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Polysaccharide microgels for cleaning water of petroleum and petroleum products and method for using same (variants)

A technology of microgel and PetroChina, applied in chemical instruments and methods, separation methods, general water supply saving, etc., can solve problems such as recovery, separation efficiency decline, and component pollution, so as to improve environmental cleanliness and reduce environmental pollution. The effect of destroying and simplifying the collection process

Active Publication Date: 2015-05-27
尼波比奥米克罗格利有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The main disadvantage of this separation system is the complex design and periodic recovery of all its components due to the clogging of the pores of the first two layers
At the same time, only hydrophilic membranes cannot be used, because the surface of hydrophilic fibers is easily polluted by the components of the separated oil, such as high molecular hydrocarbons in crude oil and petroleum products
Therefore, the separation efficiency will drop sharply
The second problem is that as the pressure increases or the layer of liquid above the filter thickens, oil droplets can punch through the pores of the filter, causing the separated liquid to remix
[0018] The known disadvantage of this composition is that carboxymethyl yeast cannot independently induce oil condensation, so it has to be precipitated using polyvalent metal salts, which can be problematic for later recovery
[0019] The common disadvantage of all the above-mentioned methods and known substances is that they cannot be regenerated and restored into industrial products, and the recovery of residues is also complicated
After using the adsorbent (coagulant), the collected petroleum and petroleum products cannot be separated, and they cannot be regenerated and reused. Therefore, the disposal of the resulting residue has become an acute problem, either necessary incineration, or stored in a special The place

Method used

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  • Polysaccharide microgels for cleaning water of petroleum and petroleum products and method for using same (variants)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Chitosan (1 g) with a degree of deacetylation of 95% and a molecular weight of 200,000 D was dissolved in 1 liter of 0.01 M hydrochloric acid. To this solution was added 0.05M sodium hydroxide until the pH was 6.8. The prepared chitosan microgel suspension with a particle size of 150-200 nanometers and a concentration of 1 gram per liter is directly used to contain underwater oil spills.

Embodiment 2

[0057] The microcrystalline cellulose produced by acid hydrolysis at a temperature of 75-85° C. for 15 minutes in the presence of hydrochloric acid (concentration: 25%) with a bath ratio of 20 has a molecular weight of 42000 D. Dissolve the cellulose in a 5% system composed of 8% sodium hydroxide, 5% urea and 87% water at a temperature of -5-0°C. The amount of insoluble precipitate was 0%. A solution of monochloroacetic acid (concentration of 25%) added to the solution and a molar ratio of monochloroacetic acid / cellulose basic unit of 1.5:1. The solution was incubated at a temperature of 25°C for 24 hours. The final degree of alkylation substitution of the cellulose was 25%. The particle size of the microgel is 250-300 nm. The solution was diluted with distilled or tap water to a concentration of 0.1 g / l and used to condense suspended particulate matter of petroleum. The pH of this solution is 10.

Embodiment 3

[0059] Pectin (5 g) with a degree of methoxylation of 15% and a molecular weight of 20000D was dissolved in 1 liter of sodium hydroxide (2 g / l) solution. The resulting solution was titrated with 0.2% hydrochloric acid until the solution became cloudy (pH 6.0-6.5). The prepared chitosan microgel suspension with a particle size of 200-250 nanometers and a concentration of 5 g / L was used to contain underwater oil spills.

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Abstract

The group of inventions relates to the field of organic chemistry and can be used for cleaning water, industrial and domestic waste water or waste water sediment, and for the containment and recovery of petroleum and petroleum product spills in large bodies of water, rivers, lakes and seas. In the claimed group of inventions, aqueous solutions of polysaccharide microgels, having a molecular mass of 20000-200000 daltons and a particle size of 50-600 nm, are used as a substance for cleaning water of petroleum and petroleum products. Moreover, low concentrations of polysaccharide microgels in water, ranging from 0.1 to 20 g / l, are used. Said solutions are used as a surface modifier for a filter used in separating water-oil emulsions, as a sorbent for the containment and recovery of oil spills in an aqueous medium, and also as a coagulant for the cleaning of water polluted by petroleum and petroleum products. The technical result is in making it possible to recover a commercial product, recovered during the process of cleaning water of petroleum or petroleum products, and to recover the starting substance for the reuse thereof, while simultaneously simplifying the slurry utilization process.

Description

technical field [0001] This group of inventions relates to the field of organic chemistry and can be used to purify water, industrial and domestic waste water or other waste water, and to contain and collect oil spills on large reservoirs, rivers, lakes and seas. Background technique [0002] A wide variety of substances are available that can be used to remove oil and oil products from water. These substances can contain both organic and inorganic components. Most of them are solid particles with high specific surface area that can adsorb or absorb petroleum and petroleum products. There are also substances that can coalesce droplets of petroleum and petroleum products. This substance can be used to separate mixtures of petroleum and petroleum products with water. The most well-known of these methods are the following: [0003] - Filtration of a mixture of two immiscible liquids, thereby separating it into two phases. This method has higher performance, but the hardwar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/28C02F1/40B01J20/24B01D17/04E02B15/00C02F101/32
CPCB01D17/0202B01D17/047C02F1/285C02F1/5272C02F1/56C02F1/681E02B15/041C02F2103/10C02F2103/007C02F2101/32C02F2101/20C02F2103/365C02F2305/08C02F2303/16C02F1/385C02F1/66B01J20/24B01J20/28004B01J20/28047Y02A20/204C02F1/001C02F1/286
Inventor 伊莱恩·安德烈·亚历山德罗维奇米罗诺夫·马克西姆·阿纳托尔波诺马廖夫·弗拉季斯拉夫·谢尔盖耶维奇
Owner 尼波比奥米克罗格利有限责任公司
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