Novel blue variable colour indicator agent and producing process thereof

A production method and indicator technology, which are applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., to achieve a wide range of applications.

Inactive Publication Date: 2006-03-01
青岛海洋化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patented products show different color changes after absorbing moisture, but it has not yet appeared, which is the same as the blue glue and blue glue indicator, and the color changes from blue to red after moisture absorption.

Method used

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  • Novel blue variable colour indicator agent and producing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare 1000ml of 0.5wt% acid red aqueous solution, adjust the pH to 1.5 with sulfuric acid, put 1kg of fine-pored silica gel with a particle size of 2-4mm that has absorbed moisture into it, soak for 16 hours, remove the silica gel, and dry it at 60°C until it reaches moisture Below 4.0%, see Table 1 for the analysis data.

Embodiment 2

[0020] Prepare 1000ml of 1.0wt% acid brilliant red aqueous solution, adjust the pH to 1.0 with sulfuric acid, put 1 kg of fine-pore silica gel with a particle size of 2-4mm that has absorbed moisture into it, soak for 10 hours, remove the silica gel, and dry at 120°C until The moisture is below 4.0wt%, and the analysis data are shown in Table 1.

Embodiment 3

[0022] Prepare 1000ml of 0.5wt% methylene blue aqueous solution, adjust the pH to 9.0 with soda ash, put 1kg of fine-pored silica gel with a particle size of 2-4mm that has absorbed moisture into it, soak for 8 hours, remove the silica gel, and dry at 70°C until The moisture is below 4.0wt%, and the analysis data are shown in Table 1.

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Abstract

The present invention discloses a blue discoloration indicator. It is made up by utilizing tangible granular adsorbent of silica gel and alumino silica gel and making it undergo the process of cobaltless dyeing solution treatment. It has the following physical and chemical indexes: adsorptive capacity below RH20% is 3.0-12.0%, adsorptive capacity below RH5-% is 10.0-30.0% and heating loss is less than or equal to 5.0%, and the reversible discoloration range is that under the condition of RH10%,20%,35% and 50% it can display blue, blue-purple, mauve and red. Said indicator can be used for absorbing water content in neutral gas.

Description

technical field [0001] The invention relates to the improvement of an indicator product for environmental dry-humidity change, specifically a novel blue color-changing indicator and a production method thereof, which belong to the technical field of inorganic chemical industry. Background technique [0002] At present, blue glue and blue glue indicator are mainly used to indicate environmental changes. The indicator is usually made of silica gel, which is impregnated with cobalt chloride (CoCl 2 .6H 2 O) Made from liquid dye. The indicator is used directly or partly mixed in the desiccant, and the color changes when it absorbs moisture: from blue to red, so as to achieve the purpose of color development or detection of the humidity of the whole environment. Since the blue gum indicator is made of cobalt chloride (CoCl 2 .6H 2 O), this compound has been studied by relevant foreign departments. Its toxicity is harmful to the human body, so it is listed as a second-class ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 李春志张崇岷
Owner 青岛海洋化工有限公司
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