Title: Method of manufacturing alkylene oxide adducts of an aliphatic alcohol

Abstract: An improvement is provided in the manufacture of alkylene oxide adducts of an aliphatic alcohol in which the reaction mixture, comprising the alkylene oxide adduct, unreacted alcohol, acid catalyst residue, carbonyl compounds and hydrocarbons, is treated to remove unreacted alcohol for recycle to the adduct formation step. To prevent the build-up in the system of carbonyl compounds and hydrocarbons which are not easily distillable from the recycle alcohol because of their respective boiling points, at least a portion of the recycle alcohol is esterified with boric acid, the esterification mixture is subjected to distillation to remove volatile portions, and the borate ester thus obtained is hydrolyzed to recover the alcohol which is recycled to the adduct formation step.

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Inventors: Kurata, Naoji (Nishinomiya, JA)
Koshida, Kazuo (Ashiya, JA)
Fujii, Toshihiro (Moriguchi, JA)
Matsushiro, Koichi (Achiya, JA)
Okuda, Yukio (Toyonaka, JA)

Application Number: 271685
Filing Date: 1972-07-14
Publication_date: 1976-01-13
Assignee: Nippon Shokubai Kaguku Kogyo Co., Ltd. (Osaka, JA)
Primary Class(es): 568/618 568/887, 568/913, 568/914, 568/918, 568/921
Other Classes:
US Patent Ref:

2587753	Mar, 1952	O'Connor et al.	260/639.
2870220	Jan, 1959	Carter	260/615.
2885446	May, 1959	Sharp et al.	260/643.
3281477	Oct, 1966	Nielsen	260/615.
3346614	Oct, 1967	Starks et al.	260/639.
3372201	Mar, 1968	Leary et al.	260/615.
3442959	May, 1969	Sugarman	260/639.
3524891	Aug, 1970	Cahn	260/639.
3524893	Aug, 1970	Doyle et al.	260/639.
3558687	Jan, 1971	Russell	260/639.

Other Refs: 1,097,1525,348,8841,919,593

Dec, 1967	UK
Dec, 1956	CA
Dec, 1967	DT

Primary Examiner: Mars, Howard T.
Assistant Examiner:
Attorney: Armstrong, Nikaido & Wegner