Method for Producing a Latent Heat Storage Material and Dialkyl Ether as a Latent Heat Storage Material

Abstract

The invention relates to a method for producing latent heat storage material from linear alcohols by dehydrating to dialkyl ethers or to olefins, and hydrating to paraffins and dialkyl ether as a latent heat storage material.

1 - 17 . (canceled) 
     
     
         18 . New. A method for absorbing heat by liquefying a latent heat storage material and emitting the heat stored in the latent heat storage material following cooling by solidifying, by using a latent heat storage material produced from linear fatty alcohols, comprising dehydrating linear fatty alcohols, wherein more than 95% by mass of the fatty alcohols used are linear, to produce;
 (a) olefins, wherein the olefins are hydrated to paraffins, the paraffins comprising exclusively a certain C-number at more than 95% by mass, or   (b) dialkyl ethers of the formula R 1 —O—R 2 , wherein R 1  and R 2 , independent of one another, are hydrocarbon residues with 6 to 22 carbon atoms, wherein more than 95% by mass of the sum of all residues R 1  and R 2  comprise the same C-number, and the residues R 1  and R 2  are equal.   
     
     
         19 . New. The method according to  claim 18 , characterized in that said paraffins comprise even-numbered chain lengths at more than 95% by mass. 
     
     
         20 . New. The method according to  claim 18 , characterized in that said paraffins exclusively comprise a certain C-number at more than 97% by mass. 
     
     
         21 . New. The method according to  claim 18 , characterized in that said dialkyl ethers comprise even-numbered chain lengths at more than 91% by mass. 
     
     
         22 . New. The method according to  claim 18 , characterized in that said dialkyl ethers exclusively comprise a certain C-number at more than 94% by mass. 
     
     
         23 . New. The method according to  claim 18 , characterized in that said fatty alcohols, in the case of the producing olefins are cetyl alcohol or stearyl alcohol, and in case of producing dialkyl esters are lauryl alcohol or myristyl alcohol. 
     
     
         24 . New. The method according to  claim 18 , characterized in that said fatty alcohols are obtained from native vegetable raw materials. 
     
     
         25 . New. The method according to  claim 18 , characterized in that said fatty alcohols are produced by ethylene oligomerisation according to the Ziegler synthesis. 
     
     
         26 . New. The method according to  claim 18 , characterized in that one or more of said latent heat storage materials are encapsulated by a polymer material as the capsule wall into micro-capsules with average particle sizes in the range from 1 to 200 um, or into macro-capsules with average particle sizes in the range from more than 200 um to 2 cm. 
     
     
         27 . New. A method for storing heat by liquefying and emitting heat by solidifying as in a latent heat storage material comprising using as said latent heat storage material dialkyl ethers of the formula R 1 —O—R 2 , wherein R 1  and R 2 , independent of one another, are hydrocarbon residues with 6 to 22 carbon atoms, and wherein
 more than 95% by mass of the sum of all residues R 1  and R 2  are linear, 
 more than 95% by mass of the sum of all residues R 1  and R 2  have the same C-number, and 
 the residues R 1  and R 2  are equal. 
 
     
     
         28 . New. The method according to  claim 27 , characterized in that more than 98% by mass of the sum of all residues R 1  and R 2  are linear. 
     
     
         29 . New. The method according to  claim 27 , characterized in that more than 95% by mass, of the sum of all residues R 1  and R 2  are even-numbered. 
     
     
         30 . New. The method according to  claim 27 , characterized in that more than 97% by mass of the sum of all residues R 1  and R 2  comprise the same C-number. 
     
     
         31 . New. The method according to  claim 27 , characterized in that said dialkyl ethers are derived from the hydration of fatty alcohols, in particular lauryl alcohol or myristyl alcohol. 
     
     
         32 . New. The method according to  claim 31 , characterized in that fatty alcohols are obtained from native vegetable raw materials. 
     
     
         33 . New. The method according to  claim 27 , characterized in that said latent heat storage material is encapsulated by a polymer material as the capsule wall into micro-capsules with average particle sizes in the range from 1 to 200 um, or into macro-capsules with average particle sizes in the range from more than 200 um to 2 cm. 
     
     
         34 . New. The method according to  claim 24 , comprising dehydrating said fatty alcohols to produce said alcohols having at least one of the following characteristics:
 more than 95% by mass of said alcohols are linear or   the alcohols comprise even-numbered chain lengths at more than 95% by mass; or   the alcohols comprises a certain C-number at more than 97% by mass.