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Method for producing general zinc nitrate and co-generating sodium hydroxide by using sodium hydrosulfite filter residue

A technology of zinc nitrate 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 general zinc nitrate and co-generating sodium hydroxide by using sodium hydrosulfite filter residue
  • Method for producing general zinc nitrate and co-generating sodium hydroxide by using sodium hydrosulfite filter residue

Examples

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Effect test

Embodiment 1

[0020] refer to figure 1 , a method for coproducing common zinc nitrate 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 hydrosulfite filter residue, disposing Form a suspension, and configure sodium nitrate solution at the same time; the suspension and sodium nitrate solution are dropped into the first corrosion-resistant reactor (1) successively according to the pure substance mass ratio of zinc hydroxide and sodium nitrate as 1: 1.7 for chemical Reaction, obtain containing zinc nitrate and sodium hydroxide mixture; Gain containing zinc nitrate and sodium hydroxide mixture is filtered through the first filter (2), obtain a small amount of insoluble impurity and the filtrate of clarification, insoluble impurity calcining and Deep burial; the resulting clarified filtrate i...

Embodiment 2

[0022] refer to figure 1 , a method for coproducing common zinc nitrate 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 hydrosulfite filter residue, disposing Form a suspension, and configure sodium nitrate solution at the same time; the suspension and sodium nitrate solution are dropped into the first corrosion-resistant reactor (1) successively according to the pure substance mass ratio of zinc hydroxide and sodium nitrate as 1: 1.9 for chemical Reaction, obtain containing zinc nitrate and sodium hydroxide mixture; Gain containing zinc nitrate and sodium hydroxide mixture is filtered through the first filter (2), obtain a small amount of insoluble impurity and the filtrate of clarification, insoluble impurity calcining and Deep burial; the resulting clarified filtrate i...

Embodiment 3

[0024] refer to figure 1 , a method for coproducing common zinc nitrate 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 hydrosulfite filter residue, disposing Form a suspension, and configure sodium nitrate solution at the same time; the suspension and sodium nitrate solution are dropped into the first corrosion-resistant reactor (1) successively according to the pure substance mass ratio of zinc hydroxide and sodium nitrate as 1: 1.5 for chemical Reaction, obtain containing zinc nitrate and sodium hydroxide mixture; Gain containing zinc nitrate and sodium hydroxide mixture is filtered through the first filter (2), obtain a small amount of insoluble impurity and the filtrate of clarification, insoluble impurity calcining and Deep burial; the resulting clarified filtrate i...

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Abstract

The invention provides a method for producing general zinc nitrate and co-generating sodium hydroxide by using sodium hydrosulfite filter residue, comprising the following steps of: crushing the sodium hydrosulfite filter residue, preparing into a suspension and simultaneously preparing a sodium nitrate solution; carrying out a chemical reaction on the suspension and the sodium nitrate solution according to the mass ratio of 1:1.5-1.9 of zinc hydroxide to a pure substance of the sodium nitrate to obtain a mixture containing zinc nitrate and sodium hydroxide; filtering the mixture to obtain a clarified filtrate; distilling the clarified filtrate to obtain a zinc nitrate saturated solution, discharging and cooling; at the same time, separating out a zinc nitrate crystal and filtering to obtain the zinc nitrate crystal and a solution containing the sodium hydroxide; washing, spinning and crushing the zinc nitrate crystal to obtain a zinc nitrate crystal product; continuously distilling the solution containing the sodium hydroxide; when the water content is only 5 percent, discharging, cooling and crushing to obtain a sodium hydroxide product.

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 common zinc nitrate 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 of th...

Claims

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Application Information

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IPC IPC(8): C01G9/00B09B3/00C01D1/22
Inventor 王嘉兴
Owner 汪晋强
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