CS261653B1 - Process for producing 2,2-dialkoxypropane - Google Patents

Abstract

The method for producing 2,2-dialkoxypropane is carried out according to Czechoslovak Patent No. 260 295, wherein the donor of aliphatic alcohols C, to C5 is an additive (mainly a mixture of aliphatic alcohols C2 to C,-,) or at least one by-product from a petrochemical process, consisting of 60 to 93% by weight of at least two aliphatic alcohols, such as from an oxo process, consisting mainly of a mixture of n-butanol with isobutanol and an alcoholic by-product from the oxidation of cyclohexane, consisting mainly of a mixture of alcohols C,1 to C5. The first stage of production is carried out in the presence of radical reaction inhibitors and the second in the presence of a water remover. The process is important for the comprehensive evaluation of by-products from biochemical and petrochemical processes.

Description

eiSKOSLOVENSKA SOCIALISTICKÁ

REPUBLIC (18)

© RAD FOR WNALEZYA DISCOVERY DESCRIPTION FOLLOWING AUTHORITY OSVED & MU 261652 (11) (B3) (51) Int. Cl.4 (61) Author's certificate is subject to copyright No. 260 295 C 07 C 41/06 (22) Registered 08 09 86 (21) (PV 6472-86.V) (40) Published 17 12 87 (45 ) Published 15 05 89 (75)

The inventor of MACHO VENDELÍN prof. DrSc., member of SAS correspondent

PARTIZÁNSKE, BALÁK JIŘÍ Ing., CSc., SVOBODA JOSEF Ing., CSc., PRIEVIDZA (54 j Production of 2,2-dialkoxypropane)

The process for the production of 2,2-dialkoxypropane occurs according to MS. No. 260,295, increasing the donor of aliphatic alkoboles to C5 to C5 is an increment (predominantly of aliphatic alcohols C2 to C-J or at least one by-product of the petrochemical process consisting of 60 to 93% by weight) of at least two aliphatic alcohols, such as oxoprocess, consisting mainly of a mixture of n-butanol and isobutanol and an alcoholic by-product of the cyclohexane oxidation process, consisting mainly of alcohols CL to C5. in the presence of radical inhibitors, and secondly in the presence of a water scavenger, the process is of importance for the complex recovery of by-products from biochemical apetrochemical processors.

Claims (4)

The present invention relates to the preparation of 2,2-dialkoxypropane in which the alkoxy groups are the number of carbons 1 to 5, utilizing technically advanced chemical products, especially petrochemical and chemical chemistry. Dialkoxypropanes are increasingly useful mainly as intermediates in organic synthesis, including industrial organic synthesis. Thus, dialkoxypropanes with low-porous aluminum oxide give isopropenylalkylethers [ru-mun pat. 79 846; Banciu M., Popescu A.:Bull. Inst. Politech. "Cheorghe Cheorghiu — Dej", Bucuresti, sar. chim. - motal. 42, No.1, 101 (1980)] and hexamethylbenzene on high-porosity at 275-500 ° C. Rapid reactions give the compounds of general formula Me: SiMa (CO) 5 as co-compounds of carbon monoxide [Gladyaz J.A., Marši M.:Organometallic 1, 1467 (1982); Tetrahedron Lett, 23, 631 (1982)] and p. However, dialkyl ketals are prepared by rooting ketones with alcohols in the presence of acidic condensation catalysts. 2 827 494) and co-activities of 2.5-5 moles of anhydrous copper sulphate per mole of ton. Thus, in the case of the preparation of 2,2-diinethoxy-propane, e.g. from 11.5 moles of acetone and 23 moles of methanol with a catalytic effect of one mole of hydrochloric acid) and 30 moles of anhydrous calcium sulphate, the main product is obtained in 87% yield (patent application NSR 2) 636,278). Significant advancement is represented by the production of 2,2-dialkoxypropane of formula OR 1 / (CH 3 CO 2 OR 2 in which R 1 and R 3 - alkyl C 1 to C 3 'wherein R 1 and R 2 may be the same or different base of certificate 260 295, wherein the hydrocarbon-containing mixture of alene and / or methyl-acetylene in an amount of from 2 to 98% by weight is reacted with at least one aliphatic alcohol C 1 to C 5 or at least one aliphatic alcohol C 1 to C 5 with the amino group 0, From 1 to 25% by weight of water under the catalytic effect of at least one of the compounds Ia and / or II.b of the subgroup of the periodic system of elements at a temperature of 100 to 250 degrees Celsius, with a molar ratio of alcohol to the total content of alene and / or methylacetylene of 1: 6 up to 6: 1 and a pressure of 0.1 to 1 MPa, the reaction product itself or the separation of hydrocarbons, including unconverted alene and / or methylacetylene, comprising mainly acetone, unconverted alcohol or alcohols, 2-alkoxypropene and The 2-alkoxypropenes are fed to condensation at a temperature of -50 to 35 ° C with the co-formation of an acid catalyst or a combination of acidic with a basic catalyst. However, it does not exhaust all the technically available and significant sources of alcohol-donor or donor donors. alcoholic raw materials. Thus, the production of 2,2-dialkoxypropene of the general formula OR 1 / (CH 2) 2 C OR'3 in which R 1 and R 2 are (c) to wherein R 1 and R 3 are identical or different may be carried out. -takes the podium of MS. by the reaction of a hydrocarbon mixture stretching from 2 to 98 wt. alene and / or methyl acetylene with C 1 to C 5 alcohols, the source of alcohols being the contents of the predominantly aliphatic alcohols C2 to C5a or at least one by-product of the perchloric process consisting of 60 to 98% of at least two alcohols Cj to C5. An advantage of the process of this invention are the higher yields of the main component, namely 2,2-dialkoxyropanes, an extended range of donor predominantly alcoholic substances for the production of 2,2-dialkoxypropanes, using low-valued chemical, petrochemical, biochemical manufacturing products. Last but not least, with the "alcoholic" raw material, the water that is usually present is the most valuable one, which has to be removed in an energy-intensive way. A suitable mixture of at least two alcohols to C- containing from 0.1 to 25% by weight the admixture of water and possibly also the combustible organic compounds is an additive of fermentation ethanol production, containing alcohols C2 to C, even higher alcohols such as C5 and water. Thereafter, from the butanol, isobutanol and 2-ethylhexanol by means of a process of propene, synthesis gas (including carbon monoxide with hydrogen fluoride) and hydrogen, as well as from other petrochemical processes. they mainly distill off organic stripes, the so-called "strip-ol", mainly consisting of n-butanol, isobutanol, n-butyraldehyde, isobutyraldehyde, toluene and water and possibly admixture of triisobutyl amine Other components are already in practically negligible amounts, typically in the range of 6 to 23% by weight of isobutyraldehyde, 0.3 to 2% by weight, n-butyraldehyde of 0.5 to 0.5% by weight of the strip-oil. 6 wt%, isobutanol 20 to 40 wt%,