CN1111172C - Improved natural latex coagulant - Google Patents
Improved natural latex coagulant Download PDFInfo
- Publication number
- CN1111172C CN1111172C CN99111110A CN99111110A CN1111172C CN 1111172 C CN1111172 C CN 1111172C CN 99111110 A CN99111110 A CN 99111110A CN 99111110 A CN99111110 A CN 99111110A CN 1111172 C CN1111172 C CN 1111172C
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- coagulant
- ethanol
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Abstract
The present invention provides an improved natural fresh latex coagulant for the primary processing of natural rubber, wherein the present invention contains sulphuric acid, water, ethanol, ethylene glycol and N-phenyl-beta-naphthylamine(an aging resistant agent D). The improved coagulant has sufficient desired initial raw material resources and low price, and the price is 50 to 60% of the price of the existing coagulant-acetic acid and is 55 to 60% of the price of formic acid. The present invention is easy to control in use, completely solidifies the natural fresh latex and ensures a preparation rate and the quality requirement of the primary processing of the natural rubber.
Description
The present invention relates to latex coagulant in the natural rubber preliminary working.
In the natural rubber preliminary working, used latex coagulant adopts acid or glacial acetic acid usually.Acetic acid exists the starting raw material resource scarcity, costs an arm and a leg, and the formic acid price is not cheap yet.Simultaneously, these two kinds of acid all have certain irritating smell and human body are had certain corrodibility.Also has a kind of Liang Yuanhan of being invention " a kind of type of natural latex coagulator [CN87104720] ", this peptizer is by sulfuric acid, ethanol, 2,3-dyhydrobutanedioic acid and water are formed, but it in use exists wayward and solidifies shortcomings such as incomplete.
The objective of the invention is, at the problems referred to above, study a kind of easy handling in use, fresh latex is solidified fully, required starting raw material resource abundance, inexpensive can fully guarantee rubber quality simultaneously and reduce irritating smell and harmless modified version peptizer.
The technological method that the present invention taked is, earlier that ethanol and water is fully miscible, when system rises to certain temperature, add ethylene glycol, stirring makes it fully miscible, then, slowly add the vitriol oil of handling with sulfide while stirring, under regular hour and temperature, carry out esterification, reaction finishes the back and adds minor N-Phenyl beta naphthylamine, stir, till it dissolved fully, material ratio was a sulfuric acid in the system: water-ethanol: ethylene glycol: N-Phenyl beta naphthylamine=65-70: 10-15: 5-10: 3-5: 0.01-0.02, cool off at last, precipitation is filtered, and obtains the finished product.The proportion of product is 1.50 colourless transparent liquid.
The modified version peptizer is compared with now using peptizer (acid or glacial acetic acid), has following advantage and effect:
1, the required starting raw material aboundresources of modified version peptizer is cheap, is the 50-60% of acetic acid price, the 55-65% of formic acid price, thus reduced the cost of natural rubber preliminary working.
2, the modified version peptizer solidifies fully fresh latex, and the product primary amine that processes reaches more than 98%, can satisfy the requirement of the row yielding and the quality of natural rubber preliminary working fully.
3, modified version peptizer smell not with irritating does not have any corrosion to human body.
The modified version peptizer is compared with the peptizer of Liang Yuanhan invention, has easy handling, solidifies advantage completely.
Facilities and equipments of the present invention are conventional equipment.
Embodiment:
Close the covering in the container of acidproof heat-proof that 100 kilograms of ethanol inputs are filled 150 kg of water, stirred 2-18 minute, when temperature rises to 80 ℃, add 50 kilograms of ethylene glycol, stirred 1 hour, and then, slowly added 700 kilograms of the vitriol oils handled with sulfide while stirring, reacted 8-10 hour, temperature is controlled at below 98 ℃.Reaction finishes the back and adds 1 kilogram of N-Phenyl beta naphthylamine, stirs till it dissolves fully, and solution is put into the water cooler cooling, natural sedimentation 36-42 hour, through centrifuging, obtains 1000 kilograms the finished product.
Claims (1)
1, a kind of follow-on natural latex coagulant, it is characterized in that this peptizer is prepared by following method: earlier that ethanol and water is fully miscible, when temperature rises to 80 ℃, add ethylene glycol, stirring makes it fully miscible, then, slowly adds the vitriol oil while stirring, reacted 8-10 hour, temperature is controlled at below 98 ℃, and reaction finishes the back and adds minor N-Phenyl beta naphthylamine, stirs, till it dissolves fully, material ratio is a sulfuric acid in the system: water-ethanol: ethylene glycol: N-Phenyl beta naphthylamine=65-70: 10-15: 5-10: 3-5: 0.01-0.02, cool off precipitation at last, filter, obtain the finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99111110A CN1111172C (en) | 1999-07-23 | 1999-07-23 | Improved natural latex coagulant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99111110A CN1111172C (en) | 1999-07-23 | 1999-07-23 | Improved natural latex coagulant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1241576A CN1241576A (en) | 2000-01-19 |
| CN1111172C true CN1111172C (en) | 2003-06-11 |
Family
ID=5274884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99111110A Expired - Fee Related CN1111172C (en) | 1999-07-23 | 1999-07-23 | Improved natural latex coagulant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1111172C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100482690C (en) * | 2005-08-26 | 2009-04-29 | 中国热带农业科学院农产品加工研究所 | Method of coagulating natural rubber fresh latex with fungus culture medium |
| CN104341540B (en) * | 2013-08-05 | 2016-08-10 | 海南大学 | A kind of method of rapid solidification Heveatex |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1017068B (en) * | 1989-05-27 | 1992-06-17 | 合肥工业大学 | Metal-surface strengthening technique by ceramic film |
| JP4089802B2 (en) * | 1997-09-19 | 2008-05-28 | エービービー シュヴァイツ アクチェンゲゼルシャフト | Compressor impeller fixing device used for high-speed rotating turbomachine |
-
1999
- 1999-07-23 CN CN99111110A patent/CN1111172C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1017068B (en) * | 1989-05-27 | 1992-06-17 | 合肥工业大学 | Metal-surface strengthening technique by ceramic film |
| JP4089802B2 (en) * | 1997-09-19 | 2008-05-28 | エービービー シュヴァイツ アクチェンゲゼルシャフト | Compressor impeller fixing device used for high-speed rotating turbomachine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1241576A (en) | 2000-01-19 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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: 20030611 Termination date: 20150723 |
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| EXPY | Termination of patent right or utility model |