Nanjing Chemical Material Corp.

  Alpha Olefin Sulfonate  Application of washing powder The decontamination test showed that LAS and AOS showed good synergy in both phosphorous powder and phosphorus-free powder. Among the phosphorous detergent, LAS: AOS has the most significant synergy at 8:2. In the non-phosphorous washing powder with LAS and AOS as anionic active ingredients, the decontamination of AOS increased significantly when the proportion of anionic active components was greater than 20 %. The decontamination synergy of AOS in phosphorus-free washing powder is more prominent than that in phosphorous powder.   AOS and enzymes have better solubility. The activity of residual enzymes in detergent solutions containing domestic proteinases and imported proteinases(such as Savnase) was compared. Over time, the residual enzyme activity of anionic active groups divided into pure LAS was low. The residual enzyme activity is higher in detergent solution with AOS partial replacement or all substitution of LAS.   There

  Principle: Ethyl iodide is usually reacted with ethanol, iodine and red phosphorus, but the reaction is slow, and it needs to be heated in a reflux device for several hours.   Supplies: Flask, straight condenser, beaker, red phosphorus, alcohol, iodine crystals, zeolite, 5% NaOH solution, anhydrous calcium chloride.   Operation: 2 g of red phosphorus and 25 ml of alcohol were added to a 125 ml flask, and 18 g of finely divided iodine crystals were added in portions under shaking, followed by the addition of 3 zeolites. A straight condenser was placed on the flask and allowed to reflux for half an hour by heating in a water bath. After the reaction is completed, the mixture is cooled, and the reflux straight condenser is discharged, and then the condenser is replaced with a common distillation apparatus. It should be noted that the receiver should be filled in a cold water bath to prevent the produced iodoethane from being volatilized.   The iodoethane was distilled off in a boiling w

  CAS: 53956-04-0 Name: Monoammonium Glycyrrhizinate   The nature and use of glycyrrhizic acid Licorice is the root of leguminous plants, mainly produced in Mongolia, Shanxi, Gansu, Ningxia and Xinjiang. Licorice is sweet, so it is also known as sweet grass and honey grass. There are four main chemical components: triterpenoids, flavonoids, alkaloids and polysaccharides. Among them, the triterpenoids include glycyrrhizic acid and hydroxyglycyrrhetinic acid.   Glycyrrhizic acid is also known as glycyrrhizin. It is white crystal, crystallized with glacial acetic acid, and has a strong sweet taste. The molecular formula is C42H62O16 and the molecular weight is 822.90. The pure product is a white, odorless crystalline powder. Its melting point is 212 ℃ ~ 217 ℃, soluble in hot water and hot dilute ethanol, almost insoluble in anhydrous ethanol or ether. Glycyrrhizic acid is often present in plants in the form of calcium, potassium, ammonium salts, and the like. The ammonium salt extracted f

  The DMC catalyst  is double metal cyanide catalyst. Compared with similar polyols made using basic(e.g., KOH)catalysts, polyether polyols made from the catalyst have low unsaturations, narrow molecular weight distributions, have high molecular weight, and are useful in making a variety of polyurethane products. DMC catalyst  is highly active in epoxide polymerization reactions used to prepare polyether polyols.   We can yield the DMC more than 20000 kg within one year, and thus afford to produce 50 ～ 70 ten thousand tons of polyols. This catalyst is white or light yellow powder, is suitable for preparation of polyols with 1~6 functions. Compared with basic catalysts, this catalyst can be used with less amount (30ppm), and reaction time of polymerization is reduced largely, and the polyols products are not necessary to be refined. The DMC is suitable for using in common epoxide polymerization reactors, but it can be better if reactors have both of stirring and cycling systems.   When