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Catalyst for two-step methanol to gasoline alkylation and preparation method thereof

A methanol-to-gasoline and catalyst technology, which is applied in the preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of catalyst deactivation, short catalyst single-pass life, low selectivity, etc., and achieve gasoline selectivity High, stable performance, and the effect of improving catalytic ability

Inactive Publication Date: 2016-12-14
河南博洁能源工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the technology of methanol to gasoline has been developed rapidly, the ZSM-5 molecular sieve catalyst is still prone to deactivation due to carbon deposition, which makes the single-pass life of the catalyst short and low in selectivity

Method used

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  • Catalyst for two-step methanol to gasoline alkylation and preparation method thereof
  • Catalyst for two-step methanol to gasoline alkylation and preparation method thereof
  • Catalyst for two-step methanol to gasoline alkylation and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of preparation method of the catalyst that two-step process methanol is used for gasoline alkylation comprises the following steps:

[0026] 1) Add NaZSM-5 molecular sieve with a molar ratio of silicon to aluminum of 100 into 0.2mol / L ammonium chloride solution, stir evenly, the solid-liquid ratio is 1:10, exchange ammonium at 90°C for 2 hours, wash with water, and After drying at 120°C for 5 hours, calcining at 650°C for 6 hours to obtain HZSM-5 molecular sieve, and then performing hydrothermal treatment at 400°C for 3 hours, then cooling to room temperature, the liquid phase mass space velocity of water is 1h -1 ;

[0027] 2) At 80°C, add the molecular sieve obtained in step 1) into an acid solution with a molar concentration of 1mol / L for pickling, the solid-to-liquid ratio is 1:10, after immersion for 4 hours, suction filtration, deionized water washing, suction filtration, Calcined at 600°C for 4 hours to obtain acid-washed HZSM-5 molecular sieve;

[0028]...

Embodiment 2-4

[0031] The solutions containing active metal additives in step 4) of Examples 2-4 are respectively: ferric nitrate solution, ammonium molybdate solution, and nickel nitrate solution of the same concentration, and others refer to Example 1.

Embodiment 5-6

[0033] The acid solutions in step 2) in Example 5-6 are respectively 1 mol / L nitric acid and molybdic acid, and others refer to Example 1.

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Abstract

A catalyst for two-step methanol to gasoline alkylation comprises the following components by weight: 35-80% of an ZSM-5 molecular sieve, 15-60% of a metal, and 0.5-5% of an active metal auxiliary agent calculated by the content of metal simple substance, wherein the silicon to aluminum ratio of the ZSM-5 molecular sieve is 20-300. A preparation method comprises the following steps: subjecting the HZSM-5 molecular sieve to hydrothermal treatment; pickling molecular sieve with the solid-liquid ratio of 1:(1-10), immersing, carrying out pumping filtration, and roasting to obtain pickled HZSM-5 molecular sieve; mixing the pickled HZSM-5 molecular sieve with the binder and water, extruding strips for molding, drying, and then roasting for 3 to 5 hours to obtain strip modified ZSM-5 molecular sieve; adding the strip modified ZSM-5 molecular sieve into a nitrate, sulfate or ammonium molybdate solution containing an active metal additive, immersing, washing, filtering, drying, and roasting for 3-5 h. The modified catalyst has the advantages of good stability, prolonged one-way service life, improved catalytic capacity and high gasoline selectivity.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for the alkanization of methanol to gasoline by a two-step process and a preparation method thereof. Background technique [0002] Methanol is a key product in the coal chemical industry. In recent years, with the development of my country's coal chemical industry, my country's methanol industry has developed rapidly, and methanol is the first choice for the initial projects of coal chemical industry in various places, which has led to a rapid increase in methanol production capacity. From 2011 to 2015, the new production capacity has reached 53.3 million tons; the production capacity of methanol has far exceeded the actual demand. Therefore, it is necessary to actively develop downstream products of methanol, increase new application fields of methanol, and improve the efficiency of existing methanol downstream products. The level of production technolo...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/46B01J29/48C10G3/00
CPCY02P30/20B01J29/405B01J29/46B01J29/48C10G3/49C10G2300/70C10G2400/02
Inventor 秦如浩陈忠民
Owner 河南博洁能源工程技术有限公司
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