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Recently, the new process of preparing 1-amino-8-hydroxy-3,6-naphthalenedisulfonic acid monosodium salt (H acid) by the bisamine method developed by Shenyang Chemical Industry Research Institute Co.
, Ltd.
has passed the final acceptance of the project of the Ministry of Science and Technology, and experts believe that the process has filled the domestic gap
.
Shenyang Chemical Research Institute Co.
, Ltd.
uses a new process of bisamine method to prepare H acid, after many domestic universities and factories test, the total yield is 55%~56%, the liquid chromatographic area normalization content of H acid products is increased from 97% to 99%, and the amount of wastewater producing 1 ton of H acid is reduced from 28 tons to less than 6 tons
.
Moreover, the remaining mother liquor can also be used comprehensively to produce other products
.
65% fuming sulfuric acid must be used in the traditional production of H acid, which is very dangerous
during production and transportation.
The wastewater discharged from H acid production has high salt content and contains many organic species, which is difficult to treat
.
The traditional process uses a large number of methanol as a solvent, and the boiling point of methanol is low and toxic, which increases the difficulty of explosion-proof in the workshop, and the safety of production workers is difficult to guarantee
.
The new process of the project has high yield, low cost, good quality, clean and environmental protection, solves the technical problems of low purity of products in the production process of H acid in China and the complex treatment process of "three wastes", and has the basic conditions for large-scale industrialization, can carry out industrial production, and has broad
market prospects.
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