Gelatin is a translucent, colorless, flavorless food derived from collagen obtained from various animal raw materials. It is commonly used as a gelling agent in food, pharmaceutical drugs, photography, and cosmetic manufacturing. It is found in most gummy candy, as well as other products such as marshmallows, gelatin desserts, and some ice creams, dips, and yogurts.


Manufacturing process

Gelatin is a mixture of peptides and proteins produced by partial hydrolysis of collagen extracted from the skin, bones, and connective tissues of animals such as domesticated cattle, chicken, pigs, and fish. On a commercial scale, gelatin is made from by-products of the meat and leather industries. Gelatin is derived from pork skins (44%), bovine hides (28%), or cattle bones (27%). The raw materials are prepared by different curing, acid, and alkali processes that are employed to extract the dried collagen hydrolysate.

The animal parts are inspected and cut. Then, the bones, tissues, and skins are loaded into chopping machines that cut the parts into small pieces. They are passed under high-pressure water sprays to wash away debris. They are then degreased and dried. The animal parts are soaked in vats of lime or some other type of acid or alkali for several days. This process removes most of the minerals and bacteria and facilitates the release of collagen. The acid wash is typically a 4% hydrochloric acid. The alkaline wash is a potassium or sodium carbonate. The pieces of bone, tissue, and skin are loaded into large aluminum extractors and boiled in distilled water. The liquid is then extracted and sterilized by flash-heating. From the extractor, the liquid is piped through filters to separate out bits of bone, tissue or skin that are still attached. From the filters, the liquid is piped into evaporators, machines that separate the liquid from the solid gelatin. The liquid is piped out and discarded.


GAB Neumann’s process equipment

The production of gelatin involves diluted hydrochloric acid that shall be preheated at a suitable temperature to ensure the process efficiency. GAB Neumann offers graphite block heat exchangers, graphite heaters, graphite coolers, and annular groove graphite heat exchangers to gelatin producers for the heating of hydrochloric acid.


Associated products:

Impervious graphite block heat exchangers

Impervious graphite annular groove partial condensers

GAB Neumann GmbH

Alemannenstrasse 29

79689 Maulburg


Tel: +49 (7622) 6751 0

Fax: +49 (7622) 6751 20

GAB Neumann GmbH | Alemannenstrasse 29 | D-79689 Maulburg | Phone +49 (7622) 6751 0 | Fax +49 (7622) 6751 20 | E-Mail |