Dehydration of Water Containing Source of Formaldehyde, and a Method for Producing an Ethylenically Unsaturated Carboxylic Ester

摘要

Disclosed are methods for dehydrating a water containing source of formaldehyde in which water is separated from the water containing source of formaldehyde using a zeolite membrane. In certain aspects, the water containing source of formaldehyde includes a separation enhancer having a relative static permittivity ranging from 2.5 to 20, and the water containing source of formaldehyde may further include methanol. In certain aspects, (meth)acrylic acid alkyl ester may be produced using the dehydrated source of formaldehyde.

主权项

1. A method for dehydrating a water containing source of formaldehyde comprising:
contacting the water containing source of formaldehyde with a zeolite membrane, and separating at least part of the water from the water containing source of formaldehyde to produce a dehydrated source of formaldehyde, wherein: the water containing source of formaldehyde comprises a separation enhancer having a static permittivity of between 2.5 and 20 at 20° C. and atmospheric pressure and the water containing source of formaldehyde comprises methanol.