Method for preparing C1-C4 alkyl nitrites

A technology of alkyl nitrite and alkanol, which is applied in the preparation of nitrite, chemical instruments and methods, molecular sieve catalyst, etc., can solve the problems of high content of nitric acid by side reaction product and low selectivity of alkyl nitrite.
CN101993374AInactive Publication Date: 2011-03-30SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
Publication Date
2011-03-30
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to a method for preparing C1-C4 alkyl nitrites, which mainly solves the technical problems of low target product selectivity and high content of nitric acid as side products in the prior art. The method comprises the following steps of: a, enabling nitric oxide and oxygen to firstly enter a reactor I, reacting to generate an effluent I containing NO2 and unreacted NO; b, enabling the effluent I and C1-C4 alkanols to enter a reactor II, reacting to generate an effluent II containing the nitrites; and c, obtaining the nitrites after separating the effluent II containing the nitrites, enabling the nitrites subjected to the dryness to enter a subsequent reaction unit for use, wherein the nitric oxide contains the NO, and the mol number of the NO is more than that of the NO2, the mol ratio of the NO to the oxygen in the nitric oxide is 4-25:1. The invention better solves the problems, and can be used in the industrialized production for increasing the yield of C1-C4 alkyl nitrites.
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Description

technical field

[0001] The present invention relates to a kind of preparation C 1 ~C 4 Process for alkyl nitrites, especially with respect to the C required for CO coupling to produce oxalates 1 ~C 4 Process for the production of alkyl nitrites. Background technique

[0002] Oxalate is an important organic chemical raw material, which is widely used in fine chemicals to produce various dyes, medicines, important solvents, extractants and various intermediates. Entering the 21st century, oxalate has attracted international attention as a biodegradable and environmentally friendly engineering plastic monomer. In addition, oxalic acid can be obtained by normal pressure hydrolysis of oxalate, and high-quality slow-acting chemical fertilizer oxalamide can be obtained by normal pressure ammonolysis. Oxalate esters can also be used as solvents to produce pharmaceutical and dye intermediates, etc., such as various condensation reactions with fatty acid esters, cyclohexyl acetop...

Claims

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