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Methanol conversion process

a technology of methanol and conversion process, which is applied in the direction of liquid hydrocarbon mixture production, liquid carbonaceous fuel, inorganic chemistry, etc., can solve the problems of thermal balance, unfavorable product distribution, and extremely fast catalyst aging rate or even damage to the catalys

Inactive Publication Date: 2015-10-01
AIR FUEL SYNTHESIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a process for converting methanol to hydrocarbons within the C5 to C17 range using a zeolite microporous crystalline material ITQ-39. The process can be operated under typical MTG operating conditions and the catalyst used is ITQ-39, which has a specific composition and structure. The invention also includes a method for synthesizing ITQ-39 and its use as a catalyst or absorbent in various processes. The technical effect of the invention is to provide a more efficient and effective process for the conversion of methanol to hydrocarbons.

Problems solved by technology

In the operation of the fixed bed process, a major problem which has to be dealt with is the thermal balance.
In an adiabatic reactor this would result in a temperature rise which would lead to extremely fast catalyst aging rates or even to damage to the catalyst.
Furthermore, the high temperatures which might occur could cause undesirable products to be produced or the product distribution could be unfavorably changed.
A degree of control over the temperature of the catalyst bed can be achieved by suitable choice of bed configuration but this expedient is generally insufficient by itself and other methods must be employed.

Method used

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Examples

Experimental program
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Effect test

example 1

Preparation of a Dication in the Form of a Dihydroxide

[0060]The organic dication SDA-1 having the structure of Formula 1 is synthesized following a general process represented in the following schema:

[0061]In this general process, a reductive amination reaction is carried out of 1-propyl-4-piperidone (compound B) with pyrrolidine (compound A) giving rise to the corresponding diamine (compound C). The diamine is diquarternised by propyl halide to be transformed into the SDA-1 dication (compound D).

[0062]More specifically, the organic dication is prepared as follows: 30 g of pyrrolidine is dissolved in 200 mL of methanol and this solution is acidified with HCl (5N in methanol) to reach pH=7.5, continuously cooling the mixture in an external bath at 0° C. Then, 37 g of 1-propyl-4-piperidone are added, followed by 10.5 g of NaBH3CN. The resulting mixture is maintained at ambient temperature and stirred continuously for 72 hours.

[0063]To this mixture, HCl is added slowly to reach a pH le...

example 2

Synthesis of ITQ-39

[0066]A. 0.480 g of Al isopropoxide is added over 10 g of tetraethyl orthosilicate (TEOS). Then, 39.83 g of a solution of [SDA-1](OH)2 from Example 1 is added. The mixture is left evaporating while stirring until complete elimination of the ethanol from the hydrolysis of the TEOS plus the quantity of water required in reaching the final composition indicated. Finally, 1.03 g of a solution of hydrofluoric acid (48% HF by weight) is added. The composition of the gel is:

SiO2:0.0245Al2O3:0.26[SDA-1](OH)2:0.51HF:2.47H2O

[0067]wherein SDA-1 is the dication illustrated in FIG. 1.

[0068]The gel is heated statically for 7 days in a steel autoclave with an internal Teflon cover at 150° C. The solid obtained after filtration, washing with distilled water and drying at 100° C. is ITQ-39.

[0069]B. 0.096 g of Al isopropoxide are added over 5 g of tetraethyl orthosilicate (TEOS). Then, 19.04 g of a solution of [SDA-1](OH)2 from Example 1 is added. The mixture is allowed to evaporat...

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Abstract

A process for the conversion of methanol to hydrocarbons within the C5 to C17 range is described which includes contact of a feed having methanol with a zeolite microporous crystalline material having an empirical formula (I) wherein M is selected from H+, an inorganic cation of charge +n, and mixtures thereof, X is at least one chemical element having an oxidation state of +3, Y is at least one second chemical element other than Si having an oxidation state +4, x has a value between 0 and about 0.3, y has a value between 0 and about 0.1, and recovery of hydrocarbons within the C5 to C17 range from the conversion product.

Description

FIELD OF INVENTION[0001]This invention relates to a process for the conversion of methanol to hydrocarbons over a zeolite catalyst.BACKGROUND ART[0002]Processes for converting lower alcohols such as methanol to hydrocarbons are known and have become of great interest in recent times because they offer an attractive way of producing liquid hydrocarbon fuels, especially gasoline, from sources which are not of liquid petroliferous origin. In particular, they provide a way by which methanol can be converted to gasoline boiling range products in good yields. The methanol, in turn, may be readily obtained from coal by gasification to synthesis gas and conversion of the synthesis gas to methanol by well-established industrial processes. As an alternative, the methanol may be obtained from natural gas by other conventional processes.[0003]This process is the well known methanol to gasoline process as developed and operated my ExxonMobil as the ExxonMobil MTG process. This technology is exte...

Claims

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Application Information

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IPC IPC(8): C10G3/00C10L1/06
CPCC10G3/49C10L2270/023C10L1/06B01J29/70C01B39/48C10G3/45C10G50/00C10G2300/70C10G2400/02C10G2400/08Y02P20/52Y02P30/20C07C1/20C07C11/02
Inventor JENNINGS, JAMES ROBERT
Owner AIR FUEL SYNTHESIS