Method for preparing bagasse dissolving pulps and producing rayon having a degree of polymerization of at least 800 therefrom

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专利权人:

PROCESS EVALUATION & DEV CORP

发明人:

VILLAVICENCIO, EDUARDO J

申请号：

US19780954668

公开号：

US4199399(A)

申请日:

1978.10.25

申请国别(地区):

美国

年份:

1980

代理人:

摘要：

A dissolving pulp suitable for preparing rayon having a degree of polymerization of greater than about 800 can be produced using bagasse by a sodium hydroxide-sodium sulfite digestion at a ph of about 10.5 to 11.5 and preferably about 10.8 to 11.2 and a caustic-sulfite weight ratio of 1:1 to 1:3 followed by a bleaching sequence of DcEDH or DcEDD. This results in a high purity low silica content fiber which has undergone very little degradation.

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