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Continuous preparing method for petroleum sulfosalt

A technology of petroleum sulfonate and sulfonating agent, which is applied in the direction of organic chemistry, etc., can solve the problems of difficult flow, uneven reactor wall, difficult membrane type continuous sulfonation method, etc.

Inactive Publication Date: 2004-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But even if the above-mentioned components are added, if the petroleum fraction is not refined in advance, the acid residue is still difficult to avoid completely (US4148821 example 1-5)
The presence of acid slag will cause unevenness of the reactor wall, resulting in uneven sulfonation reaction, deterioration of product quality, and in serious cases, the reactor will be blocked
In addition, although the added component is a by-product of oxo synthesis, its price is much higher than that of raw oil, which will greatly increase the production cost of sulfonate
[0005] In summary, although the continuous sulfonation method is a method with high production efficiency, stable product quality, and suitable for large-scale production, it is not easy for petroleum distillate oil, especially when the raw oil fraction is heavy and difficult to flow. Direct membrane continuous sulfonation method

Method used

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  • Continuous preparing method for petroleum sulfosalt

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Effect test

example 1

[0019] The raw material oil is straight run oil of Gudao crude oil, the sum of aromatics and colloid content (measured by column separation method) is 41.2%, and the freezing point and boiling point range are shown in Table 1. A 2:1 mixture (weight ratio) of raw oil and dichloroethane is injected into the first sulfonation reactor with a flow rate of 1800 g / hr by a metering pump. The sulfonating agent is a 25% sulfur trioxide solution diluted with dichloroethane, which is sent into the first to the fourth sulfonation reactors with a ratio of 40:25:25:10 with a metering pump, and the total flow is 1296g / h (sulfur trioxide: raw oil=0.27, weight ratio). The temperature of the first to fourth sulfonation reactors is controlled at -5°C, +5°C, +5°C and +15°C respectively, and the total residence time of materials in the four sulfonation reactors is 2hr. After the material flowing out of the device is neutralized with ammonia water to pH = 7, it is distilled at 130°C, the water is ...

Embodiment 2

[0022] The raw material oil is the aromatic fraction extracted from Liaohe crude oil. The sum of aromatic hydrocarbon and colloid content (measured by column separation method) is 75.7%. The freezing point and boiling point range are shown in Table 1. The mixture of raw oil and dichloroethane (2:1, weight ratio) is injected into the first sulfonation reactor with a metering pump, and the flow rate is 1800g / hr. The sulfonating agent is a 25% sulfur trioxide solution diluted with dichloroethane, which is sent into the first to the fourth sulfonation reactors with a ratio of 40:25:25:10 with a metering pump, and the total flow is 1728g / hr (sulfur trioxide: raw oil = 0.36, weight ratio). The temperatures of the first to fourth sulfonation reactors are all controlled at +5°C. All the other steps obtain the sulfonate product by example 1, and test the oil-water interfacial tension by the steps described in example 1 with the XZD-3 type interfacial tensiometer. The results are sho...

Embodiment 3

[0024] The feedstock oil is the aromatic fraction extracted from the normal third-line fraction of Iranian crude oil. The sum of aromatic hydrocarbon and colloid content (measured by column separation method) is 69.1%. The freezing point and boiling point range are shown in Table 1. The mixture of raw oil and dichloroethane (2:1, weight ratio) is injected into the first sulfonation reactor with a metering pump, and the flow rate is 1800g / hr. The sulfonating agent is a 25% sulfur trioxide solution diluted with dichloroethane, which is sent into the first to the fourth sulfonation reactors with a ratio of 50:20:20:10 with a metering pump, and the total flow rate is 1440g / hr (sulfur trioxide: raw oil = 0.30, weight ratio). All the other steps obtain the sulfonate product by example 1, and test the oil-water interfacial tension by the steps described in example 1 with the XZD-3 type interfacial tensiometer. The results are shown in Table 2.

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Abstract

A process for continuously preparing petroleum sulfonate with serially connected 2-8 sulfonating reactors includes such steps as feeding the crude oil and sulfonating agent respectively in the first reactor, sulfonating reacting, feeding the resultant mixture in the second reactor, and so on, and neutralizing the sulfonic acid discharged from the last reactor to obtain petroleum sulfonate. Its advantage is high sulfonating rate.

Description

technical field [0001] The invention belongs to a preparation method of petroleum sulfonate, specifically refers to a method for continuously preparing sulfonate by sulfonating crude oil, distillate oil, secondary processed distillate oil or distillate oil rich in aromatic hydrocarbon extracted therefrom. technical background [0002] There have been some reports on the preparation of petroleum sulfonate by sulfur trioxide sulfonation of crude oil, straight-run distillate oil, secondary processed distillate oil or aromatics extracted therefrom, most of which are homogeneous tank-type batch sulfonation methods. The sulfonation reaction speed is very fast, and the contact time between raw material oil and sulfur trioxide is very short, even less than 1 minute (see CN1275431). However, the heat of sulfonation reaction is not easily discharged in the batch-type tank reaction. In order to maintain a low sulfonation temperature, the sulfonating agent can only be added slowly, whic...

Claims

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Application Information

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IPC IPC(8): C07C309/02
Inventor 彭朴周勇葸雷段启伟倪璇宇秦冰
Owner CHINA PETROLEUM & CHEM CORP
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