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A method for catalytic hydrogenation of tail gas from a rubber factory

A catalytic hydrogenation and rubber plant technology, applied in the fields of hydrogenation to hydrocarbons, organic chemistry, etc., can solve the problems of polymerization or coking, affecting the effect of combustion and hydrotreating, and complex exhaust gas components. The effect of hydrogen treatment, the effect of improving the cycle

Active Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The tail gas components of rubber plants rich in C4 hydrocarbons are more complex, which is a highly unsaturated mixed C4 hydrocarbons with high content of alkynes and 1,3-butadiene, which are easy to burn or hydrotreat Polymerization or coking occurs, affecting combustion and hydrotreating effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A fixed-bed hydrogenation reactor is adopted, and the bottom feed (feed from the bottom of the reactor), and the content of the polymerization inhibitor tert-butylcatechol added to the tail gas of the rubber factory is 100mg / L. The specific surface area of ​​the catalyst Pd / C (activated carbon is coconut shell type) is 870m 2 / g, the Pd content is 0.15w%, the dosage is 30ml, the dilution ratio of the ceramic ring and the catalyst is 5:1, the ceramic ring is a ceramic Raschig ring, and the specification (diameter×height×thickness, mm) is Φ3×3×1. The catalyst needs to be reduced before use, using hydrogen reduction at 100°C. Reaction conditions: 60°C, 3.0MPa, 1.0h -1 , The amount of hydrogen is 15L / h. Gas samples of the hydrogenation products were collected and analyzed by gas chromatography. The results are shown in Table 1.

Embodiment 2

[0030] A fixed-bed hydrogenation reactor is adopted, and the feed is lowered. The content of the polymerization inhibitor tert-butylcatechol added in the tail gas of the rubber factory is 80mg / L. The specific surface area of ​​the catalyst Pd / C is 870m 2 / g, the Pd content is 0.15w%, the dosage is 30ml, and it is filled in 3 sections. The content of the supported Pd / C (activated carbon is coconut shell type) catalyst in each section of the catalyst bed is the same. The dilution ratios are 8:1, 4:1, 2.5:1 respectively. The ceramic ring is a ceramic Raschig ring, and its specification (diameter×height×thickness, mm) is Φ3×3×1. The catalyst needs to be reduced before use, using hydrogen reduction at 100°C. Reaction conditions: 60°C, 3.0MPa, 1.0h -1 , The amount of hydrogen is 15L / h. Gas samples of the hydrogenation products were collected and analyzed by gas chromatography. The results are shown in Table 1.

Embodiment 3

[0032] The reaction temperature is 65°C, the content of polymerization inhibitor tert-butylcatechol is 130mg / L, and the dilution ratios of each ceramic ring and catalyst are 9:1, 3.5:1, and 3:1, respectively. Other conditions are with embodiment 2.

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Abstract

The invention discloses a method for catalytic hydrogenation of tail gas from a rubber factory. Tert-butyl catechol is used as a polymerization inhibitor and supported Pd / C is used as a catalyst. -100°C, reaction pressure 1.5-5.0MP, rubber factory tail gas volume space velocity 0.5-1.5h-1, hydrogen volume 10-40L / h through the catalyst bed for hydrogenation reaction. The method can basically completely convert unsaturated hydrocarbons such as alkynes and dienes in the tail gas of a rubber factory into monoolefins or alkanes, and improve the utilization efficiency of C4 resources in the tail gas of the rubber factory.

Description

technical field [0001] The invention relates to a method for catalytic hydrogenation of rubber factory tail gas, in particular to a method for catalytic hydrogenation of rubber factory tail gas rich in unsaturated C4 hydrocarbons. Background technique [0002] A large amount of C4 hydrocarbons are produced in the process of petroleum refining and petrochemical production, and their comprehensive utilization is a necessary means to improve the economic benefits of enterprises. However, the utilization of C4 hydrocarbons in China is still in its infancy. [0003] CN201110036915.4 discloses a hydrogenation method of unsaturated C4. Unsaturated C4 and hydrogen are mixed and undergo two-stage hydrogenation reaction, and the obtained reactant is cooled and separated to obtain saturated C4 product; the conditions of the first-stage hydrogenation reaction are: reaction pressure 2.0-2.3MPa, and the inlet temperature of the first-stage hydrogenation reactor is 60 -90°C, bed temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/08C07C9/10C07C9/08C07C9/12C07C11/06C07C5/03C07C5/08
Inventor 苏杰乔凯陈明张宝国王春梅
Owner CHINA PETROLEUM & CHEM CORP