Method for washing residual quinoline phosphomolybdate precipitate in glass sand core crucible

A technology of quinoline phosphomolybdic acid and glass sand core, which is applied in the direction of liquid cleaning methods, cleaning methods and utensils, chemical instruments and methods, etc., can solve the problems of high cost, low efficiency, and large amount of medicament usage, and achieve Improves dissolution and separation speed, improves washing efficiency, and shortens drying time

Pending Publication Date: 2022-07-01
YUNNAN PHOSPHATE CHEM GROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method for washing residual quinoline phosphomolybdic acid precipitation in a glass sand core crucible, so as to solve the problems of large amount of medicament used, high cost and low efficiency in the existing treatment methods

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  • Method for washing residual quinoline phosphomolybdate precipitate in glass sand core crucible
  • Method for washing residual quinoline phosphomolybdate precipitate in glass sand core crucible

Examples

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Embodiment 1

[0017] The sodium hydroxide solution with a mass concentration of 1% is compounded with ammonia water to form a 1:1 soaking solution for later use. Put the soaking liquid into a plastic container with a lid, and the soaking liquid accounts for 1 / 2 to 2 / 3 of the volume of the container.

[0018] The Analysis and Testing Department of the R&D Center of a Phosphate Group in Yunnan Province completed a batch of 4# glass crucibles for the gravimetric method of quinoline phosphomolybdate (for the content of phosphorus pentoxide in phosphate rock). Wear rubber gloves), pat the bottom lightly, pat out the quinoline phosphomolybdate filter cake and discard, and rinse the glass sand core crucible with the residual quinoline phosphomolybdate precipitation with tap water (mainly rinse the side with the residual precipitation), Put the glass crucible into the soaking solution, cover it, and apply ultrasonic waves for 15 minutes. Take out the ultrasonically cleaned crucible and rinse it wi...

Embodiment 2

[0024] The sodium hydroxide solution with a mass concentration of 1% is compounded with ammonia water to form a 1:1 soaking solution for later use. Put the soaking liquid into a plastic container with a lid, and the soaking liquid accounts for 1 / 2 to 2 / 3 of the volume of the container.

[0025] A batch of 4# glass crucibles for the gravimetric method of quinoline phosphomolybdate (the content of phosphorus pentoxide in the phosphate fertilizer) were prepared in a concentrator in Jinning, Yunnan. Rinse the glass sand core crucible with the residual quinoline phosphomolybdate precipitation with tap water, put the crucible into the soaking solution, cover the lid, apply ultrasonic waves for 20 minutes, take out the crucible and rinse with tap water, Rinse with distilled water for 3 times, put it into a commercial microwave oven, microwave it on medium heat (500w power) for 5 minutes, take it out and place it in a desiccator to cool, weigh, and then microwave it for 1 time to keep...

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Abstract

The invention discloses a method for washing residual quinoline phosphomolybdate precipitate in a glass sand core crucible, and relates to the technical field of chemical analysis equipment treatment. A sodium hydroxide solution with the mass concentration of 1% and ammonia water are compounded into a soaking solution with the ratio of 1: 1; putting the soaking solution into a container with a cover, putting a crucible cleaned with tap water into the container, covering the container, and carrying out ultrasonic cleaning at room temperature for 15-20 minutes; and the crucible subjected to ultrasonic cleaning is taken out to be cleaned and then put into microwaves to be dried for 5-9 min till the weight is constant. A soaking solution is a compound solution added with 1% sodium hydroxide, more hydroxyl ions are introduced, phosphomolybdic acid quinoline precipitates are more sufficiently and rapidly dissolved, soaking is carried out in an ultrasonic environment, the dissolving and separating speed of the precipitates is remarkably increased, and drying time is greatly shortened through microwave drying. By means of the method, the washing efficiency and the washing effect of the residual quinoline phosphomolybdate precipitate in the glass sand core crucible are greatly improved, and the repeated utilization rate of the glass sand core crucible is increased.

Description

technical field [0001] The invention relates to the technical field of chemical analysis equipment processing, in particular to a method for washing residual quinoline phosphomolybdate precipitates in a glass sand core crucible. Background technique [0002] The quinoline phosphomolybdate gravimetric method is a standard method for the determination of phosphorus. The main raw material is that in an acidic medium, the orthophosphate in the solution to be tested reacts with the quinolybdenum limonene reagent to produce a yellow quinoline phosphomolybdate precipitate. The content of phosphorus in the solution to be tested was calculated by the acid quinoline gravimetric method. The quinoline phosphomolybdate precipitation is filtered using a glass sand core crucible dried to constant weight (the aperture of the filter plate is generally 5um to 15um). After cleaning, the glass crucible can only be scrapped after being used several times. The paper "Introduction to the Treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/08B08B9/093B08B3/08B08B3/12F26B3/347
CPCB08B9/08B08B9/093B08B3/08B08B3/12F26B3/347
Inventor 彭桦王宗勇刘朝竹郭永杰张江坤余慧茹陈凡永朱丽萍倪迎华甘海轩李有华肖喆李芬陈有丽李宁李永林胡美艳刘璐
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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