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Method for producing sodium sulfide by suspending sodium sulfate

A sodium sulfate and sodium sulfide technology, applied in the direction of alkali metal sulfide/polysulfide, can solve the problems of low production efficiency and long time

Pending Publication Date: 2021-12-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the reaction time is longer and the production efficiency is lower

Method used

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  • Method for producing sodium sulfide by suspending sodium sulfate
  • Method for producing sodium sulfide by suspending sodium sulfate

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with specific examples. Add grain control agent and dispersant to sodium sulfate saturated solution, concentrate, crystallize and dry to obtain superfine sodium sulfate powder; add catalyst to sodium sulfate powder and mix evenly, then add to suspension reaction furnace to react to obtain product Mixture, the product mixture is sorted to obtain sodium sulfide. The following table shows the formulations of grain control agent, dispersant and catalyst, see Table 1. See Table 2 for the atmosphere modifier, temperature, reduction time and product conversion rate of the calciner.

[0018] Table 1

[0019]

[0020] Table 2

[0021]

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Abstract

The invention discloses a method for producing sodium sulfide by suspending sodium sulfate. The method comprises the following steps: adding a crystal grain regulating agent and a dispersing agent into a saturated sodium sulfate solution, and carrying out concentrating, crystallizing and drying to obtain superfine sodium sulfate powder; and adding a catalyst into the superfine sodium sulfate powder, carrying out uniform mixing, adding the formed mixture into a suspension reaction furnace, conducting reacting to obtain a product mixture, and sorting the product mixture to obtain sodium sulfide. Compared with the prior art, the method of the invention has the characteristics of high production efficiency, simple process and low production cost.

Description

technical field [0001] The present invention relates to the field of inorganic salt chemical industry, in particular to a method for efficiently reducing sodium sulfate to produce sodium sulfide. Background technique [0002] High-temperature reduction of sodium sulfate by pulverized coal is currently the main method for domestic production of sodium sulfide. It uses ordinary high-ash coal to reduce sodium sulfate at high temperature (mostly 90% weathered nitric acid) to obtain sodium sulfide "black ash", and then through leaching and sedimentation , washing, evaporation and a series of follow-up treatments to obtain a product with a sodium sulfide content of 60% [Zhao Xiuping, Jing Xiaobing, Su Gang. Research on the preparation of sodium sulfide by one-step method of reducing sodium sulfate from ultra-low ash pure coal[J]. Salt Industry and Chemical Industry , 2015, 44(12): 36-40]. The process is complicated to produce and the energy consumption of the product is high. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/22
CPCC01B17/22
Inventor 马小玲谭宏斌王进明董发勤郑召邓浩杨飞华施淑颖吴涛范晓玲邓秋林王进王军霞李芳贺小春
Owner SOUTHWEAT UNIV OF SCI & TECH
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