Catalyst for preparing mixed alcohol with low carbon from synthesis gas and its preparing process

A low-carbon mixed alcohol and catalyst technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of harsh requirements, loss of cobalt, catalyst stability and life limit, etc., to ensure stability and longevity, the effect of preventing loss

Inactive Publication Date: 2004-09-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two main problems with this catalyst. One is the strict requirements on the hydrogen-to-carbon ratio of the feed gas. 2 / CO must be between 1.0-1.1; the second is that cobalt carbonyl is easily formed between the catalyst additive cobalt and carbon monoxide, resulting in the loss of cobalt, affecting the activity and selectivity of the catalyst, resulting in limited catalyst stability and life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 .24H 2 O) 12g and a concentration of not less than 17% ammonium sulfide ((NH 4 ) 2 S) 18.5g of the solution was reacted for half an hour at 40°C with stirring, and then 50ml of concentrated acetic acid (CH 3 COOH) reacted for another half an hour to finally generate ammonium thiomolybdate solution, and then add ion-free water to completely dissolve part of the precipitate. Weigh nickel acetate (Ni(CH 3 COO) 2 .4H 2 O) 6.3g, manganese acetate (Mn(CH 3 COO) 2 .4H 2 O) 6.8 g and 120 ml of non-ionized water are used to prepare an aqueous solution, and the ammonium thiomolybdate solution is dropped in parallel at 40° C. and reacts with stirring to form a precipitate. After washing with methanol, it was filtered. The precipitate was dried at 120°C to obtain a precipitate. Then 2.8 g of potassium carbonate was added. After uniform mixing, it is placed in a tube furnace under nitrogen atmosphere for calcination at 550°C for 1 hour, and after ...

Embodiment 2

[0029] Weigh ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 .24H 2 O) 16.0g was added to a three-necked flask with 250ml ion-free water, and hydrogen sulfide (H 2 S) 15L of gas, react for half an hour at 60°C with stirring, and then add 75ml of concentrated acetic acid (CH 3 COOH) reacted for another half an hour to finally generate ammonium thiomolybdate solution, and then add ion-free water to completely dissolve part of the precipitate. Weighing configuration nickel acetate (Ni(CH 3 COO) 2 .4H 2 O)7.0g, manganese acetate (Mn(CH 3 COO) 2 .4H 2O) 7.5 g and 150 ml of non-ionized water are used to prepare an aqueous solution, and the ammonium thiomolybdate solution is dropped in parallel at 40° C. and reacts with stirring to form a precipitate. After washing with citric acid, filter. The precipitate was dried at 110°C to obtain a precipitate. Then, 3.0 g of potassium hydroxide was added, mixed uniformly, and calcined at 500° C. for 1.5 hours under a nitrogen atmosphere in a tube furnace. ...

Embodiment 3

[0031] Ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 ·24H 2 O) 6.9g and a concentration of not less than 17% ammonium sulfide ((NH 4 ) 2 S) 10.7g of the solution was reacted for half an hour at 60℃ and stirring, and 50ml of concentrated acetic acid (CH 3 COOH) reacted for another half an hour to finally generate ammonium thiomolybdate solution, and then add ion-free water to completely dissolve part of the precipitate. Weighing configuration nickel acetate (Ni(CH 3 COO) 2 .4H 2 O) 5.0g, manganese acetate (Mn(CH 3 COO) 2 ·4H 2 O) 9.3 g and 150 ml of non-ionized water are used to prepare an aqueous solution, and the ammonium thiomolybdate solution is dropped in parallel at 50° C. and reacts with stirring to form a precipitate. After washing with ethanol, filter. The precipitate was dried at 100°C to obtain a precipitate. Then, 2.5 g of potassium carbonate prepared aqueous solution was added, immersed in an equal volume for 6 hours, dried at 80°C, and calcined in a tube furnace at 500°C un...

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PUM

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Abstract

A catalyst for preparing low-carbon alcohol mixture from synthetic gas contains Mo (2-40 %), Ni (4-10%), Mn (0.1-5.0%), K (5-15%), S (20-40%) and bentone, and is prepared through reaction of ammonium sulfide solution or hydrogen sulfide gas on ammonium molybdate, adding concentrated acetic acid, thermal stirring, cooling for deposition, adding deionized water for dissolving doposit to obtain solution of ammonium thiomolybdate, dropping the solution along with the mixed solution of nickel acetate and manganese acetate in acetic acid to form black deposit, filtering, washing, baking, mixing with bentone, and tabletting. Its advantages are high resistance to S and no carbon deposit.

Description

Technical field: [0001] The invention provides a synthesis gas (CO and H 2 ) A catalyst for preparing mixed lower alcohols and a preparation method thereof mainly relates to a molybdenum-based sulfide catalyst. Background technique: [0002] Whether it is worldwide or in China, energy strategy is a very important issue. With the depletion of oil resources, the future energy structure will shift to coal and natural gas. Coal is my country's main energy resource, but with the deteriorating environment, the clean utilization of coal has become an urgent task. From the perspective of effective utilization of resources, the research on the indirect conversion of coal into liquid fuels and chemicals has broad application prospects. [0003] The application prospects of low-carbon alcohols have become increasingly clear. As a fuel additive, it has good solubility, volatility, driving operability and high octane number. In addition, it can also be used as a raw material and clean fuel fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J27/02C07C29/153
Inventor 孙予罕李文怀马玉刚张侃钟炳
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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