29 results about "Carbohydrazide" patented technology

There are provided a processing solution containing an alkali compound, water, and a corrosion inhibitor, in which the amount of dissolved oxygen one week after the preparation of the processing solution is 0.2 mg / L or more and 1.5 mg / L or less, and the corrosion inhibitor is at least one selected from the group consisting of N,N-diethylhydroxylamine, 1-thioglycerol, 1-amino-4-methylpiperazine, carbohydrazide, methylethylketoxime, erythorbic acid, and salts thereof, a method for manufacturing the processing solution, and a method for processing a substrate and a method for manufacturing a semiconductor device using the processing solution.

This invention relates to a near-infrared low-potential electrochemiluminescence dual-ligand stabilized gold nanoclusters, their preparation method, and applications. The method uses chloroauric acid as the gold source and thiomalic acid and sodium citrate as reducing and stabilizing agents, respectively, in a two-step synthesis. First, Au is reduced online using thiomalic acid. 3+ Water-soluble gold nanoclusters were prepared using a novel method. These nanoclusters were then incubated with sodium citrate, and based on the ligand exchange principle, gold nanoclusters co-coated with thiomalic acid and sodium citrate were synthesized. The raw materials required for this invention are readily available and all possess good water solubility. The synthesis apparatus is simple, the conditions are mild, and the operation is safe. The resulting dual-ligand-coated gold nanoclusters exhibit good stability and produce low-potential near-infrared electrochemiluminescence in the long-wavelength region in an aqueous system. This overcomes the limitation of most current electrochemiluminescent materials requiring hydrazine hydrate or carbazide as a co-reactant. Using a non-toxic tert-butylamine-borane co-reactant, low-potential electrochemiluminescence radiation of 0.57V in the near-infrared region was generated.

The present application relates to a kind of water-soluble carbohydrazide derivative and its preparation method, the method for detecting ion or amino acid, belong to organic small molecule probe technical field.The present application introduces different pyridyl on the hydrazine group of carbohydrazide, obtains a kind of pyridyl substituted carbohydrazide derivative.Compared with existing carbohydrazide compound, the recognition function of pyridyl substituted carbohydrazide derivative provided by the present application has been expanded and regulated, can be used for Cu 2+ , Hg 2+ , Ca 2+ , Cd 2+ , Zn 2+ , AcO ‑ , HSO4 ‑ And glutamic acid (Glu) / L-Asp, lysine (Lys) / arginine (Arg) recognition detection.The water-soluble carbohydrazide derivative provided by the present application as molecular probe, its structure is stable, synthesis method is simple, has the ability of responding to multiple substrates, and water-soluble, has wide application prospect.

The invention discloses a formononetin derivative containing piperidine-4-carbohydrazide as well as a preparation method and application of the formononetin derivative, and belongs to the technical field of pesticide synthesis. According to the invention, a piperidine-4-carbohydrazide group with excellent activity is introduced into the structure of formononetin, a series of formononetin derivatives of piperidine-4-carbohydrazide are synthesized, and the activity of the synthesized formononetin derivatives containing piperidine-4-carbohydrazide in inhibiting plant pathogens is tested. It is found that the formononetin derivative of piperidine-4-carbohydrazide synthesized by the invention can effectively inhibit plant pathogenic fungi, especially rhizoctonia solani.

The invention relates to the field of neutralizing hydrogen sulphide and light mercaptans in oil industry fluids using chemical neutralizing reagents and is applicable in the oil and gas industry for cleaning and neutralizing oil transport tanks, pipelines, heat exchangers, fractionating and distillation columns, reactors, filters, settling tanks, gas scrubbers, air coolers, temporary storage tanks and any other receptacles and piping used in oil and gas processing. The proposed hydrogen sulphide scavenger for light and volatile petroleum products contains 95% ethyl alcohol solution, carbohydrazide, grade A 25% ammonia solution, GD anti-foaming agent, 3% hydrogen peroxide solution, concentrated soap (pH=14) and demineralized water in a given ratio of components. The present invention provides a composition that reduces or eliminates the presence of hydrogen sulphide in various fluids.

The present invention addresses the problem of providing a method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide with high safety and high yield. The present invention relates to a method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide or a salt thereof via 3-methyl-1, 2, 4-thiadiazole-5-carboxamide or a salt thereof without the use of toxic carbon monoxide, and more particularly, to a method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide or a salt thereof via 3-methyl-1, 2, 4-thiadiazole-5-carboxamide or a salt thereof. According to the present invention, it is possible to provide a safe and high-yield method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide, which is an important synthetic intermediate for non-azonetin, which is useful as a drug for the treatment of sex hormone-dependent diseases.

The present invention aims to provide a method for producing 3-methyl-1,2,4-thiadiazole-5-carbohydrazide safely and in high yield. The present invention relates to a method for producing 3-methyl-1,2,4-thiadiazole-5-carbohydrazide or a salt thereof, via a compound represented by the formula (2):wherein R is a C1-4 alkyl group, which is a novel compound, or a salt thereof. According to the present invention, a safe and high-yielding production method of 3-methyl-1,2,4-thiadiazole-5-carbohydrazide, which is an important synthetic intermediate for fezolinetant useful as a medicament for the treatment of sex hormone-dependent diseases, can be provided.

The invention belongs to the technical field of high-performance polyurethane elastomers, and discloses a super-strong and super-tough thermosetting polyurethane elastomer capable of being self-repaired and recycled as well as a preparation method and application of the super-strong and super-tough thermosetting polyurethane elastomer. Polycaprolactone is used as a soft segment, 4, 4 '-dicyclohexylmethane diisocyanate is used as a hard segment, dibutyltin dilaurate is used as a catalyst, oxalyl dihydrazine and carbohydrazide are used as chain extenders, and 3-aminophenylboronic acid is used for blocking, so that a polyurethane straight chain is generated through reaction; and carrying out vacuum drying and dehydration to obtain the super-strong and super-tough thermosetting polyurethane elastomer which has boric acid ester bonds and can be self-repaired and recycled. The polyurethane elastomer forms a double dynamic network of hydrogen bonds and boric acid ester bonds, dissociation and recombination under thermal stimulation can be achieved, and the self-repairing performance of the elastomer is achieved. Meanwhile, strong multiple hydrogen bond interaction is formed between the two hydrazide chain extenders, so that a sample is endowed with excellent energy dissipation capability, and excellent mechanical properties are achieved.

This invention discloses a method for preparing a ternary dynamic glycopeptide hydrogel bio-ink, comprising the following steps: dissolving methacrylamide gelatin, aldehyde-modified hyaluronic acid, hydrazide-modified gelatin, and a photoinitiator together in a solvent and mixing them evenly to obtain the bio-ink. This bio-ink constructs a dynamic covalent cross-linking network through reversible acylhydrazone bonds formed between aldehyde-modified hyaluronic acid and hydrazide-modified gelatin, providing a remodelable three-dimensional microenvironment for cells. Simultaneously, the photocrosslinking properties of methacrylic anhydride-modified gelatin are introduced to rapidly solidify and maintain overall shape stability during the printing stage, providing a remodelable cellular microenvironment during subsequent in vitro culture. This establishes an organoid culture platform with both good printability and excellent cell compatibility, providing a reliable material basis for subsequent drug screening and functional studies.

The invention relates to the technical field of chemical synthesis, in particular to a tetranuclear dysprosium-based metal-organic framework material and a preparation method and application thereof. A chemical formula of the tetranuclear dysprosium-based metal-organic framework material is [Dy4 (dbm) 2 (H2L1) 2 (HL2) 2 (CH3O) 2]. 6CH3OH, H4L1 is N '2, N' 6-bis ((E)-3, 5-di-tert-butyl-2-hydroxybenzylidene) pyridine-2, 6-dicarbohydrazide, H3L2 is (E)-N '-(3, 5-di-tert-butyl-2-hydroxybenzylidene)-6-(hydroxymethyl) pyridine hydrazide, and Hdbm is dibenzoylmethane; the tetranuclear dysprosium-based metal-organic framework material crystal belongs to a monoclinic system and a C2 / c space group. The preparation method of the chiral phosphine nickel (II) complex is simple and convenient to operate, high in purity and good in reproducibility. The tetranuclear dysprosium-based metal-organic framework material disclosed by the invention is good in thermal stability, shows good catalytic performance in a cycloaddition reaction for synthesizing cyclic carbonate through CO2 catalytic conversion, and has a good application prospect.

The application discloses a steam enhanced SNCR system and a use method thereof, relates to the technical field of flue gas denitration treatment, and comprises the following steps: S1, a first conveying control unit is used for conveying main steam to a coupling mixer and controlling the flow of the main steam; S2, a second conveying control unit is used for conveying ammonia water and controlling the flow of the ammonia water; S3, a coupling processing unit is used for mixing the main steam and the ammonia water to form a mixture; S4, the second conveying control unit is used for conveying an efficiency improver and controlling the flow of the efficiency improver, and the coupling processing unit is used for mixing the main steam and the ammonia water mixture with the efficiency improver to form a target mixture in a superheated state; and S5, the coupling mixer is used for conveying the target mixture into a lance, and the lance is used for spraying the target mixture into an incinerator. According to the application, water is not added to dilute the ammonia water, and the steam consumption is greatly reduced; the medium-temperature and medium-pressure steam is used to replace the medium-temperature and high-pressure steam in other schemes, so that the requirement for steam quality is reduced; and when the oxygen content is too high, a hydrazine carbohydrazide solution is started to enhance the denitration reaction efficiency.

The present invention addresses the problem of providing a method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide with high safety and high yield. The present invention relates to a method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide or a salt thereof via a compound represented by formula (2) (in the formula, R represents a C1-4 alkyl group) or a salt thereof, which is a novel compound. According to the present invention, it is possible to provide a safe and high-yield method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide, which is an important synthetic intermediate for non-azonetin, which is useful as a drug for the treatment of sex hormone-dependent diseases.

The invention discloses a benzothiazole acylhydrazone zinc ion fluorescent probe as well as a preparation method and application thereof. The probe can overcome the defects of complex synthesis, low sensitivity, long response time and the like of an existing fluorescent probe for detecting zinc ions. The preparation method of the probe comprises the following steps: introducing an acylhydrazone group containing oxygen and nitrogen into a 2 # site of benzothiazole to synthesize 1, 3-benzothiazole-2-carbohydrazide, and carrying out condensation reaction on the 1, 3-benzothiazole-2-carbohydrazide and 1-hydroxy-2-naphthaldehyde under a liquid phase condition to prepare the probe. The benzothiazole acylhydrazone zinc ion fluorescent probe prepared by the invention can identify zinc ions by naked eyes in a DMSO / HEPES buffer solution (V: V = 9: 1, the concentration of the HEPES buffer solution is 10 mmol / L, and the pH value is 7.4) solution, a 1: 1 complex is formed, and the response time is about 6 s. Meanwhile, the probe shows better selectivity and stronger anti-interference capability in the process of detecting the zinc ions, and the detection limit is 9.8 * 10 <-9 > mol / L. The pH is in a range of 4-12, the probe has good detection performance on zinc ions, and trace detection of the zinc ions in a water sample can be realized in actual environmental application.

The invention provides anti-aging gel as well as a preparation method and application thereof, and belongs to the technical field of cosmetics. Enabling tetrahydrogeraniol to react with succinic acid and cell penetrating peptide in sequence to prepare a penetration enhancer; the preparation method comprises the following steps: reacting hyaluronic acid with an oxidizing agent to prepare oxidized hyaluronic acid; the preparation method comprises the following steps: reacting carboxyethyl chitosan with carbohydrazide to prepare carbohydrazide modified carboxyethyl chitosan; the preparation method comprises the following steps: embedding notoginsenoside, resveratrol, vitamin E and coenzyme Q10 through lipidosome to prepare active lipidosome; dissolving carbohydrazide modified carboxyethyl chitosan in water, adding a penetration enhancer and active lipidosome, uniformly mixing, then adding an oxidized hyaluronic acid aqueous solution, and stirring to form gel, thereby obtaining the anti-aging gel. The prepared anti-aging gel has good moisturizing, anti-aging, anti-oxidation and anti-inflammatory effects, tissue metabolism and repair are accelerated, and meanwhile, the anti-aging gel is good in stability, good in transdermal absorption effect, low in irritation and high in safety and has wide application prospects.

Provided are a treatment liquid which not only has excellent removability of a metal component and a residue to be removed but also has excellent anticorrosion properties for a metal containing a Cu atom, a method for producing a treatment liquid, a method for treating a substrate using the treatment liquid, and a method for manufacturing a semiconductor device.SOLUTION: Provided are a treatment liquid containing an alkali compound, water, and a corrosion inhibitor, in which the amount of oxygen dissolved after a lapse of one week from the preparation of the treatment liquid is 0. 2mg / L or more and 1. 5mg / L or less, and the corrosion inhibitor is at least one selected from the group consisting of N, N-diethylhydroxylamine, 1-thioglycerol, 1-amino-4-methylpiperazine, carbohydrazide, methyl ethyl ketoxime, erythorbic acid, and salts thereof, a method for producing a treatment liquid, and a method for treating a substrate and a method for manufacturing a semiconductor device using the treatment liquid.SELECTED DRAWING: None

The invention is applicable in the oil and gas industry for cleaning and neutralizing oil transport tanks, pipelines, heat exchangers and other receptacles and piping. A hydrogen sulphide scavenger for neutralizing and cleaning gas lines contains demineralized water, ethyl alcohol, carbohydrazide, 25% ammonia solution, and concentrated soap having a pH=14. The invention makes it possible to more effectively neutralize and clean oil and gas processing equipment of residues of products of petrochemical operations.

The application discloses a hydrazide derivative-based carbon dot and a preparation method and application thereof, relates to the technical field of antibacterial materials, and discloses a preparation method, which comprises the following steps: taking a hydrazide derivative as raw material, and preparing a hydrazide derivative-based carbon dot through a one-step hydrothermal method; the hydrazide derivative is at least one of phenylhydrazine, methylhydrazine, isophthalic dihydrazide, thio-diacid hydrazide, salicylic hydrazide, acetic hydrazide, 3-pyridine carbohydrazide, benzhydrazine, p-carboxyphenylhydrazine and carbon hydrazide; the application also protects the hydrazide derivative-based carbon dot prepared through the above method and the application of the hydrazide derivative-based carbon dot in the preparation of antibacterial materials and antibacterial drug resistance materials. The application has the beneficial effect that 10 kinds of hydrazide derivative-based carbon dots are prepared through a simple one-step hydrothermal method with 10 kinds of hydrazide derivatives as precursors; the 10 kinds of hydrazide derivative-based carbon dots all have antibacterial activity, and the carbon hydrazide-based carbon dot shows excellent antibacterial activity and can effectively eradicate biofilms.

The present invention aims to provide a method for producing 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide safely and in high yield. The present invention relates to a method for producing 3-methyl-1,2,4-thiadiazole-5-carboxamide or a salt thereof without using toxic carbon monoxide gas. According to the present invention, a safe and high-yielding production method of 3-methyl-1, 2, 4-thiadiazole-5-carbohydrazide, which is an important synthetic intermediate 21 for fezolinetant useful as a medicament for the treatment of sex hormone-dependent diseases, can be provided.

The invention discloses a platinum-rhodium alloy chemical plating solution, a preparation method and a preparation method of a platinum-rhodium alloy film, and belongs to the technical field of chemical plating. The chemical plating solution comprises platinum salt, rhodium salt, a reducing agent, a first alcohol amine complexing agent, a second polymeric alcohol amine complexing agent, a phosphate stabilizer and an additive. According to the invention, a compound of alkylol amine and polymeric alkylol amine is selected as a complexing agent, carbohydrazide is taken as a reducing agent, the proper reduction capability of carbohydrazide ensures the moderate deposition rate, and the problem of rough coating caused by too fast reduction or low deposition efficiency caused by too slow reduction is avoided. The compounding of the phosphate stabilizer effectively inhibits the spontaneous decomposition of the plating solution, prolongs the service life of the plating solution, and ensures the stability of the process. According to the platinum-rhodium alloy plating solution, the sulfonic acid inner salt containing ammonium ions or amino is used as an additive and can be adsorbed on the surface of an electrode, the deposition behavior of metal atoms is regulated and controlled, and all the components cooperate with one another to jointly guarantee that a high-quality platinum-rhodium alloy plating layer can be obtained within a limited concentration range.

The invention belongs to the technical field of high value-added chemical and catalyst production and water pollution treatment, and particularly relates to a continuous flow photoelectrocatalysis method for synchronously removing nitrate and carbohydrazide in wastewater and recovering ammonia. The CuFe2O4-coated CuSnO3 / Ti integrated electrode is used as a bifunctional photoelectrode, and NH3 production by reduction of nitrate at the cathode and oxidative degradation of carbohydrazide at the anode can be realized. Under the conditions of visible light irradiation and external bias voltage, a (-) NO3 RRCOR (+) flow cell system of the constructed CuFe2O4-coated CuSnO3 / Ti bifunctional electrode catalyzes reaction for 0.5 hour under the RHE potential of-0.8 V vs, the highest NH3 yield is about 3.48 mM h <-1 > cm <-2 >, carbohydrazide is completely oxidized and degraded, and simultaneous treatment of wastewater containing NO3 <-> and carbohydrazide is realized to cooperate with NH3 production. Low-energy-consumption pollutant removal and high-efficiency resource utilization are realized. The flow cell system constructed based on the bifunctional CuFe2O4 and CuSnO3 / Ti integrated photoelectrode has the advantages of being simple, convenient, efficient, high in selectivity, high in visible light utilization rate, environmentally friendly, free of pollution and capable of saving energy.

The invention discloses a steam-enhanced SNCR (selective non-catalytic reduction) system and a use method thereof, and relates to the technical field of flue gas denitration treatment.The use method comprises the following steps that S1, main steam is conveyed to a coupling mixer through a first conveying control unit, and the flow of the main steam is controlled; s2, a second conveying control unit conveys ammonia water and controls the flow of the ammonia water; s3, the coupling treatment unit mixes the main steam and ammonia water to form a mixture; s4, a second conveying control unit conveys a synergist and controls the flow of the synergist, and a coupling treatment unit mixes the main steam and ammonia water mixture with the synergist to form an overheated target mixture; and S5, the coupling mixer conveys the target mixture into a spray gun, and the spray gun sprays the target mixture into the incinerator. The ammonia water is not diluted by adding water, so that the steam consumption is greatly reduced; medium-temperature medium-pressure steam is used for replacing medium-temperature sub-high-pressure steam in other schemes, and the requirement for steam quality can be lowered. When the oxygen content is too high, the carbohydrazide solution is started to enhance the denitration reaction efficiency.

This invention discloses an oxygen-doped carbon nitride / ytterbium oxide (OCN / Yb₂O₃) heterojunction photocatalyst, its preparation method, and its applications, belonging to the field of photocatalytic materials technology. The process involves thermally treating a carbapenemhydrazine to obtain the intermediate HTIC; then, HTIC is uniformly mixed with Yb₂O₃ and a water-soluble molten salt, followed by molten salt thermal treatment to obtain the target catalyst OCN / Yb₂O₃. This method is simple, the molten salt can be washed and recovered with water, it is environmentally friendly, and has low cost. The OCN / Yb₂O₃ photocatalyst obtained by this invention exhibits a broad spectral response, high carrier separation and migration efficiency, and excellent all-water splitting activity under visible light, showing broad application prospects.

The invention provides non-animal-derived carboxyethyl chitosan hydrogel for injection as well as a preparation method and application of the non-animal-derived carboxyethyl chitosan hydrogel, and belongs to the technical field of hydrogel. The preparation method comprises the following steps: modifying bacterial source chitosan with acrylic acid, and coupling the modified bacterial source chitosan with silk fibroin peptide to prepare silk fibroin peptide / non-animal source carboxyethyl chitosan; oligomeric hyaluronic acid is oxidized, cholesterol is modified and used for coating bisabolol, squalene and asiatic acid, and oxidized hyaluronic acid modified lipidosome is prepared; the non-animal-derived carboxyethyl chitosan hydrogel for injection is prepared by mixing the non-animal-derived carboxyethyl chitosan with carbohydrazide modified gelatin, silk fibroin peptide / non-animal-derived carboxyethyl chitosan and oxidized hyaluronic acid, has good moisturizing, antibacterial and hemostatic properties, provides a moist environment for wound surfaces, prevents microbial infection, promotes granulation tissue formation, and has a good application prospect. The drug release rate is changed by matching with the change of the pH value of the skin surface, the wound healing process is shortened, and the high water content of the hydrogel is combined with the moisturizing property of the chitosan to prevent secondary injury caused by wound adhesion.

The invention belongs to the technical field of probes, and particularly relates to a fluorescence and mass spectrum double-sensibilization labeled probe as well as a preparation method and application thereof. The probe takes benzimidazole as a mother ring and carbohydrazide as a reaction group, and comprises a probe 1 and a probe 2, the probe 1 is iodinated 4-(1, 3-dimethyl-benzimidazole-2-yl) benzoyl hydrazine d0, the chemical structural formula of the probe 1 is shown in the specification, and X is H; the probe 1 is deuterated iodinated 4-(1, 3-dimethyl-benzimidazole-2-yl) benzoyl hydrazine d6, the probe 2 is deuterated iodinated 4-(1, 3-dimethyl-benzimidazole-2-yl) benzoyl hydrazine d6, the chemical structural formula is shown in the specification, and X is D. The method disclosed by the invention can be used for rapidly, accurately and sensitively labeling and detecting the active carbonyl compound, is particularly suitable for separation and detection of trace and trace micromolecular active carbonyl compounds in a complex system, can be used for fluorescence labeling and analysis of various fatty aldehydes in the research fields of life analysis, food analysis and the like, and has a wide application prospect.

The invention belongs to the field of metallurgy, and discloses a chromium and silicon co-removal method for a sodium modified vanadium solution and a method for preparing high-purity vanadium through composite impurity removal of the sodium modified vanadium solution. The method comprises the following steps: selecting a specific silicon removal agent and a specific chromium removal agent to remove silicon and chromium based on the pH value of the sodium vanadium solution, and when the pH value is 8-9, firstly adding a first silicon removal agent to remove silicon, and then adding a first chromium removal agent to remove chromium; when the pH is 9-10, sequentially adding a first chromium removal agent and a second chromium removal agent for primary chromium removal and secondary chromium removal, and then adding a first silicon removal agent for silicon removal; when the pH value is 10-11, firstly adding a second silicon removal agent to remove silicon, and then sequentially adding a second chromium removal agent and a first chromium removal agent to remove chromium for the first time and removing chromium for the second time; when the pH value is 11-12, a second chromium removal agent is firstly added to remove chromium, then a first silicon removal agent is added to remove silicon, the first silicon removal agent is aluminum sulfate, the second silicon removal agent is sodium metaaluminate, the first chromium removal agent is carbohydrazide, and the second silicon removal agent is sodium hydrosulfide. The method is high in chromium and silicon removal rate, small in vanadium loss and low in cost.

This invention relates to the field of fruit color-changing technology, specifically to a novel application and method of a tetrahydroβ-carboline derivative for promoting fruit color-changing in crops. The tetrahydroβ-carboline derivative is specifically (1S,3S)-N'-(4-chlorobenzylmethyl)-1-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carbohydrazide. The tetrahydroβ-carboline derivative can promote fruit color-changing, allowing fruits to be harvested earlier, improving fruit quality, and increasing economic benefits. Furthermore, the tetrahydroβ-carboline derivative used in this invention is relatively safe for fruits and has not caused any adverse effects.

The invention discloses polyurea synergistically enhanced by multiple hydrogen bonds and a cross-linked structure as well as a preparation method and application thereof.The polyurea is prepared from a component A and a component B. The component A is prepared from the following components in parts by mass: 12-16 parts of a flatting agent, 12-16 parts of a defoaming agent and 200-220 parts of modified MDI; the component B is prepared from the following components in parts by weight: 810 to 820 parts of benzocaine modified polytetrahydrofuran, 3 to 5 parts of carbohydrazide, 0.5 to 1.5 parts of 2, 4, 6-triaminopyrimidine, 40 to 60 parts of dimethyl sulfoxide and 10 to 14 parts of N, N-dimethylformamide, and multiple hydrogen bonds of polyurea are controlled by the adding proportion of carbohydrazide; the cross-linked structure of the polyurea is controlled by the adding proportion of the 2, 4, 6-triaminopyrimidine. The polyurea elastomer disclosed by the invention has excellent strength, toughness, wear resistance, puncture resistance and drop hammer impact resistance, so that the polyurea elastomer can be widely applied to various impact protection fields.

The invention relates to the field of neutralizing hydrogen sulphide and light mercaptans in oil industry fluids using chemical neutralizing reagents and can be used for cleaning and neutralizing oil transport tanks, pipelines, heat exchangers and other receptacles and piping. A hydrogen sulphide scavenger for heavy and bituminous petroleum products contains: demineralized water, ethyl alcohol, carbohydrazide, GD anti-foaming agent, 25% ammonia solution, concentrated soap having a pH=14, and 46% sodium hydroxide solution. The invention makes it possible to more effectively neutralize dangerous compounds in apparatus during downtime, while also cleaning the surfaces of said apparatus of heavy and bituminous residues of products of petrochemical operations.