CN112552825B - Method for reducing gelatin ash content and improving gelatin light transmittance in membrane concentration stage - Google Patents
Method for reducing gelatin ash content and improving gelatin light transmittance in membrane concentration stage Download PDFInfo
- Publication number
- CN112552825B CN112552825B CN202011407202.XA CN202011407202A CN112552825B CN 112552825 B CN112552825 B CN 112552825B CN 202011407202 A CN202011407202 A CN 202011407202A CN 112552825 B CN112552825 B CN 112552825B
- Authority
- CN
- China
- Prior art keywords
- gelatin
- membrane concentration
- light transmittance
- ash content
- solution
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09H—PREPARATION OF GLUE OR GELATINE
- C09H3/00—Isolation of glue or gelatine from raw materials, e.g. by extracting, by heating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09H—PREPARATION OF GLUE OR GELATINE
- C09H3/00—Isolation of glue or gelatine from raw materials, e.g. by extracting, by heating
- C09H3/02—Purification of solutions of gelatine
Abstract
The invention provides a membrane concentration method for preparing gelatin and application thereof. According to the membrane concentration method provided by the invention, ammonia water and/or ammonia gas are/is used for adjusting the pH value during membrane concentration, so that the ash content of gelatin can be reduced, and the light transmittance of the gelatin can be improved.
Description
Technical Field
The invention belongs to the technical field of gelatin preparation, relates to a membrane concentration method for preparing gelatin and application thereof, and particularly relates to a method for reducing gelatin ash content and improving gelatin light transmittance in a membrane concentration stage.
Background
The quality of the gelatin is classified into a special grade glue, a first grade glue, a second grade glue, a third grade glue, a fourth grade glue and a fifth grade glue by mainly using indexes of viscosity, freezing force, ash content and light transmittance, the light transmittance of the gelatin is an important index in technical indexes of the gelatin, and the reduction of the ash content of the gelatin and the improvement of the light transmittance of the gelatin are inevitable trends along with the increasing requirements on the ash content and the light transmittance of the gelatin at present.
The light transmittance of the gelatin depends on the properties of raw materials and the production process conditions of the gelatin, and is closely related to the conditions of liming, neutralization, water gel extraction, filtration and the like. In the current gelatin preparation process, filter aids commonly used in the gelatin filtration process comprise activated carbon, filter cotton, diatomite and the like, and a certain filter medium is adopted to remove impurities in a gelatin solution, reduce the ash content of gelatin and improve the light transmittance of gelatin, so that the conventional method for improving the light transmittance of gelatin adopted by technicians at present is to explore the performance parameters of the filter aids to improve the light transmittance of gelatin.
It is desirable to provide a new method for reducing gelatin ash and increasing gelatin transmittance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for reducing gelatin ash content and improving gelatin light transmittance in a membrane concentration stage and application thereof. According to the method provided by the invention, in the membrane concentration stage, the ammonia water and/or ammonia gas are/is used for adjusting the pH value of the gelatin liquid, so that the ash content of the gelatin can be reduced, and the light transmittance of the gelatin can be improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a membrane concentration method for preparing gelatin, comprising adjusting the pH of a gelatin solution using ammonia gas and/or ammonia water as a pH adjuster.
The invention discovers that when membrane concentration is carried out, if alkali liquor such as sodium hydroxide is used for adjusting the pH value, weak acid salt is generated by reaction, the ash content of the gelatin can be directly increased, and the light transmittance of the gelatin is reduced; the pH value of the gelatin solution is adjusted by adopting ammonia gas and/or ammonia water, so that the acidity of the gelatin solution can be neutralized, and the gelatin solution is crosslinked with the unique structure of gelatin, so that the pH value of the gelatin can be adjusted without changing the property of the gelatin. Therefore, compared with the prior art, the method for membrane concentration provided by the invention can reduce the ash content of the gelatin liquid, improve the light transmittance of the gelatin liquid, and further improve the quality of gelatin; meanwhile, the pH value is adjusted by adopting ammonia gas and/or ammonia water, compared with the solution of sodium hydroxide and the like, the method is simpler and has lower cost.
In order to ensure that the gelatin cement meets the requirements of membrane concentration, the pH adjusting agent adjusts the pH of the gelatin cement to 5.5-5.8, e.g. 5.6, 5.7, 5.8.
The present invention limits the amount of pH adjuster to be added by limiting the final pH value.
As one technical scheme of the invention, the pH regulator is ammonia gas, and the adding rate of the ammonia gas is 1.1-1.4kg/h, such as 1.2kg/h, 1.3kg/h and the like.
In one embodiment of the present invention, the pH adjuster is ammonia water, and the concentration of the ammonia water is 20 to 30%, for example, 22%, 25%, 28%, etc.
As a preferable technical scheme of the invention, the adding speed of the ammonia water is 5-8L/h, such as 5.5L/h, 6L/h, 7L/h and the like.
The concentration of the gelatin glue solution is 3-8%, such as 4%, 5%, 6%, 7% and the like.
In a second aspect, the present invention provides the use of the membrane concentration process of the first aspect in the preparation of gelatin.
In a third aspect, the present invention provides a process for the preparation of gelatin, said process comprising membrane concentration in a membrane concentration stage using the process of the first aspect.
As a preferred technical solution of the present invention, the method for preparing gelatin comprises: the gelatin is obtained by sequentially carrying out screening, pickling, liming, neutralization, gelatin extraction, filtration, ion exchange, membrane concentration, sterilization and post-treatment on raw materials for gelatin.
The preparation method of the gelatin comprises the processes of sieving, pickling, liming, neutralizing and the like, and can use the conventional method in the field.
In a fourth aspect, the present invention provides the gelatin prepared by the preparation method of the third aspect.
The method for concentrating the gelatin film can reduce the ash content of gelatin glue solution and improve the light transmittance of the gelatin glue solution, so that the finally obtained gelatin ash content is lower, the light transmittance is higher and the quality of the gelatin is higher by using the method for concentrating the gelatin film in the process of preparing the gelatin, and the method for concentrating the gelatin film is simple in operation and low in cost.
In a preferred embodiment of the present invention, the gelatin has an ash content of 0.1 to 0.6%, preferably 0.1 to 0.2%, e.g., 0.12%, 0.15%, 0.18%, etc., and the gelatin has a light transmittance of 82 to 90%, preferably 85 to 90%, e.g., 86%, 87%, 88%, 89%, etc.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the membrane concentration method provided by the invention, ammonia gas and/or ammonia water are/is used as a pH regulator, so that the ash content of the glue solution can be reduced, and the light transmittance of the glue solution is improved;
(2) furthermore, in the process of preparing the gelatin, the method for membrane concentration provided by the invention can ensure that the finally obtained gelatin has lower ash content, higher light transmittance and higher gelatin quality, and the method for membrane concentration provided by the invention has simple operation method and lower cost.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the specific embodiments are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
This example provides a method for reducing gelatin ash and increasing gelatin transmittance during the membrane concentration stage.
(1) Placing an ammonia gas bottle on an electronic scale and arranging the ammonia gas bottle beside a membrane concentration system;
(2) the gelatin glue solution with the concentration of 5 percent after ion exchange enters a membrane concentration system, ammonia gas is added by using a special ammonia gas pipe while the gelatin solution is fed, the adding speed of the ammonia gas is controlled to be 1.25kg/h by controlling the weight reduced in unit time, and the pH value of the gelatin glue solution is 5.5-5.8 at the moment, and then membrane concentration is carried out.
Example 2
This example provides a method for reducing gelatin ash and increasing gelatin transmittance during the membrane concentration stage.
(1) Placing an ammonia gas bottle on an electronic scale and arranging the ammonia gas bottle beside a membrane concentration system;
(2) the gelatin glue solution with the concentration of 3 percent after ion exchange enters a membrane concentration system, ammonia gas is added by using a special ammonia gas pipe while the gelatin solution is fed, the adding speed of the ammonia gas is controlled to be 1.4kg/h by controlling the weight reduced in unit time, and the pH value of the gelatin glue solution is 5.5-5.8 at the moment, and then membrane concentration is carried out.
Example 3
This example provides a method for reducing gelatin ash and increasing gelatin transmittance during the membrane concentration stage.
(1) Ammonia water with the concentration of 30% is arranged beside the membrane concentration system;
(2) and (3) feeding the gelatin solution with the concentration of 5% after ion exchange into a membrane concentration glue storage barrel, feeding the gelatin solution into a membrane concentration system while feeding the gelatin solution into the glue storage barrel, simultaneously adding ammonia water into the glue storage barrel at the flow rate of 6L/h by using a peristaltic pump, maintaining the pH value of the gelatin solution in the glue storage barrel to be 5.5-5.8, and then carrying out membrane concentration.
Example 4
This example provides a method for reducing gelatin ash and increasing gelatin transmittance during the membrane concentration stage.
(1) Ammonia water with the concentration of 20% is arranged beside the membrane concentration system;
(2) the gelatin solution with concentration of 8% after ion exchange enters a membrane concentration glue storage barrel, the gelatin solution enters a membrane concentration system while entering the glue storage barrel, meanwhile, ammonia water is added into the glue storage barrel at the flow rate of 8L/h by using a peristaltic pump, the pH value of the gelatin solution in the glue storage barrel is maintained to be 5.5-5.8, and then membrane concentration is carried out.
Comparative example 1
The comparative example provides a method for adjusting the pH value of a glue solution by using a NaOH solution in the membrane concentration stage.
(1) Arranging a NaOH solution with the content of 30% as an alkali adding device beside the membrane concentration system;
(2) and (3) feeding the gelatin solution with the concentration of 5% after ion exchange into a membrane concentration glue storage barrel, feeding the gelatin solution into a membrane concentration system while feeding the gelatin solution into the glue storage barrel, and simultaneously adding 30% NaOH solution into the glue storage barrel by using a peristaltic pump at the flow rate of 9.8L/h to maintain the pH value of the gelatin solution in the glue storage barrel to be 5.5-5.8.
Performance analysis
Gelatin was prepared using the methods provided in examples 1-4 and comparative example 1 on the same batch of bone particles (5-7 mm, 7-15mm, 15-17mm in size), the remaining steps (pickling, neutralization, gelatin extraction, filtration, etc.) were the same, and the gelatin obtained in examples and comparative example was tested for ash content and light transmittance, respectively, and the results are shown in table 1:
TABLE 1
| Sample (I) | Ash content% | Transmittance (a) |
| Example 1 | 0.12 | 87 |
| Example 2 | 0.13 | 88 |
| Example 3 | 0.14 | 87 |
| Example 4 | 0.13 | 86 |
| Comparative example 1 | 0.8 | 82 |
The embodiment and the performance test show that in the process of preparing the gelatin, the method for concentrating the film provided by the invention can ensure that the finally obtained gelatin has lower ash content, higher light transmittance and higher gelatin quality, wherein the ash content of the gelatin is 0.1-0.2%, the light transmittance is 85-88%, and the optimal light transmittance can reach 88%.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. A method for reducing gelatin ash content and improving gelatin light transmittance in a membrane concentration stage is characterized by comprising the steps of adjusting the pH value of a gelatin liquid solution by taking ammonia gas and/or ammonia water as a pH regulator, wherein the concentration of the gelatin liquid solution is 3-8%, and the pH regulator is used for adjusting the pH value of the gelatin liquid solution to be 5.5-5.8;
when the pH regulator is ammonia gas, the adding rate of the ammonia gas is 1.1-1.4 kg/h;
when the pH regulator is ammonia water, the concentration of the ammonia water is 20-30%; the adding rate of the ammonia water is 5-8L/h.
2. Use of the process of claim 1 for the preparation of gelatin.
3. A process for the preparation of gelatin, characterized in that the process according to claim 1 is used in the membrane concentration stage; the preparation method of the gelatin comprises the following steps: the gelatin is obtained by sequentially carrying out screening, pickling, liming, neutralization, gelatin extraction, filtration, ion exchange, membrane concentration, sterilization and post-treatment on raw materials for gelatin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407202.XA CN112552825B (en) | 2020-12-04 | 2020-12-04 | Method for reducing gelatin ash content and improving gelatin light transmittance in membrane concentration stage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407202.XA CN112552825B (en) | 2020-12-04 | 2020-12-04 | Method for reducing gelatin ash content and improving gelatin light transmittance in membrane concentration stage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112552825A CN112552825A (en) | 2021-03-26 |
| CN112552825B true CN112552825B (en) | 2022-06-07 |
Family
ID=75048141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011407202.XA Active CN112552825B (en) | 2020-12-04 | 2020-12-04 | Method for reducing gelatin ash content and improving gelatin light transmittance in membrane concentration stage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112552825B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976563A (en) * | 2012-12-19 | 2013-03-20 | 山东名科环保工程有限公司 | Treatment method of gelatin wastewater |
| CN108185403A (en) * | 2017-12-27 | 2018-06-22 | 成都经典明胶有限公司 | A kind of edible gelatin production technology |
| CN109337587A (en) * | 2018-11-29 | 2019-02-15 | 沾化恒鑫工业科技有限公司 | A kind of method of alkaline process production pigskin gelatin |
-
2020
- 2020-12-04 CN CN202011407202.XA patent/CN112552825B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976563A (en) * | 2012-12-19 | 2013-03-20 | 山东名科环保工程有限公司 | Treatment method of gelatin wastewater |
| CN108185403A (en) * | 2017-12-27 | 2018-06-22 | 成都经典明胶有限公司 | A kind of edible gelatin production technology |
| CN109337587A (en) * | 2018-11-29 | 2019-02-15 | 沾化恒鑫工业科技有限公司 | A kind of method of alkaline process production pigskin gelatin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112552825A (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110304762B (en) | Method for treating printing and dyeing wastewater by combining adsorption-flocculation-membrane separation | |
| CN104773885A (en) | Comprehensive treatment method of coking desulfurization waste liquid | |
| CN112552825B (en) | Method for reducing gelatin ash content and improving gelatin light transmittance in membrane concentration stage | |
| CN112499827B (en) | Method for treating waste brine containing vanadium, chromium and titanium | |
| CN1982230A (en) | Method for removing cloud point of sea water drasticlly and producing acid waste-water neutralizer | |
| CN112694413A (en) | Method for extracting L-homoserine from fermentation liquor | |
| CN112441664A (en) | Composite carbon source sewage treatment agent and preparation method thereof | |
| CN112569635A (en) | Method for removing metal ions in ionic liquid system | |
| CN115215949B (en) | Sodium hyaluronate and purification method thereof | |
| CN110746273A (en) | Purification process of biodiesel byproduct glycerol | |
| CN101550063A (en) | Method for purifying ultra-purity absolute ethyl alcohol | |
| CN114657567A (en) | Corrosion inhibitor and preparation method and application thereof | |
| CN113429080A (en) | Process for treating wastewater generated in sulfamonomethoxine production | |
| CN112095025A (en) | Method for removing silicon and phosphorus from blank roasting-ammonia leaching vanadium liquid | |
| CN112811442A (en) | Process and system for refining salt by using high-salinity wastewater | |
| CN111646638A (en) | Method for deep treatment and desalination of sucralose wastewater | |
| CN106554374B (en) | A method of purification prepares vistamycin from ribostamycin fermentation liquid | |
| CN103408638A (en) | Preparation technology for vancomycin crystals | |
| CN114805635B (en) | Co-production process of desalted protein powder and chondroitin sodium sulfate | |
| CN108911415A (en) | Recycling processing method containing Vulkacit M wastewater | |
| CN116693886A (en) | Boric acid esterification crosslinked sodium carboxymethyl cellulose hydrogel | |
| CN214183017U (en) | One set of device of preparation acid type sophorolipid | |
| CN103130280B (en) | Method for improving quality of industrial chromic chloride | |
| CN103011504B (en) | Cyclic utilization method of fermentation wastewater produced during industrial production of nosiheptide | |
| CN116282087A (en) | Technological method for preparing battery-grade lithium carbonate from sulfate type salt lake brine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |