35 results about "Ethanedithiol" patented technology

The invention discloses a high refractive resin containing silicon and a preparation method of the resin. The high refractive dual curing resin containing silicon comprises a sulfur epoxy acrylate chain segment and a silicon urethane acrylate chain segment. The preparation method comprises the following steps: firstly, reacting ethanedithiol with epichlorohydrin to generate epoxy sulfur, and then reacting epoxy sulfur with crylic acid to generate sulfur epoxy acrylate double ester or sulfur epoxy acrylic acid ester; grafting a silicon urethane acrylate prepolymer with an NCO functional group at the side chain, wherein the obtained resin comprises two structures: one structure contains three acrylate double bonds and can be solidified by ultraviolet light free radicals, and the other structure contains two acrylate double bonds (solidified by ultraviolet light free radicals) and an epoxy group (solidified by ultraviolet light cations or hotly cured), and can be dually solidified by ultraviolet light. The resin has high refractive index, and good adhesive performance and heat resistance after being cured, and can be used in ultraviolet-curable adhesives and coatings.

The invention discloses a preparation method for antimony sulfide films. The method is mainly characterized in that antimony sulfide is added into a mixed solution of 1,2-ethylenediamine and 1,2-ethanedithiol according to the proportion of 0.01-0.03 g of the antimony sulfide to per 11 milliliter of the mixed solution of the 1,2-ethylenediamine and the 1,2-ethanedithiol and is dissolved in the mixed solution, and electro-deposition liquid is obtained; two transparent electrodes are vertically arranged and placed into an electrolytic cell containing the electro-deposition liquid for cathode constant potential electro-deposition, the voltage is 1.5-8 V, the electroplating time is 5-30 min, uniform and compact films are deposited on cathodes after completion of electro-deposition; the electro-deposited films are subjected to heat treatment at 300-400 DEG C under nitrogen atmosphere and are naturally cooled to the room temperature, and the antimony sulfide films are obtained. The preparation method is simple, short in reaction time, high in productivity, suitable for batch production in factories and high in practicability, and the prepared antimony sulfide films can be applied to catalysis and solar cells and has broad application prospects in the field of photoconductive materials.

A preparation method of a nickel sulfide nanosheet array is disclosed. The method comprises the following steps: dissolving ethene diamine and ethanedithiol according to the volume ratio of 4: 1 to obtain a hydrosulfamine solution, coating one side surface of 1*1 cm<-2> foamed nickel with 0.5 ml of the hydrosulfamine solution, and let the foamed nickel coated with the hydrosulfamine solution standat normal temperature and at normal pressure for 24 h; placing a sample on a heating plate and heating at 300 DEG C for 60 s so as to obtain the nickel sulfide nanosheet array. The coating amount is0.20-0.30 mL per square centimeter. By the adoption of a normal pressure liquid-phase sulfuration method for preparation of the nickel sulfide nanosheet array, the preparation technology of the nickelsulfide nanosheet array is greatly simplified, consumption of experimental materials is greatly lowered, and OER overpotential is 260 mV when electric current density is 20 mA/cm<2>.

The invention relates to the technical field of chemical synthesis, in particular to a preparation method of p-hydroxyacetophenone. The preparation method comprises the following steps: 1, adding a certain amount of anisole, anhydrous aluminum trichloride and o-dichlorobenzene into a reactor, adding a certain amount of acetyl chloride after the temperature of the raw materials is reduced to 0-10 DEG C, and carrying out acetylation reaction at 0-10 DEG C for 1-3 hours; 2, adding a certain amount of a sulfide demethylation reagent into a system obtained in the step 1, and carrying out demethylation reaction for 1-3 hours at the temperature of 30-40 DEG C; 3, reducing the temperature of an obtained solution to 15-30 DEG C, and then adding hydrochloric acid to adjust the pH value of the solution to 1-2; and 4, distilling, crystallizing, centrifuging and drying to obtain p-hydroxyacetophenone. According to the method, anisole is used as a starting raw material, anhydrous aluminum trichloride and acetyl chloride are used as acetylation reagents, and ethanedithiol is used as a demethylation reagent, so that the generation of by-products is greatly reduced, the product yield is increased,the obtained product is high in purity and low in impurity content, the operation is simplified, and the production efficiency is greatly improved.

The invention relates to a reagent for cutting peptides, in particular to a reagent for cutting sulfydryl-containing peptides from resins. In addition, the invention also relates to a method for cutting sulfydryl-containing polypeptides from resins, which is suitable for industrial production of sulfydryl-containing polypeptides. The reagent for cutting sulfydryl-containing polypeptides from resins comprises the following components in parts by weight: 85-95 parts of trifluoroacetic acid, 1-5 parts of triisopropylsilane, 1-4 parts of mercaptoundecanoic acid, 1-4 parts of phenol and 1-2 parts of water. The invention has the advantages that because ethanedithiol is a chemical reagent which is not produced at home, the cost of the ethanedithiol is expensive, and the ethanedithiol has effluvial smell in the reaction process; in the invention, mercaptopropionic acid is used for replacing the conventional ethanedithiol, thus the production cost can be lowered, the environment pollution is greatly reduced, and simultaneously, the effect of the peptide cutting reaction can also be improved; and meanwhile, the invention has the characteristics of low procurement cost, reduction of the three wastes, good crude peptide quality and the like, and is very suitable for industrial production of sulfydryl-containing polypeptides.

The invention discloses a preparation and use method of a mercury ion detection material based on aggregation-induced emission properties. The preparation method comprises the following steps: mixing9-anthraldehyde and 1, 2-ethanedithiol in a CHCl3 solution, adding elemental iodine into the mixed solution, magnetically stirring the mixture at room temperature, then, adding Na2S2O3 and a NaOH solution to terminate the reaction, and carrying out purifying to obtain the faint yellow solid mercury ion detection material. The mercury ion detection material can be used for preparing test paper fordetecting high-concentration mercury ions and handheld equipment probes for detecting trace mercury ions. The method has the advantages of being low in detection line, sensitive in reaction, good in response line type, high in anti-interference capability and small in medicament consumption.

The invention discloses a preparation method for a rice special fertilizer for improving the utilization rate of the fertilizer. The method comprises the following steps: stirring sodium nitrate, ammonium bicarbonate, kainite, plant ash, potassium chloride, potassium polyphosphate, fly ash, and sepiolite powder to obtain a first material; stirring pig manure, coconut shell charcoal powder, wollastonite powder, manganese sulfate, gypsum powder and ferric sulfate to obtain a second material; stirring a peanut protein, mica powder and an ethanol solution, adding sodium dodecyl sulfate and 1,2-ethanedithiol, continuing stirring, raising the temperature, continuing stirring, and performing cooling to obtain a third material; and under the stirring conditions, adding the first material into thesecond material, adjusting the temperature, performing stirring, performing granulation, performing cooling, and injecting the third material for coating to obtain the rice special fertilizer. The rice special fertilizer obtained by the method provided by the invention uniformly provides nutrients for rice, has a lower fertilizer releasing rate, can be effectively absorbed by the rice to meet thenutrient requirement for the rice growth, and has an extremely high utilization rate and a significantly increased yield.

A molecular probe comprises two arsenic atoms and at least one cyanine based moiety. A method of producing a molecular probe includes providing a molecule having a first formula, treating the molecule with HgOAc, and subsequently transmetallizing with AsCl₃. The As is liganded to ethanedithiol to produce a probe having a second formula. A method of labeling a peptide includes providing a peptide comprising a tag sequence and contacting the peptide with a biarsenical molecular probe. A complex is formed comprising the tag sequence and the molecular probe. A method of studying a peptide includes providing a mixture containing a peptide comprising a peptide tag sequence, adding a biarsenical probe to the mixture, and monitoring the fluorescence of the mixture.

The invention relates to a preparation method of desogestrel, which comprises the following specific steps: by taking 11 alpha-hydroxy-18-methyl-estra-4-ene-3, 17-diketone) as a starting material, carrying out 3-keto protection by using ethanedithiol, carrying out 17-keto protection by using imine, removing ethanedithiol from lithium liquid ammonia, carrying out IBX oxidation, carrying out wittig alkylenation reaction, carrying out acidolysis deprotection, and carrying out ethynylation by using acetylene potassium, so as to obtain the desogestrel.

The present invention provides a (1S, 3aR, 6aS)-octahydro-cyclopenta [c] pyrrole-1-carboxylic acid synthesis intermediate-compound b and a preparation method thereof, the method is as follows: a compound a is reacted with 1,2-ethanedithiol in a suitable solvent in the presence of an acid catalyst to obtain the compound b; the reaction conditions are as follows: reaction temperature is 10-50 DEG C, the suitable solvent is selected from ethyl acetate, methylene chloride, toluene, or tetrahydrofuran, the acid catalyst is selected from methyl phenylsulfonic acid or boron trifluoride diethyl etherate; and the reaction formula is shown in the specification. Through use of the new compound b, use of dangerous reagent sodium-hydrogen, and poisonousreagent carbon disulfide and methyl iodide and the like can be avoided in the subsequent synthesis method of the compound 1, the raw materials are cheap and readily available, operation is easy, and the yield of the compound 1 prepared by the method is equal to the yield of the compound 1 prepared by the method reported in original patent document WO02 / 18369.

The invention provides a hydrophilic anthracene fluorescent dye and a synthesis method thereof. By introducing a sulfonic acid group and a difluoro substituent group, the hydrophilicity and stabilityof the anthracene fluorescent dye are improved. The synthesis method mainly comprises the following steps: reacting halogenated benzaldehyde with a phenyl Grignard reagent to generate a benzhydrol derivative; oxidizing an alcoholic hydroxyl group into a keto carbonyl group to obtain a benzophenone derivative with a phenolic hydroxyl group protecting group; converting the keto carbonyl group into dithioketal by using ethanedithiol for protection; carrying out fluorination by using a fluorine reagent to obtain an anthrone difluoride compound; conducting reacting by using a lithium reagent to achieve conversion into a lithium Grignard reagent; conducting oxidizing to obtain benzophenone; removing a protecting group from benzophenone, and carrying out cyclization reaction under an acidic condition; and carrying out sulfonation reaction on the obtained fluorinated fluorescent dye to obtain the fluorinated fluorescent dye.

The invention discloses lubricating oil for part assembly and a manufacturing process of the lubricating oil. The lubricating oil is characterized by being prepared from the following raw materials inparts by weight: 17-21 parts of talcum powder, 11-17 parts of stearic acid, 10-16 parts of benzyl alcohol, 14-18 parts of butylene oxide, 12-17 parts of an antioxidant, 12-16 parts of nitric acid, 10-15 parts of hydrofluoric acid, 12-18 parts of sulfurized isobutylene, 11-16 parts of silica, 4-8 parts of magnesium powder, 10-15 parts of trichloromethane, 8-16 parts of aminosilicone oil, 5-10 parts of graphene, 15-19 parts of glyceryl behenate, 7-13 parts of sodium citrate, 6-12 parts of sorbitol and 4-8 parts of ethanedithiol. The lubricating oil for part assembly is prepared from various simple and easily available raw materials, is suitable for lubrication and noise reduction during part assembly and operation, is prepared by a simple process with a technology of mixing and dispersing raw materials at high speed, is suitable for large-scale popularization and use, and can produce higher economic benefits.

The invention discloses a preparation method of a sulfur antimony selenide thin film, wherein the preparation method comprises the steps that: antimony selenide is added into a mixed solution of ethanediamine and ethanedithiol to prepare an electro-deposition solution, and constant-potential electro-deposition is carried out in the electro-deposition solution through conductive glass, so that a layer of prefabricated film is deposited on the surface of an electrode on the conductive glass positioned on a cathode; and then the conductive glass deposited with the prefabricated film is subjected to heat treatment in nitrogen atmosphere to obtain the antimony sulfide selenide thin film. According to the preparation method of the antimony selenide thin film, the deposition thickness and the chemical composition of substances deposited on the conductive glass can be accurately controlled; the sulfur antimony selenide thin film obtained by the method also has the advantages of uniform thickness, difficulty in falling, simple preparation process, easiness in operation and the like; and meanwhile, the forbidden band width of the Sb2SexS3-X thin film can be regulated and controlled by changing the adding content of Sb2Se3 in the electro-deposition solution, and then the performance of a device applying the thin film prepared through the method is improved.

The polymer-supported chelating agent is polyisobutylene having a thiol-thioether terminal group. The polymer-supported chelating agent is made by reaction of the terminal carbon double bond of polyisobutylene with 1,2-ethanedithiol in a one-step click reaction, resulting in PIB functionalized with a thiol-thioether sequestering group. In use, the polymer-supported chelating agent is added to a biphasic solvent system containing a transition metal in solution for removal of the transition metal by liquid/liquid extraction. The transition metal is chelated or sequestered by the chelating agent and removed in a nonpolar organic phase, such as heptane.

The invention provides a novel low-temperature resistant lubricant formulation. Raw materials in the formulation include, by weight, 5%-15% of base oil, 1%-5% of lubricant additive, 1%-10% of graphite, 5%-15% of bentonite, 3%-9% coupling agent, 2%-3% of nonylphenol polyoxyethylene ether, 1%-5% of hexachlorocyclopentadiene, 11%-19% of ethanedithiol, 5%-7% of propolis extract, and 3%-5% of seaweed extract. Novel low-temperature resistant lubricant prepared by the formulation has strong low temperature resistance.

The invention discloses an interior wall mildew prevention coating. The coating is prepared from, by weight, 4-8 parts of ergosterol, 2.5-6.4 parts of rosin, 5-10 parts of terpene resin, 2.5-6.4 parts of ethyl chrysanthemumate, 1.5-4.6 parts of 1,2-ethanedithiol, 1.4-2.8 parts of ethyl vanillin, 3.7-6.2 parts of pesticide emulsifier 600-2, 2.5-5 parts of an acrylic resin modified casein film forming agent and 1.5-3.6 parts of chlorosulfonyl isocyanate. Compared with present products, the coating disclosed in the invention has the following advantages: addition and mixing of ergosterol and ethyl vanillin make the coating have a good antibiosis effect and strong mildew resistance; terpene resin, 1,2-ethanedithiol and chlorosulfonyl isocyanate are cheap, so the coating is cheap; and formaldehyde and VOCs are not used in the raw materials, so the coating has the characteristics of energy saving and environmental protection.