Process for preparing refined acrylic esters

Details Process for preparing refined acrylic esters Process for preparing refined acrylic esters

Filed on

1997-11-26

Date issued

1999-10-19

Examiner

Manoharan, Virginia

Patent Class

Distillation: processes, separatory

SubClass

Addition of material to distilland to inhibit or prevent...

Other Related Categories

203 8, 203 49, 203 65, 203 71, 203DIG21, 560218, 562600, B01D 334, C07C 5144, C07C 6754

Type

Patent

Status

active

Patent number

059683228

Description

ABSTRACT:
A process for preparing refined acrylic esters, the process including steps of distilling an acrylic ester containing stream in the presence of hydroquinone or substituted hydroquinone, at a concentration in the range of 200 to 5000 ppmw, wherein the distillation is carried out in the presence of 0.001 to 1.0 % v, on the vapor phase, of oxygen.

REFERENCES:
patent: 908001 (1908-12-01), Horbet et al.
patent: 3666794 (1972-05-01), Otsuki et al.
patent: 3674651 (1972-07-01), Otsuki et al.
patent: 3717553 (1973-02-01), Otsuki et al.
patent: 3812175 (1974-05-01), Happel et al.
patent: 3816267 (1974-06-01), Chuang
patent: 3988213 (1976-10-01), Yoshida et al.
patent: 4021310 (1977-05-01), Shimizu et al.
patent: 4861902 (1989-08-01), Haubrich et al.
Przem. Chem. (1982), 61(9), 304-5-"Stabilization of acrylic monomers", Y. Morawski Polish journal paper describing the effectiveness of compounds and mixtures as polymerization inhibitors in the distillation of acrylic compounds. For acrylic acid hydroquinonc, phenothiazine and inhibitors in the distillation of acrylic compounds. For acrylic acid hydroquinone, phenothiazine and air is considered most suitable with the further addition of p-methoxyphenol for methyl methacrylate.
International Search Report Nov. 8, 1995.

Affiliated with

Also associated with

Rating

Process for preparing refined acrylic esters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing refined acrylic esters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing refined acrylic esters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2051217