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Method for preparing low-iror anhydrous sodium sulfide by one-step reduction of Glauber salt from coke oven gas

A technology of anhydrous sodium sulfide and coke oven gas, which is applied in the direction of alkali metal sulfide/polysulfide, can solve the problems of serious environmental pollution and high energy consumption, and achieve the effect of saving energy and overcoming serious pollution and high energy consumption

Inactive Publication Date: 2006-10-25
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method that can not only effectively overcome the serious environmental pollution and high energy consumption defects of the traditional production of sodium sulfide with coal and Glauber’s salt as raw materials, but also can make full use of the waste gas produced by coal coke enterprises—coke oven Coal gas, as one of the raw materials for preparing industrial sodium sulfide, is a method for preparing sodium sulfide by reducing Glauber's salt in one step by gas reduction method

Method used

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  • Method for preparing low-iror anhydrous sodium sulfide by one-step reduction of Glauber salt from coke oven gas

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Experimental program
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Effect test

Embodiment 1

[0012] Embodiment 1: the preparation method of coke oven gas one-step reduction Glauber's salt system low-iron anhydrous sodium sulfide is based on the production of 1 ton of low-iron anhydrous sodium sulfide, and the preparation method includes the following steps:

[0013] 1) after getting 1800 kilograms of industrial anhydrous sodium sulfates and 9 kilograms of vanadium pentoxides to mix, add from the tower top through the feeder, the sodium sulfide generated after the reaction is discharged from the discharge at the bottom of the fluidized bed;

[0014] 2) 1800 standard cubic meters of coke oven gas is pressurized to 0.03Mpa by the blower, preheated to 160°C in the preheater, and then heated to the reaction temperature of 540°C in the heating furnace, and then sent to the bottom of the fluidized bed reactor, Inside the chemical bed reactor, coke oven gas reacts with sodium sulfate to generate sodium sulfide—that is, the prepared sodium sulfide meets the standard of Class 3 ...

Embodiment 2

[0016] Embodiment 2: the preparation method of coke oven gas one-step reduction Glauber's salt system low-iron anhydrous sodium sulfide is based on the production of 1000 kilograms of low-iron anhydrous sodium sulfide, and the preparation method includes the following steps:

[0017] 1) After getting 1800 kilograms of industrial anhydrous sodium sulfate and 18 kilograms of ferric oxide and mixing, add from the top of the tower through a feeder, and the sodium sulfide generated after the reaction is discharged from the bottom of the fluidized bed;

[0018] 2) 2,500 standard cubic meters of coke oven gas is pressurized to 0.05Mpa by a blower, preheated to 200°C in a preheater, and then heated to a reaction temperature of 640°C in a heating furnace, and then sent to the bottom of a fluidized bed reactor. Inside the chemical bed reactor, coke oven gas reacts with sodium sulfate to generate sodium sulfide—that is, the prepared sodium sulfide meets the standard of Class 3 low-iron an...

Embodiment 3

[0020] Embodiment 3: the preparation method of coke oven gas one-step reduction Glauber's salt system low-iron anhydrous sodium sulfide is based on the production of 1000 kilograms of low-iron anhydrous sodium sulfide, and the preparation method includes the following steps:

[0021] 1) After getting 1800 kilograms of industrial anhydrous sodium sulfate and 11 kilograms of ferric oxide to mix, add from tower top through feeder, the sodium sulfide that generates after reaction is discharged from fluidized bed bottom discharge;

[0022] 2) 2,200 standard cubic meters of coke oven gas is pressurized to 0.04Mpa by a blower, preheated to 180°C in a preheater, and then heated to a reaction temperature of 590°C in a heating furnace, and then sent to the bottom of a fluidized bed reactor. Inside the chemical bed reactor, coke oven gas reacts with sodium sulfate to generate sodium sulfide—that is, the prepared sodium sulfide meets the standard of Class 3 low-iron anhydrous industrial so...

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Abstract

The invention discloses a method for preparing low iron anhydrous sodium sulfide by one-step Glauber's salt reduction with coke oven gas, using waste gas of a coke enterprise-coke oven gas as one of the raw materials, and adopting gas reduction to make one-step Glauber's salt reduction to prepare sodium sulfide; further determining an industrial method for producing 3 kinds of low iron anhydrous sodium sulfides in GB10500-2000 with coke oven gas and Glauber's salt as raw materials; determining a low temperature iron-free catalyst whose conversion ratio can be above 90% at lower temperature and solving the difficulty in coking and sintering; not using the other energy sources so as to save energy sources.

Description

Technical field: [0001] The invention relates to a method for preparing low-iron anhydrous sodium sulfide, in particular to a method for preparing low-iron anhydrous sodium sulfide by reducing mirabilite with coke oven gas in one step. Background technique: [0002] Sodium sulfide, also known as alkali sulfide, is an important inorganic chemical product. According to the national standard GB10500-2000, it is a class 1 and class 2 product, and is mainly used in the manufacture of dyes, sulfides, ore flotation agents, leather depilatory agents, Fumigant etc. Type 3 low-iron, anhydrous products are mainly used in the production of some fine chemical products such as dye intermediates, pharmaceuticals and anisole. Low-iron, anhydrous products with a content of more than 60% have been developed in recent years due to the demand for fine chemical products. [0003] At present, the traditional production process of sodium sulfide is to calcine coal powder and Glauber's salt, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/24
Inventor 吉仁塔布
Owner INNER MONGOLIA UNIV OF TECH
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