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Vermiculite composite filter aid with chain termination properties and preparation method thereof

A filter aid and chain termination technology, applied in the field of preparation of vermiculite composite filter aid, can solve the problems of complex polymerization termination process, large environmental pollution, and low yield

Inactive Publication Date: 2020-07-17
LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These polymerization termination processes are complex, with low yields and long set-up times, and produce a large amount of waste liquid and residue such as acid-base salts, which are difficult to effectively treat and cause serious environmental pollution.

Method used

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  • Vermiculite composite filter aid with chain termination properties and preparation method thereof
  • Vermiculite composite filter aid with chain termination properties and preparation method thereof
  • Vermiculite composite filter aid with chain termination properties and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. Preparation of composite filter aid

[0015] Take 6g of hexamethylenetetramine, add it into 20mL of mixed solvent made of ethanol, n-butanol, and butyl acetate (10mL, 5mL, and 5mL for ethanol, n-butanol, and butyl acetate, respectively), and make a termination Liquid HMA;

[0016] Weigh 20g of vermiculite powder and 10g of kaolin, add them to the above stop solution, stir at 70-80°C for 5-6 hours, and grind to obtain the functional composite filter aid GN-HMA.

[0017] 2. Composite filter aid is used for termination and filtration of petroleum resin liquid

[0018] Weigh 500mL of ethylene cracking by-products into the reactor, add 5mL of boron trifluoride diethyl ether initiator dropwise at the polymerization temperature (30°C), the color of the system immediately changes from light yellow transparent liquid to maroon translucent liquid, accompanied by Rapid exothermic phenomenon, about 1 hour to complete the dropwise addition, and then keep the polymerization reac...

Embodiment 2

[0021] 1. Preparation of composite filter aid

[0022] Take 4g of hexamethylenetetramine and add it to 20mL of mixed solvent made of ethanol, n-butanol and butyl acetate (5mL, 10mL and 5mL of ethanol, n-butanol and butyl acetate respectively) to form Stop solution HMA;

[0023] Weigh 15g of vermiculite mineral powder and 15g of kaolin, add them to the above stop solution, stir at 70-80°C for 5-6 hours, and grind to obtain the functional composite filter aid GN-HMA.

[0024] 2. Composite filter aid is used for termination and filtration of petroleum resin liquid

[0025] Weigh 500mL of ethylene cracking by-products into the reactor, add 3mL of boron trifluoride diethyl ether initiator dropwise at the polymerization temperature (35°C), the color of the system immediately changes from light yellow transparent liquid to maroon translucent liquid, accompanied by Rapid exothermic phenomenon, about 1 hour to complete the dropwise addition, and then keep the polymerization reaction ...

Embodiment 3

[0028] 1. Preparation of composite filter aid

[0029] Take 8g of melamine pyrophosphate and add it to 30mL of a mixed solvent made of ethanol, n-butanol and butyl acetate (20mL, 5mL and 5mL for ethanol, n-butanol and butyl acetate respectively) to make a stop solution HMA ;

[0030] Weigh 12g of vermiculite mineral powder and 8g of kaolin, add them to the above stop solution, stir at 70-80°C for 5-6 hours, and grind to obtain the functional composite filter aid GN-HMA.

[0031] 2. Composite filter aid is used for termination and filtration of petroleum resin liquid

[0032] Weigh 500mL of ethylene cracking by-products into the reactor, add 7mL of boron trifluoride diethyl ether initiator dropwise at the polymerization temperature (25°C), the color of the system immediately changes from light yellow transparent liquid to maroon translucent liquid, accompanied by Rapid exothermic phenomenon, about 1 hour to complete the dropwise addition, and then keep the polymerization reac...

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Abstract

The invention discloses a preparation method of a petroleum resin vermiculite composite filter aid with cationic polymerization chain termination features. According to the method, hexamethylenetetramine is dissolved into a mixed solvent prepared from ethanol, n-butyl alcohol and n-butyl acetate to be prepared into termination liquid; then, vermiculite ore powder and kaolin are added in the termination liquid; stirring is performed for 5 to 6 hours at 70 to 80 DEG C to obtain a petroleum resin filter aid. The kaolin and the vermiculite are used as a carrier; under the effect of organic solvents of ethanol, butanol, butyl ester and the like, through the effects of hydrogen bonds and static electric force, the crystal layer space is increased; substances such as hexamethylenetetramine are adsorbed to enter the intercalation layer; the interlayer ammonium nitrogen hydrogen oxygen chains are in bridged connection through the hydrogen bonds; the effective solvation is realized, so that thelayer house structure thixotropic gel is formed and become carrier substances with termination and filter aid effects. The composite filtering aid is used in the termination of positive ion polymerization reaction; the characteristics of fast chain termination reaction, high efficiency, simple process and the like are realized.

Description

technical field [0001] The invention relates to a preparation method of a vermiculite composite filter aid with chain termination characteristics, which is mainly used for the termination and filtration of cationic petroleum resin polymerization, and belongs to the technical field of composite materials and macromolecules. Background technique [0002] In the production process of petroleum cracking to ethylene, a large amount of mixed solvents containing olefinic compounds will be produced, usually olefinic compounds account for about 30-60% of the total, and its composition varies with factors such as cracking raw materials, cracking depth, cracking equipment and process parameters. And changes, so the composition is complex, the ratio is unstable, the composition fluctuates greatly, and it is difficult to continue to effectively separate. It is usually used directly as waste solvent, or converted into saturated solvent by hydrogenation, used as fuel oil and mixed solvent,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D37/02
CPCB01D37/025
Inventor 吕维华伍家卫唐蓉萍马庭洲周艳青张怀远王守伟王有朋罗资琴陈淑芬苏海潮周锦
Owner LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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