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Preparation method of composite carrier

A technology of composite carrier and silica gel, which is applied in the field of preparation of composite carrier, can solve the problems of low content of magnesium chloride adsorbed on silica gel, low catalytic activity, complicated manufacturing method, etc., and achieve good fluidity, improved catalytic activity, and low manufacturing cost.

Pending Publication Date: 2021-11-02
无锡玖汇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a composite carrier. The prepared composite carrier is a silica gel composite carrier with a higher content of magnesium chloride, which can effectively solve the problems existing in the conventional magnesium chloride-silica gel composite carrier preparation method. The technical problems of high manufacturing cost, complex manufacturing method, low content of magnesium chloride adsorbed on silica gel, and low catalytic activity after loading the catalyst

Method used

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  • Preparation method of composite carrier
  • Preparation method of composite carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The method of preparing a silica gel composite carrier having a magnesium chloride content in this example is as follows:

[0032] 5.5 kg of sodium silicate was placed in the reactor, and 50 kg of deionized water was added, and the concentration of 0.0% sulfuric acid was added to the side, and after 2 hours, the aqueous sulfuric acid aqueous solution was adjusted to 2 ~ 3, aging reaction for 2 hours, was washed multiple times with deionized water, filtered until the sodium ion content in the reaction system was ≤0.1% by weight, and the plate frame filter was filtered to prepare a silica gel cake.

[0033] The silica gel cake was placed in a pulverket, and 2.7 kg of sixwater chloride powder and deionized water gamping were added. The slurry solid content was controlled at 15%, and the prepared slurry was used to apply a fine grinding pump to circulate 4 times, after measuring pump The centrifugal spray dryer is introduced for spray drying to obtain a water-containing composi...

Embodiment 2

[0036] The method of preparing a silica gel composite carrier having a magnesium chloride content in this example is as follows:

[0037] 5.5 kg of sodium silicate was placed in the reactor, and 50 kg of deionized water was added, and the concentration of 0.0% sulfuric acid was added to the side, and after 2 hours, the aqueous sulfuric acid aqueous solution was adjusted to 2 ~ 3, aging reaction for 2 hours, was washed multiple times with deionized water, filtered until the sodium ion content in the reaction system was ≤0.1% by weight, and the plate frame filter was filtered to prepare a silica gel cake.

[0038]The silica gel cake was put into beating kettle, 5.3kg of magnesium chloride hexahydrate powder and deionized water pulping, the slurry solids content is controlled to 15%, after application of the slurry prepared fine grinding polishing pump cycle 4 times, by a metering pump introducing a centrifugal spray drier was spray dried to obtain a composite aqueous carrier.

[003...

Embodiment 3

[0041] The method of preparing a silica gel composite carrier having a magnesium chloride content in this example is as follows:

[0042] 5.5 kg of sodium silicate was placed in the reactor, and 50 kg of deionized water was added, and the concentration of 0.0% sulfuric acid was added to the side, and after 2 hours, the aqueous sulfuric acid aqueous solution was adjusted to 2 ~ 3, aging reaction for 2 hours, was washed multiple times with deionized water, filtered until the sodium ion content in the reaction system was ≤0.1% by weight, and the plate frame filter was filtered to prepare a silica gel cake.

[0043] The silica gel cake was put into beating kettle, 9kg magnesium chloride hexahydrate powder and deionized water pulping, the slurry solids content is controlled to 15%, after application of the slurry prepared fine grinding polishing pump cycle 4 times, introduced by a metering pump a centrifugal spray drier was spray dried to obtain a composite aqueous carrier.

[0044] Ac...

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Abstract

The invention relates to the technical field of catalyst carriers for polyolefin, in particular to a preparation method of a composite carrier. A silica gel composite carrier with high magnesium chloride content is prepared through a magnesium chloride hexahydrate and silicon dioxide colloid associated crystallization method, and the composite carrier can be used for preparing a polyolefin catalyst, especially a Z-N catalyst for ethylene polymerization. According to the preparation method of the composite carrier provided by the invention, the content of magnesium chloride loaded on the silica gel can be remarkably increased, so that the activity of a catalyst loaded on the composite carrier is improved, the yield and quality of a polymerization product are improved, and the technical problem that an existing magnesium chloride silica gel composite carrier is high in manufacturing cost, low in magnesium chloride content, small in magnesium-silicon ratio, low in loaded catalyst activity and the like can be effectively solved.

Description

Technical field [0001] The present invention relates to the technical field of polyolefin catalyst carrier, and more particularly to a method of preparing a composite carrier. Background technique [0002] During the production of polyolefins, in order to ensure that the polymer has good particle morphology and a higher density, the stability and continuity of the polymer production process are generally loaded by physical or chemical methods. Good, intensity, an inert inorganic carrier, to obtain a polyolefin catalyst having a good particle shape, high mechanical wear strength and high catalytic activity. [0003] The magnesium chloride is a carrier which is the desirable amount of high-efficiency catalyst is prepared by its unique chemical structure and properties, and the traditional Ziegler-NATTA catalyst for magnesium chloride is used for olefin polymerization has high catalytic activity, but the fluidity is not good, at a higher temperature Broken fraction and wear during t...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/02
CPCC08F10/00C08F4/025
Inventor 吕佳烨郑高飞李善武郑家铖葛志昶
Owner 无锡玖汇科技有限公司
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