Preparation method of leather meal cement foaming agent
A technology of cement foaming agent and leather scraps, which is applied in the field of preparation of protein-based cement foaming agent, can solve the problems of high production cost of surfactants, cure the symptoms but not the root cause, and achieve the advantages of low price, lower production cost and control cost. Effect
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[0022] Example 1
[0023] (1) Add the following raw materials by weight to a 250ml three-necked bottle: 40g of water, 4g of leather scraps (absolute dry weight), 0.3g of sodium hydroxide and 0.3g of madecassoside, and react under stirring conditions at 80°C 7h, suction filtration under reduced pressure, and centrifugal separation to obtain the stock solution of the hydrolyzate;
[0024] (2), adjust the pH of the above-mentioned hydrolyzed solution to 6.5, then add 35g of water, and mix well to obtain an animal protein cement foaming agent base solution;
[0025] (3), add 0.5g of gum arabic powder, 0.3g of sodium dodecyl sulfonate, 0.3g of sodium lauryl alcohol ether sulfate and 1,000 to the base liquid of animal protein cement foaming agent obtained in step (2), 0.6 g of 8-dihydroxy-3-carboxyanthraquinone was uniformly mixed at room temperature for 60 minutes to obtain a leather chip cement foaming agent.
Example Embodiment
[0026] Embodiment 2
[0027] (1) Add the following raw materials by weight to a 250ml three-necked bottle: water 50g, leather shavings 6g (absolute dry weight), calcium hydroxide 1g and madecassoside 4.1g, react at 100°C for 9h under stirring conditions , suction filtration under reduced pressure, and centrifugal separation to obtain the stock solution of the hydrolyzate;
[0028] (2), adjust the pH of the hydrolyzed solution to 7.5, then add 50 g of a sulfuric acid solution with a mass fraction of 40%, and mix evenly to obtain an animal protein cement foaming agent base liquid;
[0029] (3), add triethanolamine 2.0g, sodium dodecylbenzene sulfonate 1.0g, sodium dodecyl polyoxyethyl ether sulfate 1.0g and 1 to the animal protein cement foaming agent base liquid obtained in step (2), 2.1 g of 8-dihydroxy-3-carboxyanthraquinone was mixed and stirred at room temperature for 60 minutes to obtain a leather chip cement foaming agent.
Example Embodiment
[0030] Embodiment 3
[0031] (1) Add the following raw materials by weight to a 250ml three-necked bottle: 45g of water, 5g of leather scraps (absolute dry weight), 0.65g of potassium hydroxide and 2.2g of madecassoside, and react under stirring conditions at 90°C 8h, suction filtration under reduced pressure, and centrifugal separation to obtain the stock solution of the hydrolyzate;
[0032] (2), adjust the pH of the hydrolyzed solution to 7, then add 42.5 g of sodium hydroxide with a concentration of 30%, and mix evenly to obtain an animal protein cement foaming agent base solution;
[0033] (3), add gelatin 1.25g, sodium lauryl sulfate 0.65g, sodium lauryl polyoxyethylene ether sulfate 0.65g and 1,8- 1.4 g of dihydroxy-3-carboxyanthraquinone was mixed and stirred at room temperature for 60 minutes to obtain a leather chip cement foaming agent.
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