Preparation method for catalyst for preparing chloroethylene via ethane oxychlorination

A technology for producing vinyl chloride and catalysts by oxychlorination of ethane, which is applied in the field of preparation of catalysts for producing vinyl chloride by oxychlorination of ethane, can solve problems such as affecting the service life of catalysts, reducing catalyst activity, and loss of Fe ions, so as to reduce energy consumption. Consumption, good catalytic activity, low cost effect

Inactive Publication Date: 2013-04-24
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology provides an improved type of reactor for producing vinylchloride from methanol (CH3OH). It uses special types of catalysis called acetoxysorhodium(AO) or platinum-aluminum alloy which are easy to prepare at very specific temperatures (400-5000C), reducing power usage compared to traditional methods like dichloromethanesulfonate/molybdenum sulfite processes. These techniques result in higher efficiency rates than current technologies while also improving product quality.

Problems solved by technology

Technically speaking, there exist various methods known for making certain types of organics called plasticizers from alcohols obtained via hydrochlorination processes. However, these existing techniques suffer drawbacks including poor efficiency due to long cycle times required, environmental concerns caused by waste streams generated after combustion, and increased costs associated with purchasing expensive reactors.

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  • Preparation method for catalyst for preparing chloroethylene via ethane oxychlorination

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Embodiment 1

[0015] Embodiment 1: 1.19g tin powder is dissolved in 50ml dilute cold nitric acid and is made into tin nitrate solution, takes by weighing 4.34g cerium nitrate hexahydrate, 0.5g potassium nitrate, 4.04g ferric nitrate nonahydrate, 12.5g citric acid monohydrate, Add 0.3g of polyethylene glycol 2000 and 5.2g of titanium dioxide into the tin nitrate solution, then add 30ml of deionized water, stir and evaporate the water in a water bath at 80°C, dry at 100°C for 14h, then bake at 500°C for 3h, and then bake at 700°C for 3h A catalyst for producing vinyl chloride by oxychlorination of ethane is obtained.

Embodiment 2

[0016] Embodiment 2: 0.59g tin powder is dissolved in 50ml dilute cold nitric acid and is made into tin nitrate solution, takes by weighing 2.17g cerium nitrate hexahydrate, 0.5g potassium nitrate, 2.02g ferric nitrate nonahydrate, 12.5g citric acid monohydrate, Add 0.3g of polyethylene glycol 2000 and 6.4g of titanium dioxide into the tin nitrate solution, then add 30ml of deionized water, stir and evaporate the water in a water bath at 80°C, dry at 100°C for 14h, then bake at 500°C for 3h, and then bake at 700°C for 3h A catalyst for producing vinyl chloride by oxychlorination of ethane is obtained.

Embodiment 3

[0017] Embodiment 3: 0.59g tin powder is dissolved in 50ml dilute cold nitric acid and is made into tin nitrate solution, takes by weighing 4.34g cerium nitrate hexahydrate, 0.5g potassium nitrate, 2.78g ferrous sulfate heptahydrate, 12.5g citric acid monohydrate , 0.3g of polyethylene glycol 2000 and 5.2g of titanium dioxide were added to the tin nitrate solution, and then 30ml of deionized water was added, stirred and evaporated in a water bath at 80°C, dried at 100°C for 14h, then calcined at 500°C for 3h, and then calcined at 700°C 3h to obtain a catalyst for the production of vinyl chloride by oxychlorination of ethane.

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Abstract

The technical problem to be solved by the invention is to provide a preparation method for a catalyst for preparing chloroethylene via ethane oxychlorination. The catalyst contains rare-earth elements, alkali metal elements, iron element, tin element and titanium dioxide, and is applied to a fixed bed reactor; the preparation method for the catalyst is simple in process, low in reaction temperature, and reduced in energy consumption; air is used as a raw material gas, so that the cost is low; and the prepared catalyst has good catalytic activity while being applied to a reaction for preparing chloroethylene via ethane oxychlorination, the conversion rate of ethane is 80-100%, and the selectivity of chloroethylene is 40-68%.

Description

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Claims

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Application Information

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Owner INNER MONGOLIA UNIVERSITY
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