A system for preparing 1-amino-8-naphthol-4,6-disulfonic acid

Abstract

The invention discloses a system for preparing a 1-amino-8-naphthol-4,6-disulfonic acid. The system comprises a raw material storage tower, a first synthesis reaction tower, a second synthesis reaction tower, a filtering reaction tower, a first centrifugal reaction tower, a third synthesis reaction tower, an acidifying reaction tower, a fourth synthesis reaction tower, a decolorizing reaction tower, a dilute reaction tower, a second centrifugal reaction tower, a wastewater collection tank, a wastewater treatment system, a sulfuric acid storage tank, an ammonium hydroxide storage tank, an intermediate reaction tank, a potassium chloride solution storage tank and a finished product storage tank. The 1-amino-8-naphthol-4,6-disulfonic acid product prepared by the system is high in purity; the purity is greater than 95.3%; the H acid content is smaller than or equal to 1.5%; and the content of an insoluble matter is smaller than or equal to 0.1%.

Description

technical field [0001] The invention relates to a system for preparing 1-amino-8-naphthol-4,6-disulfonic acid, which belongs to the field of chemical industry. Background technique [0002] K acid, gamma acid, tunic acid, J acid, etc. are all downstream products of 2-naphthol. Most of their production processes involve typical chemical production processes such as sulfonation, neutralization, acidification, and ammoniation. The industrial production methods of products such as K acid, gamma acid, tunic acid, J acid are relatively single. The production of K acid is based on 2-naphthol as the main raw material, in anhydrous methanol and sulfuric acid according to a certain proportioning ratio, through a sulfonation pot, for monosulfonation, sulfonation to obtain 2-naphthol-6.8-disulfonic acid , and then react with KCl in the salting-out kettle to obtain G salt. After being ammoniated in the ammoniation kettle, the G salt and ammonia water are then subjected to acid analysis...

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Problems solved by technology

The serious impact of the current global financial crisis is that the industrial structure is unreasonable, and the industry is concentrated in labor-intensive products; technology-intensive products are obviously lagging behind developed industrial countries; the decisive role of production factors is gradually weakening; industrial energy consumption is large, output rate is low, Serious environmental pollution and increased destructiveness to natural resources; the overall scale of enterprises is relatively small, insufficient technological innovation capabilities, and backward management levels, etc.

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