959 results about "Sodium metabisulfite" patented technology

The invention discloses a method for floating high-sulfur gold-bearing copper ore, which aims at solving the problems that the existing beneficiation method is lower in copper and gold recovery rate under high-alkali condition, and problems that xanthate and black powder are adopted as high-sulfur gold-bearing copper ore collecting agents, the collecting power is stronger, the selectivity is poor, the separation difficulty of copper and sulfur can be aggravated and the consumption of inhibitors is increased. The method comprises the steps of by adopting lime and sodium metabisulfite as an ore pulp pH regulator and a pyrite inhibitor, and the mixture of isopropyl xanthogen propionitrile ester, black powder acid and ethyl dithiocarboxyl propionitrile ester according to certain proportion as a collecting foaming agent, carrying out ore grinding, rough concentration, primary scavenging, secondary scavenging, primary concentration, and secondary concentration on a crude ore, thus realizing the high-efficiency recovery on copper and gold in the high-sulfur gold-bearing copper ore. According to the method, through reasonable combination and addition of medicaments, the selective adsorption of the collecting agent on target mineral-copper pyrite and other copper sulfide minerals and gold minerals can be reinforced, and the copper recovery rate and the gold recovery rate can be improved.

The invention relates to a low-salt pickled fermented Allium chinense and a processing method thereof. The pickled fermented Allium chinense is prepared by the steps of: taking a fresh Allium chinense; removing fibrous roots and washing; adding table salt, drinking water, glacial acetic acid, citric acid and sodium metabisulfite to carry out primary fermentation for 10 to 12 days; taking the fermented Allium chinense; adding the table salt, the drinking water, the glacial acetic acid and the citric acid to carry out secondary fermentation for 30 to 60 days; proportionally mixing the fermented Allium chinense in the second time with soup; then adding dried red pepper rings; and sterilizing and cooling. The product of the invention has stable quality and low content of sulfur dioxide with preferable preservation of color, brittleness and nutritious elements of the Allium chinense, and has longer shelf life.

The invention relates to a preparation method of an aliphatic high range water reducer applying industry byproduct and the application thereof, which belongs to the field of concrete water reducer. The invention uses the industry byproduct in production of sulfonation-process phenol or the byproduct (Na2SO3 content is 60-85percent) in production of p-cresol and sodium hydrosulfite to produce the aliphatic high range water reducer and takes acetone, formaldehyde, industry byproduct, sulphite or sodium pyrosulfite as raw materials and then sulfonation and condensation reactions are carried out in aqueous medium, the reactant weight ratio is acetone: formaldehyde: sulphite plus industry byproduct: water is equal to 1:2.5-4.5:1.5-2.6:4.0-6.0, the mass concentration of the condensation compound obtained is 30-42 percent, and the viscosity thereof is 20-100m.Pa.S. The product performance of the invention is similar to the common product, but the cost is reduced by 10-20 percent. The invention has environmental protection and waste utilization, can be applied to preparation of various concrete members and production of ready mixed concrete and has good industrialization prospect.

The invention discloses a making method of vacuum-pickled vegetables. The method needs the following raw materials in parts by weight: 50-70 parts of salt, 0.2-0.4 part of sodium dehydroacetate, 5-7 parts of acetic acid, 1-3 parts of lactic acid, 0.1-0.3 part of sodium pyrosulfite, 0.2-0.3 part of EDTA (Ethylene Diamine Tetraacetic Acid) disodium and 900-1100 parts of water. The method disclosed by the invention has the advantages that no wastewater or waste gas is discharged in the production process, so that environmental pollution does not occur; and the formula material water can be used for further seasoning after being processed, so that the material consumption is reduced to half of the material consumption of a traditional pickling method and the cost is saved. The pickled product is safe, sanitary and free from nutritional ingredient loss and has the advantages of good mouthfeel, good crispness, long shelf life, low salinity, convenient storage, small floor area, high product yield and the like.

The invention discloses a method for preparing a modified aliphatic water reducing agent. The water reducing agent is a high-performance water reducing agent synthesized by taking acetone, formaldehyde and sodium metabisulfite as main raw materials and assisting with a proper amount of active agent and accelerating agent under certain conditions. The method comprises the following steps that: weighed tap water, sodium metabisulfite, sodium hydroxide and acetone are added into a four-mouth boiling flask with a reflux condenser tube, a thermometer and a stirrer, and are mixed evenly, then an accelerating agent, namely azodiisobutyronitrile is added into the flask, the temperature is increased, and the thermal insulation is performed after a sulfonation reaction; and the formaldehyde is dripped after the sulfonation reaction is finished, and the dripping speed is controlled. An acrylic acid active agent is added into the obtained product to obtain the modified aliphatic water reducing agent. The method is simple, is easy for industrialized production, reduces production cost, improves working performance (comprising the water-reducing rate and the flowability, workability, water retention property, plasticity retention performance and compressive strength of prepared concrete), and has obvious economic benefit and social benefit.

The invention provides a method for producing high color ratio double-strength caramel using cane molasses, which includes: a, pretreating cane molasses to remove gum, and filtering the molasses solution after neutralizing PH value; b, concentrating the pretreated molasses till the molasses accounts for 60%-80% of total molasses in weight percentage; c, adding solid catalysts, namely sodium pyrosulfite and ammonium bicarbonate; d, adding phosphoric acid to adjust the PH value to 5.5; e, heating and controlling temperature, and performing Maillard reaction; f, cooling caramel; g, blending, metering, and canning to obtain the finished product. The method overcomes a plurality of technical bottlenecks, and implements production of the high color ratio double-strength caramel using the cane molasses to replace white granulated sugar or glucose as material, and accordingly material cost is reduced greatly, and the molasses is turned into wealth. The color ratio of the double-strength caramel can be up to 120000EBC, and liquid catalysts such as traditional liquid ammonia, liquid sulfur dioxide and the like are replaced with the solid catalysts such as the sodium pyrosulfite and the like.

The invention provides a method for preparing a water-coal-slurry additive taking enzymatic hydrolysis lignin as a raw material. In the method, the chemical activity of the enzymatic hydrolysis lignin is utilized to directly perform polycondensation with sodium hydrogen sulfite, sodium metabisulfite, acetone and methanal to a prepare enzymatic hydrolysis lignin-sulphonated acetone-methanal condensation polymer (LSAF); the enzymatic hydrolysis lignin-sulphonated acetone-methanal condensation polymer (LSAF) is compatible with other types of surfactants, and is compounded with the surfactants, such as sodium dodecyl benzene sulfonate, PVA, carboxymethyl cellulose sodium and the like to prepare the water coat slurry which has higher stability and lower viscosity; and the liquidity of the water coat slurry is improved. The enzymatic hydrolysis lignin replaces the partial petrochemical raw materials to prepare modified high molecular materials, which not only lowers the cost of high molecular materials, but also can save the consumption of the petrochemical materials, and can generate significant social benefit; and the processing technique for preparing the water-coal-slurry additive taking the enzymatic hydrolysis lignin as a raw material is simple, is easy to implement and has good effect.

The invention relates to an anti-sloughing diluted filtration reducing agent for drilling fluid and a preparation method thereof. The filtration reducing agent is prepared from the following raw materials by weight portion: 80 to 120 portions of substance containing humic acid, 30 to 80 portions of sodium metabisulfite, 300 to 500 portions of water, 10 to 30 portions of ammonium hydrolyzed polyacrylonitrile, 2 to 15 portions of cross linking agent, 30 to 50 portions of potassium hydroxide, 5 to 20 portions of complexing agent, 1 to 10 portions of urea and 10 to 20 portions of organic silicone resin. The preparation method comprises the following steps: weighting the water, the potassium hydroxide, lignite or peat or weathered coal and the sodium metabisulfite by weight portion, adding the materials into a stirred autoclave, sealing the stirred autoclave, raising the temperature, performing reaction and reducing the temperature; adding the ammonium hydrolyzed polyacrylonitrile, the cross linking agent, the complexing agent, the urea and the organic silicone resin by weight portion into the stirred autoclave after the temperature reduction, sealing the stirred autoclave, raising the temperature and stirring for reaction; and discharging, and performing spray drying on a product to obtain a finished product. The anti-sloughing diluted filtration reducing agent has good comprehensive performance, can prevent slough of mineshafts and reduce the filtration loss and viscosity of slurry, and is easy to realize safe production.

The invention provides a sulfonated acetone-formaldehyde high-efficiency water reducing agent modified by enzymatic hydrolysis lignin or by derivatives thereof, and a preparation method thereof, raw materials comprise the enzymatic hydrolysis lignin or the derivatives thereof, acetone, aldehyde, sodium sulfite and sodium metabisulfite, a base catalyst and an acid regulator; the preparation steps comprise: mixing the sodium sulfite, the sodium metabisulfite with the water, heating at constant temperature and agitating, dropwise adding the acetone, adding the enzymatic hydrolysis lignin or the derivatives thereof, regulating pH value by the base catalyst, dropwise adding the aldehyde, continuous reacting for 3 hours, and adding the acid regulator to regulate the pH so as to result in product. The invention sufficiently utilizes reproducible biological resources, which not only solves the defect of low water reducing efficiency of the lignin-sulphonate water reducing agent extracted from papermaking 'black liquor' in the prior art, but also can replace partial petrochemical raw materials and reduce the production cost of the high-efficiency water reducing agent; the enzymatic hydrolysis lignin- or the derivatives thereof-modified high-efficiency water reducing agent has great use effect.

The invention discloses a flotation separation method for chalcopyrite, galena, zinc blende and ironpyrite by a composite inhibitor which comprises sodium pyrosulfite, sodium sulfite and ferrous sulfate, has an inhibition effect on the galena, the zinc blende and the ironpyrite under the condition of a natural pH value, and is easy to degrade and activate after inhibition during a separation process of the chalcopyrite, the galena, the zinc blende and the ironpyrite. According to the flotation separation method, the flotation is performed under the condition of a neutral medium, the adopted composite inhibitor has the inhibition effect on three metal sulphide ores of the galena, the zinc blende and the ironpyrite; environment pollution caused by adoption of heavy metal salt inhibitors is prevented; pipeline scaling caused by adoption of lime is prevented; and the inhibiting capacity of the composite medicament is relatively weaker and added segmentally, an activation difficulty of follow-up operation due to overinhibition in a flotation process is prevented, and the improvement of the metal recovery rate is further facilitated.

The invention relates to a fermented Kushui rose wine. The preparation method of the fermented Kushui rose wine comprises the following steps: pulping Kushui roses in distilled water to obtain rose pulp; enabling the rose pulp to be sequentially subjected to acidity regulation, sodium metabisulfite sterilization, sugar content regulation, ingredient regulation (addition of yeast nutrients) and enzymolysis impregnation, and then adding Hongjianiang wine yeast to perform fermentation so as to obtain a fermented Kushui rose wine; aging and clarifying the fermented Kushui rose wine to obtain a clarified rose wine; filtering the clarified rose wine, regulating the sugar content to 45-60 g / L, and then adding sodium metabisulfite until the SO2 content is 10-15 mg / L; and finally, sterilizing according to the conventional method, and filling into a bottle to obtain the low-alcohol fermented Kushui rose wine of which the alcohol content is 5-9%(v / v). The fermented Kushui rose wine contains abundant nutrients, is rich in volatile aromatic components, has the effects of regulating the flow of qi, relieving the depressed liver, promoting blood circulation, dissipating blood stasis, regulating menstruation, alleviating pain, protecting against free radicals and resisting aging, and can remove fatigue and promote wound healing.

Composition and method of use for tannin based environmentally benign polymeric coagulants are disclosed. Tannin based coagulants are copolymers of naturally occurring tannins and a cationic monomer. One embodiment of the present invention provides for a composition of a tannin based polymeric coagulant which is comprised of N,N-(dimethylaminoethyl)methacrylate (MADAME) polymerized using t-butylhydroperoxide and sodium metabisulfite. The resulting polyMADAME is converted to hydrochloride and then blended / reacted in an aqueous medium with tannin to obtain a homogenous poly(MADAME)-Tannin composition.The method of use comprises adding an amount of the composition effective for the purpose of clarifying oily wastewater from food and beverage, steel, automotive, transportation, refinery, pharmaceutical, metals, paper and pulp, chemical processing and hydrocarbon processing industries.

The invention relates to a processing method of rose aromatized wine, which comprises the following steps: (1) grading Merlot grape fruit, sufficiently washing with water, crushing, squeezing, and adding sodium metabisulfite to obtain a grape mash; (2) adding Kushui roses, of which calyces are removed, into the grape mash, mixing, removing stems, and crushing to obtain a grape liquid; (3) adding activated pectinase into the grape liquid for impregnation for 36-48 hours, adding activated yeast, and fermenting at 22-27 DEG C by a conventional process; when the primary fermentation finishes after 10-12 days, separating new artesian wine, storing the wine in a closed fermentation tank, and carrying out secondary fermentation under the condition of not removing skin residues; when the secondary fermentation finishes after 60-90 days, removing wine legs, fully storing the wine in a tank for 2-3 months, adding chitosan and bentonite, and clarifying for 2.5 hours, thereby obtaining the clarified wine; and (4) filtering the clarified wine, adding sodium metabisulfite, sterilizing by a conventional process, and bottling. The invention has the advantages of simple production technique, low cost and low pollution.

The invention provides a copper and sulphur separation method for copper-sulphur ore and relates to a method for separating copper from sulphur in copper-sulphur ore flotation rough concentrate. The copper and sulphur separation method for the copper-sulphur ore is characterized in that the steps of a treating process comprise that (1) ore grinding is conducted on copper-sulphur rough concentrate obtained through flotation; (2) after the ore grinding, a sulfur inhibitor selected from sodium sulfite, sodium metabisulfite, sodium bisulfate and sodium thiosulfate is added to the copper-sulphur rough concentrate, and a sulfur inhibition reaction is conducted; (3) a copper selective collector is added, and flotation is conducted; (4) a humate inhibitor is added to a flotation froth product; after an reaction with mixing is conducted, concentration is conducted; and (5) a humate inhibitor is added to a concentration froth product; after an reaction with mechanical mixing, concentration is conducted again, and copper concentrate separated from the sulphur is obtained. The copper and sulphur separation method for the copper-sulphur ore is simple in technology; lime and other highly alkaline inhibitors are not required to be added; required reagents are extensive in source and easy to prepare and add; the prepared reagents are good in flowability, easy to control, and not liable to block pipelines. The copper and sulphur separation method for the copper-sulphur ore is a novel copper and sulphur separation method.

The invention discloses a color-protecting antistaling agent for compound pickled vegetables and a production method thereof. The color-protecting antistaling agent is composed of dehydroacetic acid, sodium acetate, ascorbic acid, sodium erythorbate, sodium phytate, sodium citrate, citric acid, sodium metabisulfite and sodium chloride. The color-protecting antistaling agent is reasonable in components and convenient to manufacture, can effectively improve preserving performance of the pickled vegetables, prolongs guarantee period, is safe, and enables the preserving performance of the pickledvegetables to be improved by over one time compared with the preserving performance of an ordinary marketing product.

The invention relates to a preparation method of a filtrate loss reducer used for drilling fluids. With lignite as the main material, the method first prepares a sulfonated phenol-urea-formaldhyde resin mixture, which is then reacted with an alkaline solution and lignite, thus obtaining a sulfonated phenol-urea-formaldhyde resin modified lignite filtrate loss reducer. The lignite filtrate loss reducer comprises the following reactants by weight: 10%-20% of lignite; 2%-4% of one of or a mixture of NaOH and KOH; 50%-60% of water; 2%-5.5% of phenol; 8%-15% of formaldehyde; 3%-7% of urea; 0.15%-2% of a hydrolyzed acrylonitrile sodium salt; 0.125%-0.5% of polyacrylamide; and 2%-7% of a sulfonating agent (one of or a mixture of sodium sulfite, sodium bisulfite, and sodium metabisulfite).

The fermented soda biscuit and its production process belong to the field of food producing technology. The fermented soda biscuit is produced with flour, yeast, milk powder, sugar powder, maltose, ammonium bicarbonate, palm oil, baking soda, table salt, protease preparation and water, and through mixing the materials, fermentation and roasting. The present invention replaces enzyme preparation for food level sodium metabisulfite, and adopts low temperature roasting, laminating and short fermentation time.

The invention provides complex modified starch which is prepared from the following main ingredients in portion by weight: 100 portions of starch, 1-10 portions of 1-25% sodium hypochlorite, 1-10 portions of 1-25% sodium metabisulfite, 1-10 portions of acetyl oxide, 1-40 portions of 1-40% NaOH and 50-250 portions of water. In the reaction process of the complex modified starch, carboxyl and acetyl groups are introduced to the starch molecules, so the starch molecules have the characteristics of hydrophilicity and lipophilicity simultaneously, have the functions of emulsification and dispersion, and can emulsify water and grease brought in the production process of chocolate products to form a very stable structure.

The invention discloses hyaluronic acid anti-wrinkle essence. The hyaluronic acid anti-wrinkle essence is prepared from a group A, a group B and a group C; the group A includes solvent and a first wetstorage agent; the group B includes a first skin conditioning agent, a first antioxidant agent and a second wet storage agent; the group C includes a second skin conditioning agent, a third skin conditioning agent, a second antioxidant agent, a third antioxidant agent and a third wet storage agent; the first wet storage agent is composed of multiple kinds of sodium hyaluronate; the second skin conditioning agent includes glycerol and dipeptide diaminobutyroyl benzylamide diacetate; the third skin conditioning agent includes water for the third skin conditioning agent, glycoprotein, multiple amino acids, phenoxyethanol, ethylhexylglycerin and sodium metabisulfite; the second antioxidant agent comprises palmitoyl tripeptide-5; the third antioxidant agent comprises acetyl hexapeptide-8; thethird wet storage agent includes acetyl tetrapeptide-4. The hyaluronic acid anti-wrinkle essence can improve skin metabolism, bring elasticity to the skin, reduce the shrinkage degree of the skin, andachieve good effects of removing wrinkles, moisturizing and nursing the skin and delaying aging.

A coating for application to the surface of an interior building product comprises: a resin formulation such as a melamine formaldehyde resin characterized by its ability to strengthen the interior building product when applied as a coating to the building product; and an aldehyde scavenger selected from the group consisting of; tetraethylene pentamine, propionamide, caprolactam, ammonium hydroxide, sodium bisulfate, sodium metabisulfite, ammonium primary phosphate, ammonium secondary phosphate, a combination of ammonium primary phosphate and ammonium secondary phosphate, a combination of ammonium primary phosphate, ammonium secondary phosphate and a sulfite, a polyvinyl alcohol; adipic dihydrazide and a combination of a polyvinyl alcohol and adipic dihydrazide.

The invention relates to a method for rapidly determining total cyanides in cyanide-containing ore pulp, belonging to methods for rapidly determining the total cyanides in the cyanide-containing ore pulp in a cyanidation technology of the gold industry. The method comprises the steps of pretreating ore pulp by using methyl alcohol, shaking well, then adding a copper sulfate solution and a sodium metabisulfite solution, adding a right amount of silver nitrate solution and lead acetate solution, adding ethylene diamine tetraacetic acid (EDTA) and a phosphoric acid solution, distilling in a distillation flask, flushing a distillate guide tube with a small amount of water, taking out a receiving flask, diluting distillate to a marked line with water, and determining the distillate by using a silver nitrate titration method or an isonicotinic acid-pyrazolone spectrophotometric method. The method has the advnatazges that a gap in the determination of the total cyanides in the ore pulp is filled; copper sulfate and sodium metabisulfite are selected as masking agents, so that the interference of thiocyanides and sulphides can be eliminated, and the monitoring for cyanides in a gold carbonitriding and leaching technology is accurately guided; used time is short, filtration is not needed, the influence of the ore pulp on adsorption of the cyanides is avoided, and the working efficiency is improved.

The invention discloses a preparation method of isooctanol polyoxypropylene ether sodium sulfosuccinate diester. The method comprises the following steps of: adding epoxy propane into isooctanol serving as an initiator under the action of a modified DMC (Di Methyl Carbonate) catalyst for undergoing a condensation reaction to obtain isooctanol polyoxypropylene ether; undergoing an esterification reaction on the isooctanol polyoxypropylene ether and maleic anhydride under the catalytic action of a solid super acid S2O8<2-> / ZrO2 to obtain isooctanol polyoxypropylene ether sulfosuccinate diester; and undergoing a sulfonation reaction on the isooctanol polyoxypropylene ether sulfosuccinate diester and a sodium metabisulfite solution under the action of a phase transfer catalyst, and adding a NaOH aqueous solution till the pH of a reactant is 4-7 to obtain the isooctanol polyoxypropylene ether sodium sulfosuccinate diester. The preparation method has the advantages of clean, environmentally-friendly and simple production process, higher permeability and remarkable reduction in foams produced in the using process.

The invention relates to a method for making preserved cherry-tomatoes. The method comprises the following steps of: selecting fruits, grading and piercing; protecting color, hardening, adding a mixed solution of 1.0 percent by submerging amount of calcium chloride and 0.03 percent by submerging amount of sodium metabisulfite and soaking for 3-5h; soaking in sugar: adding 100kg of cherry-tomatoes, 25-35kg of white granulated sugar and 0.03kg of potassium sorbate and standing for 40-50h; secondarily soaking in sugar: adding 0.5kg of citric acid, 0.3kg of sodium citrate and 10kg of white granulated sugar and soaking in sugar for 4-6 day; and drying at 60-65 DEG C for 10-12h and packaging into a finished product. The method avoids peeling or scalding in boiling water, keeps vitamins to the maximum extent and complete and attractive single preserved tomato with sugar dipped, is rich in nutrients and has agreeable taste, simplified production process and decreased production cost.

A freeze-dried powder injection of Duoxitasai is proportionally prepared from Duoxitasai and the auxiliary chosen from alcohol, tween-80, glycerin, Na2EDTA, propanediol, polyethanediol 400, mannitol and sodium pyrosulfite. Its preparing process is also disclosed.

The invention discloses an amino acid injection, commonly known as propranolol, which relates to a pharmaceutical preparation containing 18 kinds of amino acids. The amino acid injection contains the following components per 1,000 milliliters: isoleucine, leucine, methionine, phenylalanine, threonine, tryptophan, valine, glycine, alanine, glutamic acid, aspartic acid, proline, serine, cystine, lysine hydrochloride or lysine acetate, arginine hydrochloride or arginine, histidine hydrochloride or histidine, tyrosine or acetyl tyrosine, and sodium bisulfite or sodium meta-bisulphite. The osmotic pressure ratio of the amino acid injection is lower than 1.8, which effectively reduces the pain for a patient in infusion; the added quantity of antioxidant is small, which can reduce the clinical adverse reactions; and an infusion bottle body is large, which is convenient to mix liquid in clinical application.

The nutritious plumule biscuit and its production process belong to the field of food producing technology. The nutritious plumule biscuit is produced with wheat plumule powder, flour, starch, sugar powder, ammonium bicarbonate, water, palm oil and compound enzyme preparation, and through mixing the materials, fermentation and roasting. The present invention replaces enzyme preparation for food level sodium metabisulfite, and adopts low temperature roasting, laminating and short fermentation time. The nutritious plumule biscuit has less damping, less breaking and long shelf life.

The present invention is directed to a preserved liquid aqueous pharmaceutical composition comprising one or more etherified cyclodextrin derivatives; one or more water-soluble preservatives; preferably selected from the group consisting of sorbic acid or salts thereof, preferably sodium sorbate, potassium sorbate, calcium sorbate; benzoic acid or salts thereof, preferably sodium benzoate; benzalkonium chloride; benzethonium chloride; cetylpyridinium chloride; sodium metabisulfite; sodium acetate; parabenes and salts thereof, preferably methylparabene, ethylparabene, propylparabene, butylparabene, butylparabene sodium; or combinations thereof; and at least one pharmaceutically active compound which is poorly water-soluble, very poorly water-soluble or water-insoluble. The liquid aqueous pharmaceutical composition provides an acceptable solubility of the pharmaceutically active compound, such as pimobendan, in aqueous solution whereby the water-soluble preservatives retain their effectiveness in the presence of the etherified cyclodextrin derivatives allowing the use in an oral administration form.

The invention belongs to the field of chemical industry, and specifically relates to a preparation method for a nonionic oxidized polyethylene wax emulsion using a single emulsifier. The preparation method provided by the invention comprises the following steps of: adding oxidized polyethylene wax (AC-629), a nonionic emulsifier, an emulsification aid, KOH, sodium metabisulfite and deionized water according to a certain weight ratio to a high-pressure reaction kettle, followed by covering and sealing; and emulsifying high-melting-point AC-629 wax at high temperature and high pressure through a one-step method to obtain a microemulsion, wherein the emulsifying temperature is 130-150 DEG C, the emulsifying pressure is 1.5-17.0 MPa, and the amount of the nonionic emulsifier is 18-26% of that of the AC-629 wax; the average particle size of a product is controlled at 35-200 nm through changing emulsifying conditions; and the solid content in the product is controlled at 30-45% through changing the use level of the AC-629 wax. The preparation method provided by the invention is simple in process, only uses one nonionic emulsifier, and lowers the production cost of OPE (oxidized polyethylene) emulsion; and the obtained OPE emulsion is pollution-free and environmentally-friendly.

The invention provides a method for extracting fructus cannabis oligopeptide from a fructus cannabis cake. The method comprises the following steps: collecting the fructus cannabis cake with the oil content of lower than 1%, adding water, regulating the pH value to 9.0, adding sodium metabisulfite, carrying out solid-liquid separation, and collecting the liquid phase; adding a HCl solution into the liquid phase, regulating the pH value to 3.8-4.3, standing, carrying out secondary solid-liquid separation, and collecting the precipitate; adding water, heating to 40-55 DEG C, regulating the pH value to 7.0-9.0, adding a compound protease, carrying out enzymolysis for 3-6 hours, carrying out centrifugal filtration, and collecting the clear solution which is the fructus cannabis oligopeptide solution; and carrying out electrodialysis, concentration and freeze-drying to obtain the fructus cannabis oligopeptide powder. The fructus cannabis cake subjected to press deoiling is used as the raw material, the isoelectric point principle is combined to precipitate the protein, and the compound protease enzymolysis and freeze-drying are performed to obtain the fructus cannabis oligopeptide. The whole process utilizes the pure physical technique, and no chemical component is added; and thus, the method has the advantages of low cost and no environment pollution.