Trimetallic base metal dewaxing catalyst

Patent metadata

Field	Value
Publication number	US-10632453-B2
Application number	US-201815902211-A
Country	US
Kind code	B2
Filing date	Feb 22, 2018
Priority date	Mar 3, 2017
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

Methods, catalysts, and corresponding catalyst precursors are provided for performing dewaxing of diesel or distillate boiling range fractions. The dewaxing methods, catalysts, and/or catalyst precursors can allow for production of diesel boiling range fuels with improved cold flow properties at desirable yields. The catalysts and/or catalyst precursors can correspond to supported base metal catalysts and/or catalyst precursors that include at least two Group 8-10 base metals supported on the catalyst, such as a catalyst/catalyst precursor including both Ni and Co as supported metals along with a Group 6 metal (i.e., Mo and/or W). The support can correspond to a support including a zeolitic framework structure. The catalyst precursors can be formed, for example, by impregnating a support including a zeolitic framework structure with an impregnation solution that also includes a dispersion agent.

First claim

The invention claimed is:

1. A catalyst precursor comprising at least two Group 8-10 base metals, at least one Group 6 metal, and a dispersion agent supported on a support comprising a zeolitic framework structure having a 10-member ring as a largest pore channel, the catalyst precursor having a molar ratio of a first Group 8-10 base metal to a second Group 8-10 base metal of 0.1 to 10, a molar ratio of the at least two Group 8-10 base metals to the at least one Group 6 metal of 0.1 to 1.0, and a molar ratio of dispersion agent to the at least two Group 8-10 base metals and the at least one Group 6 metal of 0.5 to 3.0.

2. The catalyst precursor of claim 1 , wherein the zeolitic framework structure comprises ZSM-48, ZSM-11, an MEL framework structure, an MRE framework structure, or a combination thereof.

3. The catalyst precursor of claim 2 , wherein the zeolitic framework structure comprises an MEL framework structure, the zeolitic framework structure further comprising a) a molar ratio of silica to alumina of about 35 to about 55; b) an alpha value of at least about 380; c) a total surface area of at least about 350 m 2 /g, or d) a combination thereof.

4. The catalyst precursor of claim 1 , wherein the catalyst precursor comprises about 2.0 wt % to about 30 wt % of the at least one Group 6 metal and at least two Group 8-10 base metals based on a weight of the catalyst precursor, the at least two Group 8-10 base metals optionally comprising Ni and Co, the at least one Group 6 metal optionally comprising W, Mo, or a combination thereof.

5. The catalyst precursor of claim 1 , wherein the dispersion agent comprises a compound having 2-10 carbon atoms and a carbon atom to oxygen atom ratio of about 0.6 to about 2.0.

6. The catalyst precursor of claim 1 , wherein the dispersion agent comprises a glycol, a carboxylic acid, or a combination thereof.

7. The catalyst precursor of claim 1 , wherein the dispersion agent comprises citric acid, gluconic acid, nitrilotriacetic acid, ethylene glycol, or a combination thereof.

8. The catalyst precursor of claim 1 , wherein the support further comprises an alumina binder, the alumina binder optionally having a surface area of about 150 m 2 /g or less.

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Bai Chuansheng
• Podsiadlo Paul
• Mccarthy Stephen J

Classifications

• B01J29/48

  containing arsenic, antimony, bismuth, vanadium, niobium tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium · CPC title

• C10G2400/10

  Lubricating oil · CPC title

• B01J37/20

  Sulfiding · CPC title

• B01J37/0009

  Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst · CPC title

• C10G45/50

  in combination with chromium, molybdenum or tungsten metal, or compounds thereof · CPC title