摘要:
The invention relates to a method and apparatus for recovering lignin and kali from an alkaline lignin solution. One or more electrolytic cells are used to anodically acidify the lignin and simultaneously cathodically regenerate alkali. The invention is especially advantageous for the preparation of pure lignin and alkali from the waste liquor of a cellulose process.
摘要:
Disclosed is a process for the conversion of difficultly degradable or toxic substances into degraded or degradable substances. The substances are treated by passing direct current of 0.5 to 50 mA/cm.sup.2 through an aqueous medium containing 0.5 to 10 mg/l hydrogen peroxide per COD unit.
摘要翻译:公开了将难降解或有毒物质转化为降解或降解物质的方法。 该物质通过0.5至50mA / cm 2的直流电流通过每个COD单元含0.5-10mg / l过氧化氢的水性介质来处理。
摘要:
The method according to the invention for determining characteristics of a sample liquid including a plurality of substances includes the recording current-voltage measurement data of a liquid with at least one known characteristic, the transforming of measurement data of the liquid into a feature space to obtain a first plurality of feature values, the recording of current-voltage measurement data of the sample liquid, the transforming of measurement data of the sample liquid into the feature space to obtain a second plurality of feature values, and the determining of at least one characteristic of the sample liquid based on the feature values of the sample liquid in relation to the feature values of the liquid with the at least one known characteristic.
摘要:
In making a lead electrode for a lead-acid accumulator or the like, a supporting body of titanium is pickled in a boiling solution of oxalic acid and then adsorptively coated with a titanium (IV) layer in a treatment bath. This treatment is followed by the anodic coating of the titanium body with PbO.sub.2 in an electrolyte containing the ions of lead (II), in the presence of a lead (II) nitrate or a lead (II) salt of an amido, imido, nitrido or fluoro sulfate or phosphate. The treatment bath may be an aqueous solution of an organic titanium salt, the pickling solution, or the electrolyte. If the pickling solution is used for this purpose, the titanium body is anodically connected or the solution is oxygenated. If the electrolyte is utilized, Ti(IV) ions are introduced into that liquid in which the titanium body is immersed for an extended period before closure of the anodizing circuit.