Hello £° Cart  Welcome to Molybdenum disulfide suppliers Exploiter Molybdenum Co., Ltd
LANGUAGE:
  • Chinese
  • English
  • French
  • Japnese
  • German
  • visa
  • discover
  • amex
  • mastercard
Working hours: Monday to Saturday 8:00 AM - 6: 00 PM
Molybdenum disulfide Free consultation hotline
:400-686-9523
Molybdenum disulfide Product Center
Molybdenum disulfide Online customer service
Company News

THE EXAMPLE OF PROCESS FOR PRODUCING MOLYBDENUM DISULFIDE

Datetime:2016/7/20 21:28:26hit:10500

THE EXAMPLE OF PROCESS FOR PRODUCING MOLYBDENUM DISULFIDE. In order to more fully illustrate the preferred embodiments of the invention, the following detailed examples are given. All parts, proportions and percentages are by weight unless otherwise given.

EXAMPLE I

About 250 pounds molybdenite ore, assaying about 66% MoS2, with the remainder being various impurities as shown in Table I, are slowly added to about 30 gallons of 3.6N sulfuric acid which has been heated to about 200°„ C. The mixture is heated to greater than 240°„ C, while agitating, for about 2 hours. The mixture is then cooled to below about 170°„ C and dropped into about 200 gallons of cold water. After agitating and settling, the mother liquor is removed and the solid MoS2 is washed. A solution containing about 25 pounds HF and about 40 pounds HCl dissolved in about 100 gallons water is then added and the resultant mixture is digested for at least about 6 hours at a temperature of at least about 70°„ C. The mother liquor is removed and the solid MoS2 is washed with water until about neutral and then filtered. The resultant MoS2 is greater than 99 percent pure and of sufficient quality to be used as a lubricant, as is illustrated in Table 1.

TABLE 1

Element Ore Analyses MoS2 after purification Mo 40% 59.5% Fe 9% 0.05% Cu 5% 5 p.p.m. Si 5% 0.18% Pb 1% 0.005% Al 1% 0.05% Ca 1% 0.01% Ti 0.5% 25 p.p.m. Mg 0.1% 50 p.p.m. Zn 0.1% -- Bi 200 p.p.m. -- Ag 50 p.p.m. 5 p.p.m. Ba 50 p.p.m. -- Co 50 p.p.m. -- Mn 50 p.p.m. <1 p.p.m. Sr 50 p.p.m. -- V 50 p.p.m. 5 p.p.m. Cr 25 p.p.m. -- Ni 25 p.p.m. <1 p.p.m. B 6 p.p.m.

EXAMPLE II

About 225 pounds of molybdenite ore, assaying about 58% MoS2, about 12% Fe, about 7% Cu, and the remainder being essentially the same impurities as shown in Table I are slowly added to about 30 gallons of 36N sulfuric acid, which has been heated to about 200°„ C. The mixture is heated to about 270°„ C, while agitating, for about 2 hours. The mixture is then cooled to about 150°„ C and added to about 200 gallons of cold water. After agitating and settling, the mother liquor is removed and the solid MoS2 is washed. A solution containing about 20 pounds HF and about 40 pounds HCl dissolved in about 100 gallons water is then added and the resultant mixture is digested for at least about 6 hours at a temperature of at least about 70°„ C. The mother liquor is removed and the solid MoS2 is washed with water until about neutral and then filtered. The resultant MoS2 is greater than 99 percent pure and of sufficient quality to be used as a lubricant.

EXAMPLE III

Essentially the same procedure as in Example II is used on about 200 pounds of molybdenite ore, assayed at about 40% MoS2, about 20% Fe, about 8% Cu, and the remainder being essentially the same impurities as shown in Table I. The resultant MoS2 is greater than 99 percent pure and of sufficient quality to be used as a lubricant.

EXAMPLE IV

Essentially the same procedure as in Example I is used on about 250 pounds of molybdenite ore, assayed at about 78% MoS2, about 5% Fe, about 2 percent copper, and the remainder being essentially the same impurities as shown in Table I with essentially the same results as obtained in the aforementioned examples.

While there has been shown and described what are at present considered to be the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined by the appended claims.