Magnesium perborate

Magnesium diborate Magnesium perborate Boron oxide Titanium diboride Boron carbide... 

Acetylacetone Aiumina Caicium chioride Calcium hydride trans-1,2-Dichioroethyiene Lithium bromide Magnesium perborate Nickel acetate Perchloroethylene Soda lime Sodium suifate Zinc oxide drying agent mfg. 

Conversion of the nitrile to the amide has been achieved by both chemical and biological means. Several patents have described the use of modified Raney nickel catalysts ia this appHcation (25,26). Also, alkaH metal perborates have demonstrated their utiHty (27). Typically, the hydrolysis is conducted ia the presence of sodium hydroxide (28—31). Owiag to the fact that the rate of hydrolysis of the nitrile to the amide is fast as compared to the hydrolysis of the amide to the acid, good yields of the amide are obtained. Other catalysts such as magnesium oxide (32), ammonia (28,29,33), and manganese dioxide (34) have also been employed. 

Zeolite A 30.0 Sodium metasilicate pentahydrate 5.0 Magnesium silicate 1.0 Sodium perborate tetrahydrate 25.0 Tetraacetylethylenediamine (TAED) 3.0 Sodium carbonate 15.0 Carboxymethyl cellulose 1.5 Sodium sulphate light, enzymes to 100... 

According to another patent1 a solution of borax containing 13-15 per cent, of carbonate is electrolysed. Presumably, percarbonate is first formed, and this oxidises the borate to perborate. It is necessary to saturate the solution with borax, and solid perborate must also be present. Metallic catalysts which act negatively must be excluded, but stannic acid, bicarbonate of soda and magnesium silicate act as accelerators. 

The necessary amount of borax, as well as a certain quantity of a suspension of magnesium silicate whioh aots as stabilizer, are introduced simultaneously. After 6 hours a further charge of borax is added into the cell. After another 6 hours half of the electrolyte is again drained off and the whole operation described above is repeated. The voltage aoross the bath varies between 5.6 and 6 V and a daily output of 260—270 kg of perborate per cell corresponds approximately to a 57 % current efficiency. The total enorgy consumption per 100 kg of perborate equals 375 to 390 kw-hr. representing an energy efficiency of about 15 %. 

Sodium perborate is a stable material when mixed with other dry ingredients. However, the presence of traces of water and certain heavy metals will catalyze the decomposition of the perborate. Therefore, magnesium sulphate or silicate, or tetrasodium pyrophosphate is added to adsorb traces of water and metal to prolong the storage life of the powders [3, 4]. 

The first step, the formation of sodium metaborate from borax and sodium hydroxide, is carried out at temperatures up to 90°C. When impure borax is used the solution is filtered. The second step is carried out at 25 °C and the mixture subsequently cooled to 15°C and the precipitated sodium peroxoborate hexahydrate filtered off. Stabilizers for the perborate, such as silicates or magnesium salts, may be added to the reaction mixture. Residual moisture (3 to 10%) is removed in a hot air drier. The mother liquor from the second step can be returned to the first step. 

Hydroxyguinoline sulfate Magnesium acetate Myrtrimonium bromide 2-Nitro-2-ethyl-1,3-propanediol Sodium perborate Sodium peroxide Sodium zirconium lactate 2,2 -Thiobis (4,6-dichlorophenol) Tricaprylyl methyl ammonium chloride Trichloroisocyanuric acid 2,6,6-Trimethylbicyclo (3.1.1) heptan-2-ol Zinc chloride... 

Lactic acid, alkyl fatty acids (salicylic acid, glycolic add, benzoic add Chlorhexidine gluconate/acetate Fatty alkyl 1,3-diaminopropane A-Fatty alkyl 3-aminopropionate, A-hydroxyethyl-A-carboxymethyl fatty acid sodium salt of amidoethylamine Ethyl alcohol, propyl alcohol, benzyl alcohol, pine oil Sodium hypochlorite (liquid chlorine bleach), chlorine dioxide, hypochlorous acid, trichloro- and dichloroisocyanuric acids and their salts, sodium perborate and activator, peroxy acid (per acid), magnesium salt of peroxy phthalic acid, oxygen bleach generated from ozone... 

Syndet II lauryl sulfate, 10% dodecylbenzylsulfonate, 17% sodium tripolyphosphate, 30% tetrasodium pyrophosphate, 5% waterglass (powder), 6% magnesium silicate, 2% carboxymethylcellulose, 1% sodium sulfate, 13% sodium perborate, 16%. 

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