Fluorescent Brightener BC
Fluorescent Brightener BC
CAS:
Molecular Formula: C24H16N3NaO3S
Fluorescent Brightener BC - Names and Identifiers
| Name | Fluorescent Brightener BC |
| Synonyms | fluorescent whitening agent BC |
Fluorescent Brightener BC - Physico-chemical Properties
| Molecular Formula | C24H16N3NaO3S |
| Molar Mass | 449.45691 |
| Physical and Chemical Properties | Chemical quality This product is a light yellow powder, dissolved in water and has blue fluorescence properties, similar to VBL, but the fluorescence intensity is lower than VBL. |
| Use | Mainly used for cotton fiber, rayon, rayon and pulp and other neutral dyeing bath whitening post-treatment. |
Fluorescent Brightener BC - safety
Open Data Verified Data
This product can be managed according to general industrial chemicals. When using it, gloves and protective glasses should be worn to avoid direct contact with the skin and eyes. If it gets on the skin, rinse with water and soap. Place in a cool and dry warehouse to prevent exposure to sunlight and rain.
Last Update：2023-10-20 08:40:34
Fluorescent Brightener BC - Preparation method
Open Data Verified Data
1. Put 142 portions of DSD acid and 192 portions of water into a reactor, heat to 90 ° C, neutralize with soda ash, add 14 portions of activated carbon for decolorization, filter to remove carbon, and prepare the filtrate for use.
2. Put 140 parts of melamine and 200 parts of water into another reactor, cool to 0~5 ℃, add a small amount of flat O, and then slowly drip it into the aforementioned DSD sodium acid aqueous solution. Adjust the pH value to 4~5 with pure alkali solution at any time for the first condensation. After the first condensation is completed, raise the temperature to 40-50 ℃, add 83 parts of sodium p-aminobenzenesulfonate, adjust the pH value to around 5 with soda ash solution, and proceed with the second condensation. After the second condensation is completed, add 211 parts of ammonia water (20%) at 110-120 ℃ for the third condensation. Then filter while it is hot, acidify the filtrate with hydrochloric acid, cool and crystallize, filter, knead and dry the crystals with baking soda, and then mix with an appropriate amount of sodium sulfate to obtain the finished product.
Last Update：2024-01-02 23:10:35
Fluorescent Brightener BC - Production method
P> put 142 parts of DSD acid and 192 parts of water into the reaction kettle, heat to 90 ℃, neutralize with soda ash, add 14 parts of activated carbon to decolorize, filter to remove charcoal, and the filtrate is ready for use.
Put 140 parts of melamine and 200 parts of water into another upper reaction kettle, cool to 0~5 ℃, add a small amount of flat O, slowly drop into the above-mentioned sodium DSD solution, adjust the pH value to 4~5 with soda ash solution at any time, and carry out the first condensation. After the first condensation is completed, the temperature is raised to 40~45 ℃, 83 parts of sodium p-aminobenzene sulfonate are added, the pH value is adjusted to about 5 with soda ash solution, and the second condensation is carried out. When the second condensation is completed, 211 parts of ammonia (20%) are added to carry out the third condensation at 110~120 ℃. Then filter while hot, the filtrate is acid-precipitated with hydrochloric acid, cooled and crystallized, filtered, kneaded and dried the crystals with baking soda, and then mixed with an appropriate amount of sodium sulfate to obtain the finished product.
Put 140 parts of melamine and 200 parts of water into another upper reaction kettle, cool to 0~5 ℃, add a small amount of flat O, slowly drop into the above-mentioned sodium DSD solution, adjust the pH value to 4~5 with soda ash solution at any time, and carry out the first condensation. After the first condensation is completed, the temperature is raised to 40~45 ℃, 83 parts of sodium p-aminobenzene sulfonate are added, the pH value is adjusted to about 5 with soda ash solution, and the second condensation is carried out. When the second condensation is completed, 211 parts of ammonia (20%) are added to carry out the third condensation at 110~120 ℃. Then filter while hot, the filtrate is acid-precipitated with hydrochloric acid, cooled and crystallized, filtered, kneaded and dried the crystals with baking soda, and then mixed with an appropriate amount of sodium sulfate to obtain the finished product.
Last Update：2024-04-10 22:29:15
