Method for producing C1-C4 alkyl nitrites

Abstract

The invention relates to a method for producing C1-C4 alkyl nitrites, which mainly solves the technical problems of low objective product selectivity and high side reaction product nitric acid content in the prior art. The method comprises the following steps of: a) delivering a nitrogen oxide raw material generated by oxidation of ammonia and air and a first stream of C1-C4 alkanol into a reactor I to generate an effluent I containing C1-C4 alkyl nitrites, and separating the effluent to obtain a gas effluent II and a liquid effluent III; b) delivering the gas effluent II and a first stream of oxygen into a reactor II to contact with an aluminosilicate catalyst to generate an effluent IV; c) delivering a second stream of C1-C4 alkanol and the effluent IV into a reactor III to generate an effluent V by reaction, and separating the effluent to obtain a non-condensed gas effluent VI and an effluent VII containing C1-C4 alkyl nitrites; and d) drying the effluent VII, and then delivering the dried effluent VII to a subsequent reaction unit for use. According to the technical scheme, the method well solves the problems, and can be used for industrial production of the increased C1-C4 alkyl nitrites.

Description

technical field

[0001] The present invention relates to a kind of production C 1 ~C 4 Alkyl nitrite methods, especially with regard to the C 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 the fine chemical industry to produce various dyes, medicines, important solvents, extractants and various intermediates. In the 21st century, oxalate, as a degradable and environmentally friendly engineering plastic monomer, has received extensive international attention. In addition, oxalic acid can be obtained by normal pressure hydrolysis of oxalate, and oxalamide can be obtained by normal pressure ammonia solution. Oxalate can also be used as a solvent to produce pharmaceutical and dye intermediates, etc., such as various condensation reactions with fatty acid esters, cyclohexylacetophenone, amino alcohols, and many heterocyclic compounds. It can also synthesize thym...