429 results about "Propargyl alcohol" patented technology

The invention discloses a sulfur-containing bis-imidazoline type carbon dioxide corrosion inhibitor and a preparation method thereof. The corrosion inhibitor comprises the following components in percentage by weight: 20-50 percent of sulfur-containing bis-imidazoline quaternary ammonium salt, 1-5 percent of nonionic surfactant, 40-70 percent of low molecular alcohol solvent and 5-10 percent of alkynol, wherein a sulfur-containing bis-imidazoline compound has a general formula of a structure which is shown in the specification; the number of carbon atoms in R of the formula is 5 or 8; the nonionic surfactant is fatty alcohol-polyoxyethylene ether or alkylphenol ethoxylate; the low molecular alcohol solvent is methanol, ethanol, isopropanol or ethylene glycol; and the alkynol is propargyl alcohol or hexynol. In the invention, the sulfur-containing bis-imidazoline compound which is generated through dehydration between dicarboxylic acid and polyamine molecule, dehydration reaction in the molecule and further reaction with the sulfur-containing compound is adopted; the molecule contains a plurality of active adsorption centers such as two diazo five-membered heterocyclic rings, a sulfur-containing group and the like; and a formed organic adsorption membrane has better protection effect on carbon steel.

The invention discloses vehicle high-methanol content gasoline, relates to carbon-containing fuels and solves the problems of difficult low-temperature startup, serious metal corrosion, inadequate power and susceptibility to generating precipitates of the conventional methanol gasoline. The vehicle high-methanol content gasoline comprises the following components in part by volume: 70 to 86 partsof methanol, 14 to 30 parts of gasoline component oil, 0.5 to 1 part of cosolvent, 0.1 to 0.2 part of antiseptic and rubber swelling inhibitor, 0.2 to 0.3 part of detergent and 0.01 to 0.05 part of coloring agent. The cosolvent consists of isobutanol, isopropyl ether, 2-isobutanol and tetrahydrofuran, the antiseptic and rubber swelling inhibitor consists of propargyl alcohol, butanedioic acid, hexakis(dihydrogen phosphate), N-methyl morpholine, cyclohexane and dimethyl phthalate, the detergent consists of normal propyl alcohol, isopropanol, limonene and cyclohexane, and the coloring agent is Sudan IV solution. The vehicle high-methanol content gasoline has high startability, high dynamic performance, high environmental protection performance, obvious anticorrosion effect and high safety.

The invention discloses an amphiphilic triblock copolymer with acid sensitivity and a preparation method and an application thereof. The preparation method comprises the following steps of: modifying polyethylene glycol with a hydroxyl group at the end to enable the structure of polyethylene glycol to contain a diazido ethyl diacetal end group, namely polyethylene glycol contains the diazido ethyl diacetal group at the end; carrying out ring-opening polymerization on cyclic ester monomers by utilizing propargyl alcohol as an initiator and stannous caprylate as a catalyst to obtain biodegradable polyester with alkynyl at the single end; and finally, under the action of a 'click' chemical catalyst and ligand, carrying out 'click' chemical reaction on polyethylene glycol containing the diazido ethyl diacetal group at the end and the biodegradable polyester with alkynyl at the end to obtain the biodegradable amphiphilic triblock copolymer with acid sensitivity. The biodegradable amphiphilic triblock copolymer with acid sensitivity has good biocompatibility, biodegradability and acid sensitivity, and can be used as a drug carrier.

The invention discloses a simple stereoselective synthesis method of sex pheromones of hyphantria cunea, which relates to epoxypropane compounds. The sex pheromones of hyphantria cunea III[(9S,10R)-9,10-epoxy-(3Z,6Z)-3,6-heneicosenediene] and IV[(9S,10R)-9,10-epoxy-(3Z,6Z)-3,6-heneicosenetriene] are prepared from cheap and readily available 2-propargyl alcohol serving as raw materials by eight steps with high efficiency, high enantioselectivity and high yield, wherein the total yield of (9S,10R)-III is 36 percent; the total yield of (9S,10R)-IV is 33 percent; and enantiomer excess e is more than 99 percent. The method has the advantages that: the operation and separation of each step are simple; the yield is high; all the adopted reagents are common reagents which are cheap and readily available; and the production line is short. The method is suitable for industrial production.

The invention relates to a hydrochloric acid pickling corrosion inhibitor, mainly applied to the field of hot galvanizing pickling pretreatment, cleaning of boilers and other industrial equipment and the like. The hydrochloric acid pickling corrosion inhibitor comprises the following components by weight percent: 0-20 percent of urotropine, 0-10 percent of rosin amine polyoxyethylene ether, 0-10 percent of additive (nonionic surfactant combination), 0-5 percent of alkynol compound (one or two of propargyl alcohol, butynol and pentynol) and the balance of water. The invention has simple preparation and low cost and is mainly characterized in that firstly, the hydrochloric acid pickling corrosion inhibitor has no foam or low foam; secondly, the hydrochloric acid pickling corrosion inhibitor has high corrosion inhibition rate and fog inhibition rate both in a wider temperature range and in a wider acidity range; and thirdly, after pickling, the surface of steel has favorable conditions, is lustrous and does not have the phenomena of over-corrosion and the like. When the hydrochloric acid pickling corrosion inhibitor is used, the addition quantity of the corrosion inhibitor can be properly regulated according to the actual temperature and acidity of the pickling.

The invention relates to a method for preparing 1-propene-3-sultone, and the technical field of preparation of organic materials. The method mainly comprises the processes of addition, acidation and cyclization: a, addition, namely an addition reaction of propargyl ethanol and alkali metal sulphite or hydrosulfite is carried out in an aqueous solution, the molar ratio of the propargyl alcohol to the alkali metal sulphite or the hydrosulfite is 1:1-10, and inorganic acid or organic acid is added to stop reaction after the addition reaction is ended; and b, a product of the addition reaction isseparated out, and then the separated product is subjected to cyclization and separation to obtain a 1-propene-3-sultone product. The PST product can be refined. The method overcomes the defect of the prior art, and has the remarkable advantages of unique method, simple manufacturing process, easy operation, mild reaction conditions, cheap and easily-obtained raw materials, higher yield, good selectivity, high and stable quality of products, few three wastes, lower cost, remarkable economic benefit, and the like.

Process for the preparation of unsaturated 4,5-allene ketones by reaction of tertiary propargyl alcohols with alkenyl alkyl ethers or ketals in the presence of aliphatic sulfonic acids or sulfonic acid salts.

The invention discloses mono-functional group-containing multilevel branched polyethylene glycol and its synthesis method. With a molecular weight of 2,000-1,000,000, the multilevel branched polyethylene glycol has a general structure formula as the following, wherein, R stands for OH or OCH2CH2CN or OCH2CH2CH2NH2 or Br or N3 or OCH2CHO or OCH2CH2COOH or OCH2CH2CONH2 or OCH2CH=CH2 or propargyl alcohol, or X is methyl or ethyl, z is the number of X group, n1, n2, n3... respectively expresses the polymerization degree of a 1st, 2nd, 3rd... branched chain and is an integer between 10 and 500, and the branching series can be not less than 2 and the branched chain number of each branching level is not less than 2. The mono-functional group of the mono-functional group-containing multilevel branched polyethylene glycol in the invention is disposed at an end point, so that an exact branched structure and molecular weight can be adjusted simply and accurately, and the synthesis time of branched polyethylene glycol can be saved.

The invention provides a synthetic method for an American white moth sex pheromone. 2-propargyl alcohol which is cheap and easy to obtain is used as a raw material, the American white moth sex pheromone a (9S,10R)-9,10-epoxy-(3Z,6Z)-3,6-heneicosadiene is synthesized in a high enantioselectivity and high yield, and enantiomer excess e.e. achieves 99% or more. According to the synthetic method for the American white moth sex pheromone, the production process is safer, the costs are low, the selectivity is higher, and the synthetic method is more energy-saving and environmentally friendly.

The invention discloses a diverting acid acidification corrosion inhibitor and a preparation method thereof, belonging to the technical field of oilfield chemicals. According to the mass percentage of the present invention, the components of the corrosion inhibitor are quaternary ammonium salt, octylphenol polyoxyethylene ether, propynyl alcohol, butynediol, methylpentynyl alcohol, cinnamaldehyde, methanol and water. The present invention is compound alkylpyridine, quinoline, benzyl chloride, ethylene glycol, water, react and synthesize quaternary ammonium salt, and carry out with octylphenol polyoxyethylene ether, methanol, propynyl alcohol, cinnamaldehyde, water, etc. Compounding, the present invention aims to overcome the disadvantages of poor compatibility and poor corrosion inhibition effect in the existing corrosion inhibitor technology in the use of oil field diverting acid. The process route is simple, the synthetic product has no three wastes pollution, the cost is low, the raw materials are easy to purchase, and the advantages are convenient to use and the like.

The invention provides a method for preparing propargyl alcohol by using a micro-structural reactor, which comprises the steps of by taking a simple Grignard reagent as a raw material, carrying out gas-liquid Grignard exchange reaction on the simple Grignard reagent and acetylene gas to generate a high-quality acetylene-based magnesium bromide Grignard reagent, carrying out nucleophilic addition reaction on the obtained acetylene-based magnesium bromide Grignard reagent and an electrophilic reagent in a continuous flow condition, and carrying out hydrolysis, separation and refining on the product to obtain a substitution propargyl alcohol product. The method provided by the invention has the advantages that the operation is simple, the raw material and the reagent are simple, cheap and easily available, the process is continuous, rapid and controllable, the condition is mild, the product has good selectivity and industrial production can be realized.

The invention discloses vehicle used environment protective methanol gasoline with high adaptability, and in the methanol gasoline, methanol accounts for 5 percent to 30 percent of fuel, additive accounts for 0.1 to 0.5 percent, and cosolvent accounts for 0 to 8 percent. The additive consists of two parts of methanol modifying agent and methanol gasoline compound additive. The methanol modifying agent includes normal butyl alcohol of 45 to 55 percent, UOP4 of 5 to 10 percent, chlorinated paraffin wax of 7 to 15 percent, ethylene glycol of 10 to 15 percent, PPG of 10 to 15 percent, and propargyl alcohol of 5 to 12 percent. The methanol gasoline compound additive includes toluene or xylene (including orthoxylene, metaxylene and paraxylene) of 35 to 50 percent, hydroxyl diphenylamine of 2 to 10 percent, benzene triazole fatty acid ammonium salt of 5 to 15 percent, N, N1-binary salicylic acid propylene diamine of 0.01 to 0.1 percent, dimmer acid of 3 to 8 percent, alkyl salicylic acid chromium of 0.05 to 0.1 percent, and isobutyl alcohol of 25 to 45 percent. The methanol gasoline of the invention has extremely high adaptability, and is suitable for being used for vehicles of any model. The methanol gasoline actually belongs to economical environmental protection type green fuel, has good social benefit and economic benefit, and is suitable for promotion and application in a wide range.

The present invention discloses anti-corrosion heat-dissipation paint. The anti-corrosion heat-dissipation paint consists of the following raw materials in parts by weight: 4-6 parts of phthalate ester, 17-20 parts of a styrene-maleic anhydride copolymer, 6-10 parts of propargyl alcohol, 90-100 parts of tetrahydrofuran, 4-7 parts of graphene, 16-20 parts of nano silica, 0.2-0.3 parts of a silane coupling agent KH560, 700-800 parts of dimethyl formamide, 4-5 parts of sodium nitride, 0.04-0.05 parts of aluminium trichloride, 1.6-2 parts of a 2-3% sodium ascorbate solution, 1.8-2 parts of a 2-3% copper sulfate solution, 110-120 parts of high density polyethylene, 0.3-1 parts of 8-hydroxyquinoline copper, 1-2 parts of fulvie acid, 2-3 parts of calcium propionate, 0.6-1 parts of zinc pyrithione, and 4-6 parts of polyisobutylene. According to the anti-corrosion heat-dissipation paint, the 8-hydroxyquinoline copper, the fulvie acid, the calcium propionate and the zinc pyrithione are added, so that a good collaborative effect can be achieved, and anti-corrosion and antibacterial effects can be realized, thereby prolonging the protection service life of the paint.

A method for making epothilones and epothilone analogs is described, as are novel compounds made by the method. One embodiment of the method was used to synthesize epothilone B by a convergent approach that entailed Wittig coupling of an ylide derived from phosphonium bromide with an aldehyde. The former was prepared from propargyl alcohol by a nine-step pathway which installed both trisubstituted double bonds with clean Z configuration. Macrolactonization of a resulting seco acid provided the following intermediate diene epothilone analog. Selective saturation of the 9,10-olefin and subsequent epoxidation provided epothilone B.

The invention relates to the field of material surface working, and provides a tinning processing method for a Bi2Te3 matrix. The tinning processing method comprises the following steps: A, ultrasonic alkali degreasing; B, sulfuric acid neutralization and activation; C, primer nickel electroplating; D, electrotinning; and E, tining layer protection processing. The invention further provides a supplement. The supplement comprises components in percentage by mass as follows: 0.15% plus or minus 0.01% of propargyl alcohol, 0.15% plus or minus 0.01% of dibenzenesulfonimide, 0.12% plus or minus 0.02% of butynediol, 0.35% plus or minus 0.03% of sodium dodecyl sulfate, 0.02% plus or minus 0.01% of saccharin and the balance of deionized water. The tinning processing method is used for surface processing of the Bi2Te3 matrix, tinning processing is performed, and a welded tin surface layer welded with a substrate is formed.

The invention discloses fractional distillation equipment for separating propargyl alcohol and a method of the equipment, which are applied to the field of chemical separation. The fractional distillation equipment comprises a clamping wall tower, a rectifying tower stripping section, a rectifying tower rectifying section, a rectifying tower condenser, a vacuum evaporator, a rectifying tower tail cooler, a return tank, heaters and a vacuum evaporator cooler, wherein the clamping wall tower comprises stripping sections; an alkali liquor feeding hole is formed on the top of the clamping wall tower; the rectifying tower consists of the rectifying tower stripping section and the rectifying tower rectifying section; a mixture feeding hole and a demister are arranged between the rectifying tower stripping section and the rectifying tower rectifying section; the clamping wall tower is coupled to the rectifying tower; the clamping wall tower and the rectifying tower are connected with the heaters respectively; the rectifying tower is connected with the rectifying tower condenser; the rectifying tower condenser is connected with the rectifying tower tail cooler and the return tank; and the return tank is connected with the top of the rectifying tower through a first pipeline and is connected with a propargyl alcohol recovery pipeline. The concentration process is omitted, the concentration and propargyl alcohol concentration extraction are integrated, the process of separating the propargyl alcohol from butynediol is simplified, the production efficiency is improved, the multi-effect energy-saving technologies such as thermal coupling and thermal networking are adopted, and the product quality is improved.

Belonging to the technical field of oilfield chemical products, the invention in particular relates to a novel high-temperature resistant acidification corrosion inhibitor. The corrosion inhibitor is prepared by: reacting acetophenone, trioxymethylene, cyclohexylamine, hydrochloric acid with oleic acid to generate a ketone aldehyde amine condensate, and then compounding the condensate with nonylphenol polyoxyethylene ether, ethanol (methanol), thiourea, propargyl alcohol and potassium iodide. The high-temperature resistant acidification corrosion inhibitor has the advantages of no pollution of three wastes, low cost, easily available raw materials, simple process, convenient use and the like, and can effectively resist high temperature (204DEG C).

The invention discloses a propynylamine high-temperature acidizing corrosion inhibitor and a preparation method thereof. The propynylamine high-temperature acidizing corrosion inhibitor is prepared by the following steps: by taking propargyl alcohol, organic amine and aldehyde as raw materials and a cuprous salt as a catalyst, carrying out mannich reaction within a relatively short time under promotion of ultrasonic waves to synthesize propynylamine compounds; and compounding the propynylamine compounds with potassium iodide and a surfactant. The corrosion inhibitor is a yellow or brown emulsion and is stable and uniform, can be well dispersed in an acidic liquid and can give play to a good corrosion inhibiting effect under the condition of a high temperature from 100-140 DEG C, so that the propynylamine high-temperature acidizing corrosion inhibitor is effectively prevented being corroded in the acidizing process. In addition, the corrosion inhibitor disclosed by the invention is prepared by using an ultrasonic wave synthetic method and has the characteristics of being low in synthetic temperature, short in time, high in reaction yield and the like.

The invention relates to a preparation method of an alpha-beta-unsaturated carbonyl compound, in particular to a method in which the alpha-beta-unsaturated carbonyl compound is prepared from substitute propargyl alcohol in a mode that positive ion modified imvite serves as a catalyst, the substitute propargyl alcohol serves as the raw material, and Meyer-Schuster rearrangement is utilized. According to the method, the substrate is wide in application range, the catalyst is cheap, easy to manufacture, stable, free of pollution to the environment and capable of being recycled, the reaction yield is high, stereoselectivity is good, and an E-type product can be obtained in a singular mode.

The invention provides a preparation method of a corrosion inhibitor of methanol gasoline, and belongs to the technical field of metal corrosion protection. The preparation method comprises steps as follows: alpha-methylstyrene dimer, maleic anhydride, dicumyl peroxide and dimethylbenzene are added into a reactor, and then, the mixture is heated in an atmosphere of nitrogen for reacting; after the mixture is cooled to the room temperature, octadecanol, polyethylene glycol, p-toluenesulfonic acid, n-butyl alcohol and ethyl acetate are added, the mixture is heated for reacting and then cooled to the room temperature, and a mixture I is obtained; the mixture I is washed with a sulfuric acid aqueous solution, then washed with an NaOH aqueous solution and finally washed with an aqueous solution, and a mixture II is obtained; and benzotriazole, 2, 6-tert-butyl-4-methyl phenol, hexamethylene tetramine, ethanol, propargyl alcohol, trimellitate, a surface active agent and a combustion improver are added into the mixture II and uniformly stirred, and the corrosion inhibitor is obtained. The provided methanol gasoline has good solubility with various oils, the additive amount is small, and the corrosion-resistant effect is superior to that of a similar product.

The invention provides a composite acid catalyst for esterification of biodiesel. The composite acid catalyst consists of acid and an inhibitor in mass ratio of 1:(0.01-0.15), wherein the acid is methanesulfonic acid, ethanesulfonic acid or chlorosulfonic acid; the inhibitor is phosphomonoesterase, polyether acid phosphate or propargyl alcohol. The catalyst is applied to the esterification reaction of biodiesel, causes less dosage, has high catalyzing activity, does not produce other byproducts during the reaction, brings low requirement on material of equipment, and can be used for effectively solving the problems in esterification production of biodiesel that the catalyzing efficiency is relatively low, high requirements are brought to the materials of reactors and reaction equipment, and the products are difficult to separate.

The invention relates to the field of oil field chemical engineering, in particular to a corrosion inhibitor suitable for a delivery pipeline in a H2S/CO2-containing corrosive environment of an oil and gas field and a preparation method of the corrosion inhibitor. The corrosion inhibitor is prepared from, by mass percentage, 20% to 30% of propargyl alcohol Mannich base quaternary ammonium salt, 15% to 20% of 8-hydroxyquinoline, 10% to 17% of fatty alcohol-polyoxyethylene ether phosphate sylvite, 5% to 12% of 2-ethylethanolamine, 1% to 2% of an emulsifying agent and 30% to 35% of a solvent. By the adoption of the corrosion inhibitor, corrosion of H2S, CO2 and Cl- systems can be reduced, and the corrosion inhibitor can be used for corrosion resistance in a gathering pipeline and equipment; corrosion of H2S/CO2/CO2-H2S-H2O systems can be inhibited, the metal pipeline and the equipment are effectively protected in the high-salinity sewage environment containing CO2 and H2S; and the corrosion inhibitor has the characteristics of being small in use amount, high in corrosion inhibition efficiency, easy and convenient to prepare, low in cost and the like in the industrial production and application processes.

The invention relates to a propargyl alcohol type quaternary ammonium salt surfactant and a preparation method thereof, and the structural formula of quaternary ammonium salt is as follows: n is equal to 8, 10, 12, 14 or 16, and X is Cl or Br; and a substituent is positioned in the ortho-position, interposition or para-position. The preparation method is as follows: (1) adding 3-5g of NaH into a reactor, introducing nitrogen, adding 60-90ml of THF (tetrahydrofuran), stirring at room temperature, dropping 4-6g of propiolic alcohol, further slowly dropping 10-15g of chloromethylpyridine, stirring for 15-30h, separating water phase from organic phase, washing, drying, performing column chromatography, and then getting pyridyl-2-butynol; and (2) adding the pyridyl-2-butynol and alkyl halide into the reactor according to the molar ratio of 1: 1.5-1: 4, further adding 10ml-15ml of acetonitrile, refluxing and stirring for 20-30h at the temperature of 50-80 DEG C, washing, performing the column chromatography, and then getting the alkynol type quaternary ammonium salt surfactant. The series of the propargyl alcohol type quaternary ammonium salt surfactants have very high surface activity and very strong corrosion inhibition performance, the preparation method is simple and feasible, the operation is easy, the yield is higher, and the environmental pollution can be avoided.

The invention discloses a macromolecule bonding agent applicable to a polytriazole cross-linking curing system as well as a preparation method and application thereof. The macromolecule bonding agentis of a structure as show in the specification. The preparation method comprises the following steps: by taking acetone as a solvent, and azodiisobutyronitrile as an initiator, initializing polymerization of acrylonitrile and acrylic acid propargyl alcohol ester, washing with ethanol, and drying, thereby obtaining a bonding agent sample. The macromolecule bonding agent is applicable to the polytriazole cross-linking curing system, and is capable of improving the mechanical properties of a composite solid propellant.