Preparation process of bromamine acid

The invention discloses a preparation process of bromamine acid. The preparation process comprises the following steps: adding o-dichlorobenzene, 1-aminoanthraquinone and chlorosulfonic acid into a sulfonation kettle for sulfonation reaction; a plurality of layers of stirring mechanisms are arranged on the inner circumferential wall of the sulfonation kettle; in the sulfonation reaction process, reactants in the sulfonation kettle are subjected to multi-layer radial reciprocating stirring through the multi-layer stirring mechanism, so that the reactants in the sulfonation reaction are fully mixed. 本发明公开了一种溴氨酸的制备工艺，包括在磺化釜中加入邻二氯苯、1-氨基蒽醌、氯磺酸进行磺化反应的步骤；在磺化釜的内周壁上设置多层搅动机构；在磺化反应过程中，通过多层搅动机构对磺化釜中的反应物进行多层径向往复搅动，使磺化反应的反应物充分混合。