157 results about "Imidazoline derivatives" patented technology

A skin disinfectant in ready-to-use concentrated liquid or dry powdered form. Ready-to-use liquid forms have a pH of from about 2 to about 6 and include: (a) hydrogen peroxide in a concentration of from about 0.01 to about 4% w/w of the solution; (b) at least one surfactant chosen from imidazoline derivatives, alkyl betaines, alkyl amidopropyl betaine amides, alkyl amidopropyl betaines, alkylsulfo betaines, amine oxides and derivatives thereof in a concentration of from about 0.01 to about 15% w/w of the solution; (c) at least one hydrogen peroxide stabilizer in a concentration of from about 0.01 to about 4% w/w of the solution; (d) at least one member chosen from cyclic carboxylic acids and salts thereof in a concentration of from about 0.01 to about 4% w/w of the solution; and (e) at least one skin conditioning agent in a concentration of from about 0.01 to about 10% w/w of the solution.

The invention discloses a water soluble corrosion inhibitor, the preparation method and the application of the corrosion inhibitor, solving the defect of narrow application range of the corrosion inhibitor pH in the prior art; the water soluble corrosion inhibitor is composed of 20-70 weight proportion of imidazolines derivates, 1-10 weight proportion of pyridine derivates, 1-20 weight proportion of corrosion inhibition auxiliary agent and 10-50 weight proportion of solvent, based on the total weight of the corrosion inhibitor as the reference. The water soluble corrosion inhibitor in the invention has corrosion inhibition effect on the metal material in the medium with wide PH variation range (pH equals to 1-10) and good metal surface film formation property.

The invention discloses a corrosion inhibitor, comprising the following ingredients: modified imidazoline derivative, 1,4-butynediol, thiourea, sodium dodecyl benzene sulfonate, urotropine and solvent, wherein, the weight ratio of modified imidazoline derivative to 1,4-butynediol to thiourea to sodium dodecyl benzene sulfonate to urotropine is (20-50):(1-2):(1-12):(1-5):(2-4), and the quality of the solvent accounts for 30-70% of the total mass of the corrosion inhibitor. The invention also discloses a preparation method of the corrosion inhibitor, comprising the following steps: adding the modified imidazoline derivative, 1,4-butynediol, thiourea, sodium dodecyl benzene sulfonate, urotropine in the solvent, stirring uniformly to obtain the corrosion inhibitor. The corrosion inhibitor disclosed in the invention has good corrosion inhibition effect for CO2 corrosion in the near neutral oil field water system (PH value: 5-6.8).

This invention relates to a method for preparing corrosion inhibitor for corrosion protection of metal pipelines and apparatuses in highly acidic gas fields. The corrosion inhibitor is composed of sulfur-containing imidazoline derivative 25-50%, additive 5-10, surfactant 5-10, and solvent oil 30-55. The corrosion inhibitor has high film-forming ability, and the formed film has durability as long as 240 h. The corrosion inhibitor can be applied on the surfaces of A3 carbon steel, 20# pipeline steel, L245 pipeline steel and L360 pipeline steel by batch treatment or intermittent filling. The corrosion inhibitive rate is greater than or equal to 90%. Besides, the corrosion inhibitor also has good corrosion inhibitive effects on the surfaces of metal tubes and casings in downhole in VM80SS, VM110SS and NT80SS oil and gas wells. The corrosion inhibitive rate is greater than or equal to 90%.

The invention discloses a corrosion inhibitor for oil wells and a preparation method. The corrosion inhibitor includes the following components by weight: 20-40% of an imidazoline derivative, 25-35% of alkyl phosphate, 0.2-1% of thiourea, and the balance water. Specifically, the imidazoline derivative is prepared by subjecting imidazoline to water-soluble modification, and the alkyl phosphate has a molecular formula shown in the description, wherein n=4-20, and M=7-19. The method comprises: mixing and stirring the components uniformly according to the amounts so as to prepare the corrosion inhibitor for oil wells. The corrosion inhibitor provided in the invention can make corrosion inhibitor molecules arranged on a metal surface compactly, so that contact of the metal and a corrosive substance is greatly reduced, thus effectively inhibiting corrosion.

The invention relates to a preparation method of oil soluble hydrogenation corrosion inhibitor for a hydrogenation and reforming device; the oil soluble hydrogenation corrosion inhibitor is prepared by the following ingredients by weight percentage: 5-20 percent of organic amine, 0-20 percent of imidazoline derivative, 10-60 percent of fatty acid amino amide and 30-60 percent of heavy aromatics; the organic amine is gamma-methoxypropylamine, dodecyl primary amine, dodecyldimethyltertiaryamine or diethylenetriamine, preference for gamma-methoxypropylamine or dodecyldimethyltertiaryamine; the oil soluble hydrogenation corrosion inhibitor is formed by mixing all ingredients, the preparation is simple, the performance of a product is stable, and has high efficiency and no toxicity, little corrosion inhibitor is only filled to effectively inhibit corrosion and salt crust generation, the filling process is simple without changing the equipment pipelines; the filling of the corrosion inhibitor has no adverse effect on performance of oil products and the follow-up processing, and the corrosion inhibitor has no interference to the activity of catalyzers and has strong application to the environment.

The present invention relates to an imidazoline derivative. The imidazoline derivative is characterized in that the molecular formula is [R-CN2CH2CH2]-(CH2)2-NHCSNH2, wherein, R is C7 to C16 alkyl. The preparation method comprises two steps: firstly, diethylene triamine and 8 to 17 alkyl organic acid are used for synthesizing an intermediate product alkyl imidazoline under the condition with dimethylbenzene; secondly, thiourea is directly added into the intermediate product alkyl imidazoline, and the imidazoline derivative can be synthesized under the identical condition with the dimethylbenzene. The imidazoline derivative can be used as gas-liquid phase corrosion inhibitor which can inhibit corrosion of carbon and steel in the brine with carbon dioxide. The inhibitor is not only suitable for the brine with carbon dioxide of high salinity, but also suitable for the gas phase with carbon dioxide. And the present invention has the advantages that the amount for application is low, the inhibition efficiency is high, the operation for preparation is simple, and the utilization is convenient.

The invention discloses a corrosion and scale inhibitor composition and an application thereof. The composition includes at least one quinoline derivative, at least one imidazoline derivative and at least one acrylic derivative. The quinoline derivative is selected from quinoline containing an ethylene oxide substituent group. The imidazoline derivative is selected from imidazoline quaternary ammonium salt and bisimidazoline. The invention also discloses an oil field water injection wellbore corrosion and scale prevention method which includes a step of feeding the corrosion and scale inhibitor composition into an oil field water injection wellbore. The corrosion and scale inhibitor composition has excellent corrosion and scale inhibition effect on metal members working under a high-temperature and high-pressure environment (such as the oil field water injection wellbore), and in addition, the corrosion and scale inhibitor composition is free of phosphoric compounds and is free of environment pollution, is environment-friendly, is simple in composition and reduces difficulty of on-site operation.

The invention relates to a multifunctional water treatment agent for oilfield reinjection water. The water treatment agent comprises the following components in percentage by weight: 13 to 27 percent of scale inhibition component consisting of 8 to 15 percent of polymaleic anhydride and 5 to 12 percent of sodium gluconate, 21 to 41 percent of corrosion inhibition component consisting of 15 to 25 percent of imidazoline derivative A, 3 to 8 percent of organic amine salt and 3 to 8 percent of polyethylene oxide octadecylamine, 18 to 40 percent of sterilization component consisting of 10 to 25 percent of alkyl quaternary ammonium salt and 8 to 15 percent of imidazoline derivative B, and the balance of deionized water. The water treatment agent is suitable for treating the oilfield reinjectionwater in an oxygen-free system, and also has a good effect on reinjection water containing CO2 and H2S; and the reinjection water is not required to be pretreated, and only the prepared multifunctional water treatment agent is needed to be added into a pipe network of a reinjection water system according to required concentration.

Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine of the formula:

wherein R is selected from the group consisting of a C₁ to C₁₀ saturated or unsaturated hydrocarbyl group or a C₁ to C₁₀ ω-hydroxy saturated or unsaturated hydrocarbyl group. The dithiazine may be isolated from a whole spent fluid formed by reaction of hydrogen sulfide and a triazine. Alternately, the whole spent fluid containing the dithiazine may be introduced into the well. In addition, the dithiazine or whole spent fluid may be formulated with at least one component selected from alkyl, alkylaryl or arylamine quaternary salts; mono or polycyclic aromatic amine salts; imidazoline derivative or a quaternary salt thereof; a mono-, di- or trialkyl or alkylaryl phosphate ester; or a monomeric or oligomeric fatty acid.

The invention belongs to the technical field of steam turbine lubrication, and is a low-sludge steam turbine lubricating oil composition. 0.03% to 0.2% antirust agent compounded with derivatives, 0.001% to 0.1% antifoaming agent, 1% to 20% polyether, and base oil as the balance. The advantages of the present invention: excellent high temperature resistance and oxidation resistance, in the Dry-TOST test at 120°C, the oxidation life of the remaining rotary oxygen bomb rate of 25% is at least 500 hours, the rotary oxygen bomb is more than 900 minutes, and the TOST oxidation life is more than 10000 Hours; very little sludge formation tendency, in the Dry-TOST test at 120°C, the sludge formation is less than 60mg/kg when the remaining rotary oxygen bomb rate is 25%, and the sludge formation is less than 200mg after TOST test 1000h; the composition can be very good Meet the lubrication requirements of steam turbines and gas turbines with low oil sludge requirements.

The present invention discloses a corrosion and scale inhibitor used for acidic high temperature gas field water and a preparation method and application thereof, and belongs to the technical field of water treatment. The corrosion and scale inhibitor includes the following components by weight: 10%-35% of a 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) water solution; 5%-20% of a 1-hydroxyethylidene-1,1-diphosphonic acid aqueous solution; 5%-20% of a polyamino polyether methylene phosphonate aqueous solution; 10%-25% of a phosphino / acrylic acid / sulfonate copolymer water solution; 5%-10% of an imidazoline derivative water-soluble corrosion inhibitor aqueous solution; 1%-3% of thiourea and balance of water. The corrosion and scale inhibitor can effectively prevent equipment and pipeline corrosion and fouling of 60-90 DEG C acidic high temperature gas field water with pH of 6-8, corrosion inhibiting rate can reach more than 70%, and calcium carbonate scale and calcium sulfate scale inhibition rate can reach more than 90%.

The present invention discloses an adipic acid bis-imidazoline derivative and a preparation method thereof, and applications of the adipic acid bis-imidazoline derivative as a corrosion inhibitor. According to the present invention, the preparation method comprises that: adipic acid and triethylenetetramine react to generate an imidazoline intermediate, the imidazoline intermediate and benzyl chloride react to obtain a quaternization product, and the quaternization product and thiourea react to generate a target compound. According to the present invention, when the adipic acid bis-imidazoline derivative prepared by the method is adopted as the corrosion inhibitor, the excellent anti-CO2 corrosion performance is provided at the low temperature.

The invention relates to the technical field of corrosion inhibitors and discloses a corrosion inhibitor, cleaning solution and application thereof. The corrosion inhibitor comprises the following components in percentage by weight: 37-60% of modified imidazoline derivative, 20-30% of organic alcohol, 10-20% of organic amine, 5-10% of alkynol and derivative thereof and 1-3% of nonionic surface active agent. The corrosion inhibitor is added into the cleaning solution so as to clean stainless steel. The cleaning solution is mixed acid solution of 12% of hydrochloric acid and 5% of fluorhydric acid; and each liter of acid solution is added with 3g of corrosion inhibitor. The corrosion inhibitor has the advantages of being good in cleaning effect, low in corrosion, low in production cost, simple in structure and free of environment pollution and can be used as an acid cleaning corrosion inhibitor for stainless steel precision parts.

The invention relates to water soluble neutralization corrosion inhibitor mainly used for corrosion prevention of metal in a low-temperature light oil part of an oil refinery, and a preparation method thereof. The water soluble neutralization corrosion inhibitor is imidazoline type derivative corrosion inhibitor prepared by using oleic acid, polyene polyamine and quaternization reagent as raw materials, and is prepared by compounding assistant corrosion inhibitor, neutralizing agent and solvent; compared with similar corrosion inhibitor, the additive dosage is low (5-10 ppm); and the corrosion inhibitor has good water solubility, high corrosion inhibition efficiency and good chemical stability and heat stability, and has dual effects of film corrosion inhibitor and neutralization to enable the scene operation to become simple.

The invention relates to an imidazoline derivative with the structure general formula (I), wherein R represents an organic acid alkyl chain with the general formula of -CnHm, n is an integer larger than or equal to 12, and m is equal to 2n-1; R' represents an amido with the general formula of -(CH2CH2NH)n-1H, and n is an integer larger than or equal to 2. The invention also relates to a preparation method of the imidazoline derivative with the structure general formula (I), compounds with the general formulas (II) and (III) which are respectively prepared by adopting the imidazoline derivative as a raw material and modified carboxylic acid or ethylene oxide and a petroleum refining auxiliary agent. The invention has favorable atomization effect and corrosion resistance, and the crude oil can be fully emulsified in petroleum refinement to improve the atomization effect of a nozzle, inhibit colloid generation and reduce the generation of deposited carbon on catalyst, thereby being beneficial to reducing the dry gas and improving total liquid yield, reducing the performance requirement on equipment and prolonging the service life of the equipment.

A phosphorus-free scale and corrosion inhibitor for circulating cooling water treatment. The phosphorus-free scale inhibition and corrosion inhibitor comprises a scale inhibition component, corrosion inhibition component and deionized water. The scale inhibition component accounts for 16-40% of a total amount of the phosphorus-free scale and corrosion inhibitor, and the corrosion inhibition component accounts for 18-48% of the total amount of the phosphorus-free scale and corrosion inhibitor, and the remaining is the deionized water. The scale inhibition component consists of polyacrylic acidaccounting for 5-15% of the total amount of the phosphorus-free scale and corrosion inhibitor, polyaspartic acid accounting for 8-20% of the total amount of the phosphorus-free scale and corrosion inhibitor and sodium gluconate accounting for 3-5% of the total amount of the phosphorus-free scale and corrosion inhibitor. The corrosion inhibition component consists of tannic acid accounting for 5-20% of the total amount of the phosphorus-free scale and corrosion inhibitor, borax accounting for 5-20% of the total amount of the phosphorus-free scale and corrosion inhibitor, and imidazoline derivative accounting for 10-20% of the total amount of the phosphorus-free scale and corrosion inhibitor, wherein the imidazoline derivative is an alkyl imidazoline including one or two of heptadecyl imidazoline and octadecylselyl imidazoline. The phosphorus-free scale and corrosion inhibitor of the invention has advantages of simple preparation, convenient usage, small application amount and low coasts, and is conducive to reduction of circulating water operating costs and reinforcement of circulating water management.

The invention relates to a steam turbine lubricating oil composition which comprises the following components: 0.03-1.5 wt% of an anti-oxidant; 0.03-0.2 wt% of an antirust agent, 0.001-0.1 wt% of an anti-foaming agent, 0.03-1 wt% of an antiwear agent, 1-20 wt% of polyol ester, and balance base oil, wherein the anti-oxidant is alkyl diphenylamine and/or alkyl phenyl-alpha-naphthylamine; the antirust agent is a complex mixture of carboxylic acid derivatives and imidazoline derivatives; the anti-foaming agent is polymethacrylate or methyl siloxane; the antiwear agent is a compound containing sulfur, phosphor, and nitrogen; the polyol ester is pentaerythritol ester or diol ester; and the base oil is II type or III type base oil with the saturated hydrocarbon content more than 90% and the sulfur content less than 0.03%. The steam turbine lubricating oil composition has the advantages of the excellent high temperature resistance and antioxidation performances, tiny greasy filth generation trend, excellent extreme pressure performance, antirust performance, hydrodissection performance, air separation performance, filterability and extreme low acid value.

The invention discloses an imidazoline group-containing benzotriazole derivative, and a synthesis process and application thereof. The synthesis process comprises the following steps: taking benzotriazole as a raw material, and reacting with sodium monochloroacetate/ethyl chloroacetate/ethyl bromoacetate (wherein the reacting yield of the sodium monochloroacetate is highest) to form benzotriazole acetic acid, and performing dehydration and cyclization reaction with diethylenetriamine/triethylenetetramine/tetraethylenepentamine to generate the benzotriazole imidazoline derivative. The reaction conditions are easy to control; and the yield is high. The benzotriazole imidazoline derivative has a good corrosion inhibiting effect on YG8 hard alloy and Q235 low-carbon steel in an acidic water environment.