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Method for separating naphthenic acid from mixed organic matter

A technology of middle naphthenic acid and naphthenic acid, which is applied in the preparation of organic compounds, separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of alkali residue polluting the environment, large consumption of acid and alkali, and inability to recycle. , to achieve the effect of increasing the processing capacity, increasing the recovery rate, and increasing the added value of production

Active Publication Date: 2019-11-05
CHINA MINMETALS BEIJING RES INST OF RE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to solve the problems of serious emulsification in the recovery process of alkali washing of conventional naphthenic acid, difficulty in handling the environment polluted by alkali slag, and large consumption of acid and alkali so that it cannot be recycled and utilized, and to provide a kind of mild condition, low cost and environment-friendly A new green method to separate and recover naphthenic acid from mixed organic matter and increase its concentration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for separating naphthenic acids from mixed organic matter, comprising the steps of:

[0042] 1) Separation of naphthenic acid by microemulsion method: take 1L of old naphthenic acid extractant (English name Naphthenic Acid, abbreviated as HA) after extracting rare earth and aging in a heatable container, and recover the alkali solution under heating conditions a2 was mixed at 25°C for 1 min at a ratio of 3:1 to form a uniform microemulsion. Oh - The amount added is 150% of the theoretical amount of neutralization of HA, and the phases are separated after standing, and the aqueous phase a1 and the organic phase 01 are released after standing;

[0043] 2) Recovery of naphthenic acid: Mix the aqueous phase a1 after primary mixing with the alkali solution of monovalent cations in a ratio of 10:1 at 25° C. for 1 min, let stand to separate the phases, and release the aqueous phase a2 and the organic phase 02; The added monovalent cation is Na + ,OH - The amount a...

Embodiment 2

[0048] 1) Separation of naphthenic acid by microemulsion method: take 100L of petroleum distillate oil containing naphthenic acid HA in a heatable container, and under heating conditions, the organic matter and the recovered alkali solution a2 are compared at a ratio of 1:10 at 85°C Mix for 60 minutes to form a uniform microemulsion. Oh - The amount added is 120% of the theoretical amount of neutralization of HA, and the phases are separated after standing, and the aqueous phase a1 and the organic phase 01 are released after standing;

[0049] 2) Recovery of naphthenic acid: Mix the aqueous phase a1 and the alkali solution of monovalent cations in a ratio of 3:1 at 85°C for 60 minutes after the primary mixing, let stand to separate the phases, and release the aqueous phase a2 and the organic phase 02; The added monovalent cation is K + ,OH - The amount added is 150% of the theoretical amount of all neutralized HA;

[0050] 3) Repeat the above 1), 2) steps;

[0051] The se...

Embodiment 3

[0054] 1) Separation of naphthenic acid by microemulsion method: take 1L of the aged extractant, that is, the organic matter containing naphthenic acid HA, alcohol, and kerosene in a heatable container, and under the condition of heating, the organic matter and the recovered lye a2 are separated according to phase The ratio of 1:1 was mixed at 60°C for 30 minutes to form a uniform microemulsion. Oh - The amount added is 80% of the theoretical amount of neutralization of HA, and the phases are separated after standing, and the aqueous phase a1 and the organic phase 01 are released after standing;

[0055] 2) Recovery of naphthenic acid: Add NaOH solid directly to the aqueous phase a1 after primary mixing, mix at 65°C for 20 minutes, let stand to separate the phases, release the aqueous phase a2 and the organic phase 02; OH - The amount added is 120% of the theoretical amount of all neutralized HA;

[0056] 3) Repeat the above 1), 2) steps;

[0057] The separated organic phas...

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Abstract

The invention relates to a method for separating a naphthenic acid from mixed organic matter. The method comprises the steps that (1) the naphthenic acid is separated through a microemulsion method, organic matter 0 containing the naphthenic acid is taken to a heatable container, under a condition of heating, the organic matter 0 and circulating water phase a2 solution are mixed at 25-85 DEG C for1-60min at a ratio of 3:1-1:10 in 25-85, and after mixed reaction, a mixed solution is split into phases by standing and then separated to obtain organic phase 01 and the aqueous phase a1; (2) the naphthenic acid is recycled, the aqueous phase a1and alkali B of a monovalent cation are mixed at a ratio of 10:1-3:1 for 1-60min at the temperature of 25-85 DEG C, and after the mixing reaction, a mixed solution is split into phases by separating, and organic phase 02 and the circulating aqueous phase a2 are obtained; and (3) the above step (1) and step (2) are repeated. According to the method forseparating the naphthenic acid from the mixed organic matter, the condition is mild, the cost is low, environmental friendliness is achieved, all alkaline solutions are recycled, and no waste water is discharged.

Description

technical field [0001] The invention belongs to the technical field of environmental protection recovery, in particular to a comprehensive utilization method for separating naphthenic acid from mixed organic matter, more specifically to a method for separating naphthenic acid from mixed organic matter. Background technique [0002] Naphthenic acid is a carboxylic acid compound produced in the process of refining crude oil, which contains one or more cycloalkyl rings, and is a viscous liquid that is less volatile and has a molecular weight of about 200-700. The presence of naphthenic acids has a serious impact on the refining and processing of distillate oils. For example, when the acid value of the oil exceeds 2 mg / g, the distillation trays, heat exchangers and pipelines are in danger of being corroded and perforated at any time, which increases the number of unplanned shutdowns and reduces production efficiency; The processing is complicated, and the life of the subsequent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C51/42C07C61/08
CPCC07C51/412C07C51/42C07C2601/14C07C61/08
Inventor 廖春生王嵩龄吴声程福祥
Owner CHINA MINMETALS BEIJING RES INST OF RE
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