1-aminoanthraquinone preparation nitrification device and nitrification process method

Abstract

The invention discloses a 1-aminoanthraquinone preparation nitrification device, comprising an anthraquinone solution reactor, a first volume pump, a concentrated nitric acid solution reactor, a second volume pump concentrated sulfuric acid solution reactor, a third volume pump, a magnet stirrer, and a spiral pipe heat exchanger. The anthraquinone solution reactor is connected to the first volumepump by means of a pipe I; the concentrated nitric acid solution reactor is connected to the second volume pump by means of a pipe II; the concentrated sulfuric acid solution reactor is connected to the third volume pump by means of a pipe III; and the magnet stirrer is connected to the spiral pipe heat exchanger by means of a pipe IV. The invention also discloses a 1-aminoanthraquinone preparation nitrification process method. The invention has the advantages of increasing an initial reaction speed; continuously feeding; short reaction time, small total amount of materials which participatesthe reaction. According to the invention, when cutting power, cutting off water, or stopping stirring and the like, because the total amount of reaction materials in a reaction device is smaller, therisk of explosion does not exist; and a pipeline reactor adopts a pipeline process with a small device and large outputs.

Description

technical field [0001] The invention relates to a pharmaceutical chemical intermediate, in particular to a nitration device and a nitration process method for preparing 1-aminoanthraquinone. Background technique [0002] 1-Aminoanthraquinone (C14H9NO2) is a red to brown crystalline powder, mainly used in the manufacture of dye intermediate raw materials. Anthraquinone dyes are the second largest category of dyes next to azo dyes. 1-Aminoanthraquinone is an important intermediate for the synthesis of anthraquinone dyes. The main raw material of pyrazolantrone is not only used in the production of disperse, reduced, acidic, and reactive dyes, but also in the production of inks, coatings, and polymer pigments, and can be used as a photosensitizer for photodegradable polyester. In recent years, it has also been used Used as a liquid crystal dye. Therefore, 1-aminoanthraquinone occupies an extremely important position in the dye industry. [0003] In recent years, due to envir...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the nitration process of the traditional process for preparing 1-aminoanthraquinone, the nitration reaction is a dangerous process, and the nitration temperature and the nitration reaction speed should be strictly controlled in the nitration process. When elements such as water and reaction equipment stirring fail, when the heat energy generated by the reaction cannot be removed quickly, the temperature rises sharply, resulting in the risk of explosion, and the current 1-aminoanthraquinone production device is large in size, and there are safety hazards in the nitrification reaction process. The problem of uncontrollable risk

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