2024-04-22- readings1. Basic rules of CMC manufacturing (1) Intake quota (solvent technique, computed per large amount of product or service): lint 62.5 kg ethanol, 317.2 kg alkali (44.8%6), 11.1kg monochloroacetic acid solution, 35.4kg toluene , 310.2 kg, (2) Manufacturing theory and approach? Alkaline cellulose is made from cellulose and sodium hydroxide aqueous remedy or salt hydroxide ethanol aqueous answer, then reacted with monochloroacetic acid or salt monochloroacetate to have a crude merchandise, which is The alkaline item is dried up and pulverized into commercially offered carboxymethylcellulose (sodium sodium vine). The crude product is then neutralized, rinsed, and sodium chloride is taken away, then dried up and pulverized to acquire enhanced sodium carboxymethylcellulose. The substance formulation is just as adheres to: (C6H904-oH)4+nNaon-(C6H904-ONa)n+nH2o (3) Process outline: Grind the cellulose and suspend it in ethanol, add more 30rain of alkali solution and mix continuously, ensure that it stays at 28-32℃, and funky it to reduced heat, include monochloroacetic acidity, heat to 55°C for 1.5h, and take action for 4h add more acetic acid to counteract the reaction mix, separate the solvent to get a crude product, and wash the crude merchandise twice with methanol in a washing devices made up of a blender along with a centrifuge. , dehydrated to get the product or service. CMC solution has high viscosity and temperatures changes is not going to trigger gelation. 2. Production technological innovation of ultra-substantial viscosity sodium carboxymethyl cellulose. A generation modern technology of super-higher viscosity sodium carboxymethyl cellulose. Actions: (1) Put cellulose, alkali, and ethanol into an alkalization kneader in amount, perform alkalization under nitrogen security, then include the etherifying broker chloroacetic acidity ethanol strategy to conduct preliminary etherification of your fabric (2) Deliver the above resources into the etherification kneader to manage the temperatures and reaction time to perform etherification effect. Once the etherification impulse is carried out, deliver the types of materials in to the cleansing reservoir (3) Wash the etherification response materials with dilute ethanol strategy to get rid of the sea salt produced by the reaction. Make your purity of your merchandise achieve a lot more than 99.5Percent (4) Then centrifugally click the content, transfer the strong substance for the stripping tower, and extract the ethanol solvent in the fabric throughout the stripping tower (5) The content goes into the shake through the stripper The fluidized mattress is used for drying to eliminate unwanted humidity, and after that crushed to have the product. The advantage is that the process is ideal as well as the product or service good quality index can attain sort B with a viscosity of 1Percent > 10000mpa. S, purity >99.5Percent. Carboxymethyl cellulose is surely an ether derivative obtained by chemical substance customization of natural cellulose. The carboxyl teams around the molecular sequence can form salts. The most common sodium may be the salt salt, sodium carboxymethylcellulose (Na-CMC), generally called CMC, which happens to be an ionic ether. CMC can be a highly water powder with a white colored or light-weight yellow visual appeal, bland, odorless, no-dangerous, no-flammable, no-mouldy, and dependable to lighting and also heat.
