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Thermal coupling method for preparing solvent naphtha from C9 resin flash oil

A solvent oil and flash oil technology, used in hydrocarbon distillation, petroleum industry, etc., can solve the problems of complex components, unsuitable single component, and many active components, and achieve simple process operation, increase added value, and process flow. short effect

Inactive Publication Date: 2012-09-12
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

cleavage C 9 Raw materials are not suitable for single-component use due to their complex components and many active components.

Method used

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  • Thermal coupling method for preparing solvent naphtha from C9 resin flash oil
  • Thermal coupling method for preparing solvent naphtha from C9 resin flash oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Will C 9 Resin flash oil is sent to 150# solvent oil rectifying tower, feed rate 100kg / hr, tower top pressure is 50kPa, tower top temperature is 120 ℃, obtains the 150# solvent oil that final boiling point is 150 ℃ by tower top; The pressure at the top of the 180# solvent oil rectifying tower is 5kPa, the temperature at the bottom of the tower is 105°C, and the 180# solvent oil with a final boiling point of 180°C is obtained from the top of the tower. The operating pressure of the 150# solvent oil rectification tower is higher than that of the 180# solvent oil rectification tower, so that the temperature of the reboiled material in the 180# solvent oil rectification tower is lower than that of the top material of the 150# solvent oil rectification tower Therefore, the matching heat exchange of the two materials can be used to realize the thermal coupling of the two towers. In this embodiment, the heat provided by condensation at the top of the 150# solvent oil rectific...

Embodiment 2

[0025] Will C 9 Resin flash oil is sent to 150# solvent oil rectifying tower, feed rate 150kg / hr, tower top pressure is 101kPa, and tower top temperature is 142 ℃, obtains the 150# solvent oil that final boiling point is 150 ℃ by tower top; The pressure at the top of the 180# solvent oil rectifying tower is 20kPa, the temperature at the bottom of the tower is 120°C, and the 180# solvent oil whose final boiling point is 180°C is obtained from the top of the tower. The operating pressure of the 150# solvent oil rectification tower is higher than that of the 180# solvent oil rectification tower, so that the temperature of the reboiled material in the 180# solvent oil rectification tower is lower than that of the top material of the 150# solvent oil rectification tower Therefore, the thermal coupling of the two towers is realized by using the matched heat exchange of the two materials. In this embodiment, the heat provided by condensation at the top of the 150# solvent oil rectif...

Embodiment 3

[0027] According to the above technical scheme, the C 9Resin flash oil is sent to 150# solvent oil rectifying tower, feed rate 200kg / hr, tower top pressure is 150kPa, and tower top temperature is 160 ℃, obtains the 150# solvent oil that terminal boiling point is 150 ℃ by tower top; The pressure at the top of the 180# solvent oil rectifying tower is 30kPa, and the temperature at the bottom of the tower is 140°C, and the 180# solvent oil whose final boiling point is 180°C is obtained from the top of the tower. In this embodiment, the heat provided by condensation at the top of the 150# solvent oil rectifying tower fully matches the heat required for the rising and reboiling steam at the bottom of the 180# solvent oil rectifying tower, without opening the auxiliary condenser or auxiliary reboiler. The heating energy consumption is reduced by 44.7% compared with the conventional heat-free coupling rectification.

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Abstract

A thermal coupling method for preparing a solvent naphtha from C9 resin flash oil includes the following steps: a C9 resin flash oil is guided into a 150# solvent naphtha distillation tower; liquid phase materials obtained at the bottom of the tower is put into a 180# solvent naphtha distillation tower; steam obtained at the top of the tower is put into a main reboiler of the 180# solvent naphtha distillation tower, and by heat exchange, heat needed for rise re-boiling steam from the bottom of the 180# solvent naphtha distillation tower is formed, with insufficient or excessive amounts being adjusted by an auxiliary reboiler or an auxiliary condenser installed, and then is returned to an backflow storage tank of the 150# solvent naphtha distillation tower; a part of condensate liquid flowed out from the backflow storage tank of the 150# solvent naphtha distillation tower is extracted as a 150# solvent naphtha while another part of the condensate liquid is an backflow liquid of the top of the 150# solvent naphtha distillation tower; the 180# solvent naphtha is obtained at the top of 180# solvent naphtha distillation tower; and heavy ends obtained at the bottom of the tower is drained away. The thermal coupling method for preparing a solvent naphtha from C9 resin flash oil has a short procedure, simple technological operation, and a low cost of equipment investment.

Description

technical field [0001] The invention relates to the technical field of chemical product production, and relates to a 9 A thermally coupled method for the preparation of mineral spirits from resin flash oil. Specifically, a C 9 Method for preparing 150# and 180# solvent oil from resin flash oil. Background technique [0002] Solvent oil is one of the five major categories of petroleum products and has a wide range of uses, especially in the field of paint solvent oil. According to the chemical structure, solvent oil can be divided into three types: paraffins, naphthenes and aromatics. At present, about 30% of the world's organic solvents are petroleum solvents, of which C 9 and C 9 The above-mentioned high-boiling-point aromatic solvent oil accounts for about 14.8%, and the demand is increasing day by day. due to C 9 Aromatics have a higher boiling point than the commonly used solvents benzene, toluene and xylene, slow volatilization, and strong solubility. Foreign oil...

Claims

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Application Information

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IPC IPC(8): C10G7/00
Inventor 许长春孙永利李洪罗伟隋红陈炳琳阚一群何开
Owner TIANJIN UNIV
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