90 results about "Tetrasodium glutamate diacetate" patented technology

The invention relates to rheologically modified cleanser for kitchen heavy oily dirt, and a preparation method thereof. The aerosol cleanser packaged with pressure cylinders and filled with Freon, propane or butane and the like as propellant may cause dangers to the environment and may explode at high temperature. The rheologically modified cleanser for kitchen heavy oily dirt comprises, by weight percent, 0.2-3% of rheological modifier, 0.2-1% of tetrasodium glutamate diacetate, 0.5-8% of fatty alcohol-polyoxyethylene ether, 1-10% of alkyl glycoside, 0.1-6% of sodium fatty alcohol-polyoxyethylene ether sulfate, 1-8% of solvent, 0.5-5% of alkali, 0-0.5% of essence, and the balance of water. The rheologically modified cleanser for kitchen heavy oily dirt is fine in rheological property. With acrylic polymer emulsion as the rheological modifier for the rheologically modified cleanser for kitchen heavy oily dirt, the cleanser is kept to contact with the dirt for a longer time, enough time is provided for the cleanser to permeate the dirt, loss is avoided, and efficiency of the cleanser is increased.

The invention relates to a novel preparation of a green chelating agent glutamic diacetate tetracetic acid metal salt. The preparation comprises the steps of synthesizing GLDA-4Na tetrasodium glutamate diacetate (GLDA-4M) through L-glutamic acid, 2-chloroacetonitrile organic alkali, zinc chloride and sodium hydroxide; carrying out cyanation and hydrolysis of L-glutamic acid to obtain the aqueous solution of the GLDA-4Na; and then carrying out decolorizing and concentrating to obtain the product. According to the preparation, the 2-chloroacetonitrile organic alkali is adopted to replace the common HCN (hydrogen cyanide) in the prior art, so that the use of the extremely toxic substance is reduced, and the produced wastewater can be easily processed; and green chelating agent glutamic diacetate tetracetic acid metal salt has high yield, high purity, and low cost, and is simple in technology, and easy to realize post-treatment to the wastewater, and achieve industrial production.

The invention provides a long-acting bacteriostatic washing soap liquid which is prepared from the following components in percent by weight: 3-5% of a potassium aliphatate soap, 10-13.5% of fatty alcohol-polyoxyethylene ether sodium sulfate, 5-7% of fatty alcohol-polyoxyethylene ether, 4-6% of cocoalkanoylamido propyl betaine, 1.5-2.5% of sodium polyacrylate, 0.2-0.3% of protease, 2-3% of propylene glycol, 0.5-1.5% of tetrasodium glutamate diacetate, 0.20-0.35% of silver ions, 0.1-0.3% of wormwood extract, 1-2% of a vinyl pyrrolidone-vinyl imidazole copolymer, 0.5-2.2% of citric acid, 0.1-1%of a thickener, 0.05-0.2% of a preservative, 0.3-0.6% of essence and the balance deionized water. The long-acting bacteriostatic washing soap liquid provided by the invention still plays a sterilizingand bacteriostatic role to a washed fabric and is excellent in decontaminating effect. The invention also provides a preparation method of the long-acting bacteriostatic washing soap liquid.

Crosslinking of a crosslinkable viscosifying agent and a crosslinking agent may be delayed in a well treatment fluid by incorporated within the fluid a glutamic-N,N-diacetic acid salt, such as a glutamic-N,N-diacetic acid sodium salt like tetrasodium glutamate diacetate. The crosslinking agent may be a zirconium containing crosslinking agent like zirconium (IV) acetyl acetonate. The viscosifying agent may be guar or a guar derivative such as carboxyalkyl guars and hydroxyalkylated guars like carboxymethyl guar, hydroxypropyl guar, hydroxyethyl guar, hydroxybutyl guar and carboxymethylhydroxypropyl guar.

The invention provides a multi-functional long-effect antibacterial laundry detergent which comprises the following components in percentage by weight: 14-18 percent of fatty alcohol polyoxyethylene ether sodium sulfate, 4-6 percent of fatty alcohol polyoxyethylene ether, 2-3 percent of dodecylbenzene sulfonic acid, 0.20-0.35 percent of silver ions, 0.1-0.3 percent of wormwood extract, 1-2 percentof a vinyl pyrrolidone-vinyl imidazole copolymer, 0.3-0.5 percent of cellulase, 2-3 percent of propylene glycol, 0.5-1.5 percent of tetrasodium glutamate diacetate, 1.5-2.5 percent of sodium polyacrylate and 65-75 percent of deionized water. The multi-functional long-effect antibacterial laundry detergent provided by the invention still plays bactericidal and antibacterial effects on washed fabrics, and the washed fabrics are soft and hard to discolor. The invention further provides a preparation method of the multi-functional long-effect antibacterial laundry detergent.

The invention provides a preparation method of a green chelating agent tetrasodium glutamate diacetate. The method specifically comprises the steps as follows: sodium glutamate and chloroacetic acid are subjected to an SN2 bimolecular nucleophilic substitution under an alkaline condition at a certain temperature to produce a tetrasodium glutamate diacetate water solution. Chloroacetic acid and a caustic soda liquid are dropwise added to a kettle simultaneously, the pH value of the reaction system is kept in the range of 9-12 by controlling the addition speed of the caustic soda liquid, and meanwhile, negative pressure of 0-minus 0.005 MPa is established. Sodium glutamate and chloroacetic acid which are soluble in water are used as raw materials, a process method of partially neutralizing sodium glutamate and removing water out of the reaction system during the reaction is adopted, so that reaction substrates always keep higher reaction activity, and the reaction yield and reactant conversion rate are increased; the reaction cycle is short, the production process is simple, and the yield can reach 96% or above; the method is safe, environmentally friendly and high in operability, does not produce toxic byproducts or wastewater, can realize energy saving and emission reduction, is low in cost and facilitates large-scale industrial production.

The invention discloses a fruit-vegetable cleaning agent, which is prepared from the following components in parts by weight: 40 to 70 parts of sodium percarbonate, 2 to 15 parts of fatty acid methyl ester sulfonate, 2 to 15 parts of sucrose fatty acid ester, 0.1 to 3 parts of soyabean lecithin, 10 to 25 parts of bamboo charcoal powder, 10 to 30 parts of sodium alga acid, 1 to 5 parts of sodium citrate, 0.1 to 2 parts of tetrasodium glutamate diacetate, 1 to 10 parts of tetrasodium glutamate diacetate, 1 to 5 parts of nisin, 1 to 5 parts of citric acid, 0.1 to 1 part of manganese sulfate, 5 to 20 parts of anhydrous sodium sulfate, 2 to 15 parts of baking soda, 1 to 8 parts of sodium chloride, and 1 to 5 parts of essence. The fruit-vegetable cleaning agent provided by the invention can be fully and effectively removing oil contamination, pesticide residues, bacteria and heavy metal ions on the surfaces of the fruits and vegetables, inhibits the generation of the bacteria, is poisonless and harmless to a human body, and is green in cleaning; the cleaning agent is good in water solubility and easy to wash down, and cannot bring secondary pollution to the fruit and vegetables. A preparation method of the fruit-vegetable cleaning agent is conventional and simple without pollutant emission.

The invention provides a process for producing tetrasodium glutamate diacetate through a continuous method.Production is conducted through a continuous reactor.The process includes the following steps that A, a sodium glutamate saline solution, a sodium cyanide solution and a formaldehyde solution are used as raw materials and fed into a first reaction kettle to react through a heat exchange system according to the flow speed, and generated ammonia gas is collected at the same time; B, feed liquid generated after reaction in the first reaction kettle is discharged from the bottom of the kettle and directly enters a second reaction kettle to continue to react, and ammonia gas generated in the second reaction kettle is collected at the same time; C, feed liquid reacting in the second reaction kettle is discharged from the bottom of the kettle and enters a storage tank to be subjected to decoloration, filtration and concentration regulation so that a tetrasodium glutamate diacetate solution can be obtained.By means of the process, tetrasodium glutamate diacetate can be continuously produced, the quality of the obtained product is good, the production stability is good, control is easy, and by-products generated by kettle type reaction can be avoided.

The invention provides a neutral concentrated laundry detergent. The neutral concentrated laundry detergent is prepared from the following components in parts by weight: 50 to 65 parts of deionized water, 8 to 22 parts of sodium ethoxylated alkyl sulfate (AES), 9 to 12 parts of fatty alcohol-polyoxyethylene ether (AEO7), 4 to 8 parts of sodium dodecyl benzene sulfonate (LAS), 4 to 6 parts of propylene glycol, 2 to 3 parts of lauramidopropyl betaine (CAB), 1.4 to 2.7 parts of sodium hydroxide, 1 to 2 parts of lauric acid, 1 to 2 parts of oleic acid, 0.5 to 1 part of potassium hydroxide, 0.2 to0.5 part of essence, 0.2 to 0.4 part of tetrasodium glutamate diacetate (GLDA), 0.1 to 0.2 part of protease, 0.05 to 0.1 part of Kathon, 0.05 to 0.2 part of a dye and 0.5-1 part of a composite Trametes ochracea extract. The invention also provides a preparation method of the neutral concentrated laundry detergent. The neutral concentrated laundry detergent provided by the invention does not harm hands and clothes, and has good decontamination, antibacterial and softening properties.

The invention provides a fabric detergent containing dodecyl dipropylene triamine and having a mite killing function. The detergent comprises the following components in parts by weight: 2 to 5 partsof dodecyl dipropylene triamine, 3 to 6 parts of Chrysanthemum morifolium Ramat extract, 8 to 12 parts of polyethoxylated lauryl alcohol, 2 to 3 parts of kushenin, 4 to 6 parts of coconut oil polyoxyethylene ether methyl ammonium chloride, 3 to 5 parts of tridecanol polyoxyethylene ether, 0.2 to 0.5 part of tetrasodium glutamate diacetate, 0.4 to 1 part of a maleic acid-acrylic acid copolymer, with the balance being deionized water, wherein the total mass part of the components is 100 parts. According to the invention, through scientific combination of key components, an acaricidal effect is organically combined with the detergent, mite killing is simultaneously completed during normal washing and decontamination, and operation is simplified; and the fabric detergent is convenient to use and has the functions of sterilization, fabric color protection and fabric color crossing prevention.

The invention relates to a method for measuring the content of a magnesium element in an aluminum alloy. A compound masking reagent adopts a triethanolamine solution of iminodisuccinic acid, dimercaprol and tetrasodium glutamate diacetate, and triethanolamine reacts with Al<3+> and Fe<3+> to obtain a stable complex under an acidic environment, the formed complex is colorless and easily soluble, the iminodisuccinic acid and Cu<2+>, Ca<2+> and Zn<2+> form a stable complex; tetrasodium glutamate diacetate is strong in complexing power with rare earth element ions; dimercaprol is strong in complexing power with nickel and manganese ions, and is poor in complexing power with other ions. Thus, the compound masking reagent formed by multiple components is used for performing complexing masking on each element except for the manganese ions in the aluminum alloy in a targeted manner, and thus the detection accuracy is improved. The method for measuring the content of the magnesium element in the aluminum alloy, provided by the invention, is accurate in measuring result, and remarkable in end point, and has the environmental-friendly effects in the used reagent without pollution.

The invention discloses a cleaning fluid for removing rust, a preparation method and application thereof, and belongs to the technical field of chemical rust removal. The cleaning fluid comprises 2%-10% of an organic acid, 0.5%-4.5% of an organic acid salt, 10%-25% of a chelating agent, 2%-6% of a permeation aiding solvent, 0.15%-0.25% of a corrosion inhibitor and the balance of water, wherein theorganic acid is 2-hydroxy propane-1,2,3-tricarboxylic acid and / or 2,3-dihydroxy succinic acid, the organic acid salt is 8-hydroxyquinoline citrate or 2,3-sodium tartrate, and the chelating agent is tetrasodium glutamate diacetate. The cleaning fluid is high in scale dissolving rate, high in descaling rate, low in corrosion rate, good in biodegradability is good and particularly suitable for removing the rust in the oil field.

The invention belongs to the field of daily chemical products, and particularly relates to a sterilizing, color-protecting and cross-color-preventing concentrated laundry detergent and a preparation method thereof. The sterilizing, color-protecting and cross-color-preventing concentrated laundry detergent provided by the invention is prepared from a surfactant, tetrasodium glutamate diacetate, propylene glycol, lauric acid, oleic acid, polyethyleneimine, a dye transfer inhibitor, potassium hydroxide, sodium hydroxide, a bacteriostatic agent, protease, Kathon, wheat germ oil, jojoba oil, a dye,an essence and water. The sterilizing, color-protecting and cross-color-preventing concentrated laundry detergent provided by the invention is a neutral formula, is milder in pH value of hand skin, does not corrode fibers on the surface of clothes, and is suitable for hand washing and machine washing; various typical stains such as dust, protein and greasy dirt can be effectively removed, and thefabric is effectively softened; polyethyleneimine in the formula is compounded with Flosoft CCP, and clothes are bright in color as new through film forming color protection and suspension wrapping color crossing prevention. In addition, diclosan added in the formula has a strong antibacterial effect of 99%, so that the health of users is protected.

The invention provides a disinfecting and sterilizing concentrated detergent containing lauryl hydroxyethyl dimethyl ammonium chloride. The disinfecting and sterilizing concentrated detergent comprises the following components in parts by weight: 2 to 5 parts of lauryl hydroxyethyl dimethyl ammonium chloride, 3 to 5 parts of polyhexamethylene guanidine, 10 to 15 parts of polyethoxylated fatty alcohol, 12 to 16 parts of Goldbert alkoxide, 10 to 12 parts of oxo-alcohol ethoxylate, 0.2 to 0.5 part of tetrasodium glutamate diacetate, 0.4 to 1 part of maleic and acylic acid copolymer, and the balance of deionized water, wherein the sum of parts by mass is 100 parts. The detergent has the advantages that by adding lauryl hydroxyethyl dimethyl ammonium chloride and polyhexamethylene guanidine, the disinfecting and sterilizing functions are realized; the cell walls with negative charges are attracted by the positive charges of cations, the cell walls and cell membranes are promoted to thoroughly deform and crack, the propagation and survival abilities of the cells are lost, and the cells die, so as to reach the disinfection and sterilization purposes.

The invention relates to a green biodegradable soil heavy metal cadmium activating agent. The green biodegradable soil heavy metal cadmium activating agent comprises, by weight, 3.5-31.5 parts of tetrasodium glutamate diacetate, 19.2-21.2 parts of citric acid, 7.5%-37.3 parts of potassium chloride, 10-18 parts of alpha-(2-methyl-1-oxo-2-propenyl)-omega-hydroxy-poly(oxy-2-ethanediyl), 5-9 parts ofa polyoxyethylene-polyoxypropylene block copolymer, 12-22 parts of sodium alga acid and 3-5 parts of calcium chloride. The green biodegradable soil heavy metal cadmium activating agent can promote sedum plumbizincicola to absorb heavy metal cadmium within the growth cycle of the sedum plumbizincicola, and the absorption rate of the heavy metal cadmium can be increased.

The invention discloses a bacteriostasis sanitary napkin. The bacteriostasis sanitary napkin comprises a surface layer and the surface layer is spray-coated with an antiseptic. The antiseptic comprises, by weight, 0.5-1.5 parts of benzethonium chloride, 1-5 parts of glycerin, 0.1-0.2 parts of tetrasodium ethylenediamine tetraacetate, 0.1-0.2 parts of tetrasodium glutamate diacetate, 0.1-0.5 parts of a surfactant and 80-100 parts of water. The bacteriostasis sanitary napkin can effectively inhibit bacteria, has a soft cotton surface, does not stimulate skin, realizes long-term effective bacteriostasis in use and can protect female health.

The invention proposes a long-acting antibacterial mild hand sanitizer. The long-acting antibacterial mild hand sanitizer comprises the following components: 0.5-1% of tetrasodium glutamate diacetate,8-11% of fatty alcohol polyoxyethylene ether sodium sulfate, 3.5-5.5% of cocamidopropyl betaine, 2-3% of coconut oil fatty acid diethanolamide, 4-5.5% of alcohol ether glucoside, 1.5-2.2% of glycerol, 0.3-0.6% of C12-C13 alkanol lactate, 0.1-0.15% of silver ion, 0.05-0.1% of wormwood extract, 0.05-0.15% of a preservative, 0.5-1.5% of a thickener, 0.1-0.3% of essence and the balance of deionized water. The long-acting antibacterial mild hand sanitizer proposed by the invention is mild and non-irritating and has a long-acting antibacterial effect. The invention further proposes a preparation method of the long-acting antibacterial mild hand sanitizer, and the stability of the effective components is increased through specific addition steps.

The invention discloses a detergent for automobiles, which is prepared from the following raw materials in parts by weight: 80 parts of water, 3-5 parts of sodium dodecyl benzene sulfonate, 6-10 parts of sodium di-n-octyl sulfosuccinate, 3-5 parts of cocoylaminopropyl betaine, 0.1-0.5 part of sodium gluconate, 0.3-0.7 part of tetrasodium glutamate diacetate and 0.3-0.7 part of ethylene diamine tetraacetic acid tetrasodium salt. The detergent for automobiles has favorable stain removal effect, has good effect on removing light stains and heavy stains, can well clean the automobile body, windows and other parts, and can not damage the automobile.

The invention discloses a dyeing method for blended fabric. The method comprises the steps of 1) adding magnesium sulfate, diglycolamidic acid, carboxymethylcellulose, HACC and vegetable dyes in deionized water in sequence, mixing even and heating to 55oC; 2) Adding tetrasodium glutamate diacetate, alkyl sodium sulfonate, triethylenetetramine, mica powder in sequence, and mixing even, heating to 65oC; 3) Soaking the fabric in the dye vat for 25min; 4) Drying the soaked fabric at 80oC; 5) Soaking the dried fabric in clean water and rinsing for 25min; and 6) Getting out the rinsed fabric and make it dry naturally. The dyed fabric is excellent in color fastness and good in dyeing uniformity, free of color tone.

The invention discloses a blood stain remover, and belongs to the technical field of fine chemical industry. The blood stain remover is prepared by mixing isomeric fatty alcohol-polyoxyethylene ether,fatty alcohol-polyoxyethylene ether, fatty acyl diethanol amine, triethanolamine, tetrasodium glutamate diacetate, 3-methoxy-3-methyl-1-butanol, propylene glycol, sodium polyacrylate, proteolytic enzyme, lipase, cellulase, anhydrous calcium chloride and deionized water in parts by weight. The pH value of the blood stain remover is controlled between 9.0 and 11.0. The invention further provides apreparation method of the blood stain remover. The hydrolytic protease in the blood stain remover provided by the invention is not easy to decompose lipase and cellulase, has high stability and a goodcleaning effect, and is convenient to use and store.

The invention discloses an application of complexing agents in enhancing ornamental quality of rye grass with an aim to enhance growth of seedlings and synthesis of chlorophyll and carotenoids. The complexing agents refer to GLDA (tetrasodium glutamate diacetate) and IDS with the concentration of 6-9mmol kg<1>; the complexing agents GLDA and IDS with respective concentration of 9mmol kg<1> are used for increasing total chlorophyll and carotenoid content; the complexing agents GLDA and IDS with respectively concentration of 6mmo kg<1> are used for increasing the total chlorophyll and carotenoid content; the complexing agents of GLDA and IDS with concentration of 3mmol kg<1> are used for increasing total chlorophyll and carotenoid content. The GLDA or IDS different in concentration are added to a turf medium, and enhanced regulation on synthesis of the GLDA or IDS on the chlorophyll and carotenoid of the rye grass is realized; technical support for green quality of the rye grass can be further improved.

The invention discloses a CBD hemp essence emulsion. The CBD hemp essence emulsion comprises the following raw materials in parts by weight: 50-80 parts of water, 10-15 parts of aloe vera leaf juice,5-8 parts of polysorbate, 2-4 parts of glycerol, 3-9 parts of sodium ascorbyl phosphate, 2-8 parts of phenoxyethanol, 1-5 parts of tocopheryl acetate, 2-6 parts of an acrylates / alkyl acrylate crosspolymer, 10-15 parts of a hemp leaf extract, 1-3 parts of essence, 2-5 parts of ethylhexylglycerin, 3-6 parts of tetrasodium glutamate diacetate, 1-4 parts of sodium hydroxide and 1-5 parts of sodium hyaluronate. The aloe vera leaf juice, the polysorbate, the hemp leaf extract, the ethylhexylglycerin and the tetrasodium glutamate diacetate are added into a formula of the CBD hemp essence emulsion; the cannabis sativa leaf essence relieves and repairs cutin, nourishes skin, enables the skin to be tender and smooth; the aloe juice reduces oil gloss, increases the soft and moist degree of the skin,preserving moisture and moistens the skin, enables the skin to be moisturized and plump, and effectively relieves the skin. The CBD hemp essence emulsion is suitable for all kinds of skin people, andhas wide market prospects.

The invention belongs to the technical field of waste fly ash treatment, and particularly relates to a chelating agent for waste incineration fly ash and a preparation method of the chelating agent. The heavy metal chelating agent for the waste incineration fly ash is prepared from the following raw materials in parts by weight: 20 to 40 parts of crosslinked starch grafted polyacrylamide, 20 to 30 parts of tetrasodium glutamate diacetate, 10 to 20 parts of methylglycine diacetic acid, 5 to 10 parts of citric acid, 3 to 5 parts of isopropanolamide, 5 to 10 parts of a dispersing agent and 30 to 50 parts of deionized water. The prepared heavy metal chelating agent for the waste incineration fly ash is good in chelating effect, a chelate generated by the chelating agent and heavy metal is good in stability, heavy metal ions are not prone to be separated out when the chelate is placed in strong acid for a long time, and meanwhile the chelate is very stable when the chelate is placed in the natural environment for a long time.

The invention relates to rheologically modified cleanser for kitchen heavy oily dirt, and a preparation method thereof. The aerosol cleanser packaged with pressure cylinders and filled with Freon, propane or butane and the like as propellant may cause dangers to the environment and may explode at high temperature. The rheologically modified cleanser for kitchen heavy oily dirt comprises, by weight percent, 0.2-3% of rheological modifier, 0.2-1% of tetrasodium glutamate diacetate, 0.5-8% of fatty alcohol-polyoxyethylene ether, 1-10% of alkyl glycoside, 0.1-6% of sodium fatty alcohol-polyoxyethylene ether sulfate, 1-8% of solvent, 0.5-5% of alkali, 0-0.5% of essence, and the balance of water. The rheologically modified cleanser for kitchen heavy oily dirt is fine in rheological property. With acrylic polymer emulsion as the rheological modifier for the rheologically modified cleanser for kitchen heavy oily dirt, the cleanser is kept to contact with the dirt for a longer time, enough time is provided for the cleanser to permeate the dirt, loss is avoided, and efficiency of the cleanser is increased.

The invention discloses a formula for enlarging the sterilization range and improving sterilization ability of nisin, relates to the related field of nisin and aims to solve the problems that nisin can only have an inhibition function on gram-positive bacteria when used separately at present. The formula is a solution prepared from a nisin solution, a tetrasodium glutamate diacetate solution, a gluconic acid solution, a gluconate solution, a potassium cinnamate solution and a citric acid solution; the pH of the solution ranges from 2.5 to 7.5. The formula has the characteristics of being safe, economical and practical and is applicable to bacteriostasis and sterilization operation procedures of food, catering, daily chemicals, cultivation and other industries. The formula is widely applied to the field of food, medicine, daily chemicals and the like. Cinnamic acid and potassium cinnamate are novel food additives and have a good bacteriostasis function.

The invention discloses a special automobile cleaning agent. The special automobile cleaning agent is prepared from the following raw materials in parts by weight: 85 parts of water, 3-5 parts of sodium N-oleoyl-N-methyl taurate, 6-10 parts of dioctyl sulfosuccinate sodium salt, 3-5 parts of 1,2-propylene glycol, 0.1-0.5 part of sodium gluconate, 0.3-0.7 part of tetrasodium glutamate diacetate and 0.3-0.7 part of ethylenediaminetetraacetic acid tetrasodium salt. The special automobile cleaning agent disclosed by the invention has a good dirt removal effect and has a good effect of eliminating both light dirt and heavy dirt, and parts, such as an automobile body and windows, of an automobile can be well cleaned without damaging the automobile.

The invention provides a cultivation substrate based on lead and cadmium contaminated soil, and relates to the technical field of heavy metal contaminated soil remediation. The cultivation substrate based on the lead and cadmium contaminated soil is prepared by the following steps: naturally air-drying heavy metal contaminated soil, and carrying out sieving; performing elution on the sieved soil by using a eluent, namely a mixture of one or more selected from aspartate diethoxysuccinic acid, Iminodisuccinic acid and tetrasodium glutamate diacetate and citric acid; performing elution on the soil subjected to the elution with the eluent by using clean water, of which the volume is equal to the volume of the soil, for 2 times; and then, mixing the soil subjected to the elution with the cleanwater with vermiculite, humic acid and a compost so as to obtain the cultivation substrate. According to the cultivation substrate provided by the invention, the heavy metals are stabilized by using the eluent, so that the cultivation substrate can be directly used in ecological restoration in mining areas.

The invention discloses a method for continuously synthesizing tetrasodium glutamate diacetate through a tubular reactor, and relates to the technical field of tetrasodium glutamate diacetate preparation. The method comprises the following steps that 1, a monosodium glutamate salt solution and a hydroxy acetonitrile solution are continuously injected into the tubular reactor, and a compound shown as a formula I (please see the formula in the description) is generated; 2, the generated compound shown as the formula I is hydrolyzed to generate tetrasodium glutamate diacetate and a by-product-ammonia gas under the action of sodium hydroxide, the generated ammonia gas is exhausted, and the etrasodium glutamate diacetate solution is obtained. According to the method, hydrocyanic acid is avoided, the product quality is easy to control, safety and environmental friendliness are achieved, and industrialized production can be achieved; in addition, by-products generated in a kettle reaction can be avoided, the production efficiency is high, labor is greatly saved, and automation control is easy to achieve.