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Surface modifier for heavy calcium carbonate, and preparation and application thereof

A surface modifier, the technology of heavy calcium carbonate, is applied in the preparation of carboxylate, the preparation of carboxylic acid halide, the preparation of organic compounds, etc., to achieve the effect of simple post-treatment process, excellent sedimentation effect and excellent activation degree

Inactive Publication Date: 2018-12-04
HEZHOU UNIV
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  • Surface modifier for heavy calcium carbonate, and preparation and application thereof
  • Surface modifier for heavy calcium carbonate, and preparation and application thereof
  • Surface modifier for heavy calcium carbonate, and preparation and application thereof

Examples

Experimental program
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Embodiment

[0027] (1) Preparation of target compound ground calcium carbonate surface modifier

[0028] (1) Synthesis of Palmitoyl Chloride

[0029]

[0030] Take 10.26g\0.04mol of palmitic acid (M=256.42g / mol) in a dry single-necked round-bottomed flask, and slowly drop it into the flask with a rubber-tipped dropper under the condition of constant stirring with a collector type constant temperature heating stirrer Add (0.06mol\7.14g\4.4ml) to take 10ml of thionyl chloride (118.97g / mol, 1.638 g / ml), that is, hydrogen chloride gas will be generated, continue to stir at a certain speed after the dropwise addition, and react at room temperature for 2 After one hour, the temperature was raised to 80° C. for one hour, and then reflux was continued for 2 hours. After driving away the hydrogen chloride gas and part of the thionyl chloride, take it to the rotary evaporator for half an hour, then add 5ml of methyl tert-butyl ether and continue the rotary evaporation to remove the residual thi...

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Abstract

The invention relates to preparation and an application of a surface modifier for heavy calcium carbonate; the surface modifier has the molecular formula of C34H66O8. The preparation of the surface modifier comprises the steps: (1) taking palmitic acid (hexadecanoic acid) as a starting raw material, carrying out an acyl chloride reaction with sulfoxide chloride to obtain palmitoyl chloride; and (2) then carrying out an esterification reaction with tartaric acid to synthesize the novel calcium carbonate surface modifier dipalmitic acid tartaric acid diester with a dihydrophobic carbon chain. The application of the surface modifier comprises that the surface modifier reacts with heavy calcium carbonate, and whether the modification is successful is tested by using the changes of the activation degree, sedimentation volume and oil absorption value. The synthesis of the modifier can be completed only in two steps, and the post-treatment process is relatively simple. Compared with a traditional modifier stearic acid, the modifier has better modification effect (the oil absorption value, sedimentation effect and activation degree) on heavy calcium carbonate.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate modification, and specifically relates to a novel calcium carbonate surface modifier dipalmitate tartrate diester with double hydrophobic carbon chains and a preparation method thereof. Background technique [0002] The heavy calcium carbonate powder industry is an important branch of the heavy calcium powder industry that has become a non-metallic mineral industry. It is also a filler for the preparation of important non-metallic materials from composite materials. As the stress center of composite materials, heavy calcium carbonate powder affects the use of materials; powder Particles are easy to agglomerate. In the case of heavy calcium powder coated with a layer of modifier, it can reduce two defects and play two advantages; the surface of calcium powder is hydrophilic and oleophobic, which is not good in the dispersion of resin, which will affect the material quality. performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/28C07C67/14C07C51/60C07C53/42C09C1/02C09C3/08C09C3/04
CPCC01P2006/19C01P2006/90C07C51/60C07C67/14C07C69/28C09C1/021C09C3/006C09C3/041C09C3/043C09C3/08C07C53/42
Inventor 钟星胡彩霞严小威曾一文马文天陆海森冯丽珍
Owner HEZHOU UNIV
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