Process for preparing glycolic acid from formaldehyde using acetic acid
First Claim
Patent Images
1. In a process for preparing glycolic acid by the hydrogen fluoride-catalyzed reaction of formaldehyde and carbon monoxide, the improvement which comprises carrying out the reaction in the presence of acetic acid in an amount of at least 0.3 mol for each mol of formaldehyde but less than 0.5 mol of acetic acid for each mol of formaldehyde.
0 Assignments
0 Petitions
Accused Products
Abstract
The hydrogen fluoride-catalyzed carbonylation of formaldehyde to prepare glycolic acid can be carried out with a significant reduction in by-product formation and at a significantly improved rate by incorporating minor amounts of acetic acid in the reaction medium.
21 Citations
2 Claims
-
1. In a process for preparing glycolic acid by the hydrogen fluoride-catalyzed reaction of formaldehyde and carbon monoxide, the improvement which comprises carrying out the reaction in the presence of acetic acid in an amount of at least 0.3 mol for each mol of formaldehyde but less than 0.5 mol of acetic acid for each mol of formaldehyde.
-
2. In a process for preparing glycolic acid by contacting a synthesis gas comprising carbon monoxide and hydrogen with aqueous formaldehyde in a hydrogen fluoride reaction medium, the improvement which comprises effecting said contacting in a reaction medium comprising hydrogen fluoride and in addition thereto acetic acid, the acetic acid being present in an amount of at least about 0.3 mol for each mol of formaldehyde but less than 0.5 mol of acetic acid for each mol of formaldehyde.
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeChevron Research Company (Chevron Corp.)
-
Original AssigneeChevron Research Company (Chevron Corp.)
-
InventorsBakshi, Kiran R.
-
Primary Examiner(s)Thomas, Jr., James O.
-
Assistant Examiner(s)Hendriksen, Leah
-
Application NumberUS05/809,736Time in Patent Office578 DaysField of Search260/535, 260/535 RUS Class Current562/518CPC Class CodesC07C 51/10 by reaction with carbon mon...C07C 59/06 Glycolic acid
