Process for preparing pentane from light C5 distillate

A technology for carbon five fraction and pentane, which is applied in the field of pentane preparation, can solve the problems of affecting service performance, incomplete hydrogenation of straight-run gasoline, complex composition of condensate and light naphtha, etc. The effect of improving the value of economic use

Inactive Publication Date: 2005-11-23
SINOPEC SHANGHAI PETROCHEMICAL CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

However, due to the complex composition of condensate oil and light naphtha, distillation and separation are difficult, and there are many residual unsaturated hydrocarbons in the final product
When straight-run gasoline is used as raw material to separate pentane, due to the incomplete hydrogenation of straight-run gasoline, it can only produce pentane products with a bromine index of about 100, which will affect its performance.

Method used

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  • Process for preparing pentane from light C5 distillate
  • Process for preparing pentane from light C5 distillate
  • Process for preparing pentane from light C5 distillate

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Embodiment 1～17

[0029] The technological process of the preparation process is shown in the accompanying drawing.

[0030] Among them, the hydrogenation reactor 1 is a stainless steel tubular reactor, including a reaction tube of φ25mm×1000mm, filled with 100ml of catalyst in the reaction tube, and the catalyst uses Ni as the active component, Al 2 o 3 with SiO 2 The mixture is used as a carrier, and the Ni content is 30-55wt%. The bottom of the reactor is filled with inert ceramic balls.

[0031] Adsorption reactor 2 is a stainless steel tubular reactor, including a φ25mm×1000mm reaction tube, filled with granular clay, the granular clay has a particle size of 20-60 mesh, acidity ≤ 2.5KOHmg / g, and a packing density of 0.65- 0.70g / ml.

[0032] After being preheated, the light C5 fraction material S1 is sent to the hydrogenation reactor 1 from the top at a set rate by a pump, and the hydrogen enters the reactor through the gas distributor, and the light C5 fraction material is mixed with h...

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PUM

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Abstract

Disclosed is a process for preparing pentane from light C5 distillate which comprises the steps of, subjecting light C5 distillate to hydrogenation reaction through catalyst fixed bed, the reaction pressure being 1.0-3.0 MPa, the reaction temperature being 15-35 deg. C, the mol ratio of hydrogen and total amount of unsaturated hydrocarbons in the C5 distillate being 1-5, the liquid hourly space velocity of the material being 1.0-5.0hr-1, the catalyst being loading type using Ni as active component, and using the mixture of Al2O3 and SiO2 as the carrier, passing particulate clay fixed bed at 150-170 deg. C so as to remove the residual unsaturated hydrocarbons, the liquid hourly space velocity of the material being 1.0-5.0hr-1, then removing light distillate through distillation segregation, the tower still temperature being 90-100 deg. C, the tower top temperature being 55-60 deg. C, the absolute pressure in the tower being 0.50-0.60 MPa, the reflux ratio being 2.5-3.5.

Description

technical field [0001] The invention relates to a method for preparing pentane by using light carbon five fractions as raw materials, in particular to a method for preparing pentane by hydrogenating and removing unsaturated hydrocarbons from the light carbon five fractions. Background technique [0002] Pentane is generally a mixture of isopentane and n-pentane. It is an ideal foaming agent for polystyrene materials and can be used to replace Freon, because pentane does not have any damage to the atmospheric ozone layer. At the same time, pentane can also be used as molecular sieve desorbing agent, industrial solvent, extraction agent and chemical raw material, etc., and it is widely used in the chemical industry. [0003] In the prior art, pentane usually utilizes C 4 ~C 6 It is refined from light hydrocarbons of saturated alkanes, including condensate, light naphtha and straight-run gasoline. However, due to the complex composition of condensate oil and light naphtha, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/14
Inventor 徐泽辉杨忠保谢家明高进曹强夏蓉晖
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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