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Catalyst for oriented synthesis of isobutanol by synthesis gas as well as preparation method and application of catalyst

A directional synthesis and catalyst technology, which is applied in the preparation of organic compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of unsuitable temperature control and large reaction temperature difference between upper and lower catalysts , to achieve the effect of improving the utilization rate of carbon resources, simple design and easy operation

Active Publication Date: 2015-01-07
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

This process has the disadvantages of large reaction temperature difference between the upper and lower layers of the catalyst, and the temperature is not suitable for control.

Method used

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  • Catalyst for oriented synthesis of isobutanol by synthesis gas as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1, 365.6gZn(NO 3 ) 2 ·6H 2 O was prepared as a 1M solution and co-precipitated with 3M ammonium carbonate solution at 50°C and pH=9. After the precipitation is completed, continue aging at the precipitation temperature for 5 hours, filter, wash, and suction filter, dry at 100°C for 15 hours, and then roast at 350°C for 7 hours to obtain ZnO.

[0032] Step 2, 526.5gCr(NO 3 ) 3 9H 2 O was formulated as a 1M solution and co-precipitated with a 2M ammonium carbonate solution to prepare the catalyst. Precipitation, drying and roasting process are the same as step 1, and Cr 2 o 3 .

[0033] Step 3, the ZnO that step 1, step 2 make, Cr 2 o 3 Mix well, with K 2 CO 3 Impregnate an equal volume of potassium for the precursor. After impregnating potassium, the drying and roasting process is the same as in step 1 to obtain K 2 O-ZnO-Cr 2 o 3 Catalyst A. The weight percentage of each component in the catalyst A: K 2 O is 2.5, ZnO is 60.0, Cr 2 o 3 was 37.5. ...

Embodiment 2

[0040] Step 1, 365.6gZn(NO 3 ) 2 ·6H 2 O was prepared as a 2M solution and co-precipitated with 1M ammonium carbonate solution at 60°C and pH=7. After the precipitation is completed, continue aging at the precipitation temperature for 2 hours, filter, wash, and suction filter, dry at 110°C for 10 hours, and then roast at 400°C for 5 hours to obtain ZnO.

[0041] Step 2, 526.5gCr(NO 3 ) 3 9H 2 O was formulated as a 2M solution and co-precipitated with a 3M ammonium carbonate solution to prepare the catalyst. Precipitation, drying and roasting process are the same as step 1, and Cr 2 o 3 .

[0042] Step 3, the ZnO that step 1, step 2 make, Cr 2 o 3 Mix well, with K 2 CO 3 Impregnate an equal volume of potassium for the precursor. After impregnating potassium, the drying and roasting process is the same as in step 1 to obtain K 2 O-ZnO-Cr 2 o 3 Catalyst A. The weight percentage of each component in the catalyst A: K 2 O is 1.0, ZnO is 54.0, Cr 2 o 3 is 45.0. ...

Embodiment 3

[0049] Step 1, 365.6gZn(NO 3 ) 2 ·6H 2 O was prepared as a 3M solution and co-precipitated with 2M ammonium carbonate solution at 70°C and pH=6. After the precipitation is completed, continue to age at the precipitation temperature for 6 hours, filter, wash, and suction filter, dry at 130°C for 20 hours, and then roast at 500°C for 4 hours to obtain the ZnO catalyst.

[0050] Step 2, 526.5gCr(NO 3 ) 3 9H 2 O was prepared as a 2M solution, and the catalyst was co-precipitated with 1M ammonium carbonate solution. Precipitation, drying and roasting process are the same as step 1, and Cr 2 o 3 catalyst.

[0051] Step 3, the ZnO that step 1, step 2 make, Cr 2 o 3 Mix well, with K 2 CO 3 Impregnate an equal volume of potassium for the precursor. After impregnating potassium, the drying and roasting process is the same as in step 1 to obtain K 2 O-ZnO-Cr 2 o 3 Catalyst A. The weight percentage of each component in the catalyst A: K 2 O is 2.0, ZnO is 42.0, Cr 2 o ...

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Abstract

The invention discloses a catalyst for oriented synthesis of isobutanol by synthesis gas. The catalyst comprises a catalyst A and a catalyst B according to the volume ratio of 0.5-1.5 to 1, wherein the catalyst A comprises 1-6% of K2O, 20-66% of ZnO and 30-75% of Cr2O3 by weight percentage; and the catalyst B comprises 1-5% of K2O, 20-50% of ZnO, 40-75% of Cr2O3, 1-10% of Dy2O3 and 1-5% of Y2O3 by weight percentage. The catalyst has the advantages of high isobutanol selectivity and high carbon resource utilization rate.

Description

technical field [0001] The invention relates to a catalyst for synthesizing isobutanol, in particular to a catalyst for directional synthesizing isobutanol from synthesis gas and its preparation method and application. Background technique [0002] Isobutanol is a basic organic chemical raw material for the manufacture of antioxidants, 2,6-di-tert-butyl-p-cresol, cresol, isobutyl acetate (paint solvent), isobutyl butyrate, isobutyrate Butyl ester (food flavor), isobutyl lactate, isobutyronitrile (fine chemical intermediate), diisobutyl phthalate plasticizer, synthetic rubber, artificial musk, fruit essential oil and synthetic drugs, etc. my country is a country rich in rare earth resources, and isobutanol is widely used as a solvent in the purification of salts such as strontium, barium and lithium in the production of rare earths, and the market demand is huge. [0003] At present, industrial isobutanol mainly comes from the by-products of butanol produced by propylene car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/26C07C31/12C07C29/153
Inventor 谭猗生解红娟武应全寇永利韩怡卓张涛谭理
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI