US 2022/0135498 A1 · METHODS FOR OPERATING ACETYLENE HYDROGENATION UNITS IN OLEFIN PRODUCTION PROCESSES

Abstract

A method for selectively hydrogenating acetylene in a cracked gas from a steam cracking unit for producing olefins may include separating a hydrogenation feed from the cracked gas. The hydrogenation feed may include acetylene, hydrogen, carbon monoxide, and at least one product. The method may further include contacting the hydrogenation feed with an acetylene hydrogenation catalyst, the contacting causing hydrogenation of at least a portion of the acetylene of the hydrogenation feed to produce a hydrogenation effluent. In response to a change in a composition of a feedstock to the steam cracking unit that results in a change in a hydrogen concentration in the hydrogenation feed, the method may further include determining the hydrogen concentration in the hydrogenation feed and increasing or decreasing a temperature of the hydrogenation feed based on the determined hydrogen concentration of the hydrogenation feed.

Claims17

Dependent claims

A method for selectively hydrogenating acetylene in a cracked gas from a steam cracking unit for producing olefins, the method comprising:

separating a hydrogenation feed from the cracked gas, the hydrogenation feed comprising acetylene, hydrogen, carbon monoxide, and at least one product;
contacting the hydrogenation feed with an acetylene hydrogenation catalyst, the contacting causing hydrogenation of at least a portion of the acetylene of the hydrogenation feed to produce a hydrogenation effluent;
in response to a change in a composition of a feedstock to the steam cracking unit that results in a change in a hydrogen concentration in the hydrogenation feed, determining the hydrogen concentration in the hydrogenation feed;
and
increasing or decreasing a temperature of the hydrogenation feed based on the determined hydrogen concentration of the hydrogenation feed.

2 more elements

A method for operating an acetylene hydrogenation unit in an olefin production system, the process comprising:

cracking at least a portion of a feedstock in a steam cracking unit to produce a cracked gas, the feedstock comprising one or more hydrocarbons;
passing at least a portion of the cracked gas to a separation system operable to produce at least a hydrogenation feed from the cracked gas, the hydrogenation feed comprising acetylene, carbon monoxide, hydrogen, and at least one product;
contacting the hydrogenation feed with an acetylene hydrogenation catalyst in an acetylene hydrogenation unit, the contacting causing hydrogenation of at least a portion of the acetylene in the hydrogenation feed to produce a hydrogenation effluent;
changing a composition of the feedstock cracked in the steam cracking unit, wherein changing the composition of the feedstock increases or decreases a hydrogen concentration in the hydrogenation feed;
in response to changing the composition of the feedstock, determining the hydrogen concentration in the acetylene hydrogenation unit;
and
increasing or decreasing a temperature of the acetylene hydrogenation unit based on the determination of the hydrogen concentration in the acetylene hydrogenation unit.

4 more elements

Dependencies are inferred from the claim text.

Methods for operating acetylene hydrogenation units in olefin production processes

Life of this patent

Methods for operating acetylene hydrogenation units in olefin production processes

Life of this patent

Abstract

Claims17