Method for preparing lead cyanurate by using lead sulfate leaching liquid

A technology of lead cyanurate and lead sulfate, which is applied in the direction of organic chemistry, can solve the problems of unrealistic lead isocyanurate and complex components of waste lead, and achieve the effects of easy industrial production, rapid response and simple process

Inactive Publication Date: 2017-06-13
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of waste lead is produced every year, such as lead paste separated from waste lead-acid batteries and waste lead slag in the smelting industry. However, the composition of these waste lead is complex and the sources are extensive. The waste lead is directly used to prepare lead cyanurate and isocyanate. Lead urate is not realistic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add lead sulfate leaching solution into the stirred tank, add cyanuric acid with 1 times the molar amount of lead sulfate in the solution, stir evenly, add potassium hydroxide solid with 3 times the molar amount of cyanuric acid, react at 40°C for 2 hours, filter out the solid, and wash Drying to obtain lead cyanurate solid. The conversion of lead sulfate was 97%, and the yield was 97%.

Embodiment 2

[0019] Add lead sulfate leaching solution into the stirred tank, add cyanuric acid with 0.33 times the molar amount of lead sulfate in the solution, stir evenly, add sodium hydroxide solid with 3 times the molar amount of cyanuric acid, react at 60°C for 2 hours, filter out the solid, and wash Drying to obtain lead cyanurate solid. The conversion of lead sulfate was 96%, and the yield was 96%.

Embodiment 3

[0021] Add lead sulfate leaching solution into the stirred tank, add cyanuric acid with 0.5 times the molar amount of lead sulfate in the solution, stir evenly, add ammonia water with 3 times the molar amount of cyanuric acid, react at 80°C for 5 hours, filter out the solid, wash and dry, lead cyanurate solid. The conversion of lead sulfate was 95% and the yield was 95%.

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Abstract

The invention discloses a method for preparing lead cyanurate by using a lead sulfate leaching liquid. According to the method provided by the invention, cyanuric acid is added into the lead sulfate leaching liquid, and alkali is added to perform reaction to prepare the lead cyanurate. The lead sulfate leaching liquid is obtained by treating pure lead sulfate or waste lead, or the pure lead sulfate or waste lead contains the lead sulfate leaching liquid, so that organic lead salt with high additional value can be prepared conveniently, and the method is favorable for cyclic utilization of lead source, has the characteristics of simple process and rapid reaction, and can realize industrialized production easily.

Description

technical field [0001] The invention belongs to the field of resource recovery and utilization, and in particular relates to a method for preparing lead cyanurate by utilizing lead sulfate leaching solution. Background technique [0002] Lead cyanurate can be used as heat stabilizer and lubricant for polyvinyl chloride. It has good lubricity and light and heat stability. It can replace lead sulfate in lead stabilizers for polyvinyl chloride. Their annual demand reaches several One hundred thousand tons. The preparation method of these lead cyanurates mainly contains two kinds, and the one, utilizes lead oxide and cyanuric acid reaction preparation, the 2nd, utilizes soluble lead salt such as lead acetate or lead nitrate and sodium, potassium salt of organic matter to make. However, both of these methods start with lead oxide or use lead oxide to prepare soluble lead salts, which need to consume a large amount of refined lead resources, because lead oxide is usually prepared...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C07D251/32
CPCC07D251/32
Inventor曹靖梁赛张俊丰
OwnerXIANGTAN UNIV