Lignocellulose nanofibril material, stable foam system based thereon, preparation method and application thereof

Patent metadata

Field	Value
Publication number	US-11339254-B2
Application number	US-201916762918-A
Country	US
Kind code	B2
Filing date	Apr 15, 2019
Priority date	Mar 4, 2019
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A lignocellulose nanofibril material, a stable foam system based thereon, a preparation method and an application thereof are provided. The lignocellulosic nanofibril material includes the following components: 0.5-20 wt % of wood flour, 0.1-10 wt % of (2,2,6,6-tetramethylpiperidin-1-yl)oxidanyl, 2-25 mmol/g of an oxidant, 6-15 wt % of NaBr, and the remaining is water. The stable foam system based on the lignocellulosic nanofibril material includes: 0.1-1.0 wt % of the lignocellulosic nanofibril material, 0.2-1.0 wt % of a surfactant, 0.1-10 wt % of sodium chloride, 0.1-1.0 wt % of calcium chloride, 0.1-1.0 wt % of magnesium chloride, 0.1-1.0 wt % of sodium sulfate, and a balance of water.

First claim

What is claimed is:

1. A stable foam system based on a lignocellulosic nanofibril material, comprising: 0.1-1.0 wt % of the lignocellulosic nanofibril material, 0.2-1.0 wt % of a surfactant, 0.1-10 wt % of sodium chloride, 0.1-1.0 wt % of calcium chloride, 0.1-1.0 wt % of magnesium chloride, 0-0.04 wt % of sodium sulfate, and a balance of water;
wherein the lignocellulosic nanofibril material comprises:
0.5-20 wt % of wood flour, 0.1-10 wt % of (2,2,6,6-tetramethylpiperidin-1-yl)oxidanyl TEMPO), 2-25 mmol/g of an oxidant, 6-15 wt % of NaBr, and a balance of water.

2. The stable foam system based on the lignocellulosic nanofibril material according to claim 1 , comprising: 0.1 wt % of the lignocellulosic nanofibril material, 0.4 wt % of the surfactant, 3.44 wt % of the sodium chloride, 0.64 wt % of the calcium chloride, 0.18 wt % of the magnesium chloride, 0.018 wt % of the sodium sulfate, and a balance of water.

3. The stable foam system based on the lignocellulosic nanofibril material according to claim 1 , wherein the surfactant is a mixture of sodium secondary alkyl sulfonate and α-alkenyl sulfonate in a molar ratio of 1:1.

4. The stable foam system based on the lignocellulosic nanofibril material according to claim 1 , wherein the stable foam system is applied in an oil field exploitation.

5. The stable foam system according to claim 1 , wherein the lignocellulosic nanofibril material comprises 15 wt % of the wood flour, 5 wt % of the TEMPO, 10 mmol/g of the oxidant, 12 wt % of the NaBr, and a balance of water.

6. The stable foam system according to claim 1 , wherein the wood flour has a particle size of 20-120 mesh, and the oxidant is NaClO or NaClO 2 .

7. The stable foam system based on the lignocellulosic nanofibril material according to claim 2 , wherein the surfactant is a mixture of sodium secondary alkyl sulfonate and α-alkenyl sulfonate in a molar ratio of 1:1.

8. The stable foam system based on the lignocellulosic nanofibril material according to claim 2 , wherein the stable foam system is applied in an oil field exploitation.

9. The stable foam system based on the lignocellulosic nanofibril material according to claim 3 , wherein the stable foam system is applied in an oil field exploitation.

Assignees

• Univ Southwest Petroleum
• Tianjin Univ Of Science And Technology

Inventors

• Wei Bing
• Wen Yangbing
• Wang Yuanyuan
• Pu Wanfen
• Chen Shengen

Classifications

• C08J2397/02

  Lignocellulosic material, e.g. wood, straw or bagasse · CPC title

• C08B15/04

  Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide · CPC title

• C08J9/30

  by mixing gases into liquid compositions or plastisols, e.g. frothing with air · CPC title

• C09K8/94

  Foams · CPC title

• C09K8/38

  Gaseous or foamed well-drilling compositions · CPC title