摘要:
Pulverulent mixtures containing hydrogen peroxide and hydrophobised silicon dioxide are used for the controlled release of hydrogen peroxide and/or oxygen. The controlled release can take place in a time-delayed manner or by the application of pressure. Hydrogen peroxide can be released into aqueous or pulverulent media and in emulsions, gels, creams or pastes.
摘要:
The present invention is directed to pulverulent mixtures comprising hydrogen peroxide and hydrophobized, pyrogenically prepared silicon dioxide powder, preferably with a methanol wettability of at least 40. The pulverulent mixtures exhibit good storage stability and can be used for the controlled release of hydrogen peroxide and/or oxygen. The invention also includes methods of making these pulverulent mixtures and methods of using the mixtures in detergents, cleaning compositions, topical medications, antimicrobials and other products.
摘要:
Pulverulent mixture comprising hydrogen peroxide and hydrophobized, pyrogenically prepared silicon dioxide powder, wherein the hydrophobized silicon dioxide powder has a methanol wettability of at least 40 and is present to the extent of less than 9 wt. %, based on the total weight, and the content of hydrogen peroxide, based on the total weight, is between 10 and 50 wt. % It is prepared by a process in which hydrophobized silicon dioxide powder with a methanol wettability of more than 40 is treated with an aqueous hydrogen peroxide solution at temperatures of not more than 70° C. It can be used in detergents, in cleaning compositions and in skin and hair treatment compositions.
摘要:
Reduction of the nitrite content of aqueous solutions by treatment with hydrogen peroxide in the acidic pH range can be controlled by measurement of the redox potential. Contrary to the teaching of the prior art, addition of the hydrogen peroxide in the process according to the invention is terminated not at the highest redox potential, but only after lowering of the potential to a value of 650.+-.10 mV. In this way, nitrite contents below 1 mg/l can be obtained even when the solutions additionally contain fluctuating amounts of various compounds oxidizable by H.sub.2 O.sub.2.
摘要翻译:通过在酸性pH范围内用过氧化氢处理来降低水溶液的亚硝酸盐含量可以通过测量氧化还原电位来控制。 与现有技术的教导相反,根据本发明的方法中的过氧化氢的添加终止于没有达到最高的氧化还原电位,但是仅在将电位降低到650±10mV的值之后。 这样就可以获得低于1mg / l的亚硝酸盐含量,即使这些溶液另外含有波动量的可被H 2 O 2氧化的各种化合物。