Tung oil into biodiesel cost-effective
When heated to 260 DEG C, adding linear (or Huang Danfen), to react strongly with tung oil, tung oil in the surface on a layer of white foam, and emitted strong tobacco. We must keep stirring with a wooden stick at the moment, the linear foam quickly closed with tung oil. When the color from yellow to black, a pot of tung oil temperature has dropped to 240 and 250 C. If there is no temperature measured, can take out a ripe tung oil, cooled in tin, with the index finger and thumb with tung oil dipped in a little open again, then the tung oil was pulled into filamentous, can pull to 2 cm long, the Raw tung oil is ready. The pot should be removed from the furnace quickly, and it will be cooked by natural cooling.
Cooked tung oil, also known as light oil, is made from Raw tung oil processing. Is a typical dry oil, conjunctival has better hardness and gloss. Processing method: outside a furnace hearth is built, a large iron pot, with firewood; the first Shi Zifang fried in the pan, to get rid of the stones in the water; hot stones, into the Raw tung oil. With the increase of temperature, the moisture in tung oil evaporates gradually. When the temperature rises to 180 DEG C, the water in the oil has evaporated
There is a way to boil > <DIV> this kind of paint is mainly used in wood furniture, arts and crafts, lacquer, housing and interior painting, etc.. </DIV> <P>3. </P> (1) <DIV> refining process with <BR> refining has been widely used in the preparation of purified paint lacquer semi-finished products referred to as "with students". The purification of the raw material is mainly to carry out strict and careful filtration and purification. With the traditional filtering methods described above T09-84 refined lacquer primer twist filter method. There are two kinds of methods are usually used now: one is with good wide paint materials first with 100 mesh copper wire cloth in particular special centrifuge filter, with multilayer (6<B>-</B>8 layer) processing of loose cotton bag in ground paint machine cutter filter two times; the second is using 100 mesh wire cloth filter centrifuge once, then 160-180 two mesh copper wire cloth filter (centrifugal filtration process should be down several times to paint slag scraper will be gently scraping down carefully from the filter cloth, easy to paint liquid wash) after a "match", take good care of. Among them, the latter method is not good for the former method.
