CN101717451A - Method for enhancing substitution degree of hydroxypropyl starch - Google Patents
Method for enhancing substitution degree of hydroxypropyl starch Download PDFInfo
- Publication number
- CN101717451A CN101717451A CN200910231256A CN200910231256A CN101717451A CN 101717451 A CN101717451 A CN 101717451A CN 200910231256 A CN200910231256 A CN 200910231256A CN 200910231256 A CN200910231256 A CN 200910231256A CN 101717451 A CN101717451 A CN 101717451A
- Authority
- CN
- China
- Prior art keywords
- temperature
- hours
- substitution degree
- value
- starch
- 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.)
- Pending
Links
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention relates to a method for enhancing the substitution degree of hydroxypropyl starch, which is characterized by comprising the following technical steps of: 1, reducing the temperature of starch milk inside a reaction pot to be lower than 30 DEG C, adding 3-20 parts by weight of sodium hydroxide into 40 percent of the starch milk, and stirring at the temperature lower than 30 DEG C for 0.5-1 hours; 2, then adding 3-20 parts by weight of propylene epoxide, and stirring at the temperature lower than 30 DEG C for 0.5-1 hours; 3, after the step 2 is completed, heating to 45-50 DEG C, and keeping the temperature for 3-24 hours; and 4, regulating the pH value of residual medicine and ash content after washed by a swirler between 6 and 7 by 5 percent of a muriatic acid. The invention can enhance the utility ratio of the propylene epoxide and the substitution degree of a product and reduce the pollution, not only reduces the production cost, but also greatly reduces the environmental pollution.
Description
Technical field
The invention discloses the method that the kind in a kind of field of fine chemical improves the hydroxypropylated starch substitution value.
Background technology
The medicine utilization ratio is low in the hydroxypropylated starch production process at present, causes substitution value low, produces waste seriously, and pollution on the environment is more serious.
Summary of the invention
The purpose of this invention is to provide a kind of method that the hydroxypropylated starch substitution value is improved.Solution of the present invention is to it is characterized in that this method may further comprise the steps: 1, in the retort below the starch milk greenhouse cooling to 30 ℃, add sodium hydroxide 3-20 part in 40% starch milk, stirred 0.5-1 hour 30 ℃ of following temperature; 2, add propylene oxide 3-20 part again, stirred 0.5-1 hour 30 ℃ of following temperature; 3, the 2nd step was finished post-heating to 45-50 ℃ of insulation, picked up counting, and kept temperature 3-24 hour; 4, regulate pH value: through the medicine and the ash content of swirler wash residual, the hydrochloric acid with 5% is regulated pH value between the 6-7.
The invention has the beneficial effects as follows that the present invention can improve the utilization ratio of propylene oxide, increase the product substitution value, reduce and pollute.Both reduced production cost, can reduce pollution again greatly environment.
Embodiment
Embodiment 1, at first in the retort below the starch milk greenhouse cooling to 30 ℃, add 10 parts in sodium hydroxide, stirred 0.5 hour, added 10 parts of restir of propylene oxide then 0.5 hour,, be warming up to 45 ℃ of insulations 10 hours afterwards, through the medicine and the ash content of swirler wash residual, regulate pH value to 6.5 with 5% hydrochloric acid at last.
Embodiment 2, at first in the retort below the starch milk greenhouse cooling to 30 ℃, add 20 parts in sodium hydroxide, stirred 1 hour, added 20 parts of restir of propylene oxide then 1 hour,, be warming up to 50 ℃ of insulations 15 hours afterwards, through the medicine and the ash content of swirler wash residual, regulate pH value to 6.8 with 5% hydrochloric acid at last.
Embodiment recited above is described preferred implementation of the present invention; be not that design of the present invention and scope are limited; under the prerequisite that does not break away from design concept of the present invention; the various improvement that those skilled in the art make technical scheme of the present invention; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection all is documented in claims.
Claims (1)
1. method that the hydroxypropylated starch substitution value is improved, it is characterized in that this method may further comprise the steps: 1, in the retort below the starch milk greenhouse cooling to 30 ℃, in 40% starch milk, add sodium hydroxide 3-20 part, stirred 0.5-1 hour 30 ℃ of following temperature; 2, add propylene oxide 3-20 part again, stirred 0.5-1 hour 30 ℃ of following temperature; 3, the 2nd step was finished post-heating to 45-50 ℃ of insulation, picked up counting, and kept temperature 324 hours; 4, regulate pH value: through the medicine and the ash content of swirler wash residual, the hydrochloric acid with 5% is regulated pH value between the 6-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910231256A CN101717451A (en) | 2009-12-18 | 2009-12-18 | Method for enhancing substitution degree of hydroxypropyl starch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910231256A CN101717451A (en) | 2009-12-18 | 2009-12-18 | Method for enhancing substitution degree of hydroxypropyl starch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101717451A true CN101717451A (en) | 2010-06-02 |
Family
ID=42432094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910231256A Pending CN101717451A (en) | 2009-12-18 | 2009-12-18 | Method for enhancing substitution degree of hydroxypropyl starch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101717451A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768224B (en) * | 2010-01-22 | 2012-01-11 | 鲁郑全 | Preparation method of hydroxypropyl starch |
| CN102504035A (en) * | 2011-11-02 | 2012-06-20 | 山东福洋生物科技有限公司 | Method for increasing substitution degree of hydroxypropul starch |
| CN103509127A (en) * | 2012-06-30 | 2014-01-15 | 山东光大科技发展有限公司 | Slurry method production process of low-bath-ratio high-substituted hydroxypropyl starch ether |
| CN104072625A (en) * | 2013-03-26 | 2014-10-01 | 渔淮 | Novel preparation process for hydroxypropyl modified starch used for food |
| CN106496653A (en) * | 2016-11-28 | 2017-03-15 | 青岛中科星淀新材料科技有限公司 | A kind of preparation method of hydroxypropul starch/sodium alginate composite membrane |
| CN107880140A (en) * | 2017-11-30 | 2018-04-06 | 山东福洋生物科技有限公司 | The preparation method and production control method of a kind of hydroxypropul starch |
| CN110105457A (en) * | 2019-05-29 | 2019-08-09 | 河南省科学院同位素研究所有限责任公司 | A kind of mutual radiation method prepares the method and product of hydroxypropul starch |
-
2009
- 2009-12-18 CN CN200910231256A patent/CN101717451A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768224B (en) * | 2010-01-22 | 2012-01-11 | 鲁郑全 | Preparation method of hydroxypropyl starch |
| CN102504035A (en) * | 2011-11-02 | 2012-06-20 | 山东福洋生物科技有限公司 | Method for increasing substitution degree of hydroxypropul starch |
| CN103509127A (en) * | 2012-06-30 | 2014-01-15 | 山东光大科技发展有限公司 | Slurry method production process of low-bath-ratio high-substituted hydroxypropyl starch ether |
| CN104072625A (en) * | 2013-03-26 | 2014-10-01 | 渔淮 | Novel preparation process for hydroxypropyl modified starch used for food |
| CN106496653A (en) * | 2016-11-28 | 2017-03-15 | 青岛中科星淀新材料科技有限公司 | A kind of preparation method of hydroxypropul starch/sodium alginate composite membrane |
| CN107880140A (en) * | 2017-11-30 | 2018-04-06 | 山东福洋生物科技有限公司 | The preparation method and production control method of a kind of hydroxypropul starch |
| CN110105457A (en) * | 2019-05-29 | 2019-08-09 | 河南省科学院同位素研究所有限责任公司 | A kind of mutual radiation method prepares the method and product of hydroxypropul starch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101717451A (en) | Method for enhancing substitution degree of hydroxypropyl starch | |
| CN101507948B (en) | Cold condition fluorite flotation collector | |
| CN101386415A (en) | Method for preparing inorganic chemical product using waste produced by polycrystalline silicon | |
| CN110713447B (en) | Preparation method of p-methylthio benzaldehyde | |
| CN102603917B (en) | Method for extracting yeast glucosan by utilizing enzymatic method | |
| CN103626843B (en) | Impurity control method in a kind of aspartame production | |
| CN102875432B (en) | Preparation method of high-yield tiamulinfumarate | |
| CN102477099A (en) | Synthesis method of starch sodium octenyl succinate with high substitution degree | |
| CN102030367A (en) | Method for preparing high-purity titanium dioxide | |
| CN107216577A (en) | A kind of novel PVC liquid Ca-Zn composite heat stabilizer and preparation method for adding modified Nano carbon ball | |
| CN101323603B (en) | Preparation of 2-amido-1,3,4-thiadiazoles | |
| CN103087201A (en) | Production technology for preparing hyperviscous industrial-grade cellulose glycolate by means of half aqueous medium process | |
| CN103570522B (en) | A kind of production method of 99.5% sodium formiate | |
| CN102653564A (en) | Fine starch processing technique | |
| CN104726168A (en) | Lithium-zinc compound lubricant and preparation method thereof | |
| CN102372784A (en) | Method for producing high-purity edible starch | |
| CN103159675A (en) | Method for preparing 2, 3-pyridine acid | |
| CN101456914B (en) | Method for preparing hydrophobic starch | |
| CN103289825B (en) | Hydrolysis and hydrogenation process of palm oil and hydrolyzed crude acid | |
| CN104513197A (en) | 2-aminonicotinic acid synthetic method | |
| CN101724084A (en) | Method capable of keeping whiteness of heated oxidized starch | |
| CN111925340A (en) | Preparation process of methyl mercapto thiadiazole | |
| CN102370056B (en) | Method for preparing chitooligosaccharides used for feed by enzymatic hydrolysis | |
| CN102504035A (en) | Method for increasing substitution degree of hydroxypropul starch | |
| CN102554251B (en) | A kind of technique of washing silver powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Leida Document name: Notification that Application Deemed not to be Proposed |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20100602 |