Adsorbent based on a zeolite and a silica-rich clay, and process for purifying hydrocarbon feeds containing unsaturated molecules

Patent metadata

Field	Value
Publication number	US-10005065-B2
Application number	US-201414296490-A
Country	US
Kind code	B2
Filing date	Jun 5, 2014
Priority date	Jun 10, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

The present invention concerns an adsorbent comprising at least one zeolite selected from a zeolite of the 12 MR, 10 MR and 8 MR type and at least one binder comprising a clay with a Si/Al weight ratio of more than 2. It also concerns its preparation process and its use in a process for purifying a hydrocarbon feed comprising unsaturated molecules and at least one impurity comprising at least one heteroatom of the O, S or N type.

First claim

The invention claimed is:

1. An adsorbent comprising at least one zeolite selected from a KX or NaX zeolite and a clay binder consisting of 100% montmorillonite with a Si/Al weight ratio of more than 2.

2. The adsorbent according to claim 1 , in which the adsorbent comprises in the range 60% by weight to 95% by weight of zeolite and in the range 5% by weight to 40% by weight of the clay binder.

3. The adsorbent according to claim 1 , in which the zeolite contains silicon and an element T selected from the group constituted by aluminium, boron, gallium and iron, and in which the atomic ratio Si/T of the zeolite is less than 20.

4. The adsorbent according to claim 1 , wherein the zeolite is a NaX zeolite.

5. A process for the preparation of an adsorbent as claimed in claim 1 , comprising the following steps:
a) mixing at least one zeolite selected from a KX or NaX zeolite, at least one binder comprising a clay having a Si/Al ratio by weight of more than 2 and at least one solvent;
b) shaping the mixture obtained in step a);
c) optionally, drying;
d) heat treating the shaped material obtained at the end of step b) or c).

6. The preparation process according to claim 5 , in which:
in step a), in the range 60% to 95% by weight of zeolite, and in the range of 5% to 40% by weight of at least one binder comprising a clay having a Si/Al ratio by weight of more than 2 are mixed with at least one solvent,
in step b), the mixture obtained in step a) is shaped by extrusion,
in step c), drying is carried out at a temperature in the range 25° C. to 200° C., and
in step d), a heat treatment is carried out at a temperature in the range 150° C. to 700° C.

7. A process for purifying a hydrocarbon feed comprising unsaturated molecules and at least one impurity comprising at least one heteroatom, in which the feed is brought into contact with the adsorbent according to claim 1 .

Assignees

• Ifp Energies Now

Inventors

• BRACCO Emmanuelle
• MARTI Delphine
• Jolimaitre Elsa
• Bazer-Bachi Delphine
• Lopez Joseph

Classifications

• B01J20/2803

  Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• B01J20/3007

  Moulding, shaping or extruding · CPC title

• B01D2256/24

  Hydrocarbons · CPC title

• B01J20/3078 Primary

  Thermal treatment, e.g. calcining or pyrolizing · CPC title