Sk Innovation Co., Ltd.

Korea Research Institute of Chemical Technology

Sk Innovation., Ltd.

Bu Sub Song

Yong Ki Park

Sun Woong Choi

Won Choon Choi

Hee Young Kim

Deuk Soo Park

Na Young Kang

Dae Hyun Choo

Chul Wee Lee

Suk Joon Kim

Tae Jin Kim

Sun Choi

Seung Hoon Oh

Ji Min Kim

Yong Seung Kim

Hong Chan Kim

Young Ki Park

Disclosed are a molecular sieve catalyst and a preparation method thereof to produce light olefins from cracking naphtha catalytically in severe environments of high temperature and high moisture. In detail, the catalyst is prepared by spray-drying and calcining the mixed slurry, in which 0.01&#x2dc;5.0 wt % of MnOand 1&#x2dc;15 wt % of POare simultaneously imbedded in catalyst which consists of zeolite, clay and inorganic complex. According to the present invention, the method that manganese and phosphate are imbedded simultaneously in zeolite and inorganic complex is used to increases thermal-stability of obtained spherical catalyst, and increase olefin yield of cracking hydrocarbon such as naphtha by protecting acid-site of zeolite. To synthesize the required catalyst, the important procedures are mixing ratio and mixing sequence of Mn, P, zeolite, and inorganic complex.

Catalyst for catalytic cracking of hydrocarbon, which is used in production of light olefin and production method thereof

A method of preparing ZSM-5, including: providing a nanocrystalline ZSM-5 seed having a size of 70-150 nm; adding the nanocrystalline ZSM-5 seed to a stock solution including water glass as a silica source, an alumina source, a neutralizer and water to form a reaction mixture; and maintaining the reaction mixture at 150-200&#xb0; C. to crystallize the reaction mixture. The method is advantageous in that ZSM-5 having small and uniform crystal sizes and including no impurities can be synthesized in a short period of time.

Method of preparing ZSM-5 zeolite using nanocrystalline ZSM-5 seeds

Growing community of inventors

Daejeon, South Korea

Bu Sub Song