Process for preparing arene selectivity by enhancing methanol aromatizatian and process for preparation of catalyst thereof

An aromatization and selective technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of little effect of modified HZSM-5 molecular sieve, and achieve increased yield and improved yield. rate, the effect of improving selectivity

Active Publication Date: 2009-10-07
TIANJI COAL CHEM IND GROUP +1
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Problems solved by technology

The present invention mixes and modifies the HZSM-5 molecular sieve catalyst by mixing different active ions, aiming at improving the selectivity of methanol aromatization conversion to produce aromatics. At the same time, it is found in a large number of studies that lanthanum has little effect on modifying the HZSM-5 molecular sieve , which is different from the previous research

Method used

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  • Process for preparing arene selectivity by enhancing methanol aromatizatian and process for preparation of catalyst thereof

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Experimental program
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Effect test

Embodiment 1

[0012] 1. Catalyst Preparation

[0013] (1) Weigh 30 grams of a commercially available powdered HZSM-5 molecular sieve with a Si / Al (atomic ratio) of 38, and bake it at 520° C. for 4 hours to remove volatile components.

[0014] (2) Take 15 grams of the molecular sieve obtained in step (1) in a mortar, add 5 grams of pseudo-boehmite, mix thoroughly, and grind evenly.

[0015] (3) Add 5wt% nitric acid dropwise to the ground material, knead properly, pass through a 100-mesh sieve, press into tablets with a rotary tablet press, put into an oven and dry at 110°C.

[0016] (4) Put the prepared flaky molecular sieve into a high-temperature furnace, firstly raise the temperature to 120°C by step heating method, keep the temperature for 0.5 hours, then raise the temperature to 300°C, keep it for 1 hour, and finally raise the temperature to 520°C, keep it for 4 hours, To remove nitric acid and moisture, etc., then cool down to room temperature naturally, and process it into a block wi...

Embodiment 2

[0042] In step (3), the material after passing through the 100-mesh sub-sieve can also be extruded into a columnar shape with a diameter of 2-3mm by a screw extruder.

[0043] Using copper, zinc, gallium, phosphorus, and silver mixed with various ions, according to the above-mentioned embodiment 1, adopting a fluidized bed method to catalyze the reaction, the yield of the obtained aromatics can reach 55-70wt%.

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Abstract

The invention relates to a process for preparing arene selectivity by enhancing methanol aromatizatian. The process uses methanol as raw material, compositely modifies HZSM-5 molecular sieve catalyst by active ions like Ga, Zn, Cu, Cr and Ag for catalyzing methanol aromatizatian, employs the fixed bed continuous process or the floating bed continuous process, wherein the reaction pressure is 0.1-3.5MPa; the reaction temperature is 380-500 DEG C; the space velocity of raw material liquid is 0.1-10.0 h; and N2 space velocity is 120-800 h. The advantages of the invention lie in collocation combination of mixing ion modification, and arene selectivity reaches to 70%.

Description

technical field [0001] The invention relates to a process for improving the selectivity of methanol aromatization for producing aromatic hydrocarbons and a preparation method of a catalyst thereof. Background technique [0002] Aromatic hydrocarbons are a kind of strategic material, which is the raw material of medicine, pesticide, dyestuff, organic material and basic chemical industry. Most of the pharmaceuticals and pesticides contain aromatic hydrocarbon basic units, almost all dyes use aromatic hydrocarbon raw materials, and various additives in organic materials and advanced electronic materials are also inseparable from aromatic hydrocarbon raw materials. At present, aromatics are mainly derived from petroleum refining. With the deep excavation and extensive use of disposable petroleum resources, the output is decreasing day by day. Therefore, the development of new aromatics production process has important strategic and practical significance. [0003] Methanol is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/88C07C15/00B01J29/44B01J29/48
Inventor 荆宏健冯军强杨丰科纵秋云夏亚穆刘金亮
Owner TIANJI COAL CHEM IND GROUP
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