Integrated phenol hydroxylating process of preparing dihydroxylbenzene

Application Number  00129478 Application Date  2000.12.29
Publication Number  1361094 Publication Date  2002.07.31
Priority Information    
Applicant(s) Name  Inst., Beijing Yanshan Petrochemical Co.  
Inventor(s) Name  Zhang Xinfang;Chen Xiaodong;Zang Fulu  
Patent Agency Code  11038 Patent Agent  sun ai
AbstractThe present invention is the integrated phenol hydroxylating process of preparing dihydroxybenzene and hydrogen peroxide. In the process, homogeneous or inhomogeneous catalyst, especially solid phase composite oxide catalyst, it adopted. The phenol hydroxylating process with water as solvent includes separation of hydroxylated liquid to obtain phenol containing water solution and phenol extraction of partial water solution in a phenol-water extracting tower with the extraction raffinate with phenol content less than 0.05% being made to enter into hydrogen peroxide preparing system directly. Hydrogen peroxide is prepared through anthraquinone process and the obtained water solution of hydrogen peroxide is used in hydroxylating process directly. The present invention can reduce cost for the concentration, refining and storing of hydrogen peroxide while reducing the exhaust amount of phenol containing effluent.