CN1210867A - New deacetylation of chitin - Google Patents
New deacetylation of chitin Download PDFInfo
- Publication number
- CN1210867A CN1210867A CN 98110327 CN98110327A CN1210867A CN 1210867 A CN1210867 A CN 1210867A CN 98110327 CN98110327 CN 98110327 CN 98110327 A CN98110327 A CN 98110327A CN 1210867 A CN1210867 A CN 1210867A
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- Prior art keywords
- chitin
- deacetylation
- microwave oven
- soaking
- soak
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- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The present invention relates to the preparation of medical health article, especially the deacetylation of semi-finished chitin product to result in chitin product absorbed easily by human body. It features that the process includes the steps of soaking semi-finished chitin product in sodium hydroxide solution, heating of the soaking container in microwave oven, elimination of soaking liquid through hot press, natural cooling and clear water washing. The said process and remove acetyl group completely and obtain high quality chitin product.
Description
A kind of novel method of deacetylation of chitin belongs to the preparing technical field of medication health article, is used for removing the ethanoyl of chitin work in-process, makes chitin become the finished product that can be absorbed by the body.
In the prior art for slough put into after ethanoyl contained in the chitin work in-process generally adopts chitin work in-process and alkali lye to mix reaction cylinder be incubated 80 °～100 ℃ 24 hours to 50 hours.Because soaking time is long, cause the finished color jaundice, the more important thing is that the quantity of deacetylate is unsecured, in fact the highlyest slough 80%.No matter still in medicines and health protection, use and all do not reach due effect in industrial application.Find no identical with the present invention or akin technology by retrieval.
The object of the present invention is to provide a kind of method simple, easy to operate, technical process is short, and required equipment is few, and cost is low, and it is thorough that the chitin ethanoyl after the processing takes off, quality product height, the novel method of coloury deacetylation of chitin.
According to the chemical structure characteristic of chitin ethanoyl and the characteristics of microwave oven heating; at existing questions in the prior art; basic design of the present invention is: earlier with the work in-process chitin with certain density aqueous slkali soaking certain hour; after treating all to be soaked into; put into the microwave oven internal heating together with soaking container; pour into while hot then and remove unnecessary soak solution in the squeezing machine, be cooled to afterwards to wash to phenolphthalein about 50 ℃ and check that nondiscoloration gets final product with clear water.
The novel method of deacetylation of chitin of the present invention; it is characterized in that this method comprising the following steps: (1) to get the chitin work in-process, to put into concentration be that 40～55% sodium hydroxide solution soaks; (2) immersion treated that being put into microwave oven together with the container that soaks usefulness after chitin is soaked into all heated 1～4.5 hour in 0.5～3 hour; (3) immediately the above-mentioned half-finished container of immersion chitin is taken out from microwave oven after heating stops and pour heated soak in it in the squeezing machine remaining soak solution of squeezing removal; (4) treat that putting into clear water after above-mentioned press for extracting juice goes the material of soak solution to naturally cool to 45 °～55 ℃ washs; till checking nondiscoloration with phenolphthalein indicator, (5) oven dry is crushed to required order number and is finished product.
Outstanding advantage of the present invention is: broken the insulation idea of industry technician's routine, and microwave oven heating behind the employing dipping by lye, not only method is simple; easy to operate, technical process is short, and required time is short; the work efficiency height; required equipment is few, so tooling cost can reduce greatly, the more important thing is the chitin after the processing; not only its ethanoyl can be sloughed more than 90%; and can control and regulate finished product viscosity by regulating heat-up time according to actual needs, and the quality product height, color and luster is good.
One of most preferred embodiment of the present invention is: chitin work in-process 200 gram of getting deproteinize and pigment put into fill concentration be 44% sodium hydroxide solution beaker fully submergence leave standstill and after 40 minutes beaker put into microwave oven and heated 3 hours; pour into immediately after the taking-up to press in the squeezing machine and remove to remain soak solution; dry leave standstill be cooled to temperature when being 50 ℃ of left and right sides with the clear water washing to check nondiscoloration with phenolphthalein indicator till; oven dry is pulverized then; slough 86.83% ethanoyl with potentiometric titrator mensuration, make about 170 grams of finished product.
Change as present embodiment
1, the concentration of soak solution can suitably change in the scope of permission;
2, soak time and heat-up time all can suitably changes in the scope of permission.
Claims (1)
1; a kind of novel method of deacetylation of chitin; it is characterized in that this method comprising the following steps: (1) to get the chitin work in-process, to put into concentration be that the sodium hydroxide solution of 40-55% soaks; (2) immersion treated that being put into microwave oven together with the container that soaks usefulness after chitin is soaked into all heated 1～4.5 hour in 0.5～3 hour; (3) immediately the above-mentioned half-finished container of immersion chitin is taken out from microwave oven after heating stops and pour heated soak in it in the squeezing machine remaining soak solution of squeezing removal; (4) treat that putting into clear water after above-mentioned press for extracting juice goes the material of soak solution to naturally cool to 45 °～55 ℃ washs; till checking nondiscoloration with phenolphthalein indicator, (5) oven dry is crushed to required order number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110327 CN1210867A (en) | 1998-07-02 | 1998-07-02 | New deacetylation of chitin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110327 CN1210867A (en) | 1998-07-02 | 1998-07-02 | New deacetylation of chitin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1210867A true CN1210867A (en) | 1999-03-17 |
Family
ID=5220387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110327 Pending CN1210867A (en) | 1998-07-02 | 1998-07-02 | New deacetylation of chitin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1210867A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005007702A1 (en) * | 2003-07-16 | 2005-01-27 | Institute Of Oceanology Chinese Academy Of Sciences | A chitin oligosaccharide compound and its preparation process |
| CN1300177C (en) * | 2003-05-07 | 2007-02-14 | 吴汉民 | Production process and apparatus of high quality chitosan |
| CN101077893B (en) * | 2006-05-24 | 2010-11-10 | 黄正华 | Method for extracting deacetylating chitin by fast hydrolyzing shrimp and crab carapace |
-
1998
- 1998-07-02 CN CN 98110327 patent/CN1210867A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300177C (en) * | 2003-05-07 | 2007-02-14 | 吴汉民 | Production process and apparatus of high quality chitosan |
| WO2005007702A1 (en) * | 2003-07-16 | 2005-01-27 | Institute Of Oceanology Chinese Academy Of Sciences | A chitin oligosaccharide compound and its preparation process |
| US7648969B2 (en) | 2003-07-16 | 2010-01-19 | Institute Of Oceanology Chinese Academy Of Sciences | Low molecular weight chitosan oligosaccharides and its preparation method |
| CN101077893B (en) * | 2006-05-24 | 2010-11-10 | 黄正华 | Method for extracting deacetylating chitin by fast hydrolyzing shrimp and crab carapace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |