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Membrane-based method for vegetable wax discoloring

A vegetable wax and transmembrane technology, applied in chemical instruments and methods, recovery/refining of fatty substances, membranes, etc., can solve the problems of a large amount of adsorbent solid waste, large solvent consumption, residual hydrogen peroxide, etc.

Inactive Publication Date: 2018-03-16
EVONIK SPECIALTY CHEM SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] JP51-30204 uses hydrogen peroxide and the pigmentation reaction in rice bran wax, which involves multiple steps and will result in residual hydrogen peroxide
[0006] CN1071446A adopts the method of heat preservation column chromatography to decolorize with adsorbent, which consumes a lot of solvent and produces a large amount of solid waste of adsorbent

Method used

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  • Membrane-based method for vegetable wax discoloring
  • Membrane-based method for vegetable wax discoloring
  • Membrane-based method for vegetable wax discoloring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Example 1-rice bran wax decolorization and concentration

[0077] Preparation concentration is the ethyl acetate solution of 5L crude rice bran wax (dark brown, its Pantone color number is 476U, commercially available from Huzhou Shengtao Biotechnology Co., Ltd.) of 200g / L at 60°C, and this solution is added into In tank 1. Insert a Flux roll film (diameter 1.8 inches, length 12 inches, effective film area 0.1 square meters). Adjust the pump 3 to stabilize the flow rate at 150L / h, keep the system temperature at 60°C, and slowly adjust the system pressure to 30bar. After the system was stabilized, the first permeate 6 was collected at a flow rate of about 10 L / h, and 44 g / L of hot rice bran wax ethyl acetate solution 7 was continuously added to the feed tank 1 at a flow rate of 10 L / h.

[0078] Collect 20L of the first permeate 6 and add it to the feed liquid tank 8 . Insert a 280 rolls of film (diameter 1.8 inches, length 12 inches, effective film area 0.1 squ...

Embodiment 2

[0082] Reality Example 2-Sugarcane Wax Decolorization and Concentration

[0083] Prepare the ethyl acetate solution of 5L crude sugarcane wax (brown, its Pantone color number is 469U, commercially available from Shanghai Tongyi Chemical Co., Ltd.) with a concentration of 200g / L at 60°C, and add the solution to the feed tank 1 in. Insert a Flux roll film (diameter 1.8 inches, length 12 inches, effective film area 0.1 square meters). Adjust the pump 3 to stabilize the flow rate at 150L / h, keep the system temperature at 60°C, and slowly adjust the system pressure to 30bar. After the system was stabilized, the first permeate 6 was collected at a flow rate of about 7 L / h, and 40 g / L of hot sugarcane wax ethyl acetate solution 7 was continuously added to the feed tank 1 at a flow rate of 7 L / h.

[0084] Collect 20L of the first permeate and add it to the feed liquid tank 8 . Insert a 280 rolls of film (diameter 1.8 inches, length 12 inches, effective film area 0.1 square met...

Embodiment 3

[0088] Example 3-palm wax decolorization and concentration

[0089] Preparation concentration is the ethyl acetate solution of 5L crude carnauba wax (brown yellow, its Pantone color number is 145U, commercially available from Shanghai Yiba Chemical Co., Ltd.) of 200g / L at 60 ℃, and this solution is added into In tank 1. Insert a Flux roll film (diameter 1.8 inches, length 12 inches, effective film area 0.1 square meters). Adjust the pump 3 to stabilize the flow rate at 150L / h, keep the system temperature at 60°C, and slowly adjust the system pressure to 30bar. After the system was stabilized, the first permeate 6 was collected at a flow rate of about 5 L / h, and 60 g / L of hot palm wax ethyl acetate solution 7 was continuously added to the feed tank 1 at a flow rate of 5 L / h.

[0090] Collect 20L of the first permeate and add it to the feed liquid tank 8 . Insert a 280 rolls of film (diameter 1.8 inches, length 12 inches, effective film area 0.1 square meters). Stabil...

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Abstract

The invention relates to a membrane-based method for vegetable wax discoloring. The method includes: (i), providing raw material liquid of vegetable wax; (ii), providing a first nanofiltration membrane selective in permeation; (iii), enabling the raw material liquid to contact with the first nanofiltration membrane to form first penetrating liquid and first rejection liquid, wherein the method iscarried out under pressure, and rejection rate of the first nanofiltration membrane to pigment in the vegetable wax is higher than that of the same to wax ingredients in the vegetable wax. By the method, gathering of the pigment in the rejection liquid can be realized. The method can be widely applied to vegetable wax discoloring.

Description

technical field [0001] The invention belongs to the refining of vegetable wax, in particular, relates to a membrane-based method for decolorizing vegetable wax. Background technique [0002] Vegetable waxes have a wide range of industrial uses. "Extraction and Application of Vegetable Waxes" on page 37-38 of No. 2, 2003, "Gansu Chemical Industry" introduces the extraction methods and uses of some main plant waxes. [0003] The crude product of vegetable wax often contains colored substances and presents a dark color, for example, crude rice bran wax is dark brown, its use is limited, and it needs to be decolorized. [0004] Some decolorization methods of rice bran wax have been disclosed in the prior art, such as: [0005] JP51-30204 uses hydrogen peroxide and the pigment reaction in rice bran wax, this method involves multiple steps, and can cause the residue of hydrogen peroxide. [0006] CN1071446A adopts the method of heat preservation column chromatography to decolor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02C11B11/00
CPCB01D61/027C11B11/00B01D61/026B01D71/421B01D71/64B01D71/701B01D69/1216B01D2325/34B01D2311/2512C08L91/06B01D2317/025Y02W30/74B01D2311/2523B01D61/0271B01D69/02B01D69/1213B01D2325/20B01D2311/10B01D2311/14B01D2311/246
Inventor 谢健超张鸿曦
Owner EVONIK SPECIALTY CHEM SHANGHAI