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Method for producing propylene and co-producing ethylbenzene by converting methanol

A technology for propylene and methanol, which is applied in chemical instruments and methods, ethylene production, and hydrocarbon production from oxygen-containing organic compounds, and can solve the problem of low added value of products

Active Publication Date: 2016-09-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing methanol conversion to propylene technology can only obtain propylene, and the product has low added value. A new method for methanol conversion to propylene to co-produce ethylbenzene is provided

Method used

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  • Method for producing propylene and co-producing ethylbenzene by converting methanol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] With 50 g SiO 2 / Al 2 o 3 The ZSM-5 zeolite of (molar ratio)=1000 is active component, adds 40 silica sols (SiO 2 40% by weight) after molding and drying, take 10 grams of the above molded product, impregnate 10 grams of cerium nitrate solution containing Ce2% (weight percentage) for 12 hours, dry, and bake at 500 ° C for 4 hours to obtain 2%Ce modification, SiO 2 / Al 2 o 3 (Molar ratio) = 1000 ZSM-5 catalyst, as a catalyst for methanol conversion to propylene .

[0023] With 20 g SiO 2 / Al 2 o 3 (Molar ratio)=50 ZSM-5 / ZSM-11 co-crystal structure zeolite is the active component, add 5 grams of binder alumina, 15 grams of water, knead, extrude, dry at 120 ° C, and roast at 450 ° C for 5 hours, the catalyst for the alkylation reaction of ethylene and benzene is obtained .

[0024] With 20 g SiO 2 / Al 2 o 3 The dealuminated mordenite with a molar ratio of 20 is used as the active component. Add 10% binder silica, 30g water, knead, extrude, dry at 120°C, and ...

Embodiment 2

[0029] With 50 g SiO 2 / Al 2 O3 mol ratio is that the ZSM-5 zeolite of 600 is an active component, adds 20 gram binder silicon oxides, 50 gram water extruded bar molding, after drying, gets above-mentioned molded object 10 grams, with 10 grams containing Ce0.05% ( % by weight) in a cerium nitrate solution soaked overnight, dried, and baked at 550°C for 4 hours to make 0.05% Ce modified, SiO 2 / Al 2 o 3 (Molar ratio) = 600 ZSM-5 catalyst, as a catalyst for methanol conversion to propylene . Adopt fixed bed reaction process, 60% methanol aqueous solution is used as raw material, reaction temperature is 450°C, reaction pressure is 0.05MPa, methanol weight space velocity is 0.5h -1 . The reaction results are as follows: methanol conversion rate 99.8%, product distribution: methane 0.48%, ethane 0.16%, ethylene 13.9%, propylene 35.5%, propane 3.23%, carbon four 24.5%, carbon five and above 20.8%. Pass propane and C4 hydrocarbons into the above-mentioned methanol conversion ...

Embodiment 3

[0033] With 50 g SiO 2 / Al 2 The ZSM-5 zeolite of O3 (molar ratio)=100 is an active component, adds 15 grams of binder alumina, 50 grams of water extrusion molding, after drying, takes 10 grams of above-mentioned molded objects, with 10 grams containing Ce1% ( % by weight) in cerium nitrate solution for 5 hours, dried, and baked at 550°C for 4 hours to make 1% Ce modified, SiO 2 / Al 2 o 3 (Molar ratio) = 100 ZSM-5 catalyst, as a catalyst for methanol conversion to propylene . Using fixed bed reaction process, 60% methanol and 40% dimethyl ether as raw materials, the reaction temperature is 550°C, the reaction pressure is 0.1MPa, and the weight space velocity of methanol is 2h -1 . The reaction results are as follows: methanol conversion rate 99.6%, product distribution: methane 0.38%, ethane 0.14%, ethylene 12.8%, propylene 36.5%, propane 3.18%, carbon four 26.6%, carbon five and above 18.9%. Pass propane and C4 hydrocarbons into the above-mentioned methanol conversion...

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Abstract

The invention relates to a method for preparing propylene co-production ethylbenzene by methanol conversion or dimethyl ether conversion. The method mainly solves the problems that only propylene is generated by the existing propylene preparation technique by methanol, and an additional value of a product is low. The method comprises the steps that a reaction raw material, namely methanol or dimethyl ether is contacted with a catalyst I in a reactor I to generate a hydrocarbon mixture rich in propylene; propylene is separated from the hydrocarbon mixture; separated dimethylmethane and C4 hydrocarbon return to the methanol conversion reactor I for cyclic reaction; light components containing hydrogen and methane and benzene are separated and undergo hydrocarbonylation reaction in the presence of the catalyst I in a reactor II; a reaction product is subjected to gas-liquid separation; tail gas passes through a low-temperature absorption discharge device; cyclic benzene, ethylbenzene, propyl benzene, diethylbenzene and heavy components are sequentially separated from a liquid product by a separation system; and diethylbenzene and benzene are mixed to enter a reverse hydrocarbonylation reactor, react in the presence of a catalyst III and are further converted into ethylbenzene. With the adoption of the technical scheme, the problems are solved better, so that the method can be used in industrial production of propylene and ethylbenzene preparation by methanol or dimethyl ether conversion.

Description

technical field [0001] The invention relates to a method for converting methanol or dimethyl ether to produce propylene and co-produce ethylbenzene. Background technique [0002] Methanol is a rich source of industrial raw materials and the cornerstone of C1 chemistry and chemical industry. The synthesis and conversion of methanol has always been a very active subject. Due to the shortage of petroleum resources and the relative abundance of coal resources in my country, my country's coal chemical industry has experienced an unprecedented hot situation in recent years, and various coal chemical projects have been launched in various places. As a relatively mature coal chemical technology, coal-based synthetic methanol has become the majority of coal. The preferred project of chemical enterprises, methanol production is increasing year by year. Regarding the planning and construction of my country's methanol projects, although there are differences in various statistical data,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C1/20C07C15/073C07C2/66C07C6/00
CPCY02P30/20Y02P30/40
Inventor 任丽萍滕加伟徐建军李斌杨为民
Owner CHINA PETROLEUM & CHEM CORP