Peroxide, acid bleach bleaching

Linen can be successfully bleached using a process consisting of scouring, alkaline hydrogen peroxide bleach and a peracetic acid bleaching stage. 

In the bleaching of either mechanical or chemical pulp with alkaline hydrogen peroxide, the bleaching stage must always be preceded by a treatment of the pulp with a chelating agent like diethylenetriaminepentaacetic acid (DTPA) or EDTA in order to reduce the content of transition metal ions to acceptable levels. 

Chemicals that can react with and destroy tissue and other materials bleaches such as hydrogen peroxide acids such as sulfuric acid, hydrochloric acid bases such as ammonia, sodium hydroxide Wear goggles, gloves, and an apron. Immediately flush the affected area with water and notify your teacher. 

Phosphoric acid or sodium pyrophosphate can be used with hydrogen peroxide for bleaching fats and oils. Phosphoric acid will remove nickel catalysts from hydrogenated fats and oils (see Section 12.16). Long-chain polyphosphates have a synergistic anti-oxidant action on lard, cottonseed oil and other products. 

Under alkaline conditions, persulfates act as bleach boosters, accelerating the peroxide hair bleaching process by making the hair more porous and facilitating the absorption of dyes. Such persulfates are acidic, flammable when in solid form, and are water soluble [344]. Ammonium persulfate is often preferred because when it is diluted in an alkaline pH environment, it releases ammonia and better facilitates dye penetration into the hair [345]. 

Hydrobromic acid Hydrochloric acid, cone. Hydrofluoric acid Hydrogen peroxide Hypochlorite bleach Isobutyl alcohol Isopropyl alcohol Methyl acetate Methyl alcohol Methyl chloride Methylene chloride Methyl ethyl ketone Nitric acid Nitrobenzene Octyl alcohol Perchloric acid Perchloroethylene Phenol... 

Chemical bleaching is never used on oils intended for edible use because it oxidizes unsaturated fatty acids to cause off-flavors. However, it does find wide usage for specialty linseed oil, for the paint industry, and fatty chemicals such as sorbitan esters of fatty acids and sodium stearoyl lactylate. Residual peroxide is destroyed by heating above its decomposition temperature. 

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