[특허]Polymerization catalyst for olefines

Polymerization catalyst for olefines 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08F-004/22
출원번호	US-0912211 (1992-07-16)
우선권정보	FI-0000255 (1990-01-16); FI-0003438 (1991-07-16)
발명자 / 주소	Knuuttila Hilkka (Porvoo FIX) Lakomaa Eeva-Liisa (Espoo FIX)
출원인 / 주소	Neste Oy (Espoo FIX 03)
인용정보	피인용 횟수 : 69 인용 특허 : 0

초록 ▼

The present invention concerns a polymerization catalyst of olefins, said catalyst containing an active chromium compound on an inorganic support. The catalyst in accordance with the invention is prepared by vaporizing a precursor of chromium oxide such as chromyl chloride and allowing the chromium oxide vapor to react with the surface of, e.g., silica gel support material at 160°. . . 500°C. A selective binding of the chromium oxide to the support material is achieved by keeping the vapor pressure sufficiently high and the duration of interaction with the support sufficiently long so as to maintain an excess of the chromium compound in relation to the number of available binding sites on the support material. The activity of a catalyst in accordance with the invention even with a very low content of catalytic metal is as high as the activity of a catalyst of an appreciably higher metal content that has been prepared by the methods of the conventional technology.

대표청구항 ▼

A polymerization catalyst for olefins, comprising: at least one catalytically active chromium compound adsorbed on an inorganic support, wherein said catalyst is prepared by a process comprising: optionally subjecting the support material to a pretreatment in order to modify the number of binding sites available on the support; vapourizing a chromium compound used as the precursor of chromium oxide; routing the obtained vapour into a reaction chamber and reacting said vapour with the support material at a temperature within the range of the minimum temperature necessary to provide the activation energy for establishing chemisorption of the chromium compound onto the surface of the support up to the temperature at which the rate of desorption exceeds the rate of chemisorption of the chromium compound; maintaining the vapour pressure of the chromium compound sufficiently high and the duration of interaction sufficiently long so as to provide at least an equal amount of the chromium compound as there are available binding sites on the support material; removing the chromium compound not bound with the support material from said reaction chamber; and optionally, posttreating the heterogeneous chromium containing catalyst in order to increase its catalytic activity.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Polymerization catalyst for olefines 원문보기

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Polymerization catalyst for olefines 원문보기

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