Method for neutralizing sulphur acidity by using refined lime

A technology of lime and sulfur, applied in the preparation/purification of sulfur, etc., can solve the problems of high price of soda ash, increase production cost, difficult to filter and separate, etc., and achieve the effect of reducing production cost, facilitating filtering and removing, and low price

Inactive Publication Date: 2013-01-23
TIANJIN BODA SULFURIC ACID IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that this kind method exists is: soda ash price is relatively high, increases production cost; Generate sodium sulfate (Na 2 SO 4 ), which are soluble sulfates, which are difficult to separate by filtration in molten liquid sulfur

Method used

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  • Method for neutralizing sulphur acidity by using refined lime
  • Method for neutralizing sulphur acidity by using refined lime
  • Method for neutralizing sulphur acidity by using refined lime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: one ton of sulfur, through laboratory acid-base titration assay, its acidity value is 0.030%, through following formula calculation,

[0012]

[0013] Add 0.19kg of refined lime, stir well, filter to remove the residue, and then proceed to the next step of production.

Embodiment 2

[0014] Example 2: One ton of sulfur, tested by acid-base titration in the laboratory, has an acidity value of 0.063%. After calculation, add 0.4 kg of lime, fully stir, filter to remove the residue and proceed to the next step of production.

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Abstract

The invention provides a method for neutralizing sulphur acidity by using refined lime, belonging to the field of sulfuric acid production processes. According to the technical scheme, the method comprises the steps of: adding the refined lime in melted liquid sulphur, stirring for reacting to generate micro-soluble calcium sulfate, and removing the calcium sulfate through a filter net. The method has the beneficial effects that the price of the refined lime is lower than that of sodium carbonate, thus the production cost is lowered for enterprises, and a neutralizing effect same as that of a method based on sodium carbonate is achieved, the production is ensured; and insoluble calcium sulfate is generated after the refined lime is used and insoluble calcium sulfate can be filtered and removed conveniently, thus the method is more convenient and rapid.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid production, in particular to a method for neutralizing the acidity of sulfuric acid with refined lime. Background technique [0002] In the production process of sulfuric acid, the melting of solid sulfur is an important step. In the process of melting sulfur, hydrogen ions will be generated in the sulfur, which has a certain acidity and will cause serious corrosion to the sulfur melting tank, filter tank, pump and pipeline. Therefore, it is necessary to neutralize it. Adding soda ash (Na 2 CO 3 ) method to neutralize the acidity in the sulfur. The problem that this kind method exists is: soda ash price is relatively high, increases production cost; Generate sodium sulfate (Na 2 SO 4 ), which are soluble sulfates, which are difficult to separate by filtration in molten liquid sulfur. Contents of the invention [0003] The invention provides a method for neutralizing sulfur acidity wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/02
Inventor 王威张恒昌
Owner TIANJIN BODA SULFURIC ACID IND
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