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Synthesizing device and process for alkyl nitrite

A technology for an alkyl nitrite and a synthesis device, which is applied in the chemical field to achieve the effects of good economy, reduced equipment investment and high product purity

Active Publication Date: 2010-09-15
WUXI HUACHENG PETROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The purpose of this invention is to provide a kind of alkyl nitrite synthetic device and technique, by nitrogen oxide and alkyl alcohol synthetic alkyl nitrite in the device of the present invention, to solve the problem that existing process device exists

Method used

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  • Synthesizing device and process for alkyl nitrite
  • Synthesizing device and process for alkyl nitrite
  • Synthesizing device and process for alkyl nitrite

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Embodiment Construction

[0031]As shown in the figure; use a 304 stainless steel tubular reactor as the oxidizer 1, use a 304 stainless steel fixed bed tubular reactor as the nitrite reactor 2, and use a 304 stainless steel Raschig ring packing The installed rectification column 3 uses a 304 stainless steel shell-and-tube heat exchanger as the vaporizer 4, and a 304 stainless steel shell-and-tube heat exchanger as the heat exchanger 5 (where circulating water or frozen brine is used as the heat exchange medium) , As the alkyl alcohol, methanol is used. ① The oxidizer 1 and the heat exchanger 4 are respectively connected to the inlet of the tube side of the reactor 2 through at least one pipeline, so as to send nitrogen oxides and alkyl alcohol gas to the tube side of the reactor for reaction. ②The lower part of the rectification tower 3 is connected to the shell-side inlet and outlet of the reactor 2 through two pipelines, thereby realizing the removal of the tube-side reaction heat through the heatin...

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Abstract

The invention discloses a synthesizing device and a synthesizing process for alkyl nitrite, and belongs to the technical field of chemistry. An oxidizer is provided with a plurality of inlets for changing a connection mode with other components; and a reactor, a rectifying tower, a cooling device vaporizer and a heat exchanger are arranged to be respectively independent operation units, the independent operation units are connected with the vaporizer through a reactor tube stroke, and connected with the rectifying tower through the cooling device vaporizer and a heat exchanger liquid phase pipeline, so that the procedures of reacting, rectifying, separating and cooling the product can be carried out independently. The process comprises the steps of: (1), gasification of alkanol; (2), oxidation; (3), generation of the alkyl nitrite; and (4), separation of a by-product. The synthesizing device and the synthesizing process realize the removal and utilization of the reaction heat and gasification of the alkanol by using the heat of the reaction product. The synthesizing device and the synthesizing process for the alkyl nitrite have the advantages of high operation stability, mild reaction condition, high raw material conversion ratio, high selectivity of the product, high yield, suitability for large-scale continuous production of the alkyl nitrite and the like.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and in particular relates to a device and a process for efficiently and stably producing alkyl nitrite from nitrogen oxides and alkyl alcohols. [0002] The alkyl nitrite prepared by the invention can be used in the production of dialkyl oxalate and dialkyl carbonate. Background technique [0003] Alkyl nitrite is generally a colorless or light yellow liquid, and is an important organic chemical intermediate, especially in the non-petroleum route to ethylene glycol. In addition, it can also be widely used in industry as a fuel additive, vinyl compound stabilizer, and antispasmodic agent. [0004] At present, the preparation process of alkyl nitrite in industry generally adopts the nitrogen oxide method, and the alkyl nitrite is prepared by reacting nitrogen oxide with alkyl alcohol. Because the reaction between nitrogen oxides and alkyl alcohols is exothermic and easily forms reaction by-prod...

Claims

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Application Information

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IPC IPC(8): C07C203/00C07C201/04
Inventor 季晓龙
Owner WUXI HUACHENG PETROCHEM EQUIP
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