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Production process of No gas for synthesizing oxalate

A production method and technology of oxalate, applied in the field of NO gas source, can solve the problems that have not been seen or seen, and achieve good economic and social benefits, and reduce production costs.

Active Publication Date: 2006-05-17
TONGLIAO GOLD COAL CHEM
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Problems solved by technology

But, so far, do not see the report that the nitrogen oxide that useful ammonia oxidation takes place directly as the NO gas source of synthetic oxalic acid ester, also do not see that there is the direct use nitrogen oxide in the nitric acid industrial tail gas to be used as synthetic oxalic acid Report on NO Gas Source of Esters

Method used

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  • Production process of No gas for synthesizing oxalate

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specific Embodiment approach

[0018] The specific embodiment of the present invention is now described in detail in conjunction with the schematic diagram of the process flow: air and ammonia are directly sent into the ammoxidation furnace A for oxidation reaction, and the nitrogen oxides generated are cooled by the heat exchanger B and then directly enter the esterification reaction tower C, react with the alcohols that are sent in, and generate nitrite; Alcohol) for oxidative esterification, so that all nitrogen oxides react to form nitrite and a small amount of nitric acid; then, let the gas pass through the compressor E, the pressure P is 0.1MPa ~ 10MPa, and then enter the alcohol absorption tower F, let the alcohol Absorb the generated nitrite, and then enter the double-pass condensation tower G, under the conditions of -20 ° C ~ 100 ° C and P = 0.1 ~ 10 MPa, condense and liquefy the nitrite and alcohols in the non-condensable gas, and combine with N 2 , Ar and other non-condensable gas separation. T...

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Abstract

The production process of NO gas for synthesizing oxalate belongs to the field of chemical and environment protection technology. The production process includes ammoxidation of air to produce NOx as the NO gas for synthesizing oxalate, or utilizing the NOx in nitric acid producing tail gas as the NO gas for synthesizing oxalate, absorbing nitrite with alcohols and compression and condensation to recover alcohols and nitrite from the tail gas. The production process has liquid ammonia or gaseous ammonia of concentration 1-30 vol%, oxygen of concentration 1-30 vol%, alcohol concentration of 50-100 wt%, pressure of 0.1-10 MPa, and condensation temperature of ¿C20 to 100 deg.c. The present invention has high economic utility and social utility.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and environmental protection, and relates to a new method of using nitrogen oxide, a product of ammonia oxidation, as a NO gas source for synthesizing oxalate. Background technique [0002] It is well known that CO gas-phase catalyzed synthesis of oxalate is a contemporary C 1 The most promising major new process and new technology developed by chemical research and development. Its successful research and development can change the existing synthetic raw material routes and production processes for the synthesis of important chemical raw materials such as oxalate, oxalic acid, and ethylene glycol. Especially It can realize the strategic goal of "using coal or natural gas instead of petroleum ethylene and two-step indirect synthesis of ethylene glycol", which has great strategic significance and can achieve good economic and social benefits. [0003] In the reaction (see formula (1)) of...

Claims

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Application Information

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IPC IPC(8): C01B21/20
Inventor 陈贻盾
Owner TONGLIAO GOLD COAL CHEM
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