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The production method of methyl nitrite

A technology of methyl nitrite and a production method, which is applied in the production field of methyl nitrite, can solve the problems of high nitrogen oxide supply cost, equipment corrosion, etc., so as to improve gas-liquid distribution, ensure conversion rate, and improve reaction efficiency Effect

Active Publication Date: 2018-07-17
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, and a new production method of methyl nitrite is provided

Method used

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  • The production method of methyl nitrite
  • The production method of methyl nitrite
  • The production method of methyl nitrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A trickle bed reactor as shown in Fig. 1 is used. Wherein, the upper end of the gas-liquid distributor short pipe 11 extends 50 mm above the distribution plate 6, and the lower end extends 500 mm below the distribution plate 6, and the ratio of the diameter d of the small hole 12 to the inner diameter D of the liquid channel pipe 7 is 0.015:1.0 , the ratio of the area S1 of all small holes 12 to the area S2 of the cross-section in the liquid passage pipe 7 is 1.01: 1.0; the opening ratio of the gas passage pipe 8 on the distribution plate 6 is 15%, and the liquid passage pipe 7 is on the distribution plate 6 on the opening rate of 20%.

[0039] The catalyst in the reactor uses active carbon as a carrier, and the catalyst is composed of: 12% nickel metal, 3% iron as a metal additive, 3% titanium as a metal additive, and the balance as a carrier. The mixed liquid (nitric acid: 1%wt, methanol: 99%wt) and the mixed gas (CO: 25%v / v, NO: 10%v / v, CO 2 : 15% v / v, MN: 5% v / v, ...

Embodiment 2

[0041] A trickle bed reactor as shown in Fig. 1 is used. Wherein, the upper end of the gas-liquid distributor short pipe 11 extends 25 mm above the distribution plate 6, and the lower end extends 800 mm below the distribution plate 6, and the ratio of the diameter d of the small hole 12 to the inner diameter D of the liquid channel pipe 7 is 0.011:1.0 , the ratio of the area S1 of all small holes 12 to the area S2 of the cross-section in the liquid passage pipe 7 is 0.95:1.0; the opening ratio of the gas passage pipe 8 on the distribution plate 6 is 10%, and the liquid passage pipe 7 is on the distribution plate 6 on the opening rate of 15%.

[0042] The catalyst in the trickle bed reactor uses silicon oxide as a carrier, and the catalyst composition is: 5% metallic nickel, 10% titanium as a metal additive, and the rest as carrier. The mixed liquid (nitric acid: 15%wt, water: 30%wt, methanol: 55%wt) and the mixed gas containing NO (CO: 30%v / v, NO: 15%v / v, CO 2 : 15% v / v, M...

Embodiment 3

[0044] A trickle bed reactor as shown in Fig. 1 is used. Wherein, the upper end of the gas-liquid distributor short pipe 11 extends 80 mm above the distribution plate 6, and the lower end extends 650 mm below the distribution plate 6, and the ratio of the diameter d of the small hole 12 to the inner diameter D of the liquid channel pipe 7 is 0.15:1.0 , the ratio of the area S1 of all small holes 12 to the area S2 of the cross-section in the liquid passage pipe 7 is 1.1: 1.0; the opening ratio of the gas passage pipe 8 on the distribution plate 6 is 20%, and the liquid passage pipe 7 is on the distribution plate 6 on the opening rate of 30%.

[0045] The catalyst in the trickle bed reactor is supported by activated carbon, and the catalyst is composed of: 25% nickel metal, 1% iron as a metal additive, 0.5% titanium as a metal additive, and the balance as a carrier. The mixed liquid (nitric acid: 5%wt, water: 8%wt, methanol: 87%wt) and the mixed gas containing NO (CO: 20%v / v, N...

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Abstract

The invention relates to a production method of methyl nitrite. Problems, such as high supply cost of nitric oxide and severe equipment corrosion, which exist in the present synthesis gas technology for preparation of glycol, are mainly solved. According to the production method, a gas-phase raw material containing nitric oxide and a liquid-phase raw material containing nitric acid and methanol react in a trickle bed reactor so as to obtain methyl nitrite. By the technical scheme, the above problems are greatly solved. The production method can be used for industrial production of methyl nitrite in the synthesis gas technology for preparation of glycol.

Description

technical field [0001] The present invention relates to a kind of production method of methyl nitrite. 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 economic benefits of this production pro...

Claims

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Application Information

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