Ultrafine nepheline syenite
A useable particulate nepheline syenite having a grain size to provide an Einlehner Abrasive Value of less than about 100 is described. The particulate nepheline syenite is generally free from agglomeration and moisture free. At least 99% of the nepheline syenite particles have a size less than 10 microns. In practice, the nepheline syenite grain size is less than about 5 microns and the distribution profile of the particulate system is generally 4-5 microns.
1 . A moisture-free composition comprising particulate nepheline syenite wherein at least 99% of the particles of nepheline syenite have a size less than about 10 microns.
2 . The composition of claim 1 wherein at least 99% of the particles of nepheline syenite have a size less than about 5 microns.
3 . The composition of claim 1 wherein at least 99% of the particles of nepheline syenite have a size of from about 4 to about 5 microns.
4 . The composition of claim 1 wherein the particulate nepheline syenite produces an Einlehner abrasive value less than 100.
5 . The composition of claim 4 wherein the Einlehner abrasive value is less than about 50.
6 . The composition of claim 1 wherein more than 99% of the particles of nepheline syenite have a size of about 5 microns.
7 . The composition of claim 1 wherein the particles of nepheline syenite have a size of from 5 microns to about 1 micron.
8 . The composition of claim 1 wherein the particles of nepheline syenite have a size of less than about 4 microns.
9 . The composition of claim 1 wherein the particles of nepheline syenite have a distribution profile of sizes from less than 10 microns to at least 1 micron.
10 . The composition of claim 9 wherein the distribution profile of sizes is from about 4 to about 5 microns.
11 . The composition of claim 1 wherein the particles of nepheline syenite have a maximum size of 10 microns and the particles produce an Einlehner abrasive value of less than 100.
12 . The composition of claim 11 wherein the particles produce an Einlehner abrasive value of about 50.
13 . The composition of claim 11 wherein the particles of nepheline syenite have a size of less than 5 microns.
14 . The composition of claim 1 wherein the particles of nepheline syenite have a maximum size of 5 microns and the particles produce an Einlehner abrasive value of less than about 50.
15 . The composition of claim 1 wherein the particles of nepheline syenite have a size in the range of 0.5 to 5 microns.
16 . The composition of claim 1 wherein the particles are essentially free from agglomeration.
17 . A moisture-free composition comprising particulate nepheline syenite wherein at least 99% of the particles of nepheline syenite have a size of from 1 to 10 microns and the particles produce an Einlehner abrasive value of less than 100.
18 . The composition of claim 17 wherein the particles produce an Einlehner abrasive value of about 50.
19 . The composition of claim 17 wherein the Einlehner abrasive value is less than 50.
20 . The composition of claim 17 wherein the particles of nepheline syenite have a size of from about 5 microns to about 1 micron.
21 . The composition of claim 17 wherein at least 99% of the particles of nepheline syenite have a size of from about 4 to about 5 microns.
22 . The composition of claim 17 wherein more than 99% of the particles of nepheline syenite have a size of about 5 microns.
23 . The composition of claim 17 wherein the particles of nepheline syenite have a size of less than about 4 microns.
24 . The composition of claim 17 wherein the particles of nepheline syenite have a distribution profile of sizes from less than 10 microns to at least 1 micron.
25 . The composition of claim 24 wherein the distribution profile of sizes is from about 4 to about 5 microns.
26 . The composition of claim 17 wherein the particles are essentially free from agglomeration.
27 . Moisture-free particulate nepheline syenite comprising particles of nepheline syenite having a size of less than 10 microns, wherein the particulate nepheline syenite produces an Einlehner abrasive value of less than 100.
28 . The particles of claim 27 wherein the particles of nepheline syenite have a size less than 5 microns.
29 . The particles of claim 27 wherein the particles of nepheline syenite have a size of from about 4 to about 5 microns.
30 . The particles of claim 27 wherein the particulate nepheline syenite produces an Einlehner abrasive value less than 50.
31 . The particles of claim 27 wherein more than 99% of the particles of nepheline syenite have a size of about 5 microns.
32 . The particles of claim 27 wherein the particles of nepheline syenite have a size of from 5 microns to about 1 micron.
33 . The particles of claim 27 wherein the particles of nepheline syenite have a size of less than about 4 microns.
34 . The particles of claim 27 wherein the particles of nepheline syenite have a distribution profile of sizes from less than 10 microns to at least 1 micron.
35 . The particles of claim 34 wherein the distribution profile of sizes is from about 4 to about 5 microns.
36 . The particles of claim 27 wherein the particles produce an Einlehner abrasive value of about 50.
37 . The particles of claim 36 wherein the particles of nepheline syenite have a size of less than 5 microns.
38 . The particles of claim 27 wherein the particles of nepheline syenite have a size in the range of 0.5 to 5 microns.