LIGNOCELLULOSE PRESERVATIVE COMPOSITION, PROCESS USING SUCH COMPOSITION, PRESERVED LIGNOCELLULOSIC MATERIAL OBTAINABLE BY SUCH PROCESS AND PRODUCT COMPRISING SUCH MATERIAL
The invention relates to a lignocellulose preservative composition comprising in the range of from 50 to 98 wt % of a pyrolysis oil obtainable by pyrolysis of lignocellulosic material, a polymerisable furan compound and a catalyst for polymerising the furan compound in a catalytically effective amount. The invention further relates to a process for producing preserved lignocellulosic material comprising impregnating lignocellulosic material by immersion in such composition and subsequently curing the impregnated material and to preserved lignocellulosic material obtainable by such process and to an engineered wood or non-wood product comprising such lignocellulosic material.
1 - 15 . (canceled)
16 . A lignocellulose preservative composition, comprising:
(a) 50 to 98 wt % of a pyrolysis oil obtainable by pyrolysis of lignocellulosic material;
(b) a polymerisable furan compound; and
(c) a catalytically effective amount a catalyst for polymerising the furan compound.
17 . The lignocellulose preservative composition according to claim 16 , wherein the catalyst is selected from the group consisting of anhydrides, acids, chlorides and combinations thereof.
18 . The lignocellulose preservative composition according to claim 16 , wherein the polymerisable furan compound is furfuryl alcohol.
19 . The lignocellulose preservative composition according to claim 16 , comprising catalyst from 1 to 30 wt %, based on the weight of furan compound.
20 . The lignocellulose preservative composition according to claim 16 , comprising 70 to 90 wt % of the pyrolysis oil.
21 . A lignocellulose preservative composition according to claim 16 , comprising 10 to 40 wt % furan compound, based on the total weight of the composition.
22 . A lignocellulose preservative composition according to claim 16 , wherein the pyrolysis oil is obtainable by fast or flash pyrolysis of lignocellulosic material.
23 . A process for producing preserved lignocellulosic material, comprising:
(a) immersing the lignocellulosic material in a composition according to claim 16 to obtain a impregnated lignocellulosic material; and
(b) heating the impregnated lignocellulosic material to a temperature in the range from 70 to 200° C. thereby polymerising the furan compound.
24 . The process according to claim 23 , wherein the lignocellulosic material is wood.
25 . The process according to claim 24 , wherein the wood is untreated wood.
26 . The process according to claim 23 , wherein the immersing is carried out at a temperature between 25 to 90° C.
27 . The process according to claim 24 , wherein the immersing is carried out at a temperature between 25 to 90° C.
28 . The process according to claim 23 , wherein the immersing is carried out at a pressure between atmospheric pressure to 20 bar (absolute).
29 . The process according to claim 24 , wherein the immersing is carried out at a pressure between atmospheric pressure to 20 bar (absolute).
30 . The process according to claim 23 , wherein the lignocellulosic material has a moisture content of at most 30 wt %.
31 . A process according to claim 24 , wherein the lignocellulosic material has a moisture content of at most 30 wt %.
32 . A preserved lignocellulosic material obtainable by a process according to claim 23 .
33 . A preserved lignocellulosic material obtainable by a process according to claim 24 .
34 . Engineered wood or non-wood product comprising preserved lignocellulosic material according to claim 32 .
35 . Engineered wood or non-wood product comprising preserved lignocellulosic material according to claim 33 .