Paraffin mixture and method for producing same

Patent metadata

Field	Value
Publication number	US-9745231-B2
Application number	US-201314375376-A
Country	US
Kind code	B2
Filing date	Jan 11, 2013
Priority date	Feb 8, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

The present invention provides a paraffin mixture that is suitable for use as cosmetics and cleansing oil for skin and hair and has excellent volatility. The paraffin mixture according to the present invention is a mixture that contains isoparaffin having a carbon number of 12 to 16, and the mixture has a boiling point range of 185° C. to 215° C. and has the content of 2,2,4,6,6-pentamethylheptane at less than 10 mass %.

First claim

What is claimed is:

1. A method of producing a paraffin mixture comprising isoparaffin with a carbon number of 12 to 16, wherein the paraffin mixture has a boiling point range of 185° C. to 215° C. and has the content of 2,2,4,6,6-pentamethylheptane at less than 10 mass %, comprising the steps of:
Step 1) polymerizing isobutylene and normal butene in a polymerization reaction system, and removing an unreacted component and a polymer having a carbon number of 20 or more from a polymerization reaction system to obtain a polybutene mixture having a carbon number of 16 or less;
Step 2) providing a paraffin mixture having a carbon number of 16 or less by hydrogenating the polybutene mixture having a carbon number of 16 or less that is provided in step 1;
Step 3) treating the paraffin mixture having a carbon number of 16 or less that is obtained in step 2 with an adsorbent so as to have an iron content of 10 ppm or less; and
Step 4) distilling the paraffin mixture having a carbon number of 16 or less that is treated with an adsorbent in step 3 by vacuum distillation to distill off 15 mass % or more with respect to a charged quantity of the paraffin mixture before the vacuum distillation.

2. A paraffin mixture produced from the process of claim 1 comprising isoparaffins with a carbon number of 12 to 16, wherein the paraffin mixture has a boiling point range of 185° C. to 215° C. and has the content of 2,2,4,6,6-pentamethylheptane at less than 10 mass %.

Assignees

• Nof Corp

Inventors

• Koga Nariyoshi
• Nishikawa Tohru

Classifications

• A61Q3/00

  Manicure or pedicure preparations · CPC title

• A61Q1/10

  for eyes, e.g. eyeliner, mascara · CPC title

• C08F6/02

  Neutralisation of the polymerisation mass, e.g. killing the catalyst (short-stopping C08F2/42 ){also removal of catalyst residues} · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title

• A61Q1/06

  Lipsticks · CPC title