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Method for producing ordinary zinc carbonate and caustic soda by using sodium hydrosulfite filtration residues

A technology of zinc carbonate and sodium hydrosulfite, which is applied in the direction of chemical instruments and methods, zinc compounds, alkali metal compounds, etc., can solve the problems of inability to consume zinc powder waste residue, single use, etc., achieve less by-products, simple operation, and is suitable for promotion Applied effect

Inactive Publication Date: 2011-06-15
汪晋强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its use is relatively single, and it is far from being able to consume the increasing zinc powder waste slag along with the increase in the production of sodium hydrosulfite.

Method used

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  • Method for producing ordinary zinc carbonate and caustic soda by using sodium hydrosulfite filtration residues
  • Method for producing ordinary zinc carbonate and caustic soda by using sodium hydrosulfite filtration residues
  • Method for producing ordinary zinc carbonate and caustic soda by using sodium hydrosulfite filtration residues

Examples

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Embodiment 1

[0020] refer to figure 1 , a method for producing common zinc carbonate co-production caustic soda with sodium hydrosulfate filter residue, comprising the following specific steps: weighing 495kg sodium hydrosulfite, converting the content of zinc hydroxide in the filter residue of sodium hydrosulfite to be 297kg, and pulverizing the sodium hydrosulfate filter residue, disposing Become suspension liquid, configure sodium carbonate solution simultaneously; Suspension liquid and sodium carbonate solution are 1: 1.07 drop into in the first anti-corrosion reactor (1) by the mass ratio of zinc hydroxide and sodium carbonate pure substance, react to obtain A mixture containing zinc carbonate precipitation and sodium hydroxide; the mixture of zinc carbonate precipitation and sodium hydroxide is filtered through a filter (2) to obtain a zinc carbonate filter cake and sodium hydroxide filtrate; the zinc carbonate filter cake is passed through a washing machine (3) Washing, drier (4) dr...

Embodiment 2

[0022] refer to figure 1 , a method for producing common zinc carbonate co-production caustic soda with sodium hydrosulfate filter residue, comprising the following specific steps: weighing 495kg sodium hydrosulfite, converting the content of zinc hydroxide in the filter residue of sodium hydrosulfite to be 297kg, and pulverizing the sodium hydrosulfate filter residue, disposing Become suspension liquid, configure sodium carbonate solution simultaneously; Suspension liquid and sodium carbonate solution are 1: 1.27 drop into in the first anti-corrosion reactor (1) by the mass ratio of zinc hydroxide and sodium carbonate pure substance, react to obtain A mixture containing zinc carbonate precipitation and sodium hydroxide; the mixture of zinc carbonate precipitation and sodium hydroxide is filtered through a filter (2) to obtain a zinc carbonate filter cake and sodium hydroxide filtrate; the zinc carbonate filter cake is passed through a washing machine (3) Washing, drier (4) dr...

Embodiment 3

[0024] refer to figure 1 , a method for producing common zinc carbonate co-production caustic soda with sodium hydrosulfate filter residue, comprising the following specific steps: weighing 495kg sodium hydrosulfite, converting the content of zinc hydroxide in the filter residue of sodium hydrosulfite to be 297kg, and pulverizing the sodium hydrosulfate filter residue, disposing Become suspension liquid, configure sodium carbonate solution simultaneously; Suspension liquid and sodium carbonate solution are 1: 0.87 drop into in the first anti-corrosion reactor (1) by the mass ratio of zinc hydroxide and sodium carbonate pure substance, react to obtain A mixture containing zinc carbonate precipitation and sodium hydroxide; the mixture of zinc carbonate precipitation and sodium hydroxide is filtered through a filter (2) to obtain a zinc carbonate filter cake and sodium hydroxide filtrate; the zinc carbonate filter cake is passed through a washing machine (3) Washing, drier (4) dr...

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Abstract

The invention provides a method for producing ordinary zinc carbonate and caustic soda by using sodium hydrosulfite filtration residues, which comprises the following steps of: crushing the sodium hydrosulfite filtration residues and preparing suspension; reacting the suspension with solution of calcium carbonate according to the pure substance mass ratio of zinc hydroxide to the calcium carbonate of 1:0.87-1.27 to obtain a mixture containing zinc carbonate precipitates and sodium hydroxide; filtering the mixture to obtain a zinc carbonate filter cake and sodium hydroxide filtrate; performing washing, drying and crushing on the zinc carbonate filter cake to obtain zinc carbonate powder products; and distilling the sodium hydroxide filtrate, discharging and cooling the distilled sodium hydroxide filtrate to obtain sodium hydroxide solids when 95 percent of water is distilled, and crushing the obtained sodium hydroxide solids to obtain caustic soda blocks.

Description

technical field [0001] The invention relates to the technical field of treatment and utilization of waste residues, in particular to a method for producing ordinary zinc carbonate and co-producing caustic soda with sodium hydrosulfite filter residues. Background technique [0002] Sodium Hydrosulfite is commonly known as Sodium Hydrosulfite. It is a strong reducing agent. It is widely used in textile, printing and dyeing industries as dyeing aids and bleaching agents. It is also a raw material for synthetic dyes in the pharmaceutical industry and is also used in copper plates. Printing and analysis reagents, etc. [0003] In recent years, the market demand for hydrosulfite has become increasingly strong and growing rapidly. In particular, the demand for hydrosulfite in the textile and printing and dyeing industries has risen steadily, with an increase of 10-15% every year. In addition, with the production and development of domestic high-end newsprint and the improvement o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00B09B3/00C01D1/22
CPCY02W30/82
Inventor 王嘉兴
Owner 汪晋强
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