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Method for preparing propanol through catalytic conversion of methanol

A technology for catalyzing methanol and catalytic conversion, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of production shutdown, production reduction, poor compatibility, etc., to reduce dependence on petroleum, important application prospects, Efficient effect of the reaction process

Inactive Publication Date: 2015-09-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, the total production capacity of methanol in China reached 35 million tons in 2010 (Yu Hong, the overcapacity situation of methanol may intensify this year, Chemical Online Weekly, 2011, 3, 8-9); The inherent disadvantages of methanol, such as toxicity and poor compatibility with gasoline, have affected the large-scale promotion and use of methanol as a vehicle fuel. As a result, the operating rate of domestic enterprises is less than 40%, and nearly 20 million tons of production capacity is idle. Methanol manufacturers have reduced production, The phenomenon of production shutdown is common (Yin Xiaoyong et al., Several Suggestions for the Development of Methanol Industry in my country, International Petroleum Economics, 2011, July, 37-40; Wang Xiangqian et al., The imbalance between supply and demand of methanol will continue, Chemical Science and Technology, 2012, June, 69- 71; Li Feng, Development and Trend Analysis of my country's Methanol Industry, Coal Chemical Industry, 2013, 1, 8-12)

Method used

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  • Method for preparing propanol through catalytic conversion of methanol
  • Method for preparing propanol through catalytic conversion of methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Take the impregnation method to prepare Cu-Cr / ZSM-5 catalyst as an example to describe the steps of impregnation method to prepare supported composite metal oxide catalyst: according to Cu:Cr molar ratio=2:1, weigh 2.44g nitric acid respectively Copper [Cu(NO 3 ) 2 ·3H 2 O] and 2.02g (Cu:Cr molar ratio = 1:1, 4.04g) chromium nitrate [Cr(NO 3 ) 3 9H 2 O] as a raw material, dissolved in 40ml deionized water, and prepared into an active component salt solution (wherein the loading of the active component is 0.1-20%, and the two-component Cu:Cr molar ratio is 0.1-10:1, as in this 2:1 and 1:1 respectively), the carrier ZSM-5 was immersed in the solution for 24 hours; then the solution was evaporated to dryness, and then calcined at 500°C for 4 hours to obtain the CuCr / ZSM-5 catalyst.

Embodiment 2

[0019] Example 2: 10ml of Cu-Cr / ZSM-5 (where Cu:Cr molar ratio = 2:1, active metal component loading is 10%) catalyst particles synthesized in the laboratory were loaded into a fixed-bed reactor, replaced by nitrogen The air in the system was followed by hydrogen gas, and the reaction temperature was raised to 350°C. Use a pump to feed methanol into the reactor to contact with the catalyst for reaction, the feed space velocity of methanol is 2h -1 , the reaction pressure is 0.5MPa. After the reaction was stable, the sample was analyzed by Agilent7890A-5973C GC-MS coupled instrument and HP-5 chromatographic column for product composition (such as figure 2 shown), mainly propanol (including n-propanol and isopropanol), and a small amount of ethanol, n-butanol and isobutanol were also detected, and the reaction products were quantitatively analyzed by Agilent7890A. Combined with the results of gas chromatography analysis, the selectivity of propanol in the product was calculat...

Embodiment 3

[0020] Example 3: 10ml of Cu-Cr / ZSM-23 (where Cu:Cr molar ratio = 1:1, active metal component loading is 10%) catalyst particles synthesized in the laboratory were loaded into a fixed-bed reactor and replaced with nitrogen The air in the system was followed by hydrogen gas, and the reaction temperature was raised to 380°C. Use a pump to feed methanol into the reactor to contact with the catalyst for reaction, the feed space velocity of methanol is 2.5h -1 , the reaction pressure is 2.0MPa. After the reaction was stable, the product was analyzed according to the method in Example 2, and the selectivity to propanol was 75.3%.

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Abstract

The invention relates to a method for preparing propanol through catalytic conversion of methanol. According to the method, methanol is directly used as a raw material, a molecular sieve supporting composite metal oxide containing two or more than two elements selected from iron, cobalt, manganese, copper, molybdenum, vanadium, tungsten and chromium is adopted as a catalyst, and in a fixed bed reactor, methanol is subjected to catalytic conversion to prepare the propanol. According to the present invention, the method is the propanol preparing route directly adopting the methanol as the raw material, and directly adopts the domestic excess methanol as the raw material to prepare the important chemical industry raw material propanol so as to expand the downstream use of the methanol, and the catalyst is the non-noble metal catalyst and is cheap and easily-available, such that the method has important application prospects.

Description

technical field [0001] The present invention relates to the synthesis method of chemical raw materials, especially to a new method for catalytic conversion of methanol to synthesis of propanol. Specifically, methanol is used as raw material and molecular sieves are loaded with iron, cobalt, manganese, copper, molybdenum, vanadium, tungsten The composite metal oxide of two or more elements in chromium and chromium is used as a catalyst, and methanol is catalyzed in a fixed-bed reactor to obtain propanol in a hydrogen atmosphere. Background technique [0002] Propanol includes two isomers of n-propanol (1-propanol) and isopropanol (2-propanol), which are important chemical raw materials and liquid fuel additives. 60-70% of the total consumption of propanol is used in the production of chemicals and as a solvent. In addition, it is also used as an additive for liquid fuels, which are widely used in automobiles and aviation fuels. [0003] The preparation methods of propanol ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/10C07C29/32B01J29/48B01J29/78B01J29/16B01J29/24B01J29/76
Inventor 孙颖刘俊霞徐杰高进黄义争苗虹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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