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US 2025/0084017 A1Published application
Ethanol dehydration process
AssigneeScientific Design Company, Inc.
InventorSaurabh KATIYAR
Life of this patent
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Abstract
A process for the dehydration of ethanol to ethylene with reduced steam consumption and the use of latent heat of condensation to generate steam.
Claims20
A process for the dehydration of ethanol to ethylene comprising the steps of:
- (a) forming a reactor feed mixture by blending an ethanol vapor stream with a superheated steam stream;
- (b) supplying the reactor feed mixture to the ethanol dehydration reactor;
- (c) dehydrating the ethanol in the reactor feed mixture in ethanol dehydration reactor to form an ethylene product stream;
- (d) supplying the ethylene product stream to a steam generator at a pressure of about 0.2 to about 0.3 MPa and a temperature of about 125° C. to about 140° C.;
- (e) cooling the ethylene product stream to below a dew point of the ethylene product stream to release the heat of condensation;
- (f) generating a second process steam stream by the heat of condensation, the process steam stream having a temperature of about 95° C. to about 120° C.;
- (g) passing from the steam generator the second process steam stream at a pressure of about 0.125 MPa to about 0.2 MPa;
- and
- (h) compressing the second process steam stream to a pressure of about 0.3 MPa to about 0.45 MPa.
6 more elements
A process for the dehydration of ethanol to ethylene comprising the steps of:
- (a) forming a reactor feed mixture by blending an ethanol vapor stream with a superheated steam stream at a weight ratio of 1:1 to 1:5, the reactor feed mixture having a temperature of about 425 to about 500° C.;
- (b) supplying the reactor feed mixture to the ethanol dehydration reactor, wherein the ethanol dehydration reactor is a single stage adiabatic reactor with a packed bed of γ-alumina dehydration catalyst;
- (c) dehydrating the ethanol in the reactor feed mixture in ethanol dehydration reactor to form an ethylene product stream, the ethylene product stream having a temperature of about 325° C. to about 425° C. upon leaving the reactor;
- (d) supplying the ethylene product stream to a steam generator at a pressure of about 0.2 to about 0.3 MPa and a temperature of about 125° C. to about 140° C.;
- (e) cooling the ethylene product stream to below a dew point of the ethylene product stream to release the heat of condensation;
- (f) generating a second process steam stream by the heat of condensation, the process steam stream having a temperature of about 95° C. to about 120° C.;
- (g) passing from the steam generator the second process steam stream at a pressure of about 0.125 MPa to about 0.20 MPa;
- and
- (h) compressing the second process steam stream to a pressure of about 0.3 MPa to about 0.45 MPa.
6 more elements
Dependencies are inferred from the claim text.