A method for controlling volatile fatty acids of natural rubber latex
A volatile fatty acid and natural latex technology, applied in the field of natural rubber processing, can solve the problems of increasing the amount of acid used for latex coagulation, volatile, pungent odor, etc., and achieve the effects of prolonging storage time, improving stability, and reducing sucrose content
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Embodiment 1
[0019] Weigh 2 g of calcium oxide in deionized water, fully stir, and prepare a suspension with a mass fraction of 1%, add 80 g of a 1% sodium lauryl sulfate aqueous solution for subsequent use;
[0020] Take 25,000g of fresh natural rubber latex, the total solid content is 31.4%, and its sucrose content is determined to be 10.33mg / mL. Add the pre-configured sodium lauryl sulfate-calcium oxide mixture, stir well and let it stand for 30min to measure its sucrose content. The content is 6.02mg / mL. After centrifugal concentration, its total solid content is determined to be 60.35%, and its volatile fatty acid value is 0.014. After standing for 60 days, its volatile fatty acid value is determined to be 0.016.
Embodiment 2
[0022] Weigh 4g of calcium hydroxide in deionized water, fully stir, and prepare a suspension with a mass fraction of 1%, add 60g of a 1% sodium lauryl sulfate aqueous solution, mix well, and set aside;
[0023] Weigh 25000g of fresh natural rubber latex, the total solid content is 31.4%, and its sucrose content is determined to be 10.33mg / mL, add the pre-configured sodium lauryl sulfate-calcium hydroxide mixture, fully stir and let it stand for 30min, determine Its sucrose content is 4.36 mg / mL. After centrifugal concentration, its total solid content was determined to be 61.15%, and its volatile fatty acid value was 0.014. After standing for 60 days, its volatile fatty acid value was determined to be 0.015.
Embodiment 3
[0025] Weigh 3 g of calcium oxide in deionized water, fully stir, and prepare a suspension with a mass fraction of 1%, add 80 g of a 1% sodium lauryl sulfate aqueous solution for subsequent use;
[0026] Take 50000g of fresh natural rubber latex, the total solid content is 30.4%, and the sucrose content is determined to be 10.58mg / mL. This fresh latex is divided into two parts on average, one part is directly centrifuged, and its total solid content is determined to be 60.12%, and the volatile fatty acid value is 0.017. After standing for 60 days, the volatile fatty acid value increases to 0.026; the other part is added to the pre-configured Sodium lauryl sulfate-calcium oxide mixed solution, after being fully stirred, let it stand for 40 minutes, and its sucrose content was determined to be 5.45 mg / mL. After centrifugal concentration, its total solid content was determined to be 60.03%, and its volatile fatty acid value was 0.015. Days later, its volatile fatty acid value was...
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