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Synthesis method for 1,4-dyhydroxyl-9,10-anthraquinone-2-sulfonic acid

A synthesis method and a dihydroxyl technology, applied in the preparation of sulfonic acid, organic chemistry and other directions, can solve the problems of high reaction cost, many types of reagents, and complicated treatment of reaction waste liquid, etc., and achieve the effects of high quality, low cost and simple reagents

Inactive Publication Date: 2013-10-30
CHINA PHARM UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The disadvantages of the above synthesis method are: there are many kinds of reagents involved in the synthesis process, the reaction cost is relatively high, and there are cumbersome problems in the treatment of reaction waste liquid.

Method used

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  • Synthesis method for 1,4-dyhydroxyl-9,10-anthraquinone-2-sulfonic acid
  • Synthesis method for 1,4-dyhydroxyl-9,10-anthraquinone-2-sulfonic acid

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Embodiment Construction

[0021] In 20g of 20% oleum, add 3g of anhydrous sodium sulfate and 5g of 96% quinizarin, stir and dissolve at 80°C, raise the temperature to 130°C and keep it for 20 hours, cool down to 60°C, add 250ml of water, fully stir, and let it cool down naturally. to room temperature, filter with suction, wash with a small amount of water, drain, then add a large amount of water to wash, and spin dry the filtrate to obtain 1,4-dihydroxy-9,10-anthraquinone-2-sulfonic acid with a yield of 90% by weight above.

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Abstract

The invention provides a synthesis method for 1,4-dyhydroxyl-9,10-anthraquinone-2-sulfonic acid. The synthesis method comprises the following steps of: using quinizarin as a raw material, adding anhydrous sulphate and fuming sulphuric acid in a ratio, and heating to 120-140 DEG C and performing a normal-pressure reaction, wherein separation and purification for products can be realized only by water-washing. With the adoption of the synthesis method, the obtained products are high in purity and productivity; moreover, after-treatment is simple, pollution to environment is avoided, and cost is decreased.

Description

technical field [0001] The invention relates to a synthesis method of an important dye synthesis intermediate 1,4-dihydroxy-9,10-anthraquinone-2-sulfonic acid. Background technique [0002] Our laboratory has long been committed to the development and application of anthraquinone derivatization reagents, such as the new derivatization reagent 9,10-anthraquinone-2-sulfonyl chloride (ASC), which has mild reaction conditions and can be quickly, quantitatively and reproducibly Reaction; strong specificity for derivative groups, no or few side reactions; strong ultraviolet absorption and other advantages. However, the development of derivatization reagents is a gradual improvement process, and all derivatization reagents have some shortcomings, which require continuous exploration and experimentation. [0003] The 1,4-dihydroxy-9,10-anthraquinone-2-sulfonic acid described in the present invention is a very important synthetic anthraquinone dye intermediate, and is a key link in ...

Claims

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Application Information

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IPC IPC(8): C07C309/44C07C303/06
Inventor 冯芳滕宝祺李欣昕
Owner CHINA PHARM UNIV
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