Title: Process for the high pressure production of polyethylene

Abstract: A process for polymerizing ethylene under the high temperature and high pressure conditions by using a battery of two or more autoclave reactors connected in series by means of piping provided with a heat exchanger, each of said reactors having an upper reaction zone and a lower reaction zone. According to this process, the reaction yield of polyethylene is higher than that attainable from the conventional two-zone polymerization methods, and the obtained polyethylene is improved in optical properties and processability.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Kita, Shinichiro (Niihama, JP)
Hiki, Fumihiko (Ichihara, JP)
Shimizu, Masayuki (Niihama, JP)
Kondou, Akira (Niihama, JP)

Application Number: 821920
Filing Date: 1977-08-04
Publication_date: 1978-10-31
Assignee: Sumitomo Chemical Company, Limited (Osaka, JP)
Primary Class(es): 526/65 526/73, 526/352.2
Other Classes:
US Patent Ref:

3178404	Apr, 1965	Vaugh, Jr. et al.	526/73.
3536693	Oct, 1970	Schrader et al.	526/73.
3575950	Apr, 1971	Gleason et al.	526/73.
3756996	Sep, 1973	Pugh et al.	526/73.
3875128	Apr, 1975	Suzuki et al.	526/73.
4014859	Mar, 1977	Cooper et al.	526/65.

Other Refs: 20,24314,2581,208,120

Oct, 1961	JP.
Apr, 1971	JP.
Oct, 1970	GB.

Primary Examiner: Holler, Alan
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher