CN1740781A - Novel blue variable colour indicator agent and producing process thereof - Google Patents
Novel blue variable colour indicator agent and producing process thereof Download PDFInfo
- Publication number
- CN1740781A CN1740781A CN 200510044579 CN200510044579A CN1740781A CN 1740781 A CN1740781 A CN 1740781A CN 200510044579 CN200510044579 CN 200510044579 CN 200510044579 A CN200510044579 A CN 200510044579A CN 1740781 A CN1740781 A CN 1740781A
- Authority
- CN
- China
- Prior art keywords
- blue
- indicator
- cobalt
- variable colour
- production method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
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
The present invention relates to environment and do the improvement of wet change indicator product, specifically is a kind of novel blue variable colour indicator agent and production method thereof, and it belongs to technical field of inorganic chemical industry.
Background technology
Be used to indicate blue glue of mainly containing of environmental change and blue-gel indicator at present, this indicator normally is raw material with silica gel, contaminates cobalt chloride (CoCl
2.6H
2O) dip-dyeing solution is made.This indicator directly uses or partly mixes in drying agent and use change color when utilizing its moisture absorption: become redness by blueness, reach the purpose of colour developing or detection entire environment humidity.Because this blue-gel indicator is the cobalt chloride (CoCl by the band water of crystallization
2.6H
2O) make, this compound is through the research of external relevant department, and its toxicity is harmful, to be listed in two class carcinogenic substances, when long-term use or manufacturing contact personnel's health is brought harm, some countries have determined progressively to stop using blue glue and blue-gel indicator product thereof at present.Now, color discoloring indicator has appearred both at home and abroad.For example: red glue indicator, yellow glue indicator, lac indicator and production method thereof that patent [CN1281144A] " color discoloring indicator and production method thereof " is introduced.Show after the above patented product moisture absorption that different colours changes, but also do not occur at present that identical with blue glue and blue-gel indicator, color has blueness to become the product of red variable color after the moisture absorption.Blue glue and blue-gel indicator have used decades on market, and people come the variation of indicative for environments humidity to become a kind of custom to become redness by blueness.Simultaneously, people are in the demand that improves healthy living, wish that urgently a kind of novel no cobalt blue color indicator product comes out.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the cobalt chloride (CoCl by the band water of crystallization
2.6H
2O) blue-gel indicator of making harm that health of people is brought provides a kind of novel blue variable colour indicator agent.This indicator does not contain cobalt, does not contain organic solvent, and outward appearance is blue, become redness after the moisture absorption, change color is consistent with us traditional blue glue and blue-gel indicator, meets the change color of people's custom, this indicator has also kept the performance of original adsorbent, has increased the performance of colour developing indication humidity.
Task of the present invention is finished by following technical scheme: developed a kind of novel blue variable colour indicator agent, it is the adsorbent that the tangible particle of silica gel, Alusil is made, and handles this blue variable colour indicator agent that makes through no cobalt dyeing liquor and has adsorbance under following physical and chemical indexes: the RH20%: 3.0-12.0%; Adsorbance under the RH50%: 10.0-30.0%; Heating loss :≤5.0%; The reversible color scope of this indicator is:
In the following time of drying regime of RH10%, this indicator shows blue;
In the following time of state of RH20%, this indicator shows bluish violet;
In the following time of state of RH35%, this indicator shows aubergine;
In the state of RH50% or dampness following time, this indicator shows red.
A kind of production method of described novel blue indicator, it is a kind of with in the tangible particle of silica gel, Alusil, not having cobalt dyeing handles, the hygrometric state of selecting this adsorbent is or/and the material of dry state, immerses in proportion to contain in the aqueous solution that has or not the cobalt dyeing liquor, contaminates at normal temperatures 2-48 hour, then leach, drying is handled, and bake out temperature 60-140 ℃, makes novel blue variable colour indicator agent.
Described dyeing liquor, comprising: acid red, Weak Acid Red, methyl blue, the blue 4B of alkali, Congo red, dimethyl diaminophenazine chloride, thymol blue, one or more among the purple 4B of benzene.
The aqueous solution of described no cobalt dyeing liquor, its bulking value specific concentration is: 0.001-5.00%; The pH value of control solution is at 0-12.0 in the dyeing course.
Described no cobalt dyeing liquor, phosphoric acid is selected in the adjusting of its pH value for use, sulfuric acid, hydrochloric acid, citric acid, tartrate, one or more in the carbonic acid; Or select in ammoniacal liquor, the NaOH one or both for use.
Described hygrometric state is or/and the w/v of the material of dry state and no cobalt dyeing liquor is (2.5-0.5): 1.
The invention has the advantages that: because the present invention has abandoned cobalt chloride (CoCl
2.6H
2O) this carcinogen does not contain cobalt chloride (CoCl in the indicator that makes
2.6H
2Thereby guaranteed user and fabricator's health O).Because the no cobalt blue color indicator that the present invention makes, it is in reversible colour developing changes, and the reversible color scope of this indicator is: under the drying regime: blueness; Under the dampness during RH50%: show red.This variable color with traditional blue glue and blue-gel indicator thereof is consistent, meets the variable color custom that people use always.Finished product indicator of the present invention absorbs moisture between RH10-50%, can there be obvious color to change, can visual indication dry condition and moisture absorption degree, simultaneously, can between 60-140 ℃, heat and recover the blueness that original finished product does not have the cobalt blue color indicator because of absorbing this indicator that moisture changed, can continue use.Indicator of the present invention can be used for absorbing the moisture in the neutral gas; Be used for the protection against the tide of instrument and meter equipment, anti-corrosion; The dehydration that is used for chemical products is refining; It has wide range of applications.
Embodiment
Present invention is described by embodiment below, but should be pointed out that these examples of implementation only are to explain the present invention, rather than limitation of the present invention.
The Kiselgel A that adopts in the following examples: between the granularity 0.5-8mm, average pore size 20-30A, specific surface 600m
2More than/the g, more than the bulk density 500g/l.All there is Qingdao Marine Chemical Co., Ltd. to produce.
Embodiment 1:
Preparation 1000ml0.5wt% acid red aqueous solution is regulated PH=1.5 with sulfuric acid, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaks 16 hours, pulls silica gel out, dries to moisture below 4.0% at 60 ℃, and the analysis data see Table 1.
Embodiment 2:
The acid bright red aqueous solution of preparation 1000ml1.0wt% is regulated PH=1.0 with sulfuric acid, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaks 10 hours, pulls silica gel out, dries to moisture 4.0wt% at 120 ℃, analyzes data and sees Table 1.
Embodiment 3:
Preparation 1000ml0.5wt% methyl blue aqueous solution is regulated PH=9.0 with soda ash, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaks 8 hours, pulls silica gel out, dries to moisture 4.0wt% at 70 ℃, analyzes data and sees Table 1.
Embodiment 4:
The purple 4B aqueous solution of preparation 1000ml2.0wt% benzene is regulated PH=3.0 with sulfuric acid, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaks 16 hours, pulls silica gel out, dries to moisture 4.0wt% at 80 ℃, analyzes data and sees Table 1.
Embodiment 5:
Preparation 1000ml1.0wt% Congo red aqueous solution is regulated PH=9.0 with soda ash, is that the Kiselgel A of 2-4mm is put into wherein with the granularity of 1kg moisture absorption, soaks 20 hours, pulls silica gel out, dries to moisture 4.0wt% at 120 ℃, and the analysis data see Table 1.
Embodiment 6:
Preparation 1000ml1.0wt% thymol blue and 0.1wt% neutral red aqueous solution are regulated PH=9.5 with soda ash, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaked 14 hours, pull silica gel out, dry to moisture 4.0wt%, analyze data and see Table 1 at 130 ℃.
Embodiment 7:
Preparation 1000ml 0.1wt% neutral red aqueous solution is regulated PH=1.5 with sulfuric acid, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaks 16 hours, pulls silica gel out, dries to moisture 4.0wt% at 120 ℃, analyzes data and sees Table 1.
Embodiment 8:
The blue 4B aqueous solution of preparation 1000ml 0.1wt% alkali is regulated PH=10 with soda ash, and the granularity that 1kg moisture absorption is good is that the Kiselgel A of 2-4mm is put into wherein, soaks 8 hours, pulls silica gel out, dries to moisture 4.0wt% at 140 ℃, analyzes data and sees Table 1.
Table 1:
Those of ordinary skill in the art can understand, and in protection scope of the present invention, makes amendment for the foregoing description, and it all is possible adding and replacing, and it does not all exceed protection scope of the present invention.
Claims (6)
1, a kind of novel blue variable colour indicator agent, it is the adsorbent that the tangible particle of silica gel, Alusil is made, and handles this blue variable colour indicator agent that makes through no cobalt dyeing liquor and has adsorbance under following physical and chemical indexes: the RH20%: 3.0-12.0%; Adsorbance under the RH50%: 10.0-30.0%; Heating loss :≤5.0%; It is characterized in that: the reversible color scope of this indicator is:
In the following time of drying regime of RH10%, this indicator shows blue;
In the following time of state of RH20%, this indicator shows bluish violet;
In the following time of state of RH35%, this indicator shows aubergine;
In the state of RH50% or dampness following time, this indicator shows red.
2, a kind of production method of the indicator of novel blue according to claim 1, be a kind of with in the tangible particle of silica gel, Alusil, not having cobalt dyeing handles, the hygrometric state of selecting this adsorbent is or/and the material of dry state, immerses in proportion to contain in the aqueous solution that has or not the cobalt dyeing liquor, contaminates at normal temperatures 2-48 hour, then leach, drying is handled, and bake out temperature 60-140 ℃, makes novel blue variable colour indicator agent.
3, according to the production method of the described novel blue variable colour indicator agent of claim 2, it is characterized in that: described dyeing liquor, comprising: acid red, Weak Acid Red, methyl blue, the blue 4B of alkali is Congo red, dimethyl diaminophenazine chloride, white in phenol indigo plant, one or more among the purple 4B of benzene.
4, according to the production method of the described novel blue variable colour indicator agent of claim 2, it is characterized in that: the aqueous solution of described no cobalt dyeing liquor, its bulking value specific concentration is: 0.001-5.00%; The pH value of control solution is at 0-12.0 in the dyeing course.
5, according to the production method of the described novel blue variable colour indicator agent of claim 4, it is characterized in that: described no cobalt dyeing liquor, phosphoric acid is selected in the adjusting of its pH value for use, sulfuric acid, hydrochloric acid, citric acid, tartrate, one or more in the carbonic acid; Or select in ammoniacal liquor, the NaOH one or both for use.
6, according to the production method of claim 2 or 3 described no cobalt blue color indicators, it is characterized in that: described hygrometric state is or/and the w/v of the material of dry state and no cobalt dyeing liquor is (2.5-0.5): 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100445792A CN100545637C (en) | 2005-09-18 | 2005-09-18 | Blue variable colour indicator agent and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100445792A CN100545637C (en) | 2005-09-18 | 2005-09-18 | Blue variable colour indicator agent and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1740781A true CN1740781A (en) | 2006-03-01 |
| CN100545637C CN100545637C (en) | 2009-09-30 |
Family
ID=36093229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100445792A Expired - Fee Related CN100545637C (en) | 2005-09-18 | 2005-09-18 | Blue variable colour indicator agent and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100545637C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091321A (en) * | 2012-12-25 | 2013-05-08 | 山东辛化硅胶有限公司 | Cobaltless blue color-changing indicator and production method thereof |
| CN104986142A (en) * | 2015-08-03 | 2015-10-21 | 苏州逗乐儿童用品有限公司 | Children's safety belt assembly |
| CN105865652A (en) * | 2016-03-30 | 2016-08-17 | 深圳九星印刷包装集团有限公司 | Indicating device and preparation method thereof |
| CN107179315A (en) * | 2017-07-11 | 2017-09-19 | 江苏方天电力技术有限公司 | A kind of transformer oil moisture measurement test paper, preparation and application |
| CN109173627A (en) * | 2018-10-25 | 2019-01-11 | 青岛美高集团有限公司 | It is a kind of change colour silica-gel desiccant preparation method and by its resulting discoloration silica gel |
-
2005
- 2005-09-18 CN CNB2005100445792A patent/CN100545637C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091321A (en) * | 2012-12-25 | 2013-05-08 | 山东辛化硅胶有限公司 | Cobaltless blue color-changing indicator and production method thereof |
| CN104986142A (en) * | 2015-08-03 | 2015-10-21 | 苏州逗乐儿童用品有限公司 | Children's safety belt assembly |
| CN105865652A (en) * | 2016-03-30 | 2016-08-17 | 深圳九星印刷包装集团有限公司 | Indicating device and preparation method thereof |
| CN105865652B (en) * | 2016-03-30 | 2018-11-23 | 深圳九星印刷包装集团有限公司 | Instruction device and preparation method thereof |
| CN107179315A (en) * | 2017-07-11 | 2017-09-19 | 江苏方天电力技术有限公司 | A kind of transformer oil moisture measurement test paper, preparation and application |
| CN107179315B (en) * | 2017-07-11 | 2019-08-20 | 江苏方天电力技术有限公司 | A kind of transformer oil moisture measurement test paper, preparation and application |
| CN109173627A (en) * | 2018-10-25 | 2019-01-11 | 青岛美高集团有限公司 | It is a kind of change colour silica-gel desiccant preparation method and by its resulting discoloration silica gel |
| CN109173627B (en) * | 2018-10-25 | 2021-04-09 | 青岛美高集团有限公司 | Preparation method of allochroic silica gel drying agent and allochroic silica gel prepared by same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100545637C (en) | 2009-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jiang et al. | Preparation and characterization of indicator films from carboxymethyl-cellulose/starch and purple sweet potato (Ipomoea batatas (L.) lam) anthocyanins for monitoring fish freshness | |
| CN1740781A (en) | Novel blue variable colour indicator agent and producing process thereof | |
| Zhang et al. | A visual and organic vapor sensitive photonic crystal sensor consisting of polymer-infiltrated SiO 2 inverse opal | |
| KR101877606B1 (en) | pH indicator film comprising natural anthocyanin and biopolymer, and method for preparing the same | |
| Wong et al. | Effect of temperature, particle size and percentage deacetylation on the adsorption of acid dyes on chitosan | |
| KR20070054652A (en) | Pigments having angle dependence of the interference colors and its production process | |
| He et al. | Intelligent pH-sensing film based on polyvinyl alcohol/cellulose nanocrystal with purple cabbage anthocyanins for visually monitoring shrimp freshness | |
| CN113717483B (en) | Polyvinyl alcohol composite material with ultraviolet blocking and antibacterial functions and preparation method thereof | |
| CN1128361C (en) | Multi-colour allochromatic indicator and its producing method | |
| CN1590987A (en) | Humidity indicators | |
| Tang et al. | Kinetics of dyeing natural protein fibers with silver nanoparticles | |
| Li et al. | Nanocellulose-enhanced smart film for the accurate monitoring of shrimp freshness via anthocyanin-induced color changes | |
| Molaei et al. | Application of bacterial nanocellulose decorated with zeolitic imidazolate framework (ZIF-L) as a platform for food freshness monitoring | |
| RU2626352C2 (en) | Method of producing acid-basic indicator for creating flexible ph-sensitive systems | |
| CN1269507A (en) | Color discoloring indicator and its production process | |
| CN111606357A (en) | Gas sensing material of zinc ferrite and zinc stannate, preparation method and application | |
| EP0354314B1 (en) | Thermally stable iron oxide pigments with a gamma-iron oxide structure, process for manufacturing them and their use | |
| CN105293541A (en) | Hydrotalcite used in polymer and preparation method thereof | |
| KR20090087296A (en) | Method for preparing ph measure means and the ph measure means prepared by the method | |
| CN115368637B (en) | High-performance multifunctional carboxymethyl cellulose-based composite material and preparation method and application thereof | |
| CN108195779B (en) | Method for testing surface pH of mineral sample by using dye indicator and application thereof | |
| CN107185561B (en) | BiOIxBr(1-x)@SiO2Photocatalyst and application thereof | |
| Zhu et al. | Natural dye modified hemp fibrous foam for colorimetric NH3 sensing | |
| CN114958343B (en) | Eu-based 3+ High-water-stability double-emission fluorescent probe of-MOF (metal oxide semiconductor field effect transistor), and preparation method and application thereof | |
| CN112029158B (en) | Chitosan-based composite response membrane with carbon dioxide response behavior and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20140918 |
|
| EXPY | Termination of patent right or utility model |