System and process for dehydrating and drying isooctyl nitrate crude product

Abstract

The invention belongs to the technical field of producing petrochemicals such as nitrates, and specifically relates to a system and a process for dehydrating and drying an isooctyl nitrate crude product. The system and the process are to overcome the defect of low production efficiency in the prior art and adopt the following technical scheme: the system for drying the isooctyl nitrate crude product comprises a crude product tank, a rough-removing component, a fine-removing component and a product tank which are connected with a pump in turn, wherein the rough-removing component comprises two silica gel rough-removing devices connected in parallel, and the fine-removing component comprises one molecular sieve fine-removing device. The system and the process have the following advantages that: 1, the processing and the operation are simple and convenient; 2, the water content can be conveniently adjusted and controlled in real time as requested; 3, the used adsorbents are particles and have no problems of a sodium sulfate adsorbent which is easy to agglomerate after absorbing water and then increases the operational complexity; 4, the system and the process are stable and reliable; and 5, the production efficiency is greatly improved.

Description

technical field

[0001] The invention belongs to the technical field of production of petrochemical product nitrate, and in particular relates to a dehydration and drying system and process for a crude product of isooctyl nitrate. Background technique

[0002] Isooctyl nitrate is an excellent cetane number improver for diesel oil. In industry, the method of nitration of isooctyl alcohol is generally used for production. In the method, concentrated sulfuric acid is used as a catalyst, nitric acid and isooctyl alcohol are directly nitrated in a reactor, and the product isooctyl nitrate is obtained through processes such as separation, alkali washing, water washing, drying and dehydration.

[0003] At present, vacuum drying and physical adsorption are mainly used in industry for dehydration. In CN1031525A, a synthesis process is introduced. The drying and dehydration section mainly adopts the method of vacuum drying for dehydration. The disadvantage is that special vacuum equi...

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