New preparation method for drag reducer polymer

A technology of polymer and drag reducing agent, applied in the field of preparation of drag reducing agent polymer, can solve the problems of complicated operation and difficult discharging, and achieve the effect of sufficient operation time

Active Publication Date: 2014-07-09
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of difficult discharge and complicated follow-up operation of the old method, the inventor proposed a new method of controlled prepolymerization in a small kettle, which was applied to the production of drag reducer polymer for HG pipeline oil products

Method used

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preparation example Construction

[0027] The preparation method of the drag reducer polymer of the present invention may include the following steps: 1) Add an inert solvent, a small amount of monomer, a co-catalyst and a main catalyst in the pre-polymerization tank, and carry out polymerization reaction at low temperature to form catalyst particles suspended in A slurry with a moderate viscosity of the polyolefin solution; 2) Add the monomer, the co-catalyst and the external electron donor, and the materials in the prepolymerization tank quantitatively into the small reaction vessel, and then carry out polymerization. The monomer, co-catalyst and external electron donor added in step 2) can be added to the small reaction vessel separately, or can be pre-mixed in the mixing tank, stirred, cooled and then added to the small reaction vessel together. In the present invention, the monomer, cocatalyst and external electron donor are preferably mixed and cooled in the mixing tank.

[0028] The small reaction vessel...

Embodiment 1

[0036] (1) 200 kilograms of octene, 150 kilograms of decene, 150 kilograms of dodecene and 1.2 kilograms of cocatalyst triisobutylaluminum and 65 grams of external electron donors (by weight ratio of diisobutylene) Propyldimethoxysilane: dicyclopentyldimethoxysilane=5:1) Add into the mixing tank and stir to cool to -10°C, the monomer does not undergo polymerization reaction;

[0037] (2) Add 11 kg (containing about 3 mass% octene) of n-heptane into the prepolymerization kettle, then add 0.3 kg of triisobutylaluminum, cool to -10°C, and add 100 g of triisobutyl aluminum through the catalyst feeding port Titanium chloride (titanium content: 2.7% by mass). Reacting for 30 minutes under stirring to obtain a slurry in which the catalyst particles are suspended in the polyolefin solution with a viscosity of 100 mPa.s to 1000 mPa.s.

[0038] (3) Use a peristaltic pump to quantitatively add the materials in the mixing tank and the pre-polymerization tank into a small reaction vessel ...

Embodiment 2

[0040] (1) 150 kg of purified monomer octene, 150 kg of decene, 200 kg of dodecene and cocatalyst 1.3 triisobutylaluminum and 65 grams of external electron donor (weight ratio of diisopropyl dimethoxysilane:dicyclopentyldimethoxysilane=1:5) into the mixing tank and stirred and cooled to -10°C, the monomer does not undergo polymerization reaction;

[0041] (2) Add 11 kg of solvent (about 3 mass% octene) into the prepolymerization kettle, then add 0.2 kg of triisobutylaluminum, cool to -5°C, and then add 100 g of titanium trichloride through the catalyst feed port (Titanium content: 2.7% by mass). React for 40 minutes under stirring to obtain a slurry with a viscosity of 100 mPa.s to 1000 mPa.s suspended in the polyolefin solution.

[0042] (3) Use a peristaltic pump to quantitatively add the materials in the mixing tank and the prepolymerization tank into the small reaction vessel according to the weight ratio of 40:1, and then put them into the cold storage at -10°C to 10°C f...

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Abstract

The purpose of the present invention is to overcome problems of difficult material discharging, complex subsequent operations, and the like in the old process. According to the present invention, a new process adopting a small kettle to carry out controllable pre-polymerization is adopted, and is used in production of a HG pipe oil product drag reducer polymer. The preparation method for the drag reducer polymer can comprises the following steps: 1) adding an inert solvent, a small amount of a monomer, an assistant catalyst and a main catalyst to a pre-polymerization autoclave, and carrying out a polymerization reaction at a low temperature, such that the catalyst particles are suspended in the polyolefin solution to form a slurry with moderate viscosity; and 2) adding a monomer, an assistant catalyst, an external electron donor, and the material inside the pre-polymerization autoclave to a small reaction vessel according to a certain amounts, and carrying out polymerization.

Description

technical field [0001] The invention relates to a preparation method of a high molecular polymer, in particular to a preparation method of a drag reducer polymer. Background technique [0002] As the high polymer of drag reducing agent in oil phase, α-olefin homopolymer and its copolymer have better drag reducing effect at present. Generally, the polymerized monomers used are 1-octene, 1-decene, 1-dodecene and 1-hexadecene, etc., the main catalyst is complex titanium trichloride, and the co-catalyst is aluminum alkyl. [0003] Olefin polymerization belongs to coordination ionic polymerization, which is a polymerization reaction under the action of a complex catalyst. Usually, the polymerization process is that the monomer and the catalyst (accurately called the initiator) first undergo complexation, and then pass through the transition state. The body "inserts" between the active chain and the catalyst to make the active chain grow. [0004] At present, there are mainly tw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/14C08F2/06C08F4/646F17D1/17
Inventor 张宁曹旦夫姜和圣范军忠贾宝芳成旭霞吴杰王德治李皓苏航殷寿成倪广地贾邦龙祖海燕庄君杨辉崔迪王一然赵亮张一丁
Owner CHINA PETROLEUM & CHEM CORP
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