(C07C47/048)

ethod of obtaining carbonyl compounds c2-c4 // 2570818
FIELD: chemistry.SUBSTANCE: invention relates to method of obtaining carbonyl compounds, namely ketones and aldehydes C2-C4, which find different application as valuable semi-products of FINE and basic organic synthesis, as well as are widely applied as solvents. Method is carried out in gas phase by interaction of nitrous oxide with mixture of aliphatic C2-C4 olefins and alkanes at temperature 300-550C and pressure 1-100 atm.EFFECT: method makes it possible to obtain valuable target products with high productivity and high total selectivity with explosion safety of work.12 cl, 4 tbl, 30 ex
ethod for direct conversion of lower c1-c4 paraffins to oxygenates // 2485088
FIELD: chemistry.SUBSTANCE: invention relates to a method for direct conversion of lower C1-C4 paraffins to oxygenates such as alcohols and aldehydes, which are valuable intermediate products of organic synthesis and can be used as components of engine fuel and/or starting material for producing synthetic gasoline and other engine fuels. The method involves passing a mixture consisting of a lower paraffin or oxygen, diluted with an inert gas or air or pure oxygen, through a catalyst bed at temperature not higher than 350C. The catalyst used is a catalyst system for heterogeneous reactions, which contains microfibre of a high-silica support and at least one active element, the active element being in form of either a MeOxHalv composite or a EwMezOxHaly composite, wherein the element Me in both composites is selected from a group which includes transition metals of groups 5-12 and periods 4 and 5, or elements of lanthanum or lanthanide groups or, preferably, ruthenium; element Hal is one of the halogens: fluorine, chlorine, bromine, iodine, but preferably chlorine; element E in the EwMezOxHaly composite is selected from a group which includes alkali, alkali-earth elements, or hydrogen, and indices w, z, x and y are weight fractions of elements in given composites and can vary in the following ranges: z - from 0.12 to 0.80, x - from 0.013 to 0.34, y - from 0.14 to 0.74, w - from 0 to 0.50.EFFECT: method enables to achieve high degree of conversion of starting reactants and high selectivity of formation of alcohols.4 cl, 15 ex

ethod and apparatus for producing methanol with hydrogen recirculation // 2423341
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing methanol, involving feeding a first stream of hot hydrocarbon-containing gas into a reactor, feeding an oxygen-containing gas into the reactor, oxidation of the hot stream of hydrocarbon-containing gas in the reactor with oxygen from the oxygen-containing gas to form a stream of products containing methanol and formaldehyde; and transferring heat from the stream of products to the first stream of hydrocarbon-containing gas, extracting methanol from the stream of products and extracting CO2 and formaldehyde from the stream of products to form a reduced stream of products containing hydrocarbons through physical absorption thereof with an absorbent, wherein the first stream contains at least a portion of the reduced stream of products, as well as apparatus (versions) for realising said method.EFFECT: invention enables to obtain an end product using an efficient and cheap method.32 cl, 5 dwg

ethod for production of methanol solution of formaldehyde, c2-c4-alcohols and synthetic diesel fuel and device // 2318795
FIELD: organic chemistry, fuel production.SUBSTANCE: claimed method includes feeding of heated hydrocarbon-containing and oxygen-containing gas in reaction unit, vapor phase oxidation of hydrocarbon-containing gas at 250-450°C and pressure of 2.0-10 MPa under near isothermal conditions; cooling of reaction mixture in heat exchangers, separation of gas and liquid phases of reaction mixture. separation of obtained methanol solution of formaldehyde, C2-C4-alcohols and methanol, methanol and gas phase after separation into reactors; catalytic methanol conversion on zeolite catalyst at 350-450°C and pressure of 3-8 MPa; cooling of produced reaction mixture in heat exchangers; separation of gas and liquid phases of reaction mixture; separation of aqueous fraction and synthetic diesel fuel liquid fractions, including fraction of liquid hydrocarbons, corresponding to motor gasoline having octane number of at least 92.EFFECT: products of high quality; simplified technology; decreased energy consumption.5 cl, 1 tbl

ethod for formaldehyde production // 2283829
FIELD: organic chemistry, in particular formaldehyde production.SUBSTANCE: claimed method includes oxidation of hydrocarbon-containing gas with oxygen-containing gas at elevated temperature and pressure followed by reaction mixture cooling and separation of target liquid product. As hydrocarbon-containing gas ethane-containing gas is used, including natural and associated gases containing not less than 10 % of ethane. Ethane-containing gas preliminary pressed up to 2-5 MPa and heated up to 280-450°C, and oxygen-containing gas, preliminary pressed up to pressure of ethane-containing gas or more are separately fed into blenders of arranged in tandem reaction zones up to oxygen content of 2-10 vol.%. Reaction mixture is continuously cooled through wall either directly in oxidation process or before feeding thereof in next reaction zone to temperature not more than 450°C. As oxygen-containing gas air, oxygen or oxygen-enriched air are used.EFFECT: increased formaldehyde yield, simplified process, decreased energy consumption.2 cl, 4 ex, 1 tbl, 1 dwg
Catalyst for the preparation of formaldehyde // 2089286
The invention relates to the petrochemical industry, in particular to catalysts for the preparation of formaldehyde by the oxidation of natural and associated petroleum gas
The method of producing formaldehyde // 2081104
The invention relates to the oil and gas industry, in particular to the field of utilization of associated petroleum gas, namely the technology of obtaining of formaldehyde in aqueous formalin solution

The method of producing formaldehyde // 2051894
The invention relates to organic chemistry, in particular to methods for formaldehyde, and can be used in the chemical industry
 
2551192.
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