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Hydrofinishing method for glycol

A technology of hydrorefining and ethylene glycol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of unstable product quality and low light transmittance of ethylene glycol

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a method for ethylene glycol hydrogenation refining aimed at the problem of unstable product quality of ethylene glycol, in which poor ethylene glycol raw materials (low UV transmittance) are processed through a multi-stage hydrogenation process After hydrogenation upgrading, polyester grade ethylene glycol is obtained

Method used

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  • Hydrofinishing method for glycol
  • Hydrofinishing method for glycol

Examples

Experimental program
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Effect test

preparation example 1

[0074] Preparation of Raney nickel catalyst supported by polymer material:

[0075] (1) Extrude polypropylene powder (Maoming Petrochemical, F280M) with a twin-screw extruder and cut it into Φ3mm×3~5mm particles;

[0076] (2) Weigh 100g of polypropylene particles and place them in the nickel-aluminum alloy particles. The Ni content in the nickel-aluminum alloy is 48wt%, the Fe metal content is 1.5wt%, the Cr metal content is 1.5wt%, and the La metal content is 1.0wt% %, the Al metal content is 48wt%, molded with a flat vulcanizer for 10min under the conditions of a temperature of 220°C and a pressure of 7MPa, took out and cooled, sieved, and sieved out spherical particles, and the surface of the particles was completely covered by Raney alloy particles, that is, the catalyst was obtained. Weighing 420g;

[0077] (3) configure 20% NaOH aqueous solution 400g with deionized water, add step (2) gained catalyst 40g, keep temperature 85 ℃, filter out solution after 8 hours, promptl...

preparation example 2

[0079] Preparation of composite hydrogenation catalyst CAT-1:

[0080] (1) 100 mass parts of liquid epoxy resin (Baling Petrochemical, CYD-128), 85 mass parts of curing agent methyltetrahydrophthalic anhydride (MeTHPA) (Guangdong Shengshida Technology and Trade Co., Ltd.), curing accelerator triethanolamine (TEA) (Tianjin Chemical Reagent No. 1 Factory) 1.5 parts by mass were stirred evenly;

[0081] (2) Take by weighing 50g of the epoxy curing system prepared in step (1) and 150g of nickel-aluminum alloy particles and fully stir and mix. In the nickel-aluminum alloy, the Ni content is 48wt%, and the aluminum content is 52wt%. Take an appropriate amount of mixture and add it to the cylinder In the mold, use a flat vulcanizer to press for 30 minutes at a temperature of 120 ° C and a pressure of 7 MPa, and use a flat vulcanizer to press for 90 min at a temperature of 150 ° C and a pressure of 7 MPa, and take it out after cooling to obtain a granular catalyst precursor;

[0082]...

preparation example 3

[0085] Preparation of composite hydrogenation catalyst CAT-2:

[0086] (1) 100 mass parts of liquid epoxy resin (Baling Petrochemical, CYD-128), 85 mass parts of curing agent methyltetrahydrophthalic anhydride (MeTHPA) (Guangdong Shengshida Technology and Trade Co., Ltd.), curing accelerator triethanolamine (TEA) (Tianjin Chemical Reagent No. 1 Factory) 1.5 parts by mass were stirred evenly;

[0087] (2) Take by weighing 40g of the epoxy curing system prepared in step (1) and 180g of nickel-aluminum alloy particles and fully stir and mix, the Ni content in the nickel-aluminum alloy is 48wt%, the aluminum content is 52wt%, and an appropriate amount of mixture is added to the cylinder In the shaped mold, press with a flat vulcanizer at a temperature of 120° C. and a pressure of 7 MPa for 30 minutes, and with a flat vulcanizer at a temperature of 150° C. and a pressure of 7 MPa for 90 minutes, and take it out after cooling to obtain a granular catalyst precursor;

[0088] (3) Me...

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Abstract

The invention provides a hydrofinishing method for glycol. The method comprises two-stage hydrogenation procedures. In the primary hydrogenation procedure, a high polymer material-supported Raney nickel catalyst, a crude glycol product and hydrogen contact with each other in a first reactor for a reaction so as to obtain a first material flow; and in the secondary hydrogenation procedure, a firsthydrogenation catalyst, the first material flow and hydrogen are subjected to a contact reaction in a second reactor so as to obtain a second material flow. Optionally, the method further comprises atleast one more stage of hydrogenation after the secondary hydrogenation procedure, and a compound hydrogenation catalyst is used in each stage of hydrogenation. With the method, a poor raw glycol material (with low ultraviolet transmittance) undergoes hydrogenation and upgrading through multiple stages of hydrogenation, so polyester-grade glycol is obtained.

Description

technical field [0001] The present invention relates to the technical field of ethylene glycol refining process, more specifically, to a method for ethylene glycol hydrofining. Background technique [0002] Ethylene glycol is an important chemical raw material with a wide range of uses and can be used as a raw material for antifreeze and polyester fibers. Ethylene glycol can be freely mixed with water, has a high boiling point and a low freezing point, and is a very commonly used antifreeze agent. As an important organic chemical raw material, ethylene glycol is widely used in the preparation of polyester chips, various antifreezes, coolants, rosin esters, desiccants, and softeners. [0003] Ethylene glycol is mainly used in the production of polyester and automobile antifreeze. The two consume more than 90% of the total amount of ethylene glycol, of which polyester accounts for 79.5% and antifreeze accounts for 12.4%. When ethylene glycol is used to produce polyester chip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/90C07C31/20B01J31/34B01J25/02
CPCB01J25/02B01J31/34C07C29/90C07C31/202Y02P20/52
Inventor 蒋海斌鲁树亮张晓红吴佳佳王秀玲彭晖乔金樑
Owner CHINA PETROLEUM & CHEM CORP
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