摘要:
The present invention provides an improved method for the extraction by oxidation of humic substances from coal, the method including a step of milling by means of sonication before the step of oxidising, the step of oxidising being carried out in the presence of an oxidising agent under irradiation with ultraviolet light.
摘要:
Processes for producing 2,5-dichlorophenol and 3,6-dichloro-2-methoxybenzoic acid are described. Various processes for isomerizing 2,4-dichlorophenol over a zeolite catalyst to form 2,5-dichlorophenol are provided. Processes for preparing 2,5-dichlorophenol including hydroxylating 1,4-dichlorobenzene are also described. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.
摘要:
The present invention provides a method of making carboxylic acids from levulinic acid, such as succinic acid and 3-hydroxypropanoic acid, by reacting levulinic acid with an oxidant such as hydrogen peroxide under acidic or basic conditions.
摘要:
The present disclosure provides a process for oxidation of p-xylene to terephthalic acid. Recovery of fluid medium and valuable chemicals in carried out using p-xylene as fluid medium which is also the starting material. The recovered stream containing p-xylene, acetic acid and other valuable chemicals is recycled to the oxidation step. The process disclosed in the present disclosure is energy efficient and cost effective.