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Method for preparing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residues

A technology of zinc phosphate and sodium hydrosulfite, applied in phosphorus compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of single use, inability to consume zinc powder waste residue, etc., achieving simple operation, less by-products, and low equipment investment costs Effect

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

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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 preparing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residues
  • Method for preparing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residues
  • Method for preparing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residues

Examples

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Embodiment 1

[0034] refer to figure 1 , a method for producing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residue, get 495kg of sodium hydrosulfate filter residue, convert the content of zinc hydroxide in the filter residue of sodium hydrosulfite to be 297kg, and pulverize the sodium hydrosulfate filter residue, configure it into a suspension, Calcium chloride solution is configured simultaneously; the suspension and calcium chloride solution are dropped into the first corrosion-resistant reactor (1) successively by the pure substance mass ratio of zinc hydroxide and calcium chloride in a ratio of 1: 1.12, and carried out under stirring. chemical reaction to obtain a mixture containing zinc chloride and calcium hydroxide; the mixture containing zinc chloride and calcium hydroxide is filtered through the first filter (2) to obtain a clarified filtrate containing zinc chloride and calcium hydroxide white filter cake; the white filter cake containing calcium hydroxide ...

Embodiment 2

[0036] refer to figure 1, a method for producing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residue, weighing 495kg of sodium hydrosulfite residue, converting the content of zinc hydroxide in the sodium hydrosulfite waste residue to 297kg, pulverizing the sodium hydrosulfite filter residue, and configuring it into a suspension, and simultaneously configuring Calcium chloride solution; put the suspension and calcium chloride solution into the first corrosion-resistant reactor (1) in turn according to the pure substance mass ratio of zinc hydroxide and calcium chloride of 1:0.92, and carry out the chemical reaction under stirring , to obtain a mixture containing zinc chloride and calcium hydroxide; the mixture containing zinc chloride and calcium hydroxide is filtered through the first filter (2), to obtain a clear filtrate containing zinc chloride and a white liquid containing calcium hydroxide Filter cake: the white filter cake containing calcium hydrox...

Embodiment 3

[0039] refer to figure 1 , a method for producing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residue, weighing 495kg of sodium hydrosulfite residue, converting the content of zinc hydroxide in the sodium hydrosulfite waste residue to be 297kg, pulverizing the sodium hydrosulfite filter residue, and configuring it into a suspension, and simultaneously using Ammonia alkali waste liquid containing calcium chloride is prepared with calcium chloride solution; the suspension and calcium chloride solution are sequentially put into the first corrosion-resistant reactor according to the pure substance mass ratio of zinc hydroxide and calcium chloride at 1:1.32 In (1), chemical reaction is carried out under stirring to obtain a mixture containing zinc chloride and calcium hydroxide; the mixture containing zinc chloride and calcium hydroxide is filtered through the first filter (2) to obtain clarified chloride containing The filtrate of zinc and the white filter c...

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Abstract

The invention provides a method for preparing zinc phosphate and hydrate thereof with sodium hydrosulfite filter residues. The method comprises the following steps: using the filter residues of sodium hydrosulfite and calcium chloride to react and obtain the mixture of a zinc chloride solution and calcium hydroxide precipitate, filtering the mixture to obtain a zinc chloride solution, reacting with phosphoric acid to obtain the mixed solution of zinc phosphate tetrahydrate and hydrochloric acid, filtering the mixed solution to obtain the filtrate of hydrochloric acid and the white filter cake of zinc phosphate tetrahydrate; washing the white filter cake of zinc phosphate tetrahydrate, drying, grinding to obtain a zinc phosphate tetrahydrate powder product, and calcining the zinc phosphate tetrahydrate powder product at 100 DEG C, 190 DEG C and 250 DEG C respectively to obtain a zinc phosphate dihydrate product, a zinc phosphate monohydrate product and an anhydrous zinc phosphate product.

Description

technical field [0001] The invention relates to the technical field of treatment and utilization of sodium hydrosulfite filter residue, in particular to a method for producing zinc phosphate and hydrate thereof by using sodium hydrosulfite filter residue. 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 improveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/37
Inventor 王嘉兴
Owner 汪晋强
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