Hydroisomerization and cracking catalyst for preparing biological aviation kerosene from castor oil

Patent metadata

Field	Value
Publication number	US-10399069-B2
Application number	US-201815888019-A
Country	US
Kind code	B2
Filing date	Feb 3, 2018
Priority date	Aug 3, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The present invention relates to a hydroisomerization and cracking catalyst for preparing biological aviation kerosene from castor oil as well as a preparation method and an application thereof. The catalyst takes a Al-modified titanium silicate molecular sieve (TS-1) as a carrier, and takes Ni x W and Ni x Mo as active components, wherein x is the atomic ratio of Ni to W or Ni to Mo, and x=5-10, wherein the mass of the active components accounts for 5-30% of the total mass of the catalyst; the molar ratio of Si:Ti in the Al-modified titanium silicate molecular sieve is 50-100, and the molar ratio of Si:Al is 50-100.

First claim

We claim:

1. A preparation method of a hydroisomerization and cracking catalyst for preparing biological aviation kerosene from castor oil, the catalyst comprising titanium silicate molecular sieve (TS-1) as a carrier, and NixW and NixMo as active components, wherein x is an atomic ratio of Ni to W or Ni to Mo, and x=5-10, Al is removed partially from the carrier, and a mass of the active components accounts for 5-30% of a total mass of the catalyst, the preparation method comprising following steps:
1) thoroughly stirring and mixing an aqueous solution of tetrapropylammonium hydroxide with a tetraethoxysilane solution at a temperature of 40-55° C. for 0.5-2 h, then adding an isopropanol solution of tetrabutyl titanate to obtain a mixed solution, and then adding aluminium isopropoxide and continuously stirring for 1-3 h;
2) heating, stirring and refluxing the above mixed solution in a water bath with a constant temperature of 75-85° C. for 1-3 h to remove the isopropanol from the solution, and then complementing the mass of the solution obtained after refluxing to the value before heating, stirring and refluxing by using deionized water;
3) transferring the above solution into a high pressure reaction kettle to conduct aging at 95-105° C. for 4-6 h, then heating to 150-180° C. to conduct crystallization for 6-36 h to obtain a sample, taking out and washing the sample with deionized water until neutral, calcining in a muffle furnace at 500-550° C. for 4-6 h after drying, cooling to room temperature and then placing into an HCl solution of 0.5 mol/L, and heating, stirring and refluxing at 50-60° C. for 1-5 h;
4) separating the sample through suction filtration, washing with deionized water until neutral, and after drying, calcining at 500-550° C. for 2-4 h under a nitrogen atmosphere to obtain the carrier;
5) sequentially adding nickel nitrate, and ammonium metatungstate, or adding nickel nitrate an ammonium molybdate, into an aqueous solution of urea according to a ratio under room-temperature stirring conditions, stirring for 0.5-1 h until completely dissolved, then adding the carrier and stirring for at least 2 h, and drying the mixture in a rotary evaporator at 80-90° C. to obtain solid powder; and
6) calcining the solid powder in an air atmosphere at 550-600° C. for at least 2 h, then reducing at 550-600° C. at a hydrogen flow rate of 200-300 mL/min for at least 3 h, cooling to room temperature, and then passivating with O 2 /N 2 passivating gases at a volume ratio of 1% for 3 hours to obtain the desired catalyst.

2. The method according to claim 1 , wherein a ratio of materials in steps 1) to 2) is SiO 2 :TiO 2 :TPAOH:aluminium isopropoxide:isopropanol:H2O=1:(0.01-0.02):(0.1-0.4):(0.01-0.02):(0.1-0.5):(20-100).

3. The method according to claim 1 , wherein an added amount of the urea in step 5) is 2-5% of the mass of the carrier.

4. The method according to claim 1 , wherein an added amount of the urea in step 5) is 2-3% of the mass of the carrier.

Assignees

• Univ Nankai
• Tianjin Nankai Univ Castor Engineering Science And Technology Co Ltd
• Tianjin Bineng Science And Tech Co Ltd

Inventors

• Li Wei
• Ni Baoxia
• Guan Qingxin
• He Liangnian
• Ye Feng
• Cui Xiaoying

Classifications

• C10G65/12

  including cracking steps and other hydrotreatment steps · CPC title

• C10G3/49

  containing crystalline aluminosilicates, e.g. molecular sieves · CPC title

• B01J37/00

  Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts · CPC title

• B01J23/883

  and nickel · CPC title

• B01J23/85

  Chromium, molybdenum or tungsten · CPC title