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US 11,851,400 B2Granted
Intensified process of synthesis of dialkyl ethers using a step conical reactor
AssigneeCouncil of Scientific and Industrial Research
InventorsThirumalaiswamy Raja, Vipul Subhash Patil, Siva Prasad Mekla, Snehal Narayan Teli, Kiran Chandrashekhar Chavhan, Akash Ravindra Bhatkar
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Abstract
The present invention relates to an intensification of the synthetic process for the preparation of dialkyl ether from alcohol by using a conical fixed bed reactor integrated with distillation coupled conical polishing reactor.
Claims12
An intensified process for preparation of dialkyl ether comprising:
- dehydrating an alcohol in a reactor system, wherein the reactor system comprises a step conical fixed bed reactor coupled with a polishing reactive distillation unit, by injecting a liquid alcohol, at a flow rate of 2.65-8.5 ml·min−1 and WHSV of 0.5-1.61 h−1 at a temperature in a range of 200-260° C. under 1-10 bar pressure at the reactor system to obtain dialkyl ether, wherein the process is catalyst independent and wherein the step conical fixed bed reactor is divided into an upper section and a lower section by a perforated screen, wherein the perforated screen is configured for supporting a catalyst and wherein the upper section and the lower section have varying steps diameter adapted to provide a surface area for contact of the catalyst for a fresh incoming feed.
A reactor system for preparation of dialkyl ether, the reactor system comprising:
- a step conical fixed bed reactor divided into an upper section and a lower section by a perforated screen, wherein the perforated screen is configured for supporting a catalyst and wherein the upper section and the lower section have varying steps diameter adapted to provide a surface area for contact of the catalyst with a fresh incoming feed;
- a phase separator connected to the step conical fixed bed reactor through a heat exchanger, wherein the phase separator is configured to remove an output stream of an unreacted reactant and a by-product by keeping a temperature of 120° C. at a bottom of the phase separator using the heat exchanger, wherein the unreacted reactant comprises an alcohol and the by-product comprises water;
- a reactive distillation column adapted to distill the unreacted reactant and the by-product to separate the unreacted reactant as a vapour;
- a reflux inlet adapted to further purify the unreacted reactant by refluxing a fresh alcohol;
- and
- a polishing catalyst zone adapted to react with a vapour phase of the alcohol from the reactive distillation column to form dialkyle ether and water.
3 more elements
Dependencies are inferred from the claim text.