Process and plant for the recovery and utilization of higher olefins in the olefin synthesis from oxygenates

一种化合物、芳香族化合物的技术，应用在从含氧有机化合物制烃、含羟基化合物脱水制备醚、化学仪器和方法等方向，能够解决丙烯得率降低、消耗等问题

Active Publication Date: 2019-03-19
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of direct recycling of MTP gasoline into the MTP reactor due to the unwanted alkylation of aromatics occurring inside the MTP reactor, which consumes methanol such that methanol is no longer available for the selective formation of propylene , the yield of propylene in the whole process will even decrease

Method used

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  • Process and plant for the recovery and utilization of higher olefins in the olefin synthesis from oxygenates
  • Process and plant for the recovery and utilization of higher olefins in the olefin synthesis from oxygenates

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Embodiment Construction

[0043] Thermal separation processes in the sense of the present invention include all separation processes based on the attainment of a thermodynamic phase equilibrium. Distillation or rectification is preferred. In principle, however, it is also conceivable to use other thermal separation processes, such as extraction or extractive distillation.

[0044] Fluid communication between two regions or sections of equipment is understood to be any kind of communication enabling a fluid such as a reaction product or a hydrocarbon fraction to flow from one of the two regions to the other, whether or not there are any intervening regions, Components or necessary means of delivery.

[0045] In principle, oxygenates are understood to be all oxygen-containing hydrocarbon compounds which can be converted under oxygenate conversion conditions into olefins, especially short-chain olefins such as propylene and other hydrocarbon products.

[0046] Short-chain olefins according to the invent...

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Abstract

A process and a plant for producing olefins from oxygenates such as methanol and / or dimethyl ether are proposed, in which initially the oxygenates are converted to a primary product containing propylene, other olefins, paraffins and aromatics in an olefin synthesis reactor. The primary product is separated into hydrocarbon fractions of different C chain length, wherein short-chain olefins such aspropylene are obtained and beside further fractions there is also obtained a C7- fraction which contains C5 / C6 olefins, as well as a C7+ fraction which contains aromatics. From the latter, the aromatics are separated and alkylated with the C5 / C6 olefins to obtain alkyl aromatics. The same are hydrogenated completely and recirculated to the olefin synthesis reactor, where they likewise are converted to short-chain olefins.

Description

technical field [0001] The present invention relates to the petrochemical field, and more specifically, the present invention provides a method for producing olefins from oxygenates and equipment for performing the method. Background technique [0002] Propylene (C 3 h 6 ) is one of the most important starting materials in the chemical industry. Worldwide, there is an increasing demand for the base material propylene, where, like ethylene, it is mainly produced from petroleum in steam crackers, the ratio of which depends on process conditions and raw materials. [0003] There are many methods for obtaining more propene, for example the dehydrogenation of propane starting from propane as educt. However, the most important known is the so-called MTP (methanol to propylene) process, in which so-called oxygenates such as methanol (MeOH) or dimethyl ether (DME) are converted into olefins by catalytic conversion over zeolite catalysts. By varying the catalyst and process condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C7/00C07C7/04C07C11/06
CPCC07C1/20C07C7/00C07C7/04C07C11/06C07C41/09C07C2/66C07C5/10C10G3/42C10G29/205C10G45/44C10G7/00C10G2400/20Y02P30/20C07C7/08C07C2601/14C10G69/123C10G2300/1081C10G2300/1088C10G2400/22C07C15/02C07C13/18C07C43/043
Inventor 英戈·鲍尔马丁·罗泰梅尔
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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