# US 10,307,733 B2 · Guard bed material, its method of making and use

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- Number: US 10,307,733 B2
- Document ID: US10307733B2
- Status: Granted
- Kind: B2
- Application number: 15/523,250
- Filed: 2015-11-11
- Published: 2017-11-23
- Granted: 2019-06-04
- Earliest claimed: 2014-12-18
- Assignees: ExxonMobil Chemical Patents Inc.
- Applicants: ExxonMobil Chemical Patents Inc.
- Inventors: Matthew J. Vincent; Terry E. Helton; Jenna L. Walp; Dominick A. Zurlo, IV; Doug F. Colmyer
- Web page: https://patentgrep.com/patent/US10307733B2

## CPC

- B01J 20/3408: {of aluminosilicate molecular sieves}
- B01D 15/00: Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01J 29/04: having base-exchange properties, e.g. crystalline zeolites {(B01J29/005 takes precedence)}
- C07C 2/66: Catalytic processes
- C07C 6/126: {of more than one hydrocarbon}
- C07C 7/04: by distillation
- C07C 7/11: by absorption, i.e. purification or separation of gaseous hydrocarbons with the aid of liquids
- C07C 15/04: Benzene
- C07C 15/073: Ethylbenzene
- C07C 15/085: Isopropylbenzene
- C07C 2529/06: Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- C07C 2529/08: of the faujasite type, e.g. type X or Y
- C07C 2529/18: of the mordenite type
- Y02P 20/52: using catalysts, e.g. selective catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present disclosure relates to a material preferably used in a guard bed, and having an increased capacity to adsorb catalyst poisons, as measured by collidine update at 200° C. The material is made by a method in which it is treated by being dried with a drying gas, preferably, at a temperature greater than about 200° C. The treated material may be used to remove impurities from untreated feed streams to, for example, aromatic alkylation and transalkylation processes, where such impurities act as catalyst poisons that cause deactivation of the acidic molecular sieve-based catalysts used, thereby increasing the cycle length of such catalysts.

## Claims

### Claim 1

A process for producing a mono-alkylated aromatic compound stream comprising the steps of:
(a) providing a material comprising a molecular sieve, said material having a first collidine uptake at 200° C.;
(b) drying said material in a shallow moving bed dryer having a material deposit height of less than about 1 meter with a drying gas at a temperature greater than about 200° C. to produce a guard bed material having a second collidine uptake at 200° C., wherein said second collidine uptake is greater than said first collidine uptake;
(c) contacting an untreated stream having one or more impurities with said guard bed material of step (b) to remove at least a portion of said impurities and to produce a treated feed stream having a reduced amount of impurities, wherein said untreated stream comprising one or more alkylatable aromatic compound streams, optionally one or more alkylating agent streams; and
(d) contacting said treated feed stream of step (c) and an alkylating agent stream with an alkylation catalyst composition under alkylation condition or a transalkylation catalyst composition under transalkylation conditions to produce an effluent stream comprising said mono-alkylated aromatic compound stream.

### Claim 2 (depends on 1)

The process of claim 1, wherein said material is disposed in a guard bed vessel, and wherein said contacting step (c) is conducted in-situ inside said guard bed vessel.

### Claim 3 (depends on 1)

The process of claim 1, wherein said dryer is a fixed bed dryer, and said drying gas flows through said material.

### Claim 4 (depends on 1)

The process of claim 1, wherein said drying gas is selected from the group consisting of air, oxygen, nitrogen and mixtures thereof.

### Claim 5 (depends on 1)

The process of claim 1, wherein said material is dried at a temperature in the range of greater than or equal to about 200° C. to less than or equal to about 550° C.

### Claim 6 (depends on 1)

The process of claim 1, wherein said drying is conducted for a period of about 1 hour to 36 hours.

### Claim 7 (depends on 1)

The process of claim 1, wherein said impurities comprising compounds having at least one of the following elements: nitrogen, halogens, oxygen, sulfur, arsenic, selenium, tellurium, phosphorus, and Group 1 through Group 12 metals.

### Claim 8 (depends on 1)

The process of claim 1, wherein said alkylation catalyst composition or said transalkylation catalyst composition comprising a molecular sieve selected from the group consisting of beta, faujasite, mordenite, and a MCM-22 family molecular sieve and mixtures thereof, wherein said MCM-22 family materials are characterized by having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 3.57±0.07 and 3.42±0.07 Angstroms (either calcined or as-synthesized).

### Claim 9 (depends on 8)

The process of claim 8, wherein said faujasite molecular sieve is selected from the group consisting of 13X, low sodium ultrastable Y (USY), dealuminized Y (Deal Y), ultrahydrophobic Y (UHP-Y), rare earth exchanged Y (REY), rare earth exchanged USY (RE-USY), and mixtures thereof.

### Claim 10 (depends on 8)

The process of claim 8, wherein said mordenite molecular sieve is selected from the group consisting of mordenite, TEA-mordenite and mixtures thereof.

### Claim 11 (depends on 8)

The process of claim 8, wherein said MCM-22 family molecular sieve is selected from the group consisting of MCM-22, PSH-3, SSZ-25, MCM-36, MCM-49, MCM-56, ERB-1, EMM-10, EMM-10-P, EMM-12, EMM-13, UZM-8, UZM-8HS, ITQ-1, ITQ-2, ITQ-30 and mixtures thereof.

### Claim 12 (depends on 1)

The process of claim 1, wherein said alkylating agent stream comprising an olefinic compound having 1 to 5 carbon atoms or a poly-alkylated aromatic compound.

### Claim 13 (depends on 1)

The process of claim 1, wherein said alkylating agent stream comprising ethylene, propylene or mixtures thereof.

### Claim 14 (depends on 1)

The process of claim 1, wherein said alkylating agent stream comprising polyethylbenzene(s), polyisopropylbenzene(s) or mixtures thereof.

### Claim 15 (depends on 1)

The process of claim 1, wherein said alkylatable aromatic compound stream comprising benzene.

### Claim 16 (depends on 1)

The process of claim 1, wherein said alkylation conditions are at least partially liquid phase conditions and include a temperature of 10° C. to 400° C. and a pressure of up to about 25000 kPa, and a WHSV based on the weight of said alkylating agent from about 0.1 hr−1 to about 100 hr−1.

### Claim 17 (depends on 1)

The process of claim 1, wherein said transalkylation conditions are at least partially liquid phase conditions, and include a temperature of from about 100° C. to about 300° C., a pressure of about 200 kPa to about 600 kPa, and a WHSV based on the weight of said alkylating agent from about 0.5 hr−1 to about 100 hr−1.