Method for preparing washing surfactant by utilizing tanning waste chrome shavings
A technology of surfactant and chrome leather scraps, applied in the field of preparation of surfactants for washing, can solve problems such as environmental pollution, waste of raw material leather resources, etc., solve the problem of environmental pollution, have excellent degreasing effect, and facilitate cake making and granulation Effect
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[0028] Example 1
[0029] Method for preparing surface active agent for washing by using tannery waste , Follow the steps below:
[0030] (1) The original form of dechromization of chrome leather shavings: Add dried CaO7g, chrome leather shavings 50g, and 500mL of distilled water into a beaker, mix evenly, soak at 35°C for 1 day, wash with water and filter the residue. Add 6g NaCl, 300mL of distilled water, 15g of oxalic acid and 15mL of concentrated sulfuric acid, stir and mix, dechromate at 30℃ for 3h, wash and filter the filter residue, add 250mL of distilled water, 10g of NaOH and 5g of NaCl, dechromate at 20℃ for 30min, adjust the pH to neutral , The filter residue is collected by washing and filtering; after drying, the original form of dechrome product is obtained.
[0031] (2) Hydrolyze the original form of dechromated product to prepare protein peptide hydrolysate: Add 0.8g of calcium oxide and 100ml of distilled water for every 20g of original form of dechromed product in...
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[0039] Example 2
[0040] Method for preparing surface active agent for washing by using tannery waste , Follow the steps below:
[0041] (1) Dechrome in original form of chrome leather shavings: add 5g of dried CaO, 50g chrome leather shavings, and 500mL of distilled water into a beaker. After evenly mixing, soak at 30°C for 48h, and filter the residue after washing. Add 5g NaCl, 360mL of distilled water, 10g of oxalic acid and 15mL of concentrated sulfuric acid, stir and mix, dechrome at 25℃ for 2h, wash and filter the filter residue, add 350mL of distilled water, 5g of NaOH and 10g of NaCl, dechrome at 30℃ for 60min, adjust the pH to neutral , The filter residue is collected by washing and filtering; after drying, the original form of dechrome product is obtained.
[0042] (2) Hydrolyze the original form of dechromated product to prepare protein peptide hydrolysate: add 1.6g of calcium oxide and 50ml of distilled water for every 20g of original form of dechromed product in a th...
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