Settling chamber for reclaiming residual naphthalene in synthesizing process of high-efficiency water reducing agent

Abstract

The invention relates to the field of naphthalene high-efficiency water reducing agents used in cement concrete, in particular to a settling chamber for reclaiming residual naphthalene in a synthesizing process of a high-efficiency water reducing agent. At present, the main problem is that in a production process, when melted naphthalene is sulfonated at a relatively high temperature, the naphthalene cannot be completely melted or the naphthalene is not completely reacted in a sulfonation process, so the naphthalene resource is wasted, and when discharged into the air through an escape pipe, causes pollution to atmosphere, blockage of flue gas pipelines, damage to a reclaiming kettle and the like. The invention provides the settling chamber for reclaiming the residual naphthalene in the synthesizing process of the high-efficiency water reducing agent, which can reclaim the naphthalene remaining after the naphthalene is melted and a sulfonated in the production process of the high-efficiency water reducing agent, absorb uncombined naphthalene steam in the product at the same time and increase the quality of the water reducing agent. The settling chamber can reduce the production cost. By the settling chamber, the utilization rate of raw materials is improved by about 6 percent and the utilization of environmental pollutants is realized.

Description

technical field [0001] The invention relates to the field of naphthalene-based high-efficiency water reducers used in cement concrete, and specifically relates to a settling chamber for recovering residual naphthalene during the synthesis of naphthalene-based high-efficiency water reducers. Background technique [0002] Naphthalene-based high-efficiency water reducer is currently the most widely produced and widely used high-efficiency water reducer in the domestic market. Naphthalene-based high-efficiency water reducer was invented by Kenichi Hattori of Japan. It has been used in the field of cement and concrete water reducer for nearly 40 years, and its production technology is relatively mature. Its production method is to dissolve industrial naphthalene, sulfonate it with 98% concentrated sulfuric acid, add water to hydrolyze it, add formaldehyde to polycondensate, add alkali to neutralize it, and make it into a water-soluble sodium salt of naphthalenesulfonic acid forma...

AI Technical Summary

Problems solved by technology

[0003] The main problem at present is that when naphthalene is melted and sulfonated at a higher temperature during the production process, the naphthalene cannot be completely melted, or the naphthalene is not completely reacted during the sulfonation process, resulting in waste of naphthalene resources, which are discharged into the air through the vent pipe. Pollution to the atmosphere, blockage of flue gas pipes, damage to recovery kettles, etc.

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