Process of hydroxyl calcium phosphate was introduced,and control condition of process on the quality of product was discussed.

Preparation and application of alkaline Ca-bentonite anhydrous material in ethanol vapor dehydration;

A kind of alkaline Ca-bentonite anhydrous material was presented for removal of water from organic vapor.

Using organic acids which is rich in nature, alkaline Ca-bentonite can be modified by a wide range of organic acid bentonite.

For the purpose of knowing alkaline Ca-bentonite further and broadening its application, this paper had searched its preparation mechanism and proposed two kinds of application on grease refining and composed organic acid bentonite.

In order to broaden the application of bentonite, a kind of alkaline Ca-bent with anion exchange capability and its preparing method have been proposed in this paper.

We made primary research about the effect when the cirrhina molitorella bone was transformed to active calcium under condition of the optimum technology,compound condition,activation time and activation temperature,different acid concentration,about different methods for extracting active calcium and test of some ingredient of active calcium.

This paper relates the basic property of calcium carbonate which affects the processingperformance of rubber and mechanical properties of cured compound, and briefly introduces theapplication of heavy calcium、light calcium、active calcium and nano-calcium used in rubber goods.

A new technology of producing active calcium in conbination with medicinal calcium carbonate has been presented.