1-butylene dimerization in ion solution and method for producing c8 and c12 olefin by dimerization

The technology of ionic liquid and butene is applied in the field of dimerization and trimerization of 1-butene in ionic liquid to produce C8 and C12 olefins, which can solve the difficulty in synthesizing cyclooctadiene hexafluoroacetylacetonate nickel catalyst, which is expensive, Rapid inactivation and other problems, to achieve the effect of simple synthesis and production cost, low cost and short reaction time

Inactive Publication Date: 2003-05-21
SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the cyclooctadiene hexafluoroacetylacetonate nickel catalyst is difficult to synthesize, the price is extremely expensive, the deactivation is rapid, and the conversion rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, 3.6 grams of 1-butyl-3-methylimidazolium chloride and 0.3677 grams of nickel acetate were successively added in a 500 milliliter (ml) polytetrafluoroethylene autoclave, then cooled to -6°C, and aluminum trichloride was added 3.9212 grams, pour 60 milliliters of by-product liquid 1-butene, 2.0 grams of diethylaluminum chloride from naphtha steam cracking and refinery fluid catalytic cracking into 60 milliliters. The temperature was controlled at 50°C, the reaction time was controlled at 4 hours, and then the material in the autoclave was cooled to -6°C with a cryogenic cooling tube. Open the kettle and take a sample, the upper layer is a colorless clear night, the lower layer is a black mucus, pour out the supernatant, and carry out GC-MS measurement, the reaction conversion rate reaches 96%, and the dimerization selectivity is C 8 Alkenes accounted for 77%, C 8 The main products are methylheptene and 3,4-dimethylhexene.

Embodiment 2

[0020] First, 3.05 grams of 1-butyl-3-methylimidazolium chloride and 0.5238 grams of nickel trifluoroacetate were successively added to a 500 milliliter (ml) polytetrafluoroethylene autoclave, then cooled to -6°C, and trichloro 3.3347 grams of aluminum, poured into 60 milliliters of liquid 1-butene and 1.7 grams of diethylaluminum chloride. The temperature was controlled at 52°C, the reaction time was controlled at 3 hours, and then the material in the autoclave was cooled to -6°C by cooling with a cryogenic cooling tube. Open the kettle and take a sample, the upper layer is a colorless clear night, the lower layer is a black mucus, pour out the supernatant, and carry out GC-MS measurement, the reaction conversion rate reaches 95.2%, and the dimerization selectivity is C 8 Alkenes accounted for 83.9%, C 8 The main products are methylheptene and 3,4-dimethylhexene.

Embodiment 3

[0022] First, 4.95 grams of 1-butyl-3-methylimidazolium chloride and 0.3399 grams of nickel carbonate were successively added in a 500 milliliter (ml) polytetrafluoroethylene autoclave, then cooled to -6°C, and aluminum trichloride was added 5.401 g, pour 60 ml of liquid 1-butene and 2.75 g of diethylaluminum chloride. The temperature was controlled at 30°C, the reaction time was controlled at 4 hours, and then the material in the autoclave was cooled to -6°C by cooling with a cryogenic cooling tube. Open the kettle and take a sample, the upper layer is a colorless clear night, the lower layer is a black mucus, pour out the supernatant, and carry out GC-MS measurement, the reaction conversion rate reaches 97.62%, and the dimerization selectivity is C 8 Alkenes accounted for 80.0%, C 8 The main products are methylheptene and 3,4-dimethylhexene.

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Abstract

The method for producing C8 and C12 olefine by means of dimerization and trimerization in ion liquid and by using 1-butylene includes the following steps: in a high-pressure still adding 1-butyl-3-methyl imidazole chlorine 3.05-4.95g, nickel salt 0.3399-0.5238g, aluminium trichloride 3.3347-5.4019 g in turn, then cooling to -6 deg.C, pouring 60 ml of liquid 1-butylene and 1.7-2.75 g of monochloro-diethyl aluminium, controlling temp. at 30-50 deg.C, controlling reaction time at 5 min-4 hr., cooling to -6 deg.c, and automatically demixing the product and catalyst, finally determining by GC-MS, its reaction conversion rate can be up to 80-95% and selectivity of dimerization is 78-92%.

Description

technical field [0001] The present invention relates to the production of C with 1-butene 8 and C 12 The technology of olefins, the technology of the present invention is particularly applicable to the dimerization and trimerization production of C 8 and C 12 olefins. Background technique [0002] C 8 and C 12 Olefins are important raw materials for polyethylene plasticizers and alkylphenol surfactants, and are widely used in petrochemical, light industry, textile and pesticide fields, and have a wide market. At present, at home and abroad, it is mainly obtained from the cutting fraction of ethylene oligomerization and olefin superposition products, and some are obtained by dimerizing butene with a solid catalyst. [0003] By-products of naphtha steam cracking to ethylene and refinery fluid catalytic cracking C 4 Distillate resources are increasingly abundant with the development of the petrochemical industry. After extracting products such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/06C07C11/02
Inventor 单永奎谢在库戴立益金照生杨昕姚亚平何鸣元陈庆龄
Owner SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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