Ether process

The ether process combines an alcohol with an iso-olefin. In the United States, a weight percentage of oxygenate (2 wt.%) content is mandated for reformulated gasoline (RFG). The most common oxygenate currently used is methyl tertiary butyl ether (MTBE). Methanol and the iso-olefin form of isobutylene are reacted to form MTBE. Other alcohols, such as ethanol, may be reacted with iso-butylene to form ethyl tertiary butyl ether (ETBE). Methanol can be reacted with iso-amylene, another iso-olefin, to form tertiary amyl-methyl ether (TAME). Of all the mentioned ethers, MTBE is the one most widely used as a gasoline-blending component.16... 

Since the anisole process was superior to the dimethyl ether process with respect to separation factor, throughput, irreversible decomposition, and ease of product recovery, it was expected to be more economical as... 

In a Liquid Phase Di-Methyl Ether process (LPDME), synthesis gas (syngas) is converted into dimethyl ether (DME) in a single slurry phase reactor over a catalyst system. Both methanol synthesis and methanol dehydration function as a physical mixture of a methanol synthesis catalyst and a dehydration catalyst (dual catalyst system). Three reactions take place simultaneously in the system, namely ... 

Development work in the pilot-plant production of the vinyl ether intermediate was performed on a Mettler Toledo ReactlR MP m. This instrument was the hrst generation of explosion-proof manufacturing technology available from Mettler Toledo. Setup requirements for the incorporation of the ReactlR monitoring system into the vinyl ether process in the pilot plant were minor. Installation of a fiber optics cable and protective conduit from the pilot-plant operations area to the control room, allowing communication between the acquisition computer (contained within the ReactlR MP ) and the monitoring station, was the most extensive mechanical modification. ... 

Kumar P, Carrillo A, Fisher SM, Tople NV. PolyCphenylene ether) process. US Patent 8466 253, assigned to Sabic Innovahve Plashes IP B.V., NL 2013. 

A similar batch ether process was operated on a scale of 1 ton/day by the U.S. Mallinckrodt Works as early as 1942. It was, however, modified in 1946 to a counter-current acid ether process using 40 ft high columns of about four theoretical stages. These columns had centrifugal pumps and jet mixers at 4 ft intervals, and relatively calm zones between. Advantage was taken of the increased uranium distribution coefficient in the presence of excess nitric acid, to reduce the solvent-to-aqueous fiow ratio and achieve a... 

New TBP process. The introduction of a more elegant multi-stage counter-current TBP extraction process at Springfields was delayed because of the successful operation of the ether process. Although ether is a potentially hazardous solvent, precautions were always adequate to prevent com-... 

The preceding epoxidation reaction can be performed in a batch, semibatch, or continuous process. Similar to that of the glyceryl ether process, a batch process is preferred for several reasons. One reason is that if the epoxidation does not achieve the desired conversion, it is a simple matter to add additional alkali metal hydroxide solution and continue the reaction. Sodium or potassium hydroxide is the preferred epoxidation reagent due to economic considerations. 

The basic input/output diagram of the process is shown in the process concept diagram of Figure E2.6(a). Figure E2.6(a) Process Concept Diagram for the Mixed Ethers Process of Exarqile 2.6... 

Figure B.1.1 Unit 200 Dimethyl Ether Process Flow Diagram...

Cheng JK et al (2011) Design and control of the glycerol tertiary butyl ethers process for the utilization of a renewable resource. Ind Eng Chem Res 50(22) 12706-12716... 

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