Xi'An Kono Chemical Industry Co., Ltd.

Pectin (Pectin) is a group of uronic acids. It has water solubility and can be separated from industry. Its molecular weight is about 5, in case 300 thousand. Under suitable conditions, the solution can form a gel and partially undergo methoxy (methyl esterification, that is to say, the formation of methanol esters). The main component of the solution is partially methylated a (L, 4), a D poly (lactic acid ester). The residual carboxyl units are present in the form of free acids or form salts such as potassium, sodium, and calcium.

Chinese Name: pectin

English Name: pectin

English alias: 2,3,4,5-Tetrahydroxypentanal; 9000-69-5; pentose

CAS: 9000-69-5

Molecular formula: C5H10O5

Molecular weight: 150.1299

synthetic method

Generally extracted from orange peel, apple, grape skins, silkworm excrement and beet dregs in plant cells.

The extraction of pectin is acid hydrolysis, enzymatic hydrolysis and ion exchange. At present, the acid solution is more mature. There are two processes for acid hydrolysis. Here, orange peel is used as the raw material. Acid aluminum salt solution after clarification with 1% ammonia precipitation method to adjust the pH value to 3.8 orange hydrolysate, and the pectin precipitated out of aluminum potassium sulfate. After separation, the alcohol was washed 3~4 times to remove the aluminum salt. Finally, adjust the pH value to 2.8, and then dry, dry and smash the finished product. Acid hydrolysis of ethanol precipitation method, orange peel to 2 to 3mm, water immersion 40min and boil for a moment, in order to kill pectinase. After draining, the orange peel was soaked with 10 times 0.06mol/L hydrochloric acid at 80 DEG C for hydrolysis of 1.5h. The concentrated solution was filtered and clarified to concentrate 3% of the concentration. Activated carbon was used to remove 10min at 80 DEG C, and 95% ethanol was added to the filtrate to make ethanol concentration reach 50%. At this point, pectin precipitated out, filtered, ethanol washing, vacuum drying, crushing, finished products. Such as at room temperature, orange peel with 95% ethanol soak 24h extraction of pigment, then the hydrolysate can not be activated carbon decolorization. In addition, citric acid or oxalic acid can be used instead of hydrochloric acid.

2. extraction method is adopted.

Take apple peel as raw material, wash it thoroughly, add 1.8 times the hot water of the peel quality, then add concentrated hydrochloric acid, extract it by heating, then filter through the press filter, and then concentrate in the vacuum concentrating tank. The concentrated liquid pectin adding ethanol, tartaric acid, mixing, precipitation, drying, washing and vacuum drying, crushing, sieving and. It can also be extracted from citrus, peel and other pectin containing plants.

Main use

Pectin 1. of industrial production from 80% to 90% for the food industry, the production of gel jelly, jam and jelly. It can also be used as a hemostatic agent and a substitute for plasma in medicine, and can also be used to treat diarrhea and heavy metal poisoning.

2. used as an emulsion stabilizer and thickener. Our country stipulates that it can be used for various kinds of food and should be used in moderation according to production requirements.

The make-up water for more than 3., acid powder, because it is in alkaline medium is not stable enough, and therefore cannot be used in alkaline cosmetics. Pectin non-toxic, non irritating, can be used for the import of cosmetics, such as lipstick and so on. It can also be used as thickener and binder for toothpaste.