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Continuous production method for leather fatting agent

A technology of leather fatliquoring agent and production method, which is applied in leather impregnation, chemical treatment of small raw hide/big raw hide/leather skin/fur, small raw hide/large raw hide/leather/fur treatment, etc., and can solve problems affecting the actual application of products Problems such as layering of production products and complex preparation process, etc., to achieve the effect of easy control, difficult control, and easy access to raw materials

Inactive Publication Date: 2020-03-06
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the raw materials of the synthetic fatliquor are mostly solid at normal temperature or low temperature, the existing public synthetic methods mostly adopt the intermittent single-pot production method of adding a large amount of solvent or directly putting the raw materials into the kettle and adopting "one-pot cooking". Complexity, low utilization rate of equipment, high energy consumption and easy to cause stratification of production products, unstable quality, affecting the actual application of products

Method used

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  • Continuous production method for leather fatting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At a temperature of 63±2°C, mix 1300kg of mineral oil solvent, 250kg (where R 1 for-C 12 h 25 , m=2), 250kg (where R 2 for-C 14 h 29 , n=3) two kinds of fatty alcohol polyoxyethylene ether monomers with different carbon chain lengths are added to material mixer 1 continuously and uniformly according to the speed of 300kg / h, 50kg / h and 50kg / h respectively; The homogeneous material flowing out and the liquid maleic anhydride are mixed in the material mixer 2, wherein the total mixing amount of the liquid maleic anhydride is 125kg, and the flow rate continuously injected into the mixer 2 is 25kg / h. The uniformly mixed material from the material mixer 2 is continuously transferred to the parallel stainless steel esterification reaction insulation kettle 3 or 4 with a volume of 1500L (wherein: when the material in the insulation kettle 3 reaches the set liquid level, the interlock device is automatically activated. Switch to the insulation kettle 4), under the prote...

Embodiment 2

[0032] At a temperature of 60±2°C, mix 1200kg of mineral oil solvent, 200kg (where R 1 for-C 14 h 29 , m=3), 300kg (where R 2 for-C 16 h 33, n=4) two kinds of fatty alcohol polyoxyethylene ether monomers with different carbon chain lengths are added to material mixer 1 continuously and uniformly according to the speed of 240kg / h, 40kg / h and 40kg / h respectively; The homogeneous material flowing out and the liquid maleic anhydride are mixed in the material mixer 2, wherein the total mixing amount of the liquid maleic anhydride is 125kg, and the flow rate continuously injected into the mixer 2 is 20kg / h. The uniformly mixed materials from the material mixer 2 are transferred continuously at a constant speed to the parallel enamel material esterification reaction insulation kettle 3 or 4 with a volume of 1000L (wherein: when the material in the insulation kettle 3 reaches the set liquid level, the interlock device is automatically activated Switch to the insulation kettle...

Embodiment 3

[0035] At a temperature of 57±2°C, mix 1500kg of mineral oil solvent, 187.5kg (where R 1 for-C 16 h 33 , m=2), 375kg (where R 2 for-C 18 h 37 , n=3) two kinds of fatty alcohol polyoxyethylene ether monomers with different carbon chain lengths are added to the material mixer 1 continuously and uniformly according to the speed of 250kg / h, 30kg / h and 62kg / h respectively; The homogeneous material flowing out and the liquid maleic anhydride are mixed in the material mixer 2, wherein the total mixing amount of the liquid maleic anhydride is 140kg, and the flow rate continuously injected into the mixer 2 is 25kg / h. The uniformly mixed materials from the material mixer 2 are transferred continuously at a constant speed to the parallel enamel material esterification reaction insulation kettle 3 or 4 with a volume of 1000L (wherein: when the material in the insulation kettle 3 reaches the set liquid level, the interlock device is automatically activated Switch to the insulatio...

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Abstract

The invention provides a method for continuously synthesizing a leather fatting agent with liquid maleic anhydride, polyoxyethylene ethers with different aliphatic chains and a water-soluble sulfonating agent as raw materials through esterification and partial sulfonation in a system in which mineral oil exists. According to the invention, maleic acid is used as a connecting group of two fatty alcohol-polyoxyethylene ethers and is used as a sulfonation site; through a sulfonation reaction and a continuous feeding production mode, product quality is stabilized, the utilization rate of equipmentis increased, and automatic industrial production is easy to realize; in the whole process, automatic cooling of materials is achieved in a continuous material transferring mode; reaction process iseasy to control; a conversion rate is high; reaction conditions are mild; operation is safe; and industrial operation is easy.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals production, and in particular relates to a continuous production method of leather fatliquor. Background technique [0002] Leather fatliquoring is an important process in a series of processing from raw hide to finished leather. It is crucial to the performance of finished leather. Specifically, under certain conditions, oil is applied directly or in the form of emulsion to the processed leather, so Its lubricating oil components penetrate deep into the skin fibers of the leather, increasing the mobility between the leather fibers, making the leather soft and resistant to folding, and at the same time avoiding the stiffness of the leather surface caused by the bonding of the leather fibers. Fragile defects. The fatliquored leather has good hand feeling and physical and mechanical properties, while reducing the shrinkage of the leather surface and increasing the finished leather area. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 程终发王燕平陆久田申义驰刘全华邱玉章齐晓婧
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD