CATIONIC STARCH
Product Description
Cationic starch is usually produced by using a quaternary ammonium cationic etherifying agent, which is reacted under a catalyst with the cationic starch is usually made by reacting quaternary The most typical cationic etherifying agent is 3-chloro-2-hydroxypropyltrimethylammonium chloride. ammonium chloride. Under alkaline conditions, the cationic etherifying agent first forms an epoxide and then reacts with the hydroxyl of the dehydrated grape unit in the starch molecule.
Then it reacts with the hydroxyl group on the dehydrated grape unit of the starch molecule to form cationic starch.
The main characteristics of cationic starch:
1. Low pasting temperature, clear and transparent paste, good fluidity, longer placement time;
2. It can adsorb with negatively charged fibers and fillers, thus improving the retention rate of fine fibers and Reduce energy consumption;
3. It can make starch, fiber, and filler flocculation phenomenon, reduce pollution and energy consumption.
Application
1. Paper industry: Cationic starch is one of the most important chemicals in the paper industry, where it is mainly used in the bonding and sizing of pulp. By using cationic starch, the appearance, strength and water resistance of paper can be improved and the consistency of pulp can be increased.
2. Gypsum board industry: It is mainly used in the production of gypsum board to improve the hardness and strength of gypsum board, and also to improve the waterproof property of gypsum board.
3. petroleum industry: in petroleum industry, cationic starch can be used as drilling fluid and oil recovery additives to improve oil recovery efficiency and protect oil and gas layers.
4. Sewage treatment: Cationic starch can be used as flocculant and settling agent in sewage treatment, effectively removing suspended matters and harmful substances in sewage.
5. Agriculture: In agriculture, cationic starch can be used as soil conditioner and pesticide synergist to improve soil fertility and the utilization rate of pesticides.
6. Personal care products: Cationic starch can also be used in the production of personal care products, such as shampoos, shower gels and cosmetics, to improve the moisturizing and stability of the products.
General properties:
1. It can improve the breakage resistance, tension resistance, folding resistance, lint resistanceand many other physical properties of paper.
2. Improve the sizing effect of rosin and alumina.
3. Improve the water filtration property of pulp and papermaking speed.
4. improve the retention rate of various dyes and fillers (such as white clay, titanium dioxide, calcium carbonate, etc.), thus reducing the cost of papermaking. Retention rate, so as to reduce the cost of papermaking.
5. as a fixing agent and emulsifying agent for latex, synthetic resin, alkyl vinyl ketone dimer, etc., and neutral sizing agent. It is also effective as a fixing and emulsifying agent for latex, synthetic resins, alkyl vinyl ketone dimers, etc., and as a dispersing agent for neutral sizing agents.
6. Reduces the degree of wastewater pollution (BOD) and helps to eliminate public hazards.
Corrugated paper manufacturing
Usage:
In the production process of corrugated paper, cationic starch is mainly used to improve the properties of paper such as tensile strength, breakage resistance, water resistance and sizing. The following is how to use cationic starch in the production of corrugated
paper:
1. Adding cationic starch: Add cationic starch to the pulping system according to the required additive amount, and mix it with raw materials.
2. Preparation of pulp: In the pulping system, the raw materials are ground into pulp using a grinder, and then screened, bleached and other treatments are carried out to obtain high-quality pulp.
3. Adding cationic starch solution: Dissolve cationic starch in the right amount of water to prepare a certain concentration of cationic starch solution. On the corrugator, the cationic starch solution is uniformly applied to the paper surface by spraying or coating.
4. Drying and calendering: Through drying and calendering processes, the surface of the paper is made smoother and denser to improve the quality and performance of the paper.
5. Testing and Packaging: The corrugated paper produced is tested for quality, such as tensile strength, breakage resistance, water resistance and other indicators. Qualified products are packaged for transportation and sale.
Printing paper manufacturing
Amount added: 2%-6%
Usage:
1. Preparation of cationic starch solution: Add cationic starch to the appropriate amount of water according to the required additive amount, stir well and prepare a certain concentration of cationic starch solution.
2. Paper sizing: Apply the cationic starch solution evenly to the paper surface by spraying or coating before the paper enters the press section. This helps to improve the sizing and ink absorption of the paper.
3. Control Parameters: Parameters such as cationic starch concentration, application volume and coating volume, as well as process parameters such as paper temperature, humidity and press pressure are controlled to ensure the quality and performance of the paper.
4. Drying and Finishing: After sizing, the paper enters the drying section for drying and then finishing to ensure that the surface of the paper is flat and free of defects.
5. quality testing and packaging: the production of printing paper quality testing, such as sizing, smoothness, water resistance and other indicators of the test. Qualified products are packaged for transportation and sale.
During the whole process, the production environment should be kept hygienic and clean to avoid the influence of impurities and pollutants on the quality of paper. At the same time, equipment parameters should be regularly checked and adjusted to ensure that the quality of the paper produced is stable.
Plasterboard industry:
Additive amount: 0.5%-3% (For enhancing strength: 1%-2%.mprovement of waterproof performance: 0.5%-1%)
Usage:
1. Determine the amount to be added: In the production of gypsum board, the amount of cationic starch added should be adjusted according to the production needs. Usually, the added amount of cationic starch accounts for 1%\~2% of the amount of gypsum. Too much addition may lead to the decline of material properties, while too little addition may not achieve the desired effect.
2. Preparation of cationic starch solution: Before using cationic starch, it needs to be mixed withappropriate amount of water to prepare a solution. Slowly add the cationic starch into the mixer, and at the same time add the appropriate amount of water, and keep mixing until a uniform solution is formed. Take care to control the stirring speed and time to avoid bubbles or precipitation.
3. Add cationic starch solution: Add the prepared cationic starch solution into the gypsum slurry. In the process of adding, it should be ensured to be evenly mixed to avoid the phenomenon of localized over-concentration or over-dilution. Mechanical mixing or manual mixing can be used to ensure uniform mixing.
4. Control the mixing time: the mixing time has a certain impact on the quality of gypsum board. Too short mixing time may lead to the cationic starch and gypsum slurry is not fully integrated, while mixing time is too long may cause a decline in material properties. Therefore, it is necessary to control the mixing time to ensure the uniform mixing of cationic starch and gypsum slurry.
5. Aging and processing: After the mixed gypsum slurry is poured into the paper-faced gypsum board machine, it needs to go through a certain aging time, so that the gypsum hydration reaction is complete and the strength of the paper-faced gypsum board is improved. After aging, the paper-faced gypsum board can be processed by sawing and punching as needed. Pay attention to control the processing parameters to avoid affecting the performance of paper-faced
gypsum board.
6. Quality inspection and packaging: The finished paper-faced gypsum board needs to undergo strict quality inspection to ensure that it meets the production requirements and relevant standards. Qualified products can be packaged for transportation and sale. Packaging should use appropriate materials and methods to ensure the protection and beauty of paper-faced gypsum board.
oil industry:
Amount added: 1-3%
Usage:
1. Determine the additive amount: according to the application scenario and demand, determine the additive amount of cationic starch. For example, in petroleum drilling mud, the adding amount is usually 0.5%\~1%; in petroleum fracturing fluid, the adding amount is usually 1%\~2%; in petroleum emulsion system, the adding amount is within the range of 1%\~3%.
2. Preparation of cationic starch solution: Mix cationic starch with appropriate amount of water to prepare a uniform solution. Stirrer or manual stirring can be used to control the stirring speed and time to avoid bubbles or formation of precipitation.
3. Mixing and stirring: Mix the prepared cationic starch solution with the petroleum system and maintain proper stirring or circulation to ensure that the cationic starch is uniformly dispersed in the system. The time and intensity of stirring or circulation should be based on the specific system and application requirements.
4. Maturing and aging: The mixed petroleum system needs to undergo a certain maturing time so that the cationic starch can fully react and combine with other components in the system. The aging time should depend on the specific system and application requirements, and generally
needs to be carried out under certain temperature and pressure conditions. Also, the aging process is necessary to further improve the stability and performance of the system.
5. Use and storage: After the maturation and aging process, the petroleum system can be put into use. In the process of use, attention should be paid to controlling the use amount and rheology, and adjusted according to the actual situation. The unused portion should be stored in a cool, dry and well-ventilated place, avoiding direct sunlight and high temperature. Meanwhile, the stored petroleum system should be inspected regularly and any abnormality should be dealt
with promptly.
Wastewater treatment industry:
Amount added: 0.5-1%
Usage:
Preparation stage
1. Determine the required amount of cationic starch according to the requirements of sewage treatment and test results.
2. prepare the required cationic starch, make sure its quality is qualified and free of impurities.
3. Prepare the required equipment and tools, such as stirrers, meters and so on.
Add cationic starch
1. Add the calculated cationic starch into the cesspool, and may use the stirrer for even mixing.
2. According to the actual situation, it may be necessary to properly adjust the amount of cationic starch added to achieve the best treatment effect.
Mixing and stirring
1. Turn on the stirrer, so that the cationic starch and sewage are fully mixed. The mixing speed and time should be determined according to the actual situation to ensure that the cationic starch is evenly dispersed in the sewage.
2. Observe the change of sewage, such as flocculation, thickening and other phenomena, indicating that the cationic starch plays a role.
Reaction and treatment
1. keep stirring state, let the cationic starch react with the suspended matter and organic matter in the sewage. The reaction time should be determined according to the actual situation, generally need a certain amount of time to achieve the expected results. 2.
2. in the reaction process, should pay attention to observe the changes of the sewage, such as precipitation, floating and other phenomena, should promptly adjust the stirring speed and direction to promote the reaction.
3. According to the treatment requirements, it may be necessary to carry out subsequent treatment steps, such as filtration, separation and so on.
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