A high flash point oily sludge extractant

Abstract

The invention discloses an oil-containing sludge extraction agent with a high flashing point and a low boiling point. The oil-containing sludge extraction agent comprises 70 to 90 parts of a main agent by weight and 5 to 30 parts of an auxiliary agent by weight, wherein the main agent is an organic solvent with a high flashing point, a high boiling point and certain oil dissolving capability; the auxiliary agent is an alkane type organic solvent. The oil-containing sludge extraction agent has the advantages that the flashing point is high, and the boiling point is low; the oil washing capability is higher, and the toxicity, volatility and irritation are low; the defect of failure to reach the physical property of high flashing point and low boiling point in the traditional solvent is overcome; the oil-containing sludge extraction agent is a second A-class combustible liquid according to the fire hazard types of liquefied hydrocarbon and combustible liquid of Fire Prevention Code of Petrochemical Enterprise Design; the safety level is 2 to 3 levels more than the safety level of the traditional solvent, and the safety guarantee in the operation process is greatly improved.

Description

technical field [0001] The invention relates to an extractant, in particular to a high-flash point extractant for oily sludge extraction, and belongs to the field of oil field chemistry. Background technique [0002] At present, in my country's petrochemical industry, an average of 800,000 tons of oily sludge is produced every year, which has caused enormous pressure on the environment. According to the country's treatment orientation for this kind of hazardous waste, recycling will be the ultimate goal. At the same time, this kind of sludge has a high oil content and a high recycling value. However, this oily sludge has complex components and is difficult to recycle. Disposal costs are high and difficult to treat thoroughly. At present, the main resource treatment methods of oily sludge include extraction method, coking method, steam method, freezing method, biological method, pyrolysis method and so on. The oil sludge extraction method is a method of recycling crude oil ...

AI Technical Summary

Problems solved by technology

Such high-boiling-point solvent oil not only consumes a lot of electric energy and has extremely low recovery efficiency in the solvent recovery process, but also cannot completely recover the solvent without the guarantee of high-boiling point equipment, which will greatly increase the industrial cost. Solvent distillation recovery is complete, and the recovered solvent will contain a large amount of waste oil, making the solvent impure and unable to be reused many times

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