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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 technology of co-oxidation and propylene oxide, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems that tert-butanol cannot be used directly, affects product economy, and increases cost

Active Publication Date: 2015-06-10
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] Catalyst preparation:

[0059] Preparation of the first stage catalyst:

[0060] 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), heated up to 80°C while stirring, and added 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 cesium carbonate (Cs 2 CO 3 , molecular weight 326) was dissolved in 370 parts of nitric acid solution with a mass concentration of 10%, continued to stir for 30 minutes, then added ammonia water to adjust the pH to 3.0, aged the slurry for 10 hours and dried it in a blast drying oven at 90°C for 12 hours, and finally the catalyst After being ground into fine po...

Embodiment 2

[0076] Catalyst preparation:

[0077] Preparation of the first stage catalyst:

[0078] Add 449 parts of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, molecular weight 1236), 11.2 parts niobium pentoxide (Nb 2 o 5 , molecular weight: 265.8) and 7.4 parts of ammonium metavanadate (NH 4 VO 3 , molecular weight: 117), heated up to 80°C while stirring, and added 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 cesium carbonate (Cs 2 CO 3 , molecular weight 326) was dissolved in 370 parts of nitric acid solution with a mass concentration of 10%, continued to stir for 30 minutes, then added ammonia water to adjust the pH to 3.0, aged the slurry for 10 hours and dried it in a blast drying oven at 90°...

Embodiment 3

[0095] Catalyst preparation:

[0096] Preparation of the first stage catalyst:

[0097] Add 449 parts by weight ammonium heptamolybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, molecular weight 1236), 5.6 parts niobium pentoxide (Nb 2 o 5 , molecular weight: 265.8) and 99.0 parts of ammonium metavanadate (NH 4 VO 3 , Molecular weight: 117), heated up to 80°C while stirring, and added 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 cesium carbonate (Cs 2 CO 3 , molecular weight 326) was dissolved in 370 parts of nitric acid solution with a mass concentration of 10%, continued to stir for 30 minutes, then added ammonia water to adjust the pH to 3.0, aged the slurry for 10 hours and dried it in a blast drying ove...

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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 oxidizing tert-butanol, specifically a method for producing propylene oxide through a two-stage oxidation of tert-butanol co-produced by a device for producing propylene oxide by 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 industrial production methods of PO mainly include haloalcohol method, co-oxidation method and HPPO method. The production of PO produced by the co-oxidation method in the world accounts for about half of the total PO production, and the co-oxidation methods mainly include 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, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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