethanol, linoleamidopropyl PG-dimonium chloride phosphate, cocamidopropyl PG-dimonium chloride phosphate, propylparaben, cis-1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride, dehydroacetic acid or its salts, benzoic acid or its salts, and sodium hydroxymethylglycinate.

The invention discloses whitening tendering skin-maintaining toner. The whitening tendering skin-maintaining toner comprises the following materials of sodium alginate tech grade, bletilla striata extracting solution, lily extracting solution, leonurus extracting solution, honey, oat beta- glucan, sodium hyaluronate, amino acid humectant NMF-50, glycerin, polyethylene glycol 400, sorbitol, normal saline, essence, ethyl p-hydroxybenzoate and ethanol. Compared with prior art, the produced whitening tendering skin-maintaining toner is colorless, appropriate in viscosity, appropriate in consistence, good in stability, fragrant in smell and refreshing in texture. The whitening tendering skin-maintaining toner maintains moisture of skin, reduces wrinkles, improves roughness, dispels black spots, and maintains the skin to be soft, elastic, smooth, beautiful and rosy.

The present invention discloses an acetagastrodin derivative, a preparation method, a preparation, and applications thereof, wherein the acetagastrodin derivative is a derivative having a general formula I, and R represents an alkyl or carbonyl compound. The preparation method comprises that: ethylparaben, p-hydroxybenzaldehyde, vanillin, nicotinic acid, triacetyl gallic acid, cinnamic acid, acetylsalicylic acid, succinic anhydride or potassium 4-hydroxybulyrate is adopted as raw material and is subjected to a condensation reaction with acetagastrodin to obtain the target product. The preparation is tablets, capsules, injections or lyophilized powder prepared by adding a pharmaceutically acceptable auxiliary agent to the acetagastrodin derivative. The applications comprise the application of the acetagastrodin derivative in preparation of anticoagulation drugs and the application of the acetagastrodin derivative in preparation of drugs for prevention and / or treatment of cardiovascular and cerebrovascular diseases. The acetagastrodin derivative preparation method of the present invention has characteristics of simpleness, easy performing, good reproducibility, and low environmental pollution, and can be used for mass preparation of the compound represented by the following formula.

The invention discloses antipyretic gel, which comprises the following raw materials according to the following mixing relationship: 2.9 to 3.1g of carbopol, 180 to 220ml of propylene glycol, 6 to 10ml of ammonia water, 0.3 to 0.5g of ethyl p-hydroxybenzoate, 0.1 to 0.12g of menthol, 0.1 to 0.12g of borneol, 45 to 55ml of ethanol and 1000 to 1400ml of water. The raw materials are stirred and mixed into a gel state. After being adopted, the antipyretic gel has the advantages that the fever (particularly paediatric fever) curative effect is obvious, the use is simple, convenient and fast, and safety, reliability and painlessness are realized.

The invention provides a normal temperature fresh-keeping agent of Lingwu long jujube and a fresh-keeping method thereof. The fresh-keeping agent consists of raw materials by the mass ratio that: 5.0-20.0 percent of magnolia officinalis extract, 5.0-20.0 percent of forsythia extract, 0.1-1.0 percent of sodium dehydroacetate, 0.01-0.1 percent of ethyl p-hydroxybenzoate, 0.5-5 percent of calcium chloride, 50-100ppm of gibberellin and the rest is water. The effective disease resistant and bacteriostatic fresh-keeping agent is used for pretreating the long jujube and then PE fresh-keeping bags with drilling holes are used for packing; after stored for 30 days at the normal temperature of 18-22 DEG C, good fruit rate reaches 93 percent; furthermore, appearance is fresh; crunchy mouth feeling is obtained; nutrition and flavor is kept constantly; the rigidity of the fruit reaches 13.3kg / cm<2> and vitamin C content reaches more than 60 percent; furthermore, investment on freezer and refrigeration equipment is not needed; due to no residual toxicity, the fruit stored can be eaten directly without doing any harm to the health of human beings.

The invention discloses a marine heavy-duty anti-corrosion coating and a preparation method thereof. The coating comprises the following components in parts by weight: 5-15 parts of mica powder, 10-15 parts of B-N ligand polyaniline / montmorillonite composite conductive material, 8-15 parts of talcum powder, 10-15 parts of quartz powder, 30-40 parts of matrix resin, 0-3 parts of pigment, 0.5-1.0 part of defoamer, 0.5-1.0 part of dispersant, 0.5-1.0 part of coalescing agents and 30-40 parts of solvent, wherein the B-N ligand polyaniline / montmorillonite composite conductive material is synthesized by montmorillonite activated and modified by a surfactant, an organic boronic acid, an aniline monomer and double phenolic hydroxyl derivatives; the organic boronic acid is one of a 2-methyl phenyl boronic acid, a 3-methyl phenyl boronic acid, a 4-methyl phenyl boronic acid, a 3,5-dimethylphenylboronic acid, a phenylboronic acid and 4-methoxy benzene boron; the double phenolic hydroxyl derivatives are one of 3,4-gentisic acid methyl ester, 3,4-dihydroxy benzaldehyde and 3,4-dihydroxy benzoic acid ethyl ester. The coating is excellent in corrosion resistance.

The invention discloses a nanometer normal temperature antistaling agent for vegetables and fruits and process for preparation. The current nanometer normal temperature antistaling agent for vegetables and fruits has the possibly of polluting food and the cost is high. The antistaling agent of the invention comprises raw materials with the following weight percent, nanometer titanium oxide 0.5-10%, nanometer silver titanium 0.01-1%, antonite 5-20%, the mixture of methyl-p-hydroxybenzoate and propyl p-hydroxybenzoate 0.05-1%, ferrous powder 1-5%, cinnamic aldehyde 0.001-0.01%, activated char 2-7%, and the others are carriers. The antistaling agent has a comprehensive formulation, and has the advantages of excellent bacteria-inhibiting and fresh-keeping effects, low cost and no pollution to vegetables and fruits, and is safe to be used.

The invention discloses a whitening and moisturizing freckle removal lotion and a preparation method thereof. The whitening and moisturizing freckle removal lotion comprises the following substances: wheat germ oil, grape seed oil, olive oil, rose corn oil, horse oil, snow lotus herb sunflower seed oil, synthetic silk oil, cucumber extract liquid, a bletilla striata extracting solution, a myosotis extracting solution, a white silkworm extracting solution, a centella extracting solution, a rosemary extracting solution, pearl powder, a cell activator, rose essential oil, distilled water, sodium alginate, propylene glycol, methyl 4-hydroxybenzoate and ethyl hydroxybenzoate. The whitening and moisturizing freckle removal lotion is good in effect and high in security; as the extracting solutions of various herbs are adopted, the whitening and moisturizing freckle removal lotion is mild in nature, good in stability, moist and nourished, and fragrant in smell, can supply nutrient substances for the face skin, remove freckles and yellow, deeply nourish the skin and make the skin moist and elastic; and meanwhile, the prepared whitening and moisturizing freckle removal lotion is milk-white, appropriate in viscosity, fine, smooth and uniform, and favorable in ductility property, and feels cool and comfortable.

The invention discloses a preparation method of an erlotinib hydrochloride key intermediate 4-chloro-6,7-di(2-methoxyethoxy)quinazoline, which comprises the following steps: reacting the raw material ethyl 3,4-dihydroxybenzoate with ethyl 2-methoxysulfonate, nitrating, reducing, cyclizing and chlorinating to obtain the key intermediate 4-chloro-6,7-di(2-methoxyethoxy)quinazoline. The method has the advantages of mild reaction conditions, low cost, high purity and high total yield (up to 74.8%), and can easily implement industrial production.

The invention relates to a medlar mould proof color fixative which comprises components by weight percentage: 0.08-0.12% of ethyl p-hydroxybenzaote sodium, 0.16-0.24% of propylparaben sodium, 1.00-2.00% of iso-ascorbyl sodium, 0.50-0.75% of EDTA-2Na, 1.00-1.50% of sodium pyrophosphate and the balance of water; the medlar mould proof color fixative adopts the sodium salt of hydroxybenzoic acid ester mildewproof agent, has low toxicity, non-sulphur residual, good water-solubility and high efficient inhibiting effect on the mould which cause medlar to mildew; the iso-ascorbyl sodium, the EDTA-2Na and the sodium pyrophosphate which have very good color-preserving effect on the medlar pigment has better color-preserving effect; and the selected mildewproof agent and the color fixative can be well combined and has no influence on the effect with each other after being combined.

The invention discloses disinfectant wipes. The disinfectant wipes comprises a wipes body, wherein a mixed liquid is dissolved in the wipes body, and is prepared from a humectant, a solubilizer, a disinfectant, a preservative, a flavor enhancer and deionized water; the humectant is one or more of potassium sorbate, xylitol and chloroacetic acid; the solubilizer is one or more of sodium carboxymethyl cellulose, sodium dodecyl sulfate, polyvinylpyrrolidone, dipotassium glycyrrhizinate and benzalkonium bromide; the disinfect is one or more of alcohol, paeonol, chlorhexidine acetate, baicalin, aloe extract and citric acid; the preservative is one or more of methylparaben, ethylparaben, diacetyl acetoacetate, salicylic acid and aluminum silicate; and the flavor enhancer is one or more of vanillin, menthol, hexanal and leaf acetate. The wipes have soft texture, bright surface and fragrant smell, and the storage time of the wipes can be prolonged.

The invention provides a preparation method of tarceva. According to the invention, 3,4-ethyl dihydroxybenzoate is adopted as an initial raw material, and is subject to a reaction with ethylene glycol mono-methyl ether; the product is processed through nitrification, reduction, cyclic condensation, and halogenation; the product is then subject to a reaction with 3-aminophenylacetylene; and dry hydrogen chloride gas is delivered in, such that tarceva is produced. The technical scheme provided by the invention is advantaged in that: the reaction condition is mild, the yield of the processing line is high, and the post-treatment is convenient. Therefore, the method is suitable for industrialized productions.

The invention relates to the field of composite fertilizers, and specifically relates to a long-acting sustained-release composite fertilizer comprising wood fiber. The fertilizer is prepared from the raw materials of, by weight, 10-15 parts of diatomite with a specification of 1250-2000 meshes, 10-12 parts of potassium chloride, 18-20 of ammonium carbonate, 12-15 parts of crop straws, 2-4 parts of zinc sulfate, 10-12 parts of calcium superphosphate, 3-5 parts of boron-magnesium fertilizer, 1-3 parts of ferrous sulfate, 12-13 parts of rice bran, 6-8 parts of calcium hydrogen phosphate, 6-8 parts of composted goose dung, 2-3 parts of a BGB microbial agent, 1-3 parts of xylanase, 10-12 parts of wood vinegar liquid, 1-3 parts of wood fiber with a specification of 400 meshes, 10-12 parts of cellulose acetate, 15-18 parts of N-methylpyrrolidone, 1-2 parts of calcium lignosulfonate, 1-2 parts of ethyl para-hydroxybenzoate, 1-2 parts of nano-grade carbon, and 4-5 parts of an auxiliary agent. The composite fertilizer provided by the invention has wide raw material sources, and rich and multi-element nutrients. In a production process, with diatomite and a sustained-release coating agent comprising wood fiber and nano-grade carbon, dual coating can be formed upon the nutrients. The composite fertilizer has excellent and long-lasting sustained-release control capacity, and water-retention and drought-resistant capacities. The fertilizer effect is more long-lasting, and the fertilizer is green and highly efficient. With the fertilizer, crop yield and quality can be substantially improved.

The invention belongs to the technical field of beverage making, and in particular relates to a suaeda salsa beverage. The suaeda salsa beverage comprises the following components by weight percent: 8-10 percent of suaeda salsa, 10-15 percent of glucose, 70-75 percent of purified water, 2-5 percent of sodium bicarbonate and 1-3 percent of ethylparaben. In the invention, the preparation method is simple, and the raw materials used are easily obtained with low cost, so that the production cost is reduced. The suaeda salsa is rich in microelements, vitamins and multiple amino acids, and has functions of eliminating heat and food retention. Sodium ions in the beverage can supplement the body fluid. The suaeda salsa beverage disclosed in the invention can be absorbed by a human body more easily than water, can supplement physical strength in time, is rich in nutrients, and belongs to a rare health-care beverage with very high practical value.

The invention discloses a compound preservative and an application thereof and aims to provide one compound preservative which is simple in preparation method and is good in antiseptic and antibacterial properties. The preservative disclosed by the invention is used as an additive of a skin care product. The technical key points are as follows: the preservative is composed of a solute and phenoxyethanol in a mass ratio of 1 to 1, wherein the solute is composed of the following components in mass percentage: 1%-40% of methyl p-hydroxybenzoate, 1%-40% of ethyl p-hydroxybenzoate, 1%-20% of propyl p-hydroxybenzoate and 1%-15% of butyl p-hydroxybenzoate; the sum of all the components is 100. The invention provides the application of the compound preservative as the additive of the skin care product, belonging to the technical field of household chemicals.

The invention discloses a sterilizing, dehydrating and oxygenating antistaling agent and its preparation method. Current oxygenating and antistaling agents have the double functions of oxygenating and sterilizing, but have heavy irritating odor, which greatly influences the flavor of the food, thus not suitable for industrial application. The antistaling agent of the invention is made up of the following materials in weight ratio: ferrous powder 55-81%, active carbon1.5-4.0%, absorbent resin0.5-2.5%, quick lime0.5-5%, the mixture of ethyl p-hydroxybenzoate and ethyl p-hydroxypropyl formate0.05-0.30%, hydrosulphite0.6-1.25% and the rest is silica gel. The invention integrates the functions of sterilizing, dehydrating and oxygenating and has good effects; the invention is strong in antibacterial action and light in odor, and hardly influences the flavor of the food, thus the invention is suitable for industrial application.

The present invention discloses one kind of gynura skin protecting cream containing gynura root extract, octadecanol, stearic acid, white vaseline, glycerol monostearate, glycerin, ethyl p-hydroxy benzoate, potassium hydroxide and water. Gynura has effective medicinal components with functions of moistening skin, resisting bacteria, diminishing inflammation and resisting virus, so that the gynura skin protecting cream has specific effects of preventing and treating dermatitis and herpes, moistening skin, whitening skin and preventing wrinkles except its skin cleaning effect.

The invention discloses a polyvinyl chloride cable material with excellent mechanical properties. The polyvinyl chloride cable material is prepared from the following raw materials in parts by weight: 15-25 parts of polypropylene, 20-40 parts of polyvinyl chloride, 10-18 parts of epoxy resin, 4-8 parts of modified bentonite, 10-15 parts of silk fiber, 4-10 parts of illite, 3-9 parts of zinc borate, 2-6 parts of a silane coupling agent KH550, 8-12 parts of potassium titanate fiber, 6-12 parts of asbestos fiber, 1.5-3.5 parts of glyoxal, 0.4-1.2 parts of dioctyl adipate, 2-6 parts of coal tar, 0.7-1.1 parts of ethyl p-hydroxybenzoate, 10-20 parts of sweet potato flour, 0.8-1.6 parts of urea, 2-4 parts of tertiary butylhydroquinone and 6-10 parts of tall oil. The polyvinyl chloride cable material with excellent mechanical properties has good thermal insulation property, biodegradability, tensile property and shock resistance and has a low water absorption rate.

A compound sulfapyrimidine silver zinc ointment for treating burn is prepared from sulfapyrimidine silver, sulfapyrimidine zinc, osmotic aid medical auxiliary, ethyl p-hydroxybenzoate, glycerine and distilled water through heating oil phase to 75 deg.C, heating water phase to 75 deg.C, slowly adding oil phase to water phase while stirring, cooling, adding sulfapyrimidine silver and sulfapyrimidine zinc, grinding, and examining. Its advantage is strong antibacterial function.

The invention discloses a plant hollow capsule which comprises the following ingredients by mass: 20 to 30 parts of hydroxypropyl methyl cellulose, 20 to 30 parts of carrageenan, 10 to 25 parts of alginate, 10 to 25 parts of guar gum, 6 to 12 parts of algal polysaccharides, 2 to 6 parts of carboxyl methyl glucomannan, 1 to 3 parts of a soybean isolate protein, 2 to 6 parts of a malt extract, 1 to 4 parts of starch, 40 to 60 parts of ethyl alcohol, 2 to 5 parts of triethyl ester, 1 to 4 parts of glycerin, 0.5 to 1.5 parts of titanium dioxide, 2 to 5 parts of magnesium stearate, 0.1 to 0.5 part of ethyl hydroxybenzoate, 2 to 5 parts of methyl p-hydroxybenzoate, 0.2 to 0.6 part of methyl silicone oil, 1 to 3 parts of an edible pigment, and 70 to 100 parts of purified water. The plant hollow capsule can reduce environmental pollution, prevents and treats the transmission of diseases, and improves the capsule security.

A gynura procumbens skin cream is prepared from, by weight, 22 parts of gynura procumbens extract, 0.9 parts of cetanol, 1 part of octadecanol, 2.7 parts of stearic acid, 4 parts of albolene, 3 parts of glycerin monostearate, 6 parts of glycerinum, 0.2 part of ethyl p-hydroxybenzoate, 1.1 parts of potassium hydroxide and the balance purified water added to reach 100 parts. A synergistic effect is achieved through the dosage and physicochemical properties of all the raw materials, and thus the effects of diminishing inflammation, resisting bacteria, preventing wrinkles and whitening the skin are achieved. The PH value of the gynura procumbens skin cream is close to that of the human body skin, and the gynura procumbens skin cream does not irritate the skin. After the gynura procumbens skin cream is used, people obviously feel comfortable and soft without greasy feelings, and the gynura procumbens skin cream has the remarkable moistening, whitening and skin disease preventing and treating effects.

The present invention relates to a medicinal preparation using extract of animal, plant or microbe as effective component, in particular it is a Nocar ointment for curing herpes simplex and herpes zoster. Its preparation method includes the following steps: firstly, culturing red nocardia CMGCC No.0712, enrichment culture, thallus collection, breaking cell, enzyme, purification to remove fat to obtain the effective component cell wall skeleton of said product, then according to mixing ratio of the formula adding ointment matrix sodium lauryl sulfate, octadecanol, white vaseline, liquid paraffin, ethyl-paraben, glycerine and monostearin and distilled water so as to obtain the invented product. Its cure rate is high, and its total effective rate is 100%.

The invention discloses a Bitongning gel and a preparation method thereof, the drug ingredients are small centipeda herb and biond magnolia flower wet distillation aromatic water, the gel matrix is carbomer, the solvent is propylene glycol and polysorbate 80, the antibacterial agent is ethyl hydroxybenzoate, the stabilizer is ethylenediaminetetraacetic acid disodium salt and the pH regulator is triethanolamine. The Bitongning gel has transparent gel, good dispersion and storage resistance, can prolong the contact time of drug with nasal mucosa and be conductive to improving the bioavailability and the efficacy.

The invention discloses heat-resistant high-strength organic glass and a preparation method thereof. The organic glass is prepared from the following raw materials in parts by weight: methyl methacrylate, methacrylamide, acrylonitrile, isophorone diisocyanate, ethylene glycol dimethacrylate, triallyl isocyanurate, glycerol, acetyl tributyl citrate, dibutyl phthalate, high-density polyethylene, glass fibers, carbon fibers, polyvinyl alcohol fibers, modified montmorillonite, nano silicon dioxide, ammonium persulfate, azodiisobutyronitrile, di-iso-decylphthalate, polyethylene acrylate, ethyl p-hydroxybenzoate and sodium stearate. The invention provides the heat-resistant high-strength organic glass and the preparation method thereof. The organic glass has high strength, high vitrification temperature, good heat resistance, long service life and good economic benefit.

The invention relates to silk-extract-containing sunscreen skincare emulsion and a preparation method thereof. The emulsion is characterized by being prepared from the following raw materials at weight ratio: 51.3%-76.9% of deionized water, 0.1%-15.0% of silk extract, 6.0%-8.0% of C12-C15 alkyl benzoate, 4.5%-6.0% of glycerin, 4.0%-6.0% of isopropyl myristate, 2.5%-4.0% of dicaprylyl carbonate, 2.5%-3.0% of cyclic poly(dimethylsiloxane), 1.5%-3.0% of C12-20 alkyl glucoside, 0.4%-0.8% of methyl hydroxybenzoate, 0.4%-0.8% of ethyl hydroxybenzoate, 0.6%-0.8% of panthenol, 0.3%-0.5% of allantoin, 0.1%-0.3% of ethylenediaminetetraacetic acid (EDTA) disodium, 0.1%-0.3% of dehydroxanthan gum and 0.1%-0.2% of essence. The sunscreen skincare emulsion obtained by the method is used safely and effectively.

The invention relates to paeonol niosome emulsifiable paste. The paste is prepared by the following steps: paeonol, a nonionic surfactant, cholesterol and the like are used for preparing a niosome suspension by a self assembly mode; the suspension, paraffin, glyceryl monostearate, vaseline, propylene glycol, ethyl p-hydroxybenzoate and other auxiliary materials are used for preparing a niosome emulsion; the paste can be partially applied to skin, and can treat allergic dermatitis and eczema with skin whitening effects. The prepared niosomes have round forms, uniform particle size distribution, and high encapsulation efficiency. The paeonol niosome emulsifiable paste has good uniformity and stable properties, and in vitro rat and mouse skin experiment results prove that intracutaneous retention volume of medicaments is substantially increased with slow releasing effects. The partially applied position of the paeonol niosome emulsifiable paste has a high medicament utilization rate and substantial medicament reservoir slow releasing effects, and curative effects are improved.

The invention provides an electric mosquito-repelling liquid for repelling mosquitoes, inhibiting bacteria, refreshing and energizing, and a preparation method thereof. The electric mosquito-repelling liquid for repelling mosquitoes, inhibiting bacteria, refreshing and energizing comprises folium eucalypti oil, mint oil, Arabic gum, gelatin, distilled water, a citronella extracting liquid, a folium artemisiae argyi extracting liquid, a green tea extracting liquid, a dried orange peel extracting liquid, a rosemary extracting liquid, a camphor tree leaf extracting liquid, a marigold extracting liquid, a jasmine flower extracting liquid, a lavender extracting liquid, a touch grass extracting liquid, a plantain herb extracting liquid, a tomato leaf extracting liquid, a illicium verum extracting liquid, propylene glycol, vitamin B1 and ethyl hydroxybenzoate. Compared with the prior art, the electric mosquito-repelling liquid for repelling mosquitoes, inhibiting bacteria, refreshing and energizing, provided by the invention, can refresh and purify air, tranquilize and allay excitement, deorodrize competitiveness and realize long-lasting and durable mosquito repelling, also can be applied onto skin, is safe and non-irritant, and effectively relieves pruritus caused by mosquito bites.

The invention belongs to the technical field of sewage treatment, and relates to a novel crown ether modified cellulose adsorbent capable of adsorbing heavy metals. The adsorbent is prepared by the following steps: firstly, performing graft polymerization on the cellulose surface, performing epoxide ring-opening with ethylenediamine after glycidyl methacrylate is successfully grafted, and introducing a primary amine group; and then, synthesizing 4-ethoxycarbonylbenzo-15-crown-5 by using tetraethylene glycol and ethyl 3,4-dihydroxybenzoate as raw materials, hydrolyzing and acidifying to preapre carboxybenzo-crown ether, performing acyl chlorination to prepare acyl chloride-based benzo-crown ether, drying solvent by distillation, and directly reacting with primary amine on the branch chain of cellulose to realize loading of the crown ether on cellulose. The preparation has an effect of adsorbing heavy metal copper, and is advantageous to industrial production.