As a vital fatty alcohol, Stearyl Alcohol is widely utilized in chemical study, everyday chemicals, fabrics, printing and dyeing, medicine, cosmetics and other sectors. It is a resources for producing plastic additives, surfactants, emulsifiers and numerous ingredients.
1. Prepare Stearyl Alcohol polyoxyethylene ether.
Stearyl alcohol polyoxyethylene ether is a good dye leveling representative with outstanding emulsification and leveling properties, excellent cozy thickness and biodegradability. The product is nonionic in alkaline and neutral media, and cationic in acidic media. It can be made use of as a leveling representative for acidic complex dyes to minimize the amount of sulfuric acid in the color bathroom and reduce solid damages to materials. It can also be used as a leveling agent for neutral dyes and vat dyes, and as a removing representative for woollen and nylon fabrics.
The prep work technique utilizes Stearyl Alcohol and ethylene oxide as resources and accomplishes polymerization reaction in the visibility of a catalyst; the weight ratio of the stearyl alcohol and ethylene oxide is 1:0.145 ~ 3.05; the driver is strong methanol Any one or a blend of greater than one salt, salt methoxide methanol service, KOH, NaOH, and so on, is included a quantity of 0.05 to 0.6% by weight of the ready stearyl polyoxyethylene ether. The above technique fairly figures out the raw material ratio, driver dosage, polymerization response temperature level, time and various other process specifications and problems. The reaction problems are light, easy to regulate, and have reduced tools needs. The gotten stearyl polyoxyethylene ether has light shade and stable performance. The variety of flexible molecular weight is huge, and the dye leveling representative product with the called for efficiency can be obtained by changing the molecular weight, which can meet the needs of different celebrations.
2. Preparation of maleic anhydride reactive emulsifier.
It includes the adhering to actions: first prepare an epoxypropyltrimethylammonium chloride intermediate, mix epichlorohydrin and trimethylamine, and respond at 25-30 ° C for 4-5 hours to prepare epoxypropyltrimethylammonium chloride. Ammonium chloride intermediate; prepare stearyl maleic anhydride intermediate, mix maleic anhydride and stearyl alcohol, and respond at 70-75 ° C for 3 to 4 hours to prepare stearyl maleic anhydride. Intermediate; warmth the stearyl maleic anhydride intermediate ready over to 110-115 ° C, and slowly add the epoxypropyltrimethylammonium chloride intermediate to the stearyl maleic anhydride intermediate., regulate the enhancement time to 3 to 5 hours, and begin to warm up after the addition is finished. When the product temperature level reaches 120 ° C, the temperature level is maintained continuous for 1 hour to obtain a maleic anhydride-type reactive emulsifier.
3. Prep work of stearyl acrylate.
First include a polymerization prevention of 0.3 ~ 0.8% of stearyl alcohol to Stearyl Alcohol, warmth it to entirely dissolve it, and afterwards include 1.2 ~ 1.5 times the molar quantity of stearyl alcohol to acrylic acid and 0.5 ~ 1.2% of stearyl alcohol. Driver, mix and blend; warm the blend to 60 ~ 120 ℃, reflux for 2 ~ 3 hours, different the water created by the reaction, remain to raise the temperature to 130 ~ 140 ℃, maintain the response for 2 ~ 4 hours, and boil down under decreased stress to remove the unreacted components. of acrylic acid and recurring water, and then wash the response product with a caustic antacids aqueous option, and then wash it with water until neutral; ultimately, vacuum cleaner dry it at 40 ° C for 6 to 8 hours to get waxy solid stearyl acrylate.
Today development has the advantages of fast reaction price, high reaction selectivity, brief response time, high ester yield, and easy release of item water. It does not make use of an entrainer and prevents major contamination issues caused by hazardous solvents. It belongs to Clean manufacturing procedure.
