US 9,090,842 B2 · Method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed

Abstract

The present invention relates to a method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed, wherein, using a slurry bed reactor for refining by hydrogenation, an equilibrium system containing polyoxymethylene dialkyl ethers products is refined by catalytic hydrogenation, so as to remove formaldehyde contained therein. The refining method by hydrogenation described in the present invention can remarkably increase the separation and purification efficiency of polyoxymethylene dialkyl ethers, and the polyoxymethylene dialkyl ethers obtained after subsequent rectification have a purity greater than 99.5%, a product yield greater than 97% and an atom utilization ratio close to 100%.

Claims20

Dependent claims

A method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed, comprising:

performing catalytic hydrogenation using a slurry bed reactor and in the presence of catalyst, of an equilibrium system containing polyoxymethylene dialkyl ether products and formaldehyde to produce refined polyoxymethylene dialkyl ether products having formaldehyde contained therein removed, and
performing separation and purifying operations on the refined products after formaldehyde removal.

Dependencies are inferred from the claim text.

Facts

Application

14/257,215Filed 21 Apr 2014

Priority

CN 2013 1 02321019 Jun 2013

Published

US 2014/0364652 A111 Dec 2014

Granted

28 Jul 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

C10L 1/02
Liquid carbonaceous fuels: essentially based on components consisting of carbon, hydrogen, and oxygen only
C07C 29/141
Of a —CHO group: with hydrogen or hydrogen-containing gases
C07C 41/56
By reactions producing [IMAGE cpc-sch-C07C-0958.gif] groups: by condensation of aldehydes, paraformaldehyde, or ketones
C08G 2/28
Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other…:…

Method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed

Life of this patent

Method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed

Life of this patent

Abstract

Claims20