# US 10,479,949 B2 · Process for producing naphthenic bright stocks

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,479,949 B2
- Document ID: US10479949B2
- Status: Granted
- Kind: B2
- Application number: 15/511,496
- Filed: 2015-09-17
- Published: 2017-10-05
- Granted: 2019-11-19
- Earliest claimed: 2014-09-17
- Assignees: Ergon, Inc.
- Applicants: Ergon, Inc.
- Inventors: John K. Patrick; Howard Don Davis; Edward William Casserly
- Web page: https://patentgrep.com/patent/US10479949B2

## CPC

- C10G 69/08: including at least one step of reforming naphtha
- C10G 65/12: including cracking steps and other hydrotreatment steps
- C10M 101/02: Petroleum fractions
- C10M 177/00: Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
- C10G 2300/202: Heteroatoms content, i.e. S, N, O, P
- C10G 2300/302: Viscosity
- C10G 2300/304: Pour point, cloud point, cold flow properties
- C10M 2203/1065: used as base material
- C10M 2203/1085: used as base material
- C10N 2070/00: Specific manufacturing methods for lubricant compositions
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

A process for producing naphthenic bright stocks from low quality naphthenic crude feedstocks. The naphthenic bright stocks produced by the process have improved low temperature properties at high yields based on feedstock.

## Claims

### Claim 1

A process for producing a naphthenic bright stock comprising the steps of:
a) dewaxing a hydrotreated deasphalted naphthenic oil having a sulfur content of about 0.01 up to about 0.5% by weight (as measured by ASTM D4294) and a nitrogen content of about 0.01 up to about 0.1% by weight (as measured by ASTM D5762) in the presence of a dewaxing cracking catalyst and under catalytic dewaxing conditions to produce a dewaxed effluent;
b) hydrofinishing the dewaxed effluent to produce a dewaxed hydrofinished effluent having reduced levels of polycyclic aromatic hydrocarbon compounds and reduced levels of unstable olefinic compounds; and
c) fractionating the dewaxed hydrofinished effluent to separate the dewaxed hydrofinished effluent into one or more gaseous fractions and one or more liquid fractions to provide a naphthenic bright stock having a pour point (as measured by ASTM D5949) reduced by 10° C. compared to that of the deasphalted naphthenic oil, at a yield greater than 85% of total naphthenic bright stock over total deasphalted naphthenic oil.

### Claim 2 (depends on 1)

The process of claim 1, wherein the hydrotreated deasphalted naphthenic oil comprises hydrotreated deasphalted naphthenic crude, hydrotreated deasphalted waxy naphthenic crude, hydrotreated deasphalted naphthenic distillate or a mixture thereof.

### Claim 3 (depends on 1)

The process of claim 1, wherein the hydrotreated deasphalted naphthenic oil comprises a blend of naphthenic crude, waxy naphthenic crude or a naphthenic distillate with paraffinic feedstock, paraffinic distillate, light or heavy cycle oil, deasphalted oil, cracker residue, hydrocarbon feedstock containing heteroatom species and aromatics and boiling at about 150° C. to about 550° C. (as measured by ASTM D7169), or mixture thereof.

### Claim 4 (depends on 1)

The process of claim 1, wherein the hydrotreated deasphalted naphthenic oil is prepared from a heavy naphthenic feedstock having a sulfur content up to about 5% by weight (as measured by ASTM D4294) and a nitrogen content up to about 3% by weight (as measured by ASTM D5762) and has a cloud point from 8 to 27° C.

### Claim 5 (depends on 1)

The process of claim 1, wherein the hydrotreated deasphalted naphthenic oil has a cloud point from 8 to 27° C.

### Claim 6 (depends on 1)

The process of claim 1, wherein the dewaxing cracking catalyst is chosen from a molecular sieve zeolite having a 10-membered oxygen ring and a mordenite framework inverted zeolite.

### Claim 7 (depends on 1)

The process of claim 1, wherein the dewaxing cracking catalyst is a ZSM-5 catalyst.

### Claim 8 (depends on 1)

The process of claim 1, wherein the dewaxing cracking catalyst is a bifunctional catalyst having both a dewaxing function and a hydrogenation function.

### Claim 9 (depends on 1)

The process of claim 1, wherein the catalytic dewaxing conditions comprise a temperature from about 260° C. to about 399° C., a pressure from about 5,515 kPa to about 27,579 kPa, and a liquid hourly space velocity from about 0.25 h−1 to about 7 hr−1.

### Claim 10 (depends on 1)

The process of claim 1, wherein the hydrofinishing conditions comprise a temperature from about 260° C. to about 399° C., a pressure from to about 5,515 kPa to about 27,579 kPa, and a liquid hourly space velocity from about 0.25 to about 5 hr−1.

### Claim 11 (depends on 1)

The process of claim 1, wherein the hydrofinishing step uses a lower reactor temperature and higher liquid hourly space velocity compared to the reactor temperature and liquid hourly space velocity used for the dewaxing step.

### Claim 12 (depends on 1)

The process of claim 1, wherein the naphthenic bright stock has an aniline point (ASTM D611) about 100° C. to about 140° C. and a flash point (Cleveland Open Cup, ASTM D92) about 188° C. to about 409° C.

### Claim 13 (depends on 1)

The process of claim 1, wherein the naphthenic bright stock has a viscosity index (VI) greater than 75, a viscosity (SUS at 98.9° C.) of about 165 to about 250 and a pour point (° C., ASTM D5950) of about 42 to about −39° C.

### Claim 14 (depends on 1)

The process of claim 1, wherein the yield is greater than about 97%.

### Claim 15 (depends on 1)

The process of claim 1, wherein the naphthenic bright stock contains no more than 10 ppm total polycyclic aromatic hydrocarbon 8-markers and no more than 1 ppm benzo[a]pyrene as evaluated using European standard EN 16143:2013.

### Claim 16 (depends on 15)

The process of claim 15, wherein the naphthenic bright stock contains no more than 1 ppm total polycyclic aromatic hydrocarbon 8-markers.

### Claim 17 (depends on 1)

The process of claim 1, wherein the naphthenic bright stock contains no more than 30 ppm total of the polycyclic aromatic hydrocarbon compounds acenaphthene, acenaphthylene, anthanthrene, anthracene, benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(b)naphtho[1,2-d]thiophene, benzo(e)pyrene, benzo(ghi)fluoranthene, benzo(ghi)perylene, benzo(j)fluoranthene, benzo(k)fluoranthene, benzo[c]phenanthrene, chrysene, coronene, cyclopenta(c,d)pyrene, dibenzo(a,e)pyrene, dibenzo(a,h)anthracene, dibenzo(a,h)pyrene, dibenzo(a,i)pyrene, dibenzo(a,l)pyrene, fluoranthene, fluorene, indeno[123-cd]pyrene, naphthalene, perylene, phenanthrene, pyrene and triphenylene.

### Claim 18 (depends on 17)

The process of claim 17, wherein the naphthenic bright stock contains no more than 20 ppm total of the polycyclic aromatic hydrocarbon compounds.

### Claim 19 (depends on 17)

The process of claim 17, wherein the naphthenic bright stock contains no more than 10 ppm total of the polycyclic aromatic hydrocarbon compounds.

### Claim 20 (depends on 1)

The process of claim 1, further comprising hydrotreating a deasphalted naphthenic oil by contacting the deasphalted naphthenic oil with a hydrotreating catalyst in the presence of hydrogen under hydrotreating conditions to provide the hydrotreated deasphalted naphthenic oil having a sulfur content of about 0.01 up to about 0.5% by weight (as measured by ASTM D4294) and a nitrogen content of about 0.01 up to about 0.1% by weight (as measured by ASTM D5762).

### Claim 21 (depends on 20)

The process of claim 20, further comprising deasphalting a naphthenic feedstock having a sulfur content up to about 5% by weight (as measured by ASTM D4294) and a nitrogen content up to about 3% by weight (as measured by ASTM D5762) to separate the deasphalted naphthenic oil from an asphalt and resins fraction.

### Claim 22

A naphthenic bright stock having an aniline point (as measured by ASTM D611) of about 100° C. to about 140° C., a flash point (as measured using a Cleveland Open Cup and ASTM D92) of about 188° C. to about 409° C., a viscosity index (VI) greater than 75, a viscosity (SUS at 98.9° C.) of about 165 to about 250, a pour point (as measured using ASTM D5950) of about 42° C. to about −39° C., and wherein the naphthenic bright stock contains less than 10 ppm total polycyclic aromatic hydrocarbon 8-markers and less than 1 ppm benzo[a]pyrene as evaluated using European standard EN 16143:2013.