Catalyst for a hydrodgenation dewaxing process and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9518233-B2
Application number	US-201414306447-A
Country	US
Kind code	B2
Filing date	Jun 17, 2014
Priority date	Apr 14, 2010
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

The present invention relates to a bifunctional catalyst for a hydrodewaxing process with improved isomerization selectivity, and to a method for manufacturing the same, and more particularly to a bifunctional catalyst and to a method for manufacturing same, which is characterized in that EU-2 zeolite with a controlled degree of phase transformation is used as a catalyst support having an acid site. The EU-2 zeolite, the degree of phase transformation of which is controlled, includes, by controlling synthesis parameters of EU-2, predetermined amounts of materials that are phase-transformed from EU-2 crystals such as cristobalite and quartz. The metal loaded bifunctional catalyst according to the present invention improves selectivity of the isomerization process, rather than a cracking reaction, during a hydroisomerization reaction of n-hexadecane. Therefore, the bifunctional catalyst can be widely used as a catalyst for a dewaxing process such as lubricant base oil and diesel oil.

First claim

The invention claimed is:

1. A hydrodewaxing method of a hydrocarbon raw material, wherein the hydrocarbon raw material is hydrodewaxed in the presence of a catalyst under the reaction conditions of a temperature of 250˜420° C., a hydrogen partial pressure of 1˜200 atm, a liquid hourly space velocity of 0.1˜10 h −1 and a hydrogen treatment rate of 250˜10,000 scf/B, wherein the catalyst comprises
an EU-2 zeolite support having an acid site, the phase transition index (T) thereof, represented by Formula 1 below, being 60≦T<98, and the molar ratio of silica and alumina thereof being 20 to 200; and
a metal composition for hydrogenation loaded in the EU-2 zeolite support, the metal composition including at least one metal selected from the group consisting of group VI metals and group VIII metals,
wherein <Formula 1> T=(TGA weight reduction rate of the synthesized EU-2 sample)/(TGA weight reduction rate of pure EU-2 reference sample)×100 (here, the TGA weight reduction rate of the EU-2 sample is measured under the condition that the sample is heated from 120° C. to 550° C. at a heating rate of 2° C./min and then maintained at 550° C. for 2 hours).

2. The hydrodewaxing method of a hydrocarbon raw material according to claim 1 , wherein the metal composition is palladium or platinum.

3. The hydrodewaxing method of a hydrocarbon raw material according to claim 1 , wherein the catalyst further comprises at least one co-catalyst selected from the group consisting of group I metals and group II metals.

4. The hydrodewaxing method of a hydrocarbon raw material according to claim 3 , wherein each of the group I metals and group II metals is selected from sodium, magnesium and calcium.

5. A hydrodewaxing method of a hydrocarbon raw material, wherein the hydrocarbon raw material is hydrodewaxed in the presence of a catalyst under the reaction conditions of a temperature of 250˜420° C., a hydrogen partial pressure of 1˜200 atm, a liquid hourly space velocity of 0.1˜10 h −1 and a hydrogen treatment rate of 250˜10,000 scf/B, wherein the catalyst is prepared by the steps of:
(a) preparing an EU-2 zeolite support, the degree of phase transition of which is controlled such that a phase transition index (T) thereof is 60≦T<98;
(b) loading a active metal composition on the EU-2 zeolite support for hydrogenation, the metal composition including at least one metal selected from the group consisting of group VI metals and group VIII metals; and
(c) drying and calcinating the EU-2 zeolite support loaded with the metal composition, wherein T=(TGA weight reduction rate of the synthesized EU-2 sample)/(TGA weight reduction rate of pure EU-2 reference sample)×100 (here, the TGA weight reduction rate of the EU-2 sample is measured under the condition that the sample is heated from 120° C. to 550° C. at a heating rate of 2° C./min and then maintained at 550° C. for 2 hours).

6. The hydrodewaxing method of a hydrocarbon raw material according to claim 5 , wherein the step (a) comprises the steps of: (i) mixing a template material with an aqueous alkali solution including a silica raw material and an alumina raw material; (ii) reacting the mixture at a temperature of 50˜250° C. to obtain an EU-2 zeolite, the degree of phase transition of which is controlled such that the phase transition index (T) thereof is 60≦T<98; and (iii) washing and drying the EU-2 zeolite.

7. The hydrodewaxing method of a hydrocarbon raw material according to claim 6 , wherein the template material is at least one member selected from the group consisting of alkyl amines, tetramethyl ammonium compounds and di-quaternary ammonium compounds.

8. The hydrodewaxing method of a hydrocarbon raw material according to claim 5 , wherein the step (b) further comprises the step of adding at least one co-catalyst selected from the group consisting of group I metals and group II metals.

9. The hydrodewaxing method of a hydrocarbon raw material according to claim 8 , wherein each of the group I metals and group II metals is selected from sodium, magnesium and calcium.

Assignees

• Sk Innovation Co Ltd

Inventors

• Kim Tae Jin
• Lee Seung Woo
• Lee Yoon Kyung
• Oh Seung Hoon
• Choi Jae Suk

Classifications

• C07C2523/42

  Platinum · CPC title

• C07C5/2775

  with crystalline alumino-silicates, e.g. molecular sieves · CPC title

• C10G2400/04

  Diesel oil · CPC title

• B01J2229/42

  Addition of matrix or binder particles · CPC title

• C10G2400/02

  Gasoline · CPC title