CA1137068A
Expired / Lapsed
CA
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Catalysts and catalyst components useful for polymerizing olefins
Assignee: Montedison SpA
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Filing: 1979-04-11
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Granted: 1982-12-07
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Expires: 1999-04-11
Abstract
Abstract ABSTRACT OF THE DISCLOSURE There are disclosed new catalyst-forming components obtained by reacting at least the following substance: (a) a halogenated Ti compound containing at least one Ti-halogen bond; (b1) a support an essential constituent of which is a mixture of an oxygenated Mg compound with an ad-duct between a Mg dihalide and at least one elec-tron-donor compound and/or with the product of de composition of said adduct containing Mg dihalide; and/or (b2) the product obtained by treating and oxygenated Mg compound with an electron-donor compound. Also disclosed are catalysts prepared from said new ca-talyst-forming components, as is use of the catalysts in the po-lymerization of olefins, more particularly olefins CH2=CHR in which R is a alkyl or aryl radical having 1-8 carbon atoms, of mixtures of said olefins and of mixtures thereof with ethylene.
Inventors
- 👤 Umberto Scata'
- 👤 Giuliano Cecchin
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-23 09:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
222 words
Components for catalysts for polymerizing olefins comprising the product of the reaction between at least the following substances (a) a halogenated Ti compound selected from Ti tetrahalides and Ti haloalcoholates; (b) a solid support comprising the following essential components or mixtures thereof: component (b1) containing (A) an oxygenated Mg compound selected from the group consisting of MgO, mixed oxide of Mg, Al and/or Si, Mg hydroxide Mg hydrocychloride or bromide, Mg nitrate, Mg phosphates, Mg silicates, Mg carboxylates and the product obtained from the dehydration, under hydrolysis conditions, of hydrated My halides, and (B) an adduct between a Mg dihalide and at least one hydrocarbyl electron-donor compound or the product of the decomposition of said adduct to Mg dihalide; or component (b2) obtained by reacting an oxygenate Mg compound as defined in (A) with a hydrocarbyl electron-donor compound free from active hydrogen atoms (ED) or with a mixture thereof with an electron-donor compound containing active hydrogen atoms (HED); the reaction system also comprising a compound ED, at least when said compound ED or derivatives thereof is not used in preparing support (b), the amount of compound ED present in the catalyst component, in a form not extractable with TiCl4 at 80°C, being in the range of from 0.05 to 5 moles per mole of Ti compound existing after the treatment at 80°C.
Claim 2
Dependent Claim
222 words
Components for catalysts for polymerizing olefins comprising the product of the reaction between at least the following substances (a) a halogenated Ti compound selected from Ti tetrahalides and Ti haloalcoholates; (b) a solid support comprising the following essential components or mixtures thereof: component (b1) containing (A) an oxygenated Mg compound selected from the group consisting of MgO, mixed oxide of Mg, Al and/or Si, Mg hydroxide Mg hydrocychloride or bromide, Mg nitrate, Mg phosphates, Mg silicates, Mg carboxylates and the product obtained from the dehydration, under hydrolysis conditions, of hydrated My halides, and (B) an adduct between a Mg dihalide and at least one hydrocarbyl electron-donor compound or the product of the decomposition of said adduct to Mg dihalide; or component (b2) obtained by reacting an oxygenate Mg compound as defined in (A) with a hydrocarbyl electron-donor compound free from active hydrogen atoms (ED) or with a mixture thereof with an electron-donor compound containing active hydrogen atoms (HED); the reaction system also comprising a compound ED, at least when said compound ED or derivatives thereof is not used in preparing support (b), the amount of compound ED present in the catalyst component, in a form not extractable with TiCl4 at 80°C, being in the range of from 0.05 to 5 moles per mole of Ti compound existing after the treatment at 80°C.
Claim 3
Dependent Claim
54 words
A catalyst component according to claim 1, in which the adduct existing in support (b1) contains compound HED and/or ED each in amounts of at least 0.1 mole per mole of Mg dihalide, the molar ratio between the Mg oxygenated compound and the Mg dihalide both combined and being comprised between 0.05:1 and 20:1.
Claim 4
Dependent Claim
37 words
A catalyst component according to claim 1, in which product (b2) contains compound ED or mixtures thereof with HED in amounts ranging from 0.1 to 5 moles of ED and from 0.1 to 5 moles of HED.
Claim 5
Dependent Claim
22 words
A catalyst component according to claim 1, in which less than 50% of the Ti compound is soluble in TiCl4 at 80°C.
Claim 6
Dependent Claim
22 words
A catalyst component according to claim 1, in which less than 50% of the Ti compound is soluble in TiCl4 at 135°C.
Claim 7
Dependent Claim
40 words
A catalyst component according to claim 1, in which support (b1) is prepared by halogenating an oxygenated Mg com-pound of (b1), and by reacting the Mg dihalide with a compound HED and/or ED, either simultaneously with the halogenation or successively.
Claim 8
Dependent Claim
34 words
A catalyst component according to claim 1, in which support (b1) is prepared by dehydration, under hydrolysis con-ditions, of Mg hydrated dihalides and by reaction of the Mg di-halide with compound HED and/or ED.
Claim 9
Dependent Claim
41 words
A catalyst component according to claim 7, in which the Mg hydrated halide is MgCl2.nH2O, wherein is comprised between 0.5 and 6, and the dehydration is effected by heating the Mg hydrated halide to a temperature ranging from 350° to 500°C.
Claim 10
Dependent Claim
27 words
A catalyst component according to claim 8, in which the dehydration is effected by heating the Mg hydrated halide to a temperature ranging from 350° to 450°C.
Claim 11
Dependent Claim
24 words
A catalyst component according to claim 1, in which support (b1) is prepared by mixing the oxygenated Mg compound with the adduct of (b1).
Claim 12
Dependent Claim
31 words
A catalyst component according to claim 1, in which support (b1) is prepared by reacting the Mg dihalide with compound HED and/or ED in the presence of the oxygenated Mg compound.
Claim 13
Dependent Claim
24 words
A catalyst component according to claim 1, in which compound ED is reacted, in either combined or uncombined form, with a pre-formed support (b1).
Claim 14
Dependent Claim
14 words
A catalyst component according to claim 1, in which the Ti compound is TiCl4.
Claim 15
Dependent Claim
37 words
Catalysts for polymerizing alpha-olefins containing at least three carbon atoms, comprising the product obtained by mixing the following components: (a) an organometallic Al compound selected from the Al-alkyl compounds; (b) a catalyst component according to claim 1.
Claim 16
Dependent Claim
36 words
A catalyst according to claim 14, in which the catalyst-component (a) is an Al-trialkyl or mixtures thereof with an Al-dialkyl halide complexed for 20-100% with an electron-donor compound selected from the esters of the aromatic acids.
Claim 17
Dependent Claim
17 words
A catalyst according to claim 14, in which the Al/Ti ratio is comprised between 1 and 1,000.
Claim 18
Dependent Claim
17 words
A catalyst according to claim 15, in which the Al/Ti ratio is comprised between 1 and 1,000.
Claim 19
Dependent Claim
46 words
A process for (co)polymerizing olefins CH2 = CHR, in which R is an alkyl or aryl radical having 1 to 8 C, and mixtures of said olefins with ethylene in which the (co)polymerization is carried out in the presence of a catalyst according to claim 14.
References Cited (Backward Citations)
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