METHOD OF OBTAINING ALKYLACETATE Russian patent published in 2008 - IPC C07C67/04 C07C69/14 

FIELD: chemistry.

SUBSTANCE: complex esters of carboxylic acids found application in paint-vanish and other branches of industry. Method of obtaining alkylacetate from acetic acid and alkene(s) C₃-C₅ or its(their) mixtures with saturated hydrocarbons is realised by contacting at higher temperature with solid strong-acid catalyst in one or several consecutive reaction zones with further separation of reaction mixture and isolation of concentrated alkylacetate by means of rectification, in which by regulation of reagent supply, temperature and cooling of flow(s) in each point of reaction zone(s) and on its (their) output, mole ratio acetic acid: alkene(s) not less than 1.2:1 and temperature not more than 120°C are supported, limitation of temperature is ensured by distributed supply of cold alkene-containing flow with temperature from minus 30 to plus 60°C into intermediate points of reaction zone(s) and/or between reaction zones possibly in combination with method(s) of cooling of reaction flows, selected from group, including: cooling reaction zone(s), cooling flows between reaction zones, cooling and recirculation of part of outgoing reaction mixture flow to input as minimum to first reaction zone.

EFFECT: efficient long-term catalyst functioning and obtaining pure product.

10 cl, 6 ex, 2 dwg