1, The hydroxylation of phenol to produce dihydric phenol is a rapid and strongly exothermal reaction, the activity of the complex-oxide catalyst decreased rapidly.

2, The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been intro - duced.

3, The aluminium dihydric phosphate coating is prepared and the properties of high temperature resistance, thermal shock resistance and abrasion resistance are studied.

4, As for wine of higher salt content, ammonium dihydric phosphate(NH4H2PO4) was used as background modifier to eliminate the interference of NaCl.

5, The advancement of selective mono functional group protection of dihydric alcohol in recent years was reviewed with 21 references.

6, The method and the condition of separation epoxy ethane from dihydric alcohol are described.

7, Ester bond can be formed through the polycondensation of hard segment monomer with uniform segment length containing amide bond and dihydric alcohol, which is a better way to prepare polyesteramide.

8, The paper deals with selection of thermal isolation scheme, the project construction, checking and acceptance and effect testing in dihydric phenol project with significance for popularization.

9, At the same time the effect becomes more obvious when the chain length of alcohol is getting longer. However, the dihydric alcohols have little effect on the diagram of ATPS.