Method for coproduction of chrome tanning agent and menadione

A technology of menadione and chrome tanning agent, which is applied in the field of co-production of menadione with chrome tanning agent, can solve the problems of difficult expansion of output and large one-time investment, and achieve low production cost, reduction of waste liquid discharge, The effect of reducing production costs

Inactive Publication Date: 2009-01-21
SHANDONG DAHUA GUANGJI BIOCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolysis process is undoubtedly a scientific and reasonable process route. The disadvantage is that the one-time investment is large and it is difficult to expand the output.

Method used

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  • Method for coproduction of chrome tanning agent and menadione

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation process is as follows:

[0028] ① Preparation of Menadione

[0029] Add 10g of methylnaphthalene (content>95%), 35g of water and 0.35g of EL series emulsifier into a 500ml reaction flask, and stir and mix fully at 40°C. In addition, add 40g of sodium red alum (content > 98%) and 85ml of water into another 500ml reaction bottle, slowly add 60g of concentrated sulfuric acid under the condition of stirring and cooling down, and cool down to 40°C to get "red liquid" for use; The solution was slowly added dropwise to the first reaction bottle under stirring conditions, and the temperature was kept at 48°C. After the drop, the temperature was slowly raised to 70°C for 0.5 hours, and then the temperature was lowered to 45°C, filtered and dried to obtain a bright yellow crystalline powder. 6.5g, assay content 91.1%, yield 48%.

[0030] ② Preparation of basic chromium sulfate

[0031] Get preparation menaquinone gained mother liquor 200ml and measure unreacted...

Embodiment 2

[0033] The preparation process is as follows:

[0034](1) Preparation of menadione: Add 10g of methylnaphthalene, 55g of water and 0.38g of EL series emulsifier into a 500ml first reaction bottle, stir and mix thoroughly at 40°C; in addition, add 75g of sodium red alum and 110ml of water into 500ml of a second reaction In the bottle, slowly add 105 grams of 98% sulfuric acid under the condition of stirring and lowering the temperature, and cool down to 40°C to obtain the red liquid for use; then slowly add the prepared red liquid dropwise into the first reaction bottle under the condition of stirring, keeping The temperature was 43°C, slowly raised to 60°C after dropping, reacted for 0.5 hours, then cooled to 42°C, filtered and dried to obtain 7.5g of bright yellow crystalline menadione powder, assayed content 97.2%, yield 59%. ;

[0035] (2) The preparation of basic chromium sulfate: get the mother liquor 200ml that prepares menadione gained and record unreacted Na 2 Cr 2 ...

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Abstract

The invention discloses the production of menadione, in particular disclosing a method for manufacturing menadione through combining with a chrome tanning agent. The method is characterized in that the method comprises the following (1) a step of preparing menadione, during which, methylnaphthalene, water and EL series emulsifying agents are added in a first reaction bulb; moreover, sodium bichromade and water are added in a second reaction bulb, and concentrated sulfuric acid is added slowly while stirring for cooling down; then prepared red liquor is slowly dripped into the first reaction bulb while stirring, and is filtered and dried so as to obtain bright yellow crystallized menadione powder; and (2) a step of preparing basic chrome sulphate, during which, the mother liquor obtained during preparing menadione is taken out, and sodium bichromade and dextrose solution are added in order; and chrome tanning agent basic chrome sulphate is obtained after spray drying. Through adopting a chrome tanning agent basic chrome sulphate production device to carry out joint production for menadione, the method realizes maximization of resource utilization; moreover, the method greatly reduces production cost for both sides and the release of waste liquids.

Description

(1) Technical field [0001] The invention relates to the production of menadione, in particular to a method for co-production of menadione with chrome tanning agent. (2) Background technology [0002] The derivative of menadione is vitamin K. Menadione is used in the synthesis of vitamin K. After vitamin K is absorbed by animals, it is converted into menaquinone in the body, so the application of menadione is the application of vitamin K. [0003] Vitamin K is a derivative of menadione, also known as blood coagulation vitamin or anti-bleeding vitamin, it is a vitamin necessary for the formation of prothrombin in animals. There are two types of vitamin K found in nature: phylloquinone found in green plants, known as vitamin K 1 , another menaquinone synthesized by animals' intestines and other microorganisms, known as vitamin K 2 . Synthetic vitamin K 3 、K 4 . Vitamin K 1 It can also be synthesized artificially. Vitamin K 3 It has high activity, is water-soluble, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C50/12C07C46/04C01G37/08
Inventor 陈林世史兰东邢良勇刘云霞
Owner SHANDONG DAHUA GUANGJI BIOCHEM ENG
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