US4342855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyethylene
Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1980-08-27
•
Granted: 1982-08-03
•
Expires: 2000-08-27
Abstract
Abstract A process for the production of polyethylene characterized in that the polymerization is carried out in the presence of an alcohol and in the presence of a polymerization catalyst prepared from (A) a solid catalyst component containing at least titanium, magnesium, and chlorine; (B) trialkylaluminum of the formula R13Al wherein R1 is an alkyl or cycloalkyl group; and (C) a chlorine-containing aluminum compound of the formula R2nAlCl3-n wherein R2 is an alkyl or cycloalkyl group, and n is a real number of from 1 to 2.
Inventors
- 👤 Shinichi Akimoto
- 👤 Akio Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:12
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
191 words
In the process for producing polyethylene comprising polymerizing ethylene in the presence of an ethylene polymerization catalyst, the improvement comprising (i) carrying out said polymerization in the presence of an alcohol; and (ii) said polymerization catalyst comprising: (A) a solid catalyst component containing at least titanium, magnesium and chlorine, (B) trialkylaluminum of the formula R.sup.1.sub.3 Al wherein R 1 is an alkyl or cycloalkyl group containing from 1 to 12 carbon atoms; and (C) a chlorine-containing aluminum compound of the formula R.sup.2.sub.n AlCl.sub.3-n wherein R 2 is an alkyl or cycloalkyl group containing from 1 to 12 carbon atoms, and n is a real number of from 1 to 2; said solid catalyst component (A) is obtained by reacting the (1) reaction product of magnesium dialkoxide of the formula Mg(OR.sup.4).sub.2 wherein R 4 is an alkyl, alkenyl, aryl, cycloalkyl, arylalkyl or alkylaryl group containing from 1 to 20 carbon atoms, and (2) silicon tetrachloride, with a chlorine-containing titanium compound of the formula Cl.sub.m Ti(OR.sup.5).sub.4-m wherein R 5 is an alkyl or aryl group containing from 1 to 10 carbon atoms, and m is a real number of from 1 to 4.
Claim 2
Dependent Claim
191 words
In the process for producing polyethylene comprising polymerizing ethylene in the presence of an ethylene polymerization catalyst, the improvement comprising (i) carrying out said polymerization in the presence of an alcohol; and (ii) said polymerization catalyst comprising: (A) a solid catalyst component containing at least titanium, magnesium and chlorine, (B) trialkylaluminum of the formula R.sup.1.sub.3 Al wherein R 1 is an alkyl or cycloalkyl group containing from 1 to 12 carbon atoms; and (C) a chlorine-containing aluminum compound of the formula R.sup.2.sub.n AlCl.sub.3-n wherein R 2 is an alkyl or cycloalkyl group containing from 1 to 12 carbon atoms, and n is a real number of from 1 to 2; said solid catalyst component (A) is obtained by reacting the (1) reaction product of magnesium dialkoxide of the formula Mg(OR.sup.4).sub.2 wherein R 4 is an alkyl, alkenyl, aryl, cycloalkyl, arylalkyl or alkylaryl group containing from 1 to 20 carbon atoms, and (2) silicon tetrachloride, with a chlorine-containing titanium compound of the formula Cl.sub.m Ti(OR.sup.5).sub.4-m wherein R 5 is an alkyl or aryl group containing from 1 to 10 carbon atoms, and m is a real number of from 1 to 4.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein said alcohol is present in a mole ratio of from 0.05 to 10 based upon the total amount of said components (B) and (C) present.
Claim 4
Dependent Claim
32 words
The process of claims 1 or 2 wherein the amount of titanium in said polymerization catalyst is from 0.001 to 10 millimoles per liter of the contents of the polymerization reaction mixture.
Claim 5
Dependent Claim
30 words
The process of claim 3 wherein the total amount of said components (B) and (C) is from 5 to 200 moles per atom of titanium in the said component (A).
Claim 6
Dependent Claim
32 words
The process of claim 4 wherein said alcohol has the formula R 3 OH and wherein R 3 is an alkyl, cycloalkyl or aralkyl group having from 1 to 20 carbon atoms.
Claim 7
Dependent Claim
32 words
The process of claim 1 wherein said alcohol has the formula R 3 OH and wherein R 3 is an alkyl, cycloalkyl or aralkyl group having from 1 to 20 carbon atoms.
Claim 8
Dependent Claim
21 words
The process of claim 4 wherein the ratio of said component (B) to said component (C) is form 20:1 to 1:20.
Claim 9
Dependent Claim
41 words
The process of claim 6 wherein said alcohol is present in a mole ratio of from 0.1 to 5 based upon the total amount of said components (B) and (C); and the ratio of said components is between 5:1 and 1:5.
Claim 10
Dependent Claim
40 words
The process of claim 8 wherein said ethylene is polymerized at an ethylene pressure of from 2 to 50 Kg/cm 2 and at a reaction temperature of from 20° to 200° C. for between about 10 minutes and 5 hours.
Claim 11
Dependent Claim
55 words
The process of claim 9 wherein the amount of titanium in said polymerization catalyst is from 0.005 to 1 millimole per liter of the contents of the polymerization reaction system, and wherein the total amount of said components (B) and (C) is from 20 to 100 moles per atom of titanium in said component (A).
Claim 12
Dependent Claim
40 words
The process of claim 1 wherein said ethylene is polymerized at an ethylene pressure of from 2 to 50 Kg/cm 2 and at a reaction temperature of from 20° to 200° C. for between about 10 minutes and 5 hours.
Claim 13
Dependent Claim
55 words
The process of claim 2 wherein the amount of titanium in said polymerization catalyst is from 0.005 to 1 millimole per liter of the contents of the polymerization reaction system, and wherein the total amount of said components (B) and (C) is from 20 to 100 moles per atom of titanium in said component (A).
Claim 14
Dependent Claim
12 words
The process of claim 1 wherein said magnesium dialkoxide is magnesium diethoxide.
Claim 15
Dependent Claim
13 words
The process of claim 1 wherein said chlorine-containing titanium compound is titanium tetrachloride.
Claim 16
Dependent Claim
21 words
The process of claim 1 wherein said magnesium dialkoxide is magnesium diethoxide and wherein said chlorine-containing titanium compound is titanium tetrachloride.
Claim 17
Dependent Claim
31 words
The process of claim 15 wherein said alcohol is present in a mole ratio of from 0.05 to 10 based upon the total amount of said components (B) and (C) present.
Claim 18
Dependent Claim
30 words
The process of claim 16 wherein the amount of titanium in said polymerization catalyst is from 0.001 to 10 millimoles per liter of the contents of the polymerization reaction mixture.
Claim 19
Dependent Claim
30 words
The process of claim 17 wherein the total amount of said components (B) and (C) is from 5 to 200 moles per atom of titanium in the said component (A).
Claim 20
Dependent Claim
32 words
The process of claim 18 wherein said alcohol has the formula R 3 OH and wherein R 3 is an alkyl, cycloalkyl or aralkyl group having from 1 to 20 carbon atoms.
Claim 21
Dependent Claim
21 words
The process of claim 19 wherein the ratio of said component (B) to said component (C) is from 20:1 to 1:20.
Claim 22
Dependent Claim
41 words
The process of claim 20 wherein said alcohol is present in a mole ratio of from 0.1 to 5 based upon the total amount of said components (B) and (C); and the ratio of said components is between 5:1 and 1:5.
Claim 23
Dependent Claim
40 words
The process of claim 21 wherein said ethylene is polymerized at an ethylene pressure of from 2 to 50 Kg/cm 2 and at a reaction temperature of from 20° to 200° C. for between about 10 minutes and 5 hours.
Claim 24
Dependent Claim
55 words
The process of claim 22 wherein the amount of titanium in said polymerization catalyst is from 0.005 to 1 millimole per liter of the contents of the polymerization reaction system, and wherein the total amount of said components (B) and (C) is from 20 to 100 moles per atom of titanium in said component (A).
Claim 25
Dependent Claim
21 words
The process of claim 1 wherein the ratio of said component (B) to said component (C) is from 20:1 to 1:20.
Claim 26
Dependent Claim
41 words
The process of claim 24 wherein said alcohol is present in a mole ratio of from 0.1 to 5 based upon the total amount of said components (B) and (C); and the ratio of said components is between 5:1 and 1:5.
Claim 27
Dependent Claim
40 words
The process of claim 25 wherein said ethylene is polymerized at an ethylene pressure of from 2 to 50 Kg/cm 2 and at a reaction temperature of from 20° to 200° C. for between about 10 minutes and 5 hours.
Claim 28
Dependent Claim
55 words
The process of claim 26 wherein the amount of titanium in said polymerization catalyst is from 0.005 to 1 millimole per liter of the contents of the polymerization reaction system, and wherein the total amount of said components (B) and (C) is from 20 to 100 moles per atom of titanium in said component (A).
References Cited (Backward Citations)
US3161628A
Cited
US3238146A
Cited
US3644318A
Cited
GB1269067A
Cited
US3833515A
Cited
GB1367087A
Cited
GB1357474A
Cited
US4083802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |