公开(公告)号：JP2000211913A

公开(公告)日：2000-08-02

申请号：JP2000006833

申请日：2000-01-14

Applicant: DEGUSSA

Inventor： LORTZ BEATA-MARIA ,  LORTZ WOLFGANG DR ,  LEONHARDT WOLFGANG DR ,  GROSS JOACHIM ,  KLOTZ OSWIN

IPC: C01B39/04 ,  C01B39/02 ,  C11D3/12 ,  C11D3/16

Abstract: PROBLEM TO BE SOLVED: To obtain a powder increased in fluidity and bulk density without causing additional organic contamination of air by adding an alkylhalosilane to an aqueous suspension of a zeolite powder and drying the suspension. SOLUTION: At least one alkylhalosilane is added to an aqueous suspension of a zeolite powder, especially a filter cake obtained after precipitation and filtration of the zeolite and redispersed in water. The resultant suspension is then dried to afford a crystalline zeolite having the surface modified with the alkylhalosilane and containing the alkylhalosilane in an amount of 0.01-5 mass% based on the amount of the zeolite used. In order to use the zeolite as a detergent, a zeolite with a high Al content having sufficient calcium binding power and represented by the formula aMe2O.bAl2O3.cSiO2.dH2O [Me is Na, Na and/or K; (a)/b is 0.8-1.2; c/b is 1.8-5; d is 0-10] is preferably used.