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Method for producing ethyl toluene

A technology of ethyltoluene and toluene, which is applied in the field of ethyltoluene production, can solve the problems of inability to adjust the ratio accurately, short regeneration cycle, etc.

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing technology cannot accurately adjust the ratio of ortho, m and p ethyltoluene in the product, and the regeneration period is short, and a new method for producing ethyltoluene is provided

Method used

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  • Method for producing ethyl toluene
  • Method for producing ethyl toluene
  • Method for producing ethyl toluene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalyst preparation: 65 parts of SiO 2 / Al 2 O 3 The HZSM-5 raw powder with a molar ratio of 90 and 35 parts of binder alumina are kneaded into a mold, and the extruded strip product is dried overnight and calcined in a muffle furnace at 550°C for 6 hours to remove the residual template agent. The obtained sample was immersed in an aqueous solution of ammonium dihydrogen phosphate with a concentration of 2.0 to 5.0 wt%, immersed for 2 hours, filtered, dried overnight, and calcined in a muffle furnace at 550°C for 6 hours to prepare a phosphorus-modified sample. Add a silicone oil solution with a concentration of 10-50wt% to the above-mentioned phosphorus-modified sample, soak for 2 hours, filter and dry overnight, and roast in a muffle furnace at 550°C for 6h to prepare silicon-modified or phosphorus-silicon modified sample. In the silicone oil solution, the content of methyl silicone oil is 0-40 wt%, the content of amino silicone oil is 0-10 wt%, and the solvent is n-h...

Embodiment 2

[0024] Catalyst preparation: 65 parts of SiO 2 / Al 2 O 3 The HZSM-5 raw powder with a molar ratio of 90 and 35 parts of binder alumina are kneaded into a mold. The extruded strip product is dried overnight and then calcined in a muffle furnace at 550°C for 6 hours to remove the residual template agent. The obtained sample was immersed in an aqueous solution of ammonium dihydrogen phosphate with a concentration of 2.0 wt%, immersed for 2 hours, filtered, dried overnight, and calcined in a muffle furnace at 550°C for 6 hours to prepare a phosphorus-modified sample. Add a silicone oil solution containing 20% ​​by weight of methyl silicone oil and 10% by weight of amino silicone oil to the above-mentioned phosphorus-modified sample, soak for 2 hours, filter and dry overnight, and calcinate in a muffle furnace at 550°C for 6 hours to prepare silicon modified Or phosphorous-silicon modified samples. The solvent is n-hexane. The number of times of silicone oil modification is 1 to 5 ...

Embodiment 3

[0027] Load the catalyst sample in [Example 1] into a fixed bed reactor with a filling amount of 6.5 g. Use toluene (> 99%) and polymer grade ethylene as the raw material for reaction, the ethylene flow rate is 13.4 g / h, and the toluene flow rate is 176.0 g / h. The molar ratio of toluene and ethylene is 4.0, and the total material space velocity is 29.2 hours -1 The reaction temperature is 360°C and the pressure is 0.5MPa. The results of the reaction conversion rate and the selectivity of various products are shown in Table 1. The selectivities of the ortho, meta, and para ethyl toluene products have a wide distribution range, which can meet the different requirements of different enterprise users for and selectivity.

[0028] Table 1-Reaction performance under different modification conditions

[0029]

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Abstract

The invention relates to a method for producing ethyl toluene, mainly solves the problems in the prior art that the proportion of o-ethyltoluene, m-ethyltoluene and p-ethyltoluene in the product can not be accurately modulated, and the regeneration period problem is short. The invention uses toluene and ethylene as raw materials, which contact with a catalyst to generate ethyl toluene under the conditions of reaction temperature of 300-440 DEG C, reaction pressure of 0.1-2.0 MPa, molar ratio of toluene and ethylene of 1.0-16.0 and total feed space velocity of 5-80 / h. The catalyst is a phosphorus silicon modified HZSM-5 molecular sieve, and comprises the following components by weight: a) 75.0-100 parts of HZSM-5 molecular sieve; b) 0.2-5.0 parts of P2O5; c) 2.0-20.0 parts of amorphous SiO2; and d) 10-50 parts of an adhesive. The technical scheme can well solve the problem, and can be used in industrial production of ethyl toluene.

Description

Technical field [0001] The invention relates to a method for producing ethyl toluene. Background technique [0002] Ethyl toluene is a derivative of toluene, with three isomers of ortho-ethyltoluene, meta-ethyltoluene and para-ethyltoluene. Among them, p-toluene is the most widely used, and can be used for further dehydrogenation to prepare para-methylstyrene. Para-methyl styrene is an important monomer for the production of poly-para-methyl styrene (PPMS), unsaturated polyester, and thermoplastic elastomers. It can also replace styrene in the manufacture of ABS resin and other binary components. , Terpolymer, p-methylstyrene is also widely used in nuclear industry, polyacid reinforced fiber and alkyl coatings, etc., and the application is very wide. In addition to para-ethyl toluene, meta-ethyl toluene is another useful reaction product. It can not only be used for dehydrogenation to produce meta-methylstyrene (a functional monomer), but also can be widely used as an intermedi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/02C07C2/66B01J29/40
CPCY02P20/52
Inventor 沈震浩孙洪敏张斌宦明耀薛明伟杨为民
Owner CHINA PETROLEUM & CHEM CORP
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