Hydrofinishing catalyst and method for producing base oil using same

Patent metadata

Field	Value
Publication number	US-11400435-B2
Application number	US-201917289891-A
Country	US
Kind code	B2
Filing date	Oct 31, 2019
Priority date	Nov 2, 2018
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A hydrofinishing catalyst according to the present invention includes an amorphous silica-alumina support; and a hydrogenated active metal supported on the support, and has an Al composition having a total mass (wt %) of Al and Si as a denominator and a mass (wt %) of Al as a numerator with respect to a reference line, which is a straight line passing through the center of a cross-section of the support, locations evenly spaced apart along the reference line are sequentially numbered, where composition uniformity, which is defined as UN by the Al composition at the i-th location and an average Al composition at the cross-section of the support passing through the center of the support, is 3.0 or less.

First claim

The invention claimed is:

1. A hydrofinishing catalyst comprising:
an amorphous silica-alumina support; and
a hydrogenated active metal supported on the support,
wherein composition uniformity defined as the following Expression 1 satisfies Expression 2,

UN
=

∑

i
=
1

i
=
M

⁢



C
Al

⁡

(
i
)

-

C
Al

⁡

(
ave
)



M
×

C
Al

⁡

(
ave
)

×
1
⁢
0
⁢
0

(

Expression
⁢

⁢
1

)

in Expression 1, UN is composition uniformity, C Al is an Al composition having a total mass (wt %) of Al and Si as a denominator and a mass (wt %) of Al as a numerator, C Al (ave) is an average Al composition on a cross section of a support passing through the center of the support, C Al (i) is an Al composition at an i-th position of positions spaced apart from each other by a predetermined interval along a reference line and sequentially numbered, the reference line being a straight line passing through the center of the cross section of the support, and M is a total number of positions at which the Al composition is measured at the reference line, and is a natural number of 20 to 500,
UN≤ 3.0, and  (Expression 2)

The catalyst satisfies the following Expression 4
(Expression 4)
Amount of Bronsted acid sites measured by adsorption of pyridine at 200° C.≥30 μmol/g.

2. The hydrofinishing catalyst of claim 1 , wherein the catalyst satisfies the following Expression 3,
5.00≤ Pv (100−500)/ Pv (10−500)*100  (Expression 3)

in Expression 3, Pv(10−500) is a total volume (cm 3 /g) of pores within a size range of 10 to 500 nm per unit mass of the catalyst, and Pv(100−500) is a total volume (cm 3 /g) of pores within a size range of 100 to 500 nm per unit mass of the catalyst.

3. The hydrofinishing catalyst of claim 1 , wherein the catalyst has a strength of a Bronsted acid site satisfying the following Expression 5, Expression 6, or Expressions 5 and 6,
(Expression 5)
Amount of Bronsted acid sites measured by adsorption of pyridine at 300° C.≥25 μmol/g,
(Expression 6)
Amount of Bronsted acid sites measured by adsorption of pyridine at 400° C.≥10 μmol/g.

4. The hydrofinishing catalyst of claim 1 , wherein the active metal is one or two or more metals belonging to Groups VI to VIII.

5. The hydrofinishing catalyst of claim 4 , wherein the active metal contains Pd, Pt, or Pd and Pt.

6. The hydrofinishing catalyst of claim 4 , wherein the catalyst contains a first active metal and a second active metal, and a weight ratio of the first active metal to the second active metal is 1.0:0.1 to 1.0.

7. The hydrofinishing catalyst of claim 1 , wherein the catalyst contains 0.1 to 5 wt % of the active metal.

8. A method for producing base oil, comprising:
a step of dewaxing raw oil for producing base oil in the presence of an isomerization catalyst to obtain a catalytic dewaxed oil fraction; and
a step of hydrofinishing the catalytic dewaxed oil fraction using the hydrofinishing catalyst of claim 1 to produce base oil.

Assignees

• Sk Innovation Co Ltd
• Sk Lubricants Co Ltd

Inventors

• Kim Dokyoung
• Lim Seonju
• Kim Dowoan
• Lee Seungwoo
• Lee Yoonkyung

Classifications

• B01J23/42

  Platinum · CPC title

• C10G2300/4012

  Pressure · CPC title

• C10G49/06

  containing platinum group metals or compounds thereof · CPC title

• C10G69/02

  plural serial stages only · CPC title

• C10G45/52

  containing platinum group metals or compounds thereof · CPC title