Method for preparing alkyl nitrite by reaction between nitric oxide and nitric acid and alkyl alcohol

A technology of alkyl nitrite and nitric oxide, applied in the preparation of nitrite, organic chemistry, etc., can solve the problems of equipment corrosion and high cost of nitrogen oxide supply

Active Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of high nitrogen oxide supply cost and serious equipment corrosion existing in the existing synthetic gas to ethylene glycol technology. Alkyl Nitrate Method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The catalyst in the trickle bed reactor uses silicon oxide as the carrier, and the composition is: 5% nickel metal, 10% titanium metal additive, and 85% carrier. The mixed liquid (nitric acid: 1%wt, water: 4%wt, methanol: 95%wt) and the mixed gas containing NO (CO: 25%v / v, NO: 5%v / v,N 2 : 70% v / v) into the trickle bed reactor respectively, the reaction temperature is 70°C, the reaction pressure is normal pressure, and the liquid hourly space velocity is 0.5h -1 , NO and nitric acid molar ratio of 5 reacted to generate methyl nitrite, the conversion rate of nitric acid was 95.2%.

Embodiment 2

[0023] The catalyst in the trickle bed reactor is supported by activated carbon, and the composition is: 2% of metal palladium and 98% of carrier. The mixed liquid (nitric acid: 3%wt, water: 5%wt, methanol: 92%wt) and the mixed gas containing NO (CO: 30%v / v, NO: 15%v / v, CO 2 : 15% v / v, MN: 5% v / v, N 2 : 35% v / v) into the trickle bed reactor respectively, the reaction temperature is 75°C, the reaction pressure is 0.35MPa, and the liquid hourly space velocity is 1h -1 , the molar ratio of NO and nitric acid is 10 to react to generate methyl nitrite, and the conversion rate of nitric acid is 96%.

Embodiment 3

[0025] The catalyst in the trickle bed reactor is supported by activated carbon, and the composition is: 25% of metallic nickel, 1% of metallic auxiliary iron, 0.5% of metallic auxiliary titanium, and 73.5% of carrier. The mixed liquid (nitric acid: 5%wt, water: 8%wt, methanol: 87%wt) and the mixed gas containing NO (CO: 20%v / v, NO: 13%v / v, CO 2 : 12% v / v, MN: 3% v / v, N 2 : 52% v / v) into the trickle bed reactor respectively, the reaction temperature is 85 ℃, the reaction pressure is 0.6MPa, and the liquid hourly space velocity is 8h -1 , NO and nitric acid molar ratio of 3 reacted to generate methyl nitrite, the conversion rate of nitric acid was 97.3%.

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Abstract

The invention relates to a method for preparing alkyl nitrite by a reaction between nitric oxide and nitric acid and alkyl alcohol. The method comprises the step as follows: a gas-phase raw material containing nitric oxide and a liquid-phase raw material containing nitric acid and alkyl alcohol react in a trickle bed reactor so as to obtain alkyl nitrite. The method can be used for industrial production of synthesis gas preparation of glycol.

Description

technical field [0001] The invention relates to a method for preparing alkyl nitrite by reacting nitric oxide, nitric acid and alkyl alcohol. Background technique [0002] Ethylene glycol (EG) is an important basic organic raw material in petrochemical industry. It is mainly used in the production of polyester, antifreeze, lubricants, plasticizers, nonionic surfactants and explosives. It has a wide range of uses. In recent years, with the increasing market demand for downstream polyester products, the world's ethylene glycol production and demand have continued to expand, and my country is the world's largest consumer of ethylene glycol, with annual consumption reaching more than 10 million tons according to statistics , import dependence of more than 70%. [0003] At present, the production routes of ethylene glycol mainly include petroleum routes and non-petroleum routes. Traditional petroleum routes consume a large amount of crude oil to produce ethylene glycol, and the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C201/04C07C203/00
Inventor 宗弘元孙凤侠刘俊涛龚海燕
Owner CHINA PETROLEUM & CHEM CORP
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