Preparation of ethers (C07C41/01)

ethod for alcoxyphenol and alcoxyhydroxybenzaldehyde production // 2628525
FIELD: chemistry.SUBSTANCE: method for alkoxyphenol production comprises O-alkylation of at least one hydroxyphenol to form at least one alkoxyphenol, at that, the said reaction is carried out using an O-alkylating agent, an aqueous solvent containing a Bronsted base and an organic solvent with a base/O-alkylating agent ration in the range of 0.5 to 1.5 moles of base per mole of O-alkylating agent, with an O-alkylating agent/hydroxyphenol ratio in the range of 0.5 to 2 moles of O-alkylating agent per mole of hydroxyphenol and with an organic solvent/hydroxyphenol ratio of less than 280 ml, preferably in the range of 10 to 250 ml and more preferably in the range of 50 to 150 ml of an organic solvent per mole of hydroxyphenol. One of the versions of the alkoxyhydroxybenzaldehyde production method comprises preparation of alkoxyphenol from hydroxyphenol by the foregoing method and a reaction of the aldehyde group addition to the resulting alkoxyphenol to obtain the corresponding alkoxyhydroxybenzaldehyde, preferably by condensation reaction between alkoxyphenol and glyoxylic acid, followed by oxidation of the resulting compound.EFFECT: proposed method for alkoxyphenol production allows the desired product to be obtained in good yield and high purity with high conversion of initial hydroxyphenol.11 cl, 3 dwg, 7 ex
Catalytically active body for synthesis of simple dimethyl ether from synthesis gas // 2624015
FIELD: chemistry.SUBSTANCE: describes a catalytically active body for synthesis of dimethyl ether from synthesis gas, consisting of: (A) 70-90% by weight of a methanolate component selected from the group consisting of copper oxide, alumina, zinc oxide, amorphous alumina, Ternary oxide or mixtures thereof, (B) 10-30% by weight of an acid component selected from the group consisting of an aluminosilicate, γ-alumina and zeolite or mixtures thereof, the sum of the components (A) and (B) being generally 100% by weight, and wherein component (A) has a particle size distribution characterized by a D-10 of 5-140 mcm, A D-50 value of 40-300 mcm and a D-90 value of 180-800 mcm, wherein the component (B) has a particle size distribution characterized by a D-10 value of 5-140 mcm, a D-50 value, Equal to 40-300 mcm, and a D-90 value of 180-800 mcm, and particle size distribution of the components (A) and (B) is maintained in the catalytically active body. The process of preparing catalytically active body is disclosed, it comprises the step of: a) preparing a physical mixture comprising the above components (A) and (B). Also a process for preparing dimethyl ether from synthesis gas is disclosed; it comprises at least the following steps: f) reducing mentioned catalytically active body, g) contacting catalytically active body in the form of reduced with hydrogen and at least one of carbon monoxide or carbon dioxide. Exemplified catalytically active body is applied to produce dimethyl ether.EFFECT: obtaining a catalytically active body, which features the ability to convert CO synthesis gas selectively to dimethyl ether and CO2, whereby the yield of dimethyl ether increases.12 cl, 2 tbl, 3 ex

ethod of producing bis(2-hydroxyphenyl)ether of oligoethylene glycol in monohydrate form // 2564257
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing bis(2-hydroxy-phenyl) ether of oligoethylene glycol in monohydrate form - an intermediate product for synthesis of symmetrical and asymmetrical dibenzo-crown-ethers, which are used as a selective extractant of cations of different metals, including radioactive metals, as well as in different areas of chemistry, engineering, biology and medicine. The method includes reacting excess pyrocatechol with dichloro-substituted oligoethylene glycol in the presence of an alkaline agent in a medium of an organic solvent while heating. As the alkaline agent sodium hydroxide is used, as the organic solvent dimethylformamide is used, and the process is carried out at 100-105°C in the presence of a catalyst - silicon oxide or a metal oxide (amphoteric or basic), preferably nano-sized.EFFECT: method enables to obtain the end products with significant simplification of the implementation of the process.7 ex

ethod of producing 2,6-di-tert-butyl-4-methoxymethylphenol // 2555709
FIELD: chemistry.SUBSTANCE: method includes reacting 2,6-di-tert-butylphenol with formaldehyde in a medium of methanol in the presence of a catalyst at 40-60°C, followed by separation of the end product. The formaldehyde used is paraform. The process is carried out in molar ratio of 2,6-di-tert-butylphenol to formaldehyde of 1:1.05 and the catalyst used is sodium bicarbonate supported on an ion-exchange resin, which is a crosslinked copolymer of styrene and divinyl benzene, which contains quaternary ammonium groups, with dynamic exchange capacity of not less than 850-900 mg-eq/l.EFFECT: method enables to obtain an end product with high output and quality.2 tbl, 2 ex

ethod of producing dimethyl ether by single-step synthesis and separation thereof // 2528409
FIELD: chemistry.SUBSTANCE: method includes feeding synthesis gas, conducting a reaction in an adiabatic-type reactor at high temperature and pressure in the presence of a bifunctional catalyst, cooling and separating the obtained contact gases into a gaseous and a liquid phase with separation of dimethyl ether from the gaseous phase by absorption with methanol to obtain an absorbent saturated with carbon (IV) oxide and dimethyl ether, and methanol from the liquid phase by fractionation. Synthesis is carried out in a multistep reactor in the presence of a bifunctional catalyst of two types, one of which has higher activity with respect to methanol synthesis - type 1, and the other has a higher activity with respect to methanol dehydration - type 2; before feeding into the reactor, the synthesis gas is mixed with recycling gases, a portion of the obtained mixture is heated to 255-265°C, methanol separated from the liquid phase is injected into said mixture and the mixture is then fed to the first step of the reactor, the other portion is cooled and fed in form of quenching gases to each subsequent reactor step into the main gas stream in an amount which provides gas temperature at entry into the catalyst bed located at said steps of 240-250°C; the entire gaseous phase stream after separation is fed for absorption of dimethyl ether, and the obtained saturated absorbent is fed for screening carbon (IV) oxide to obtain a mixture of dimethyl ether and methanol, which is subjected to fractionation to obtain a distillate - dimethyl ether with impurity content of 3.0-10.0 wt % and a bottom residue - methanol, which is fed for absorption again.EFFECT: method enables to obtain an end product with high output and selectivity using a simple method.6 cl, 1 dwg, 6 tbl, 5 ex

ethod of producing dimethyl ether // 2526622
FIELD: chemistry.SUBSTANCE: method includes catalytic conversion of synthesis gas in a dimethyl ether synthesis reactor to obtain a mixture of products containing dimethyl ether, methanol, carbon dioxide and unreacted synthesis gas, followed by separation thereof and obtaining the end product by condensation from the gaseous phase. The synthesis gas subjected to catalytic conversion is obtained from steam gasification of charcoal which is formed from pyrolysis of pre-dried wood wastes, and after separating the mixture of products, the liquid phase is fed into a fractionation column to separate methanol, after which methanol and carbon dioxide-free unreacted synthesis gas of the gaseous phase is fed into the dimethyl ether synthesis reactor.EFFECT: method increases output of the end product.1 dwg

ethod and apparatus for producing synthetic fuel // 2509070
FIELD: chemistry.SUBSTANCE: invention relates to a method where at the first step, a starting mixture containing water vapour and oxygenates such as methanol and/or dimethyl ether is converted on a catalyst to olefins and said olefin mixture is separated on a separating apparatus into a stream rich in C1-C4 hydrocarbons and a stream rich in C5+ hydrocarbons. The stream rich in C5+ hydrocarbons is separated into a stream rich in C5- and C6- hydrocarbons and a petrol product stream rich in C7+ hydrocarbons, wherein the stream rich in C5- and C6- hydrocarbons is partially esterified with methanol and the obtained ester is added to the petrol product stream. The invention also relates to an apparatus for producing synthetic fuel.EFFECT: low content of olefins in synthetic fuel.14 cl, 1 dwg, 2 ex

1-alkoxy-2,7-dimethylocta-2,7-dienes, having acaricidal activity, and method for production thereof // 2496763
FIELD: chemistry.SUBSTANCE: invention relates to novel compounds of general formula , where R is CH3(CH3)CHCH2CH2-, CH3CH=CHCH2-, , which have acaricidal activity. The invention also relates to a method for production of said compounds, which involves reacting corresponding alcohols with quaternary terpenyl ammonium salts, such as N-(2,7-dimethyl-2,7-octadien-1-yl)allyldiethylammonium bromide, N-(2,7-dimethyl-2,7-octadien-1-yl)allylpiperidinium bromide and N-(2,7-dimethyl-2,7-octadien-1-yl)methyldiethylammonium iodide, in the presence of NaOH.EFFECT: disclosed compounds can be used as acaricidal preparations in veterinary in case of sarcoptic mange and common scab in pets and farm animals.2 cl, 2 tbl, 5 ex
ethod of producing 1,5-bis(2-hydroxyphenoxy)-3-oxapentane monohydrate // 2483055
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing 1,5-bis(2-hydroxyphenoxy)-3-oxapentane monohydrate, which is an intermediate product during synthesis of crown ethers which have complexing and solvating properties and are widely used in different fields of chemistry, engineering, biology and medicine. The method involves reaction of β,β'-dichloroethyl ether with pyrocatechol, the reaction being carried out using an excess amount of pyrocatechol in a medium of glycerol and in the presence of sodium carbonate, as well as in the current of an inert gas, at high temperature and while stirring, followed by separation of the end product. The starting pyrocatechol, which is taken in 6-10% stoichiometric excess, is first treated with sodium carbonate in glycerol medium with intense stirring and at temperature of 60-80°C, after which the formed solution is heated to 145-150°C and β,β'-dichloroethyl ether is added, stirred at the same temperature, cooled and the end product is deposited from the reaction solution using ice water and the filter cake is washed with water to neutral reaction.EFFECT: disclosed method enables to obtain the end product with high output.4 cl, 2 ex

ethod of producing therapeutically useful triphenyl butene derivatives // 2465261
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing therapeutically useful triphenyl butene derivatives of formula (Ia) or (lb) in which a compound of formula (II) is alkylated with an alkylating agent of formula X-(CH2)2-O-(CH2)2-O-Pr or formula X-(CH2)2-O-Pr, respectively, where X is Cl, Br, I, mesyloxy or tosyloxy, and Pr is a protective group, to obtain a compound of formula (III) or formula (IV) from which the protective group Pr is removed to obtain the desired compounds in form of Z-isomers. The present invention also relates to a method of producing a compound of formula (Ib) in form of a Z-isomer, in which the compound of formula (II) is alkylated with an alkylating agent of formula X-CH2-COOR, where X is Cl, Br, I, mesyloxy or tosyloxy, and R is an alkyl, to obtain a compound of formula (V) and ester group V is reduced to obtain the end product.EFFECT: improved method.23 cl, 7 ex

Oil medium used in synthesis reaction in reactor, method of producing dimethyl ether, method of producing mixture of dimethyl ether and methanol // 2456261
FIELD: chemistry.SUBSTANCE: invention relates to an oil medium which is suitable for producing dimethyl ether and/or methanol which is used in a synthesis reaction with a suspended layer as a medium which contains a basic component in form of a branched saturated aliphatic hydrocarbon containing 16-50 carbon atoms, 1-7 tertiary carbon atoms, 0 quaternary carbon atoms and 1-16 carbon atoms in branched chains bonded with tertiary carbon atoms; wherein at least one tertiary carbon atom is bonded with hydrocarbon chains with length of 4 or more carbon atoms, lying in three directions. The invention also relates to a method of producing dimethyl ether and a mixture of dimethyl ether and methanol using said oil medium.EFFECT: use of the present oil medium ensures high efficiency of synthesis.9 cl, 4 ex, 1 tbl, 1 dwg

ethod of producing benzyl butyl ether // 2447054
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing benzyl butyl ether, which is a food flavouring agent. The method involves reaction of toluene with n-butanol and CCl4 in the presence of VO(acac)2, activated Et3N at temperature 175°C for 10 hours with molar ratio [VO(acac)2]:[Et3N]:[toluene]:[CCl4]:[BuOH] = 1:5:100:100:1600.EFFECT: invention enables to obtain the end product with low amount of wastes using a simple and cheap selective method.11 ex, 1 tbl

ethod of producing 1-phenoxy-2,2-dichlorocyclopropane // 2443672
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing 1-phenoxy-2,2-dichlorocyclopropane, which relates to cyclopropane derivatives which exhibit high physiological activity. The method is realised through the reaction: . The reaction takes place in a two-phase aqueous-organic medium in the presence of an interphase catalyst. As a rule, the reaction takes place at 45-50°C.EFFECT: method enables to obtain the desired product with high output.6 cl, 3 ex

ethod of producing methylene-hem-diaryloxycyclopropanes // 2440966
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing methylene-hem-diaryloxycyclopropanes, which are used as corrosion inhibitors, as well as reagents in organic synthesis. The method involves O-alkylation of corresponding substituted phenols with chloromethyl-hem-dichlorocyclopropanes in dimethyl sulphoxide in microwave radiation conditions in the presence of an interphase catalyst Catamin AB and aqueous sodium hydroxide solution for 40 minutes.EFFECT: method enables to obtain desired products with high output and prevents formation of by-products.1 tbl, 4 ex
ethod of producing 2-(adamant-1-yloxy)-ethanol // 2420510
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing 2-(adamant-1-yloxy)ethanol used in synthesis of pharmaceutical preparations and having antiviral activity. The method involves adding 1-bromoadantane to potassium hydroxide solution in ethylene glycol and carrying out the reaction for 3 hours at 196-198°C, and the initial product is extracted by neutralising the reaction mixture with 10% hydrochloric acid solution, extraction with chloroform and removing the solvent in a vacuum.EFFECT: invention enables to obtain the end product using a simple and environmentally safe method.3 ex

ethod of producing 1-alkyl-1-alkoxy-2-arylcylopropanes // 2417215
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing 1-alkyl-1-alkoxy-2-arylcyclopropanes of general formula (1): where Ar = Ph, o-MeC6H4, p-MeC6H4; R=CH3, C2H5, C4H9; R'=CH3, C2H5, which can be used in fine organic synthesis, particularly synthesis of biologically active compounds, having pyrethroid, acaricidal, pesticidal, growth-regulating, fungicidal and antibacterial activity. The method involves reacting arylethylene of general formula Ar-CH=CH2, where Ar=Ph, o-MeC6H4, p-MeC6H4, with an equimolar amount of an ester of general formula RCO2R', where R=CH3, C2H5, C4H9; R'=Me, Et, in the presence of diethylaluminium chloride (Et2AlCl), magnesium (Mg, powder) and a Cp2ZrCl2 catalyst in molar ratio Ar-CH=CH2: RCO2R': Et2AlCl : Mg : Cp2ZrCl2 = 10 : 10 : (20-30) : (10-14) : (0.8-1.2) in an argon atmosphere at temperature 20-22°C and atmospheric pressure for 8-12 hours.EFFECT: method enables to obtain desired products with high regioselectivity.14 ex, 1 tbl

ethod of producing 1-phenoxy-1,2-dihydro[60]fullerene // 2385859
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing 1-phenoxy-1,2-dihydrofullerene of formula (1) which can be used as a complexing agent, sorbent, biologically active compound, as well as in making new materials with given electronic, magnetic and optical properties. The method involves reacting fullerene C60 with phenol in the presence of a hafnocene dichloride catalyst in molar ratio C60: Ph-OH:Cp2HfCl2 equal to 0.01:(5-10):(0.0015-0.0025), in a toluene medium as a solvent at temperature 130-180°C for 5-7 hours.EFFECT: method enables selective production of the end product with output of 63-88%.1 tbl, 1 ex

ethod of producing 1-(2-propenyloxy)- or 1-(phenylmethoxy)-1,2-dihydro[60]fullerene // 2375343
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing 1-(2-propenyloxy)- or 1-(phenylmethoxy)-1,2-dihydro[60]fullerene of general formula (1) , which can be used as complexing agents, sorbents, biologically active compounds, as well as in making new materials with given properties. The method involves reacting fullerene C60 with allyl or benzyl alcohol in the presence of a titanocene dichloride catalyst in molar ratio C60 : R-CH2-OH : Cp2TiCl2 equal to 0.01 : (5-10) : (0.0015-0.0025), in a toluene medium as a solvent at temperature ranging from 70 to 90°C for 3 to 7 hours.EFFECT: method allows for selective production of end products with high output 62-80%.1 tbl, 1 ex

ethod of obtaining adamantylphenyl ethers // 2346927
FIELD: chemistry.SUBSTANCE: invention concerns method of obtaining adamantylphenyl ethers of the general formula: R1=R2=H, R3=CH3 (1); R1=OH, R2=R3=H (2); R1=R3=H, R2=OH (3); R1=R2=H, R3=OH (4); R1=R2=H, R3=NO2 (5); R1=OCH3 R2=H,R3=C2H5 (6), which are semiproducts for bioactive substance synthesis. Method involves interaction of adamantane derivative with phenol derivative. 1,3-dehydroadamantane is used as adamantane derivative, and compounds from the range of n-cresol, pyrocatechin, resorcin, hydroquinone, n-nitrophenol, 4-ethylguaiacol are used as phenol derivative, at component mol ratio of 1:(1.5-2) in diethyl ether medium at its boiling temperature for 20-30 minutes.EFFECT: high output of adamantylphenyl ethers.6 ex

ethod of obtaining flurohalogenethers // 2329247
FIELD: chemistry.SUBSTANCE: invention pertains to the method of obtaining (per)fluorohalogenethers with general formula (I): (R)nC(F)mOCAF-CA'F2 (I), which are used in obtaining fluorinated vinyl ethers, which are a class of essential monomers for obtaining various polymers. In formula (I) A and A' are the same or different, represent Cl or Br or one of A and A' represents hydrogen, and the other a halogen, chosen from CI, Br; R=F or fluorinated, preferably perfluorinated, substitute, chosen from the following groups: linear or branched C1-C20alkyl; C3-C7 cycloalkyl; C6-C10aromatic group, C6-C10arylC1C20alkyl, C1-C20alkylC6-C10aryl, or C6-C20alkyl C5-C10hetertocycle; if R represents fluorinated or perfluorinated alkyl, cycloalkyl, arylalkyl, alkylaryl, then it can optionally contains in a chain, one or more oxygen atoms; if R represents a fluorinated substitute, it can optionally contain one or more H atoms and/or one or more halogen atoms, except F; n is an integer, equal to 1 or 2; m is an integer, equal to 3-n. The method involves reaction of carbonyl compounds with formula (II): (R)pC(F)q(O) (II), where p is an integer, equal to 1 or 2; q is an integer, equal to 0 or 1, under the condition that, if p=2, then q=0; if p=1, then q=1; in the liquid phase with elementary fluorine and olefinic compounds with formula (III): CAF=CA'F (III).EFFECT: invention allows obtaining fluorohalogenethers with improved selectivity.8 cl, 9 ex

ethod for preparing symmetric di-(polyfluoroalkyl) esters // 2312097
FIELD: chemical technology.SUBSTANCE: invention relates to a method for synthesis of symmetric di-(polyfluoroalkyl) esters of the formula: [H(CF2)nCH2]2O (wherein n = 2, 4, 6) from corresponding polyfluorinated alcohols in the presence of N,N-dimethylformamide as a catalyst. Method involves mixing reagents at temperature (-15)-(-10)0C followed by their interaction wherein mixture of polyfluorinated alcohol with catalyst interacts with thionyl chloride in the mole ratio of reagents = 1:(0.005-0.009):(1-1.1), respectively, at step-by-step increase of temperature: firstly at 20-300C for 1-2 h and then at 30-500C for 3-6 h, and evolving sulfur dioxide and hydrogen chloride are blown off with inert gas. Method provides synthesis of symmetric di-(polyfluoroalkyl) esters with high yield for a single step.EFFECT: improved method of synthesis.1 tbl, 3 ex

Dimethyl ether production process // 2277528
FIELD: petrochemical processes.SUBSTANCE: process comprises consecutively performed catalytic conversion of synthesis gas in methanol synthesis reactor(s) and synthesis products in methanol dehydration reactor(s). Resulting liquid phase containing methanol, dimethyl ether, and water is separated in two distillation steps to give dimethyl ether in the first step and methanol-water mixture in the second step. Methanol-water mixture is divided into two streams, one being used as absorbent when washing flushing gas and the other being routed to the second distillation step. Gas phase contains unconverted synthesis gas and dimethyl ether. A part of gas phase is combined with initial synthesis gas and the other part (flushing gas) is washed to remove dimethyl ether. Dimethyl ether-charged absorbent is supplied to first distillation step. Methanol from second distillation step is returned to cycle between methanol synthesis reactor(s) and methanol dehydration reactor(s). Preferably, absorbent is used washing stage in amount 20 to 100% of the weight of liquid phase.EFFECT: increased degree of synthesis gas-into-dimethyl ether conversion, reduced level of dimethyl ether in flushing gas, and simplified process flowsheet.1 dwg, 3 tbl, 3 ex

The way decarboxylation derivatives of perfluorinated carboxylic acids // 2188187
The invention relates to a method of decarboxylation of golodnikov or esters of perfluorinated carboxylic acids in order to obtain the corresponding perfluoroolefins or perfluoroalkyl vinyl ethers, which are used as feedstock for the synthesis of polymeric materials with improved performance characteristics

A method of obtaining a product containing dimethyl ether to 20% by weight of methanol and 20% by weight of water // 2144912
The invention relates to the production technology is suitable as fuel-based product dimethyl ether, more particularly to a method for producing a product containing dimethyl ether to 20% by weight of methanol and 20% by weight of water, which can be used as fuel in internal combustion engines with compression ignition

ethod of quantitative analysis of the crude vermeil-1,1,1, 3,3,3-hexafluoroisopropyl ester and method for producing vermeil-1,1,1,3,3,3-hexafluoroisopropyl ether // 2132055
The invention relates to gas chromatography analysis of the impurities contained in vermeil-1,1,1,3,3,3-hexafluoroisopropyl ether (hereinafter referred to as "sevoflurane"), used as pharmaceuticals, agrochemicals or intermediate substances to obtain these tools, as well as concerns control over the content of impurities in the production process "sevoflurane" and based on the method of process control

The way to obtain bis-formativos ether and the method of receiving deformity // 2102376
The invention relates to a chemical process, in particular to a method for producing bis-formativos ester by the interaction of formaldehyde and hydrogen fluoride, and to a method for deformity, comprising a step for bis-formativos ether of formaldehyde and hydrogen fluoride
 
2551187.
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