SU568647A1 - Method of obtaining ethylene oxide - Google Patents

Description

(54) THE METHOD OF OBTAINING ETHYLENE OXYDISE is loaded through the catalyst pipe 3. the catalyst and air heated to 300 ° C circulate it between the devices / and 2. When the regime temperature is reached, the reactor with the upstream flow is fed through pipes 4 3-3 , 2 about. % ethylene mixed with air. At one time, at various points, 1-5 vol. % (preferably 3% by volume) of oxygen, calculated on the volume of the Initial reaction mixture. Thus, the ethylene-air mixture is constantly in contact with the catalyst with high activity | Due to its pretreatment with oxygen, creating favorable conditions for maximum conversion of the raw material along the height of the reactor. The reaction products at the outlet of the reactor are separated from the catalyst in a separator device, the catalyser is poured down into the pressure station, where it is activated by oxygen and again: it enters the reaction, and the contact gas is removed from the system through a nozzle. The proposed method allows the process to increase the productivity of the process by 85-90%, the removal of ethylene oxide is 500 hl of catalyst per hour, the yield of ethylene oxide, considering ethylene missed, is 64.5%. In the case of the measures, the results of the oxidation process are given as for the case when the second stage, i.e., only the immobilizing reactor in the upstream reactor ethylene is fed into the falling flow reactor, as well as for the case when unreacted Ethylene before entering the downstream reactor is supplemented with fresh to the total optimal allowable concentration of it in the mixture with air. In this case, the processing of the catalyst is controlled by the oxygen consumption and the catalyst flow rate. The optimal time for obborkhoki 5-10 s. Example 1. Up-flow catalyst reactor. The reaction mixture containing 3.00 vol. % of ethylene in air with air, in contact with a catalyst previously treated with oxygen. The amount of oxygen supplied to the catalyst bed is 3 vol. % The reaction temperature is 290 ° C. When fed to a reaction of 3 vol. % ethylene and 97.0 vol. % of air receive, about. %:

Ethylene oxide1,415

Carbon dioxide1,20

Ethylene (unreacted) 0.98

The overall conversion of ethylene is 66.8%. The yield of ethylene oxide, calculated on turned pilene 70.2%.

Falling-current reactor.

When submitting to the reaction of 3.0 vol. % ethylene. on (0.98% of non-iro-reaction in the first reactor, plus 2.02 fresh) and 97.0 vol. % of air. get about. %:

Ethylene oxide1,02

Carbon dioxide1,0

Ethylene (unreacted) 1.48 The resulting contact gas coming out of the first reactor, after removing ethylene, carbonic acid, water and, partially, nitrogen from it, with unreacted ethylene content of 0.98% by volume. % return to re-oxidation in the reactor with a falling stream. The reaction temperature is 270 ° C. When fed to the reaction 0.98 vol. % ethylene and 99.02 vol. % of air receive, about. %: Ethylene oxide 0.525 Carbon dioxide 0.44 Ethylene (unreacted) 0.24 Total ethylene conversion 74.0%. The yield of ethylene oxide, calculated on converted ethylene, is 71.0%. As a result of sequential oxidation in two reactors with a mixture of 3% ethylene, obtained, about. %: Ethylene oxide 1.940 Carbon dioxide 1.64 Ethylene (unreacted) 0.24 Total conversion of ethylene and 92.0% ethylene. The yield of ethylene oxide, calculated on converted ethylene, is 70.0%. The yield of ethylene oxide in the calculation of the missed ethyl 1H, 64.5%. Example 2 Upstream catalyst reactor. The oxidation process is carried out in the same conditions as described in Example 1, conditions x. When applying for activation, 3 vol. % oxygen, 3 vol. % ethylene and 97% by volume of air are obtained, about. %: Ethylene oxide 1,415 Dioxide of carbon1.20 Ethylene (unreacted) 0.98 Total conversion of ethylene 66.8%. The output of Oka.SI ethylene in the calculation of the converted ethylene 70,2%. Catalyst falling reactor. The contact gas leaving the reactor with an upstream after removing from it reaction products (ethylene oxide, carbon dioxide and water) with an ethylene content of 0.98 vol. % is supplemented with a fresh portion of ethylene. to a total concentration of 3.0 vol. mixed with air. % The reaction temperature is 270 ° C.