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Utilization method of tertiary butyl alcohol coproduced by using device for producing epoxypropane by using propene and iso-butane cooxidation method

A co-oxidation method, propylene oxide technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as affecting product economy, tert-butanol cannot be directly used, and large costs are increased.

Active Publication Date: 2013-05-08
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Visible, according to existing technology, the t-butanol co-production of this POMTBE unit can't be used directly, and purifying this tert-butanol needs to increase a large amount of cost, has a strong impact on the economy of product

Method used

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  • Utilization method of tertiary butyl alcohol coproduced by using device for producing epoxypropane by using propene and iso-butane cooxidation method
  • Utilization method of tertiary butyl alcohol coproduced by using device for producing epoxypropane by using propene and iso-butane cooxidation method
  • Utilization method of tertiary butyl alcohol coproduced by using device for producing epoxypropane by using propene and iso-butane cooxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Preparation of catalyst:

[0059] Preparation of the first stage catalyst:

[0060] To 750 parts of deionized water, add 449 parts of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 ·4H 2 O, molecular weight 1236) and 22.3 parts of ammonium metavanadate (NH 4 VO 3 , Molecular weight: 117), while stirring, the temperature is raised to 80°C, and 339 parts of bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O, molecular weight 485), 317 parts of iron nitrate (Fe(NO 3 ) 3 ·9H 2 O, molecular weight 404), 111 parts of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O, molecular weight 291), 20.5 parts of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O, molecular weight 242) and 20.7 parts of cesium carbonate (Cs 2 CO 3 , Molecular weight 326) was dissolved in 370 parts of nitric acid solution with a mass concentration of 10%. After stirring for 30 minutes, ammonia water was added to adjust the pH to 3.0. After aging the slurry for 10 hours, it was placed in a 90℃ blast drying oven for 12 hours. Finally, the catalyst After b...

Embodiment 2

[0076] Preparation of catalyst:

[0077] Preparation of the first stage catalyst:

[0078] To 750 parts of deionized water, add 449 parts of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 ·4H 2 O, molecular weight 1236), 11.2 parts of niobium pentoxide (Nb 2 O 5 , Molecular weight: 265.8) and 7.4 parts of ammonium metavanadate (NH 4 VO 3 , Molecular weight: 117), while stirring, the temperature is raised to 80°C, and 102.7 parts of bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O, molecular weight 485), 599 parts of iron nitrate (Fe(NO 3 ) 3 ·9H 2 O, molecular weight 404), 123.3 parts of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O, molecular weight 291), 102.5 parts of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O, molecular weight 242) and 13.8 parts of cesium carbonate (Cs 2 CO 3 , Molecular weight 326) was dissolved in 370 parts of nitric acid solution with a mass concentration of 10%. After stirring for 30 minutes, ammonia water was added to adjust the pH to 3.0. After aging the slurry for 10 hours, it was plac...

Embodiment 3

[0095] Preparation of catalyst:

[0096] Preparation of the first stage catalyst:

[0097] Add 449 parts by weight of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 ·4H 2 O, molecular weight 1236), 5.6 parts of niobium pentoxide (Nb 2 O 5 , Molecular weight: 265.8) and 99.0 parts of ammonium metavanadate (NH 4 VO 3 , Molecular weight: 117), heat to 80℃ while stirring, add 152.5 parts of bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O, molecular weight 485), 171.2 parts of iron nitrate (Fe(NO 3 ) 3 ·9H 2 O, molecular weight 404), 246.4 parts of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O, molecular weight 291), 76.9 parts of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O, molecular weight 242) and 51.8 parts of cesium carbonate (Cs 2 CO 3 , Molecular weight 326) was dissolved in 370 parts of nitric acid solution with a mass concentration of 10%. After stirring for 30 minutes, ammonia water was added to adjust the pH to 3.0. After aging the slurry for 10 hours, it was placed in a 90℃ blast drying oven for 12 hours. F...

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Abstract

The invention relates to a utilization method of tertiary butyl alcohol coproduced by using a device for producing epoxypropane by using a propene and iso-butane cooxidation method. According to the method, after an acetone containing tertiary butyl alcohol solution by-produced by the device is evaporated, the evaporated solution, air and diluent gas and the like constitute mixed gas according to certain proportion, and after the mixed gas is preheated, the mixed gas is subjected to first-stage oxidation. After the composition and temperature of oxidative products obtained through the first-stage oxidation are adjusted, the oxidative products are subjected to second-stage oxidation. After oxidative products obtained through the second-stage oxidation are absorbed, a crude methacrylic acid aqueous solution capable of being used for refining is obtained. By using the method disclosed by the invention, coproduced tertiary butyl alcohol can be directly used for preparing methacrylic acid without refining and purification.

Description

Technical field: [0001] The invention relates to a method for preparing methacrylic acid by oxidation of tert-butanol, in particular to a two-stage oxidation of tert-butanol to prepare methyl methacrylic acid by co-production of propylene oxide from a device for co-oxidation of propylene and isobutane. Acrylic method. Background technique: [0002] Propylene oxide (PO) is the main raw material for the production of polyether polyols in the polyurethane industry. At present, the methods for producing PO in industry mainly include halohydrin method, co-oxidation method and HPPO method. The output of PO produced by co-oxidation in the world accounts for about half of the total output of PO, and co-oxidation mainly includes POSM and POMTBE processes. The POSM process uses propylene and ethylbenzene as raw materials, and the products are PO and styrene. The POMTBE process uses propylene and isobutane as raw materials, the main product is PO, and the co-product can be methyl tert-bu...

Claims

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Application Information

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IPC IPC(8): C07C57/05C07C51/23
Inventor 楼银川万毅易光铨吴训锟杨雪峰胡展于天勇李庆黎源华卫琦
Owner WANHUA CHEM GRP CO LTD
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